An oral implant autogenous bone block fixing and trimming device

Abstract

This invention discloses a device for fixing and trimming autologous bone grafts for dental implants, belonging to the field of dental medical device technology. The device includes a first clamping arm and a second clamping arm; the first and second clamping arms are hinged together by fasteners to form a scissor-like lever structure; the first clamping arm includes a first gripping part and a first clamping section, the first clamping section being connected to a positioning frame; the second clamping arm includes a second gripping part and a second clamping section; the second clamping section is connected to a movable pressure plate; the positioning frame and the movable pressure plate are arranged opposite to each other and together enclose a bone placement cavity for accommodating and fixing the autologous bone graft. This invention adopts an integrated design, integrating four core functions—stable clamping, anti-slip fixation, precise cutting guidance, and pre-positioning of bone screw holes—into a single handheld instrument, achieving a "one-stop" precise, efficient, and stable preparation from bone graft to ready-to-use bone graft.

Description

Technical Field

[0001] This invention belongs to the field of oral medical device technology, specifically relating to a device for fixing and trimming autologous bone blocks for dental implants. Background Technology

[0002] Dental implant technology is now widely used for the restoration of missing teeth and has become one of the preferred clinical options. However, many patients suffer from severe alveolar bone atrophy and insufficient bone volume due to long-term tooth loss, periodontal disease, trauma, or congenital factors, making it difficult to meet the bone quality requirements for implant placement. To reconstruct sufficient bone volume, autologous bone grafting is recognized as the "gold standard" in bone augmentation. Among them, autologous bone grafting is widely used in clinical practice due to its excellent osteogenic potential and stable bone augmentation effect. The key step in this technique is that after obtaining a whole piece of autologous bone from the donor site (such as the mandibular chin or mandibular ramus), it needs to be trimmed into a thin layer of bone with uniform thickness and matching shape according to the three-dimensional morphology and bone volume requirements of the recipient site.

[0003] Currently, this bone reshaping process relies entirely on the surgeon's experience and free hand operation, lacking the support of specialized instruments, and has the following significant technical defects and challenges: (1) Difficulty in holding bone fragments and poor operational safety: Autologous bone fragments are usually small in size, irregular in shape, and have a slippery surface, making them difficult to stabilize and fix during trimming. During trimming, doctors usually need to hold the bone fragments by hand or with the help of ordinary tissue forceps. Not only is the grip not secure, but it is also very easy for the fragments to slip off when the high-speed rotating saw blade is in operation, causing serious safety hazards, such as accidental finger injuries. At the same time, unstable grip can also easily cause the bone fragments to suddenly slip during cutting, resulting in the bone fragments falling off, cutting failure, or bone fragments breaking.

[0004] (2) Difficulty in controlling cutting precision and low utilization rate of bone fragments: Doctors rely solely on experience and visual observation for cutting, making it difficult to accurately control the thickness, parallelism, and geometry of bone fragments. This often results in uneven thickness of the cut bone fragments, and even accidental cutting or crushing of bone fragments during the trimming process due to operational deviations, causing a waste of valuable autologous bone material; sometimes, the bone fragments are even forced to be abandoned or re-harvested due to accidental damage, increasing the surgical trauma for patients.

[0005] (3) Lack of standardized tools and low surgical efficiency: Due to the lack of specialized bone clipping and guiding devices, doctors need to repeatedly position and adjust the bone for each cut. The whole process is time-consuming, which not only prolongs the operation time but also increases the time the bone is exposed outside the body, which may have an adverse effect on the activity of bone-forming cells.

[0006] In summary, in current oral implant bone augmentation surgery, the crucial "refining" step, from obtaining autologous bone blocks to preparing precise bone grafts for transplantation, heavily relies on the surgeon's personal skills and experience. There is a lack of specialized tools that can safely and stably hold the bone blocks and guide instruments for precise, parallel cutting.

[0007] Therefore, providing a specialized device for fixing and trimming bone blocks in oral implant autologous bone grafting, which has the functions of stable clamping, safety protection, precise guidance and controllable thickness, has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0008] The purpose of this invention is to provide a device for fixing and trimming autologous bone grafts in oral implantation, aiming to solve problems such as unstable bone graft clamping, insufficient cutting precision, low bone utilization, and low surgical efficiency in existing technologies. By using this specialized device during surgery, the surgeon can stably clamp the autologous bone graft, achieving precise cutting and trimming, thereby promoting the development of autologous bone transplantation surgery towards a safer, more standardized, and more precise direction.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows: This invention discloses an autologous bone block fixation and trimming device for oral implantation, comprising: a first clamping arm and a second clamping arm; the first clamping arm and the second clamping arm are hinged together by fasteners to form a scissor lever structure; The first clamping arm includes a first gripping part and a first clamping section, and the first clamping section is connected to a positioning frame; The second clamping arm includes a second gripping part and a second clamping section; the second clamping section is connected to a movable pressure plate; The positioning frame and the movable pressure plate are positioned opposite each other and together form a bone placement cavity for accommodating and fixing the autologous bone block.

[0010] In some embodiments of the present invention, the positioning frame is formed by a main positioning plate, a top positioning plate and an outer positioning plate fixedly connected together, and the three are perpendicular to each other in pairs; Preferably, the top positioning plate and the outer positioning plate constitute the top surface and outer wall of the positioning frame, respectively; the main positioning plate constitutes its inner wall and is arranged parallel to and opposite to the movable pressure plate.

[0011] In some embodiments of the present invention, the movable pressure plate includes a plate body and a silicone rubber layer disposed on its inner surface, and the movable pressure plate has through holes penetrating its plate body and silicone rubber layer; the inner surface of the main positioning plate facing the bone block is provided with a plurality of tiny cylindrical protrusions.

[0012] In some embodiments of the present invention, at least one cutting guide groove is provided on the top surface and the outer side wall of the positioning frame, and the inner edge of each guide groove is parallel to the plane where the top end of the cylindrical protrusion on the inner surface of the main positioning plate facing the bone block is located, and a fixed vertical distance is maintained between the two. Preferably, the vertical distance is 1.5 mm to define the target thickness of the bone fragment to be cut; Preferably, the width of the cutting guide groove is 0.5 mm, which is used to form a guiding fit with the standard disc saw blade to ensure the accuracy and stability of the cutting path.

[0013] In some embodiments of the present invention, an integrally connected composite guide window is provided on the inner sidewall and top surface of the positioning frame; the composite guide window is composed of an inverted T-shaped structural segment on the inner sidewall of the positioning frame and an auxiliary extension segment on the top surface; wherein, the inverted T-shaped structural segment includes a vertical main opening and a bottom horizontal flared opening connected to its bottom end; the auxiliary extension segment is an opening formed by the vertical main opening extending upward and penetrating to the top surface, and its shape and size are consistent with the vertical main opening; The vertical main opening is designed to allow and guide the saw blade of the disc saw through; The bottom flare is designed to allow the drive shaft of the disc saw to pass through, thus preventing interference between the drive shaft and the frame at the start and end positions of the cut.

[0014] In some embodiments of the present invention, the movable pressure plate is a rectangular planar pressure plate whose shape matches the outer contour of the positioning frame; when the first clamping arm and the second clamping arm are closed, the movable pressure plate fits tightly with the open end of the positioning frame, completely encapsulating the bone block in the bone placement cavity, thereby achieving stable clamping. Preferably, the movable pressure plate is provided with a bone screw guide window, which penetrates the plate body and silicone rubber layer of the movable pressure plate along the thickness direction. The minimum vertical distance between the hole wall of each bone screw guide window and the two adjacent sides of the movable pressure plate is 1.5mm.

[0015] In some embodiments of the present invention, the fastener is a cam handle structure, including an eccentric cam and an operating lever fixedly connected to the eccentric cam; When the operating lever is in the open position, the short-diameter end of the eccentric cam acts on the clamping surface, creating a gap between the positioning frame and the movable pressure plate to accommodate the bone block. When the operating lever is pressed down to the closed position, the long axis end of the eccentric cam rotates with the operating lever, driving the movable pressure plate to forcefully close and lock against the positioning frame. The cam mechanism also has a self-locking characteristic after passing the dead point.

[0016] The lever can be locked by pressing down with one hand, which is faster than the traditional screw turning method.

[0017] In some embodiments of the present invention, a first connecting portion is provided between the first gripping portion and the first clamping segment; a second connecting portion is provided between the second gripping portion and the second clamping segment; Preferably, fasteners are passed through the first connecting portion and the second connecting portion, and the first clamping arm and the second clamping arm are hinged together; Preferably, the front end of the first clamping segment is hinged to the positioning frame; Preferably, the front end of the second clamping section is hinged to the movable pressure plate; Preferably, the first clamping section and the first connecting part are connected by bolts; the first connecting part and the first gripping part are solidly connected. Preferably, the second clamping section and the second connecting part are bolted together; the second connecting part and the second gripping part are solidly connected.

[0018] In some embodiments of the present invention, both the first grip and the second grip are operating handles; The first grip section is equipped with a finger groove or ergonomic finger ring suitable for thumb grip. The second grip section has a groove or ergonomic ring suitable for the middle and ring fingers.

[0019] In some embodiments of the present invention, the inner contour of the first gripping part is a complex curved surface adapted to the anatomical shape of the thumb. Preferably, the curved surface includes a concave portion in the area corresponding to the thumb pad and a convex portion in the area corresponding to the thumb joint. The inner contour of the second gripping part is a complex curved surface adapted to the anatomical shape of the middle and ring fingers; preferably, the curved surface includes a recessed portion in the corresponding area of ​​the fingertip of the middle and ring fingers and a protruding portion in the corresponding area of ​​the finger joint.

[0020] Compared with the prior art, the present invention has the following beneficial effects: This invention is scientifically designed and ingeniously conceived, solving the problems of cumbersome operation, low efficiency, insufficient precision, and poor stability caused by the need to alternate between multiple simple tools in the traditional bone fragment preparation process. This invention adopts an integrated design, combining four core functions—stable clamping, anti-slip fixation, precise cutting guidance, and pre-positioning of bone screw holes—into a single handheld instrument, achieving a precise, efficient, and stable "one-stop" preparation from bone blocks to ready-to-use bone fragments.

[0021] This invention integrates clamping, fixing, cutting guidance, and drilling guidance functions into a single instrument body, replacing the traditional surgical procedure that requires the alternating use of multiple tools such as tissue forceps, rulers, hand saws, and drills, significantly improving the continuity and overall efficiency of surgical operations.

[0022] The composite guide window of this invention overcomes the technical bottleneck of traditional single-slot guide plates, where the drive shaft of the disc saw is blocked by the side wall of the guide plate when cutting large / wide bone blocks. This structure allows the saw blade and the shaft to pass synchronously and without interference, thereby achieving smooth, continuous, and full-length cutting of large bone blocks in one go, expanding the applicability of the device.

[0023] This invention integrates a bone screw guide window on the edge of the movable clamping plate, with its inner edge precisely set to be approximately 1.5 mm from the clamping surface. This system standardizes the pre-positioning of the bone screw holes, ensuring that the holes are automatically positioned at an ideal mechanical location approximately 1.5 mm from the edge of the bone fragment. This effectively avoids the hole position deviations, improper depths, and the resulting risks of unstable bone fragment fixation or splitting that may occur with freehand drilling.

[0024] This invention features a silicone rubber layer with micro-cylindrical protrusions on the clamping surfaces of the positioning frame and the movable pressure plate. This structure, while applying uniform compressive stress, significantly increases the static friction with the slippery bone block surface, achieving bidirectional active locking of the bone block. This fundamentally prevents minor displacement or rotation during high-speed cutting or drilling, providing a stable foundation for precision operations.

[0025] The grip portion of this invention features a multi-convex-concave curved surface design that conforms to the anatomical shape of the fingertips and knuckles, and connects to the front-end functional module via a standard interface and fasteners. This design not only improves operational comfort, control, and fatigue resistance, but also allows for the rapid replacement of different sizes of front-end clamping modules according to clinical needs, enhancing the flexibility and adaptability of the instrument.

[0026] Through the above-mentioned integrated and innovative design, this invention significantly improves the accuracy, efficiency, and operational stability of bone fragment preparation surgery, and has important clinical application value. Attached Figure Description

[0027] Appendix Figure 1 This is a schematic diagram of the dental implant autologous bone block fixation and trimming device of the present invention. Appendix Figure 2 Schematic diagram of the positioning frame and movable pressure plate structure Figure 1 ; Appendix Figure 3 Schematic diagram of the positioning frame and movable pressure plate structure Figure 2 ; Appendix Figure 4 A schematic diagram of the bone screw guide window structure on the movable pressure plate; Appendix Figure 5 This is a schematic diagram of a composite guide window structure; Appendix Figure 6 This is a schematic diagram of the fastener structure; Appendix Figure 7 This is a diagram illustrating the installation of fasteners.

[0028] The names corresponding to the reference numerals in the attached figures are: 1-First clamping arm, 11-First gripping part, 12-First connecting part, 13-First clamping section; 2-Second clamping arm, 21-Second gripping part, 22-Second connecting part, 23-Second clamping section; 3- Cylindrical protrusions; 4-Fastener, 41-Eccentric cam, 42-Operating lever; 5-Positioning frame, 51-Main positioning plate, 52-Top positioning plate, 53-Outer positioning plate; 6-Modible pressure plate, 61-Through hole; 7-Bone cavity placement, 8-Cutting guide groove, 9-Composite guide window, 10-Bone screw guide window. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments.

[0030] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1 As attached Figure 1 -Appendix Figure 7 As shown, the present invention discloses an autologous bone block fixation and trimming device for oral implantation, which includes: a first clamping arm 1 and a second clamping arm 2; the first clamping arm 1 and the second clamping arm 2 are hinged by fasteners 4 to form a scissor lever structure; The first clamping arm 1 includes a first gripping part 11 and a first clamping section 13, and the first clamping section 13 is connected to a positioning frame 5; The second clamping arm 2 includes a second gripping part 21 and a second clamping section 23; the second clamping section 23 is connected to a movable pressure plate 6; The positioning frame 5 and the movable pressure plate 6 are arranged opposite to each other and together form a bone placement cavity 7 for accommodating and fixing the autologous bone block.

[0032] The autologous bone block fixation and trimming device for oral implants in this embodiment securely accommodates the bone block through a dedicated bone placement cavity, replacing simple tools such as tissue forceps in traditional surgery. This significantly improves the stability of bone block fixation and the smoothness of surgical operation, effectively enhancing overall surgical efficiency.

[0033] Example 2 As attached Figure 1 -Appendix Figure 7As shown, the present invention discloses an autologous bone block fixation and trimming device for oral implantation, which includes: a first clamping arm 1 and a second clamping arm 2; the first clamping arm 1 and the second clamping arm 2 are hinged by fasteners 4 to form a scissor lever structure; The first clamping arm 1 includes a first gripping part 11 and a first clamping section 13, and the first clamping section 13 is connected to a positioning frame 5; The second clamping arm 2 includes a second gripping part 21 and a second clamping section 23; the second clamping section 23 is connected to a movable pressure plate 6; The positioning frame 5 and the movable pressure plate 6 are arranged opposite to each other and together form a bone placement cavity 7 for accommodating and fixing the autologous bone block.

[0034] The positioning frame 5 is formed by a main positioning plate 51, a top positioning plate 52 and an outer positioning plate 53 fixedly connected together, and the three are perpendicular to each other in pairs. The top positioning plate 52 and the outer positioning plate 53 respectively constitute the top surface and outer wall of the positioning frame 5; the main positioning plate 51 constitutes its inner wall and is arranged parallel to and opposite to the movable pressure plate 6.

[0035] The movable pressure plate 6 includes a plate body and a silicone rubber layer disposed on its inner surface. The movable pressure plate 6 has a through hole 61 that penetrates its plate body and silicone rubber layer. The main positioning plate 51 has multiple tiny cylindrical protrusions 3 on its inner surface facing the bone block.

[0036] This embodiment 2 provides a more preferred technical solution based on embodiment 1. Specifically, it defines the structure of the positioning frame 5. The positioning frame 5 adopts a mutually perpendicular structural design to achieve precise positioning of the bone block. Simultaneously, the inner surface of the movable pressure plate 6 facing the bone block is covered with a layer of silicone rubber, and the movable pressure plate 6 has through holes 61 penetrating its body and the silicone rubber layer; the inner surface of the main positioning plate 51 facing the bone block is provided with multiple tiny cylindrical protrusions 3. The silicone rubber layer can effectively buffer pressure and increase friction; the through holes 61 facilitate external water cooling and allow the surgeon to observe the positioning of the bone block. The cylindrical protrusions 3 on the inner surface of the main positioning plate 51 are made of the same metal material as the main positioning plate 51, mainly used to further enhance friction and improve the stability of fixation.

[0037] Example 3 As attached Figure 1 -Appendix Figure 7 As shown, the present invention discloses an autologous bone block fixation and trimming device for oral implantation, which includes: a first clamping arm 1 and a second clamping arm 2; the first clamping arm 1 and the second clamping arm 2 are hinged by fasteners 4 to form a scissor lever structure; The first clamping arm 1 includes a first gripping part 11 and a first clamping section 13, and the first clamping section 13 is connected to a positioning frame 5; The second clamping arm 2 includes a second gripping part 21 and a second clamping section 23; the second clamping section 23 is connected to a movable pressure plate 6; The positioning frame 5 and the movable pressure plate 6 are arranged opposite to each other and together form a bone placement cavity 7 for accommodating and fixing the autologous bone block.

[0038] The positioning frame 5 is formed by a main positioning plate 51, a top positioning plate 52 and an outer positioning plate 53 fixedly connected together, and the three are perpendicular to each other in pairs. The top positioning plate 52 and the outer positioning plate 53 respectively constitute the top surface and outer wall of the positioning frame 5; the main positioning plate 51 constitutes its inner wall and is arranged parallel to and opposite to the movable pressure plate 6.

[0039] The movable pressure plate 6 includes a plate body and a silicone rubber layer on its inner surface. The movable pressure plate 6 has through holes 61 that penetrate its plate body and silicone rubber layer. The main positioning plate 51 has multiple tiny cylindrical protrusions 3 on its inner surface facing the bone block.

[0040] At least one cutting guide groove 8 is provided on the top surface and the outer side wall of the positioning frame 5 respectively. The inner edge of each guide groove is parallel to the plane where the top end of the cylindrical protrusion 3 on the inner surface of the main positioning plate 51 facing the bone block is located, and the two maintain a fixed vertical distance. The vertical distance is 1.5 mm to limit the target thickness of the bone fragment to be cut; The cutting guide groove 8 has a width of 0.5mm and is used to form a guiding fit with the standard disc saw blade to ensure the accuracy and stability of the cutting path.

[0041] This embodiment 3 provides a more preferred technical solution based on embodiment 2. Specifically, at least one cutting guide groove 8 is provided on the top surface and outer side wall of the positioning frame 5. The inner edge of each guide groove is parallel to the plane containing the top of the cylindrical protrusion 3 on the inner surface of the main positioning plate 51 facing the bone block, and maintains a fixed vertical distance of 1.5 mm. This distance is the target thickness of the bone fragment to be cut. The width of the cutting guide groove 8 is 0.5 mm, forming a precise guiding fit with the standard disc saw blade, thereby ensuring the straightness, stability, and repeatability of the cutting path. By pre-setting the above-mentioned cutting guide groove, the doctor can accurately control the bone fragment thickness of 1.5 mm in one operation during surgery, and effectively ensure the stability and reliability of the cutting process.

[0042] Example 4 As attached Figure 1 -Appendix Figure 7As shown, the present invention discloses an autologous bone block fixation and trimming device for oral implantation, which includes: a first clamping arm 1 and a second clamping arm 2; the first clamping arm 1 and the second clamping arm 2 are hinged by fasteners 4 to form a scissor lever structure; The first clamping arm 1 includes a first gripping part 11 and a first clamping section 13, and the first clamping section 13 is connected to a positioning frame 5; The second clamping arm 2 includes a second gripping part 21 and a second clamping section 23; the second clamping section 23 is connected to a movable pressure plate 6; The positioning frame 5 and the movable pressure plate 6 are arranged opposite to each other and together form a bone placement cavity 7 for accommodating and fixing the autologous bone block.

[0043] The positioning frame 5 is formed by a main positioning plate 51, a top positioning plate 52 and an outer positioning plate 53 fixedly connected together, and the three are perpendicular to each other in pairs. The top positioning plate 52 and the outer positioning plate 53 respectively constitute the top surface and outer wall of the positioning frame 5; the main positioning plate 51 constitutes its inner wall and is arranged parallel to and opposite to the movable pressure plate 6.

[0044] The movable pressure plate 6 includes a plate body and a silicone rubber layer on its inner surface. The movable pressure plate 6 has through holes 61 that penetrate its plate body and silicone rubber layer. The main positioning plate 51 has multiple tiny cylindrical protrusions 3 on its inner surface facing the bone block.

[0045] The top surface and outer side wall of the positioning frame 5 are respectively provided with at least one cutting guide groove 8. The inner edge of each guide groove is parallel to the plane where the top of the cylindrical protrusion 3 on the inner surface of the main positioning plate 51 facing the bone block is located, and a fixed vertical distance is maintained between the two. The vertical distance is 1.5 mm to limit the target thickness of the bone fragment to be cut; The cutting guide groove 8 has a width of 0.5mm and is used to form a guiding fit with the standard disc saw blade to ensure the accuracy and stability of the cutting path.

[0046] The positioning frame 5 has an integrally connected composite guide window 9 on its inner sidewall and top surface. The composite guide window 9 is composed of an inverted T-shaped structural section on the inner sidewall of the positioning frame 5 and an auxiliary extension section on the top surface. The inverted T-shaped structural section includes a vertical main opening and a bottom horizontal flare connected to its bottom end. The auxiliary extension section is an opening formed by the vertical main opening extending upward and penetrating to the top surface, and its shape and size are consistent with the vertical main opening. This embodiment 4 provides a more preferred technical solution based on embodiment 3. Specifically, an integrally connected composite guide window 9 is provided on the inner sidewall and top surface of the positioning frame 5, and the composition of the composite guide window 9 is defined. The vertical section of the composite guide window 9 allows the saw blade of the disc saw to pass through, serving as a guide groove; the enlarged portions at both ends are used to accommodate and guide the drive shaft of the disc saw. This design effectively avoids the problem of the drive shaft interfering with and getting stuck on the sidewall of the positioning frame when cutting bone blocks with large width or height, thus supporting doctors to complete continuous cutting of the full length or height in one go without stopping or changing instruments.

[0047] Example 5 As attached Figure 1 -Appendix Figure 7 As shown, the present invention discloses an autologous bone block fixation and trimming device for oral implantation, which includes: a first clamping arm 1 and a second clamping arm 2; the first clamping arm 1 and the second clamping arm 2 are hinged by fasteners 4 to form a scissor lever structure; The first clamping arm 1 includes a first gripping part 11 and a first clamping section 13, and the first clamping section 13 is connected to a positioning frame 5; The second clamping arm 2 includes a second gripping part 21 and a second clamping section 23; the second clamping section 23 is connected to a movable pressure plate 6; The positioning frame 5 and the movable pressure plate 6 are arranged opposite to each other and together form a bone placement cavity 7 for accommodating and fixing the autologous bone block.

[0048] The positioning frame 5 is formed by a main positioning plate 51, a top positioning plate 52 and an outer positioning plate 53 fixedly connected together, and the three are perpendicular to each other in pairs. The top positioning plate 52 and the outer positioning plate 53 respectively constitute the top surface and outer wall of the positioning frame 5; the main positioning plate 51 constitutes its inner wall and is arranged parallel to and opposite to the movable pressure plate 6.

[0049] The movable pressure plate 6 includes a plate body and a silicone rubber layer on its inner surface. The movable pressure plate 6 has through holes 61 penetrating its plate body and silicone rubber layer. The inner surface of the main positioning plate 51 facing the bone block has multiple tiny cylindrical protrusions 3. The top surface and outer wall of the positioning frame 5 are respectively provided with at least one cutting guide groove 8. The inner edge of each guide groove is parallel to the plane where the top of the cylindrical protrusion 3 on the inner surface of the main positioning plate 51 facing the bone block is located, and a fixed vertical distance is maintained between the two. The vertical distance is 1.5 mm to limit the target thickness of the bone fragment to be cut; The cutting guide groove 8 has a width of 0.5mm and is used to form a guiding fit with the standard disc saw blade to ensure the accuracy and stability of the cutting path.

[0050] The positioning frame 5 has an integrally connected composite guide window 9 on its inner sidewall and top surface. The composite guide window 9 is composed of an inverted T-shaped structural section on the inner sidewall of the positioning frame 5 and an auxiliary extension section on the top surface. The inverted T-shaped structural section includes a vertical main opening and a bottom horizontal flare connected to its bottom end. The auxiliary extension section is an opening formed by the vertical main opening extending upward and penetrating to the top surface, and its shape and size are consistent with the vertical main opening. The movable pressure plate 6 is a rectangular planar pressure plate whose shape matches the outer contour of the positioning frame 5. When the first clamping arm 1 and the second clamping arm 2 are closed, the movable pressure plate 6 fits tightly with the open end of the positioning frame 5, completely encapsulating the bone block in the bone placement cavity 7 to achieve stable clamping. The movable pressure plate 6 is provided with a bone screw guide window 10. The bone screw guide window 10 penetrates the plate body and silicone rubber layer of the movable pressure plate 6 along the thickness direction. The minimum vertical distance between the hole wall of each bone screw guide window 10 and the two adjacent sides of the movable pressure plate 6 is 1.5mm.

[0051] This embodiment 5 provides a more preferred technical solution based on embodiment 4. Specifically, it defines the specific structure of the movable clamping plate 6 and its relationship with the positioning frame 5. This configuration ensures that the movable clamping plate 6 and the positioning frame 5 fit tightly together, effectively encapsulating the bone block and improving the stability and reliability of clamping. This embodiment also defines that the movable clamping plate 6 has a bone screw guide window 10, and the minimum vertical distance between the hole wall of each bone screw guide window 10 and the two adjacent sides of the movable clamping plate 6 is 1.5 mm. This design can ensure accurate implantation of bone screws while effectively avoiding damage to the edge structure of the bone cavity, significantly improving the safety and fixation stability of the surgery. Specifically, after the bone block is clamped and fixed, when the doctor drills through the guide window, the starting point of the formed bone screw hole will be automatically positioned at an ideal position about 1.5 mm from the edge of the bone block. This precise and consistent pre-drilling guidance mechanism provides a reliable guarantee for the subsequent implantation of micro bone screws, effectively avoiding the risks of positioning deviation, excessively deep or shallow holes that may be caused by manual operation.

[0052] Example 6 As attached Figure 1 -Appendix Figure 7 As shown, the present invention discloses an autologous bone block fixation and trimming device for oral implantation, which includes: a first clamping arm 1 and a second clamping arm 2; the first clamping arm 1 and the second clamping arm 2 are hinged by fasteners 4 to form a scissor lever structure; The first clamping arm 1 includes a first gripping part 11 and a first clamping section 13, and the first clamping section 13 is connected to a positioning frame 5; The second clamping arm 2 includes a second gripping part 21 and a second clamping section 23; the second clamping section 23 is connected to a movable pressure plate 6; The positioning frame 5 and the movable pressure plate 6 are arranged opposite to each other and together form a bone placement cavity 7 for accommodating and fixing the autologous bone block.

[0053] The positioning frame 5 is formed by a main positioning plate 51, a top positioning plate 52 and an outer positioning plate 53 fixedly connected together, and the three are perpendicular to each other in pairs. The top positioning plate 52 and the outer positioning plate 53 respectively constitute the top surface and outer wall of the positioning frame 5; the main positioning plate 51 constitutes its inner wall and is arranged parallel to and opposite to the movable pressure plate 6.

[0054] The movable pressure plate 6 includes a plate body and a silicone rubber layer on its inner surface. The movable pressure plate 6 has through holes 61 that penetrate its plate body and silicone rubber layer. The main positioning plate 51 has multiple tiny cylindrical protrusions 3 on its inner surface facing the bone block.

[0055] The top surface and outer side wall of the positioning frame 5 are respectively provided with at least one cutting guide groove 8. The inner edge of each guide groove is parallel to the plane where the top of the cylindrical protrusion 3 on the inner surface of the main positioning plate 51 facing the bone block is located, and a fixed vertical distance is maintained between the two. The vertical distance is 1.5 mm to limit the target thickness of the bone fragment to be cut; The cutting guide groove 8 has a width of 0.5mm and is used to form a guiding fit with the standard disc saw blade to ensure the accuracy and stability of the cutting path.

[0056] The positioning frame 5 has an integrally connected composite guide window 9 on its inner sidewall and top surface. The composite guide window 9 is composed of an inverted T-shaped structural section on the inner sidewall of the positioning frame 5 and an auxiliary extension section on the top surface. The inverted T-shaped structural section includes a vertical main opening and a bottom horizontal flare connected to its bottom end. The auxiliary extension section is an opening formed by the vertical main opening extending upward and penetrating to the top surface, and its shape and size are consistent with the vertical main opening. The movable pressure plate 6 is a rectangular planar pressure plate whose shape matches the outer contour of the positioning frame 5. When the first clamping arm 1 and the second clamping arm 2 are closed, the movable pressure plate 6 fits tightly with the open end of the positioning frame 5, completely encapsulating the bone block in the bone placement cavity 7 to achieve stable clamping. The movable pressure plate 6 is provided with a bone screw guide window 10. The bone screw guide window 10 penetrates the plate body and silicone rubber layer of the movable pressure plate 6 along the thickness direction. The minimum vertical distance between the hole wall of each bone screw guide window 10 and the two adjacent sides of the movable pressure plate 6 is 1.5mm.

[0057] The fastener 4 is a cam handle structure, including an eccentric cam 41 and an operating lever 42 fixedly connected to the eccentric cam 41; When the operating lever 42 is in the open position, the short-diameter end of the eccentric cam 41 acts on the pressing surface, so that a gap is formed between the positioning frame 5 and the movable pressure plate 6 to accommodate the bone block. When the operating lever 42 is pressed down to the closed position, the long diameter end of the eccentric cam 41 rotates with the operating lever 42, driving the movable pressure plate 6 to forcefully close and lock towards the positioning frame 5, and the cam mechanism has a self-locking characteristic after passing the dead point. The operating lever 42 can be locked by pressing down with one hand, and the operating speed is faster than the traditional screw turning method.

[0058] This embodiment 6 provides a more preferred technical solution based on embodiment 5. Specifically, it defines the specific composition of the fastener 4. The operating lever 42 can be locked by a single-handed pressing action, which is faster than the traditional screw tightening method. This design achieves rapid single-handed locking and reliable self-locking, greatly improving operational efficiency and ease of use. During surgery, the doctor does not need to use tools or cooperate with both hands; they can quickly and firmly lock the device simply by pressing down the handle. Thanks to the self-locking characteristic of the cam mechanism after passing the dead point, it can effectively prevent accidental loosening even under surgical vibration or external interference, ensuring that the clamping force remains stable and reliable throughout the operation. In addition, this structure cleverly converts a small hand operating force into a powerful linear locking force, allowing the silicone rubber anti-slip layer to fully adhere to and press against the bone block, thereby achieving excellent anti-slip effect and firm clamping performance.

[0059] Example 7 As attached Figure 1 -Appendix Figure 7 As shown, the present invention discloses an autologous bone block fixation and trimming device for oral implantation, which includes: a first clamping arm 1 and a second clamping arm 2; the first clamping arm 1 and the second clamping arm 2 are hinged by fasteners 4 to form a scissor lever structure; The first clamping arm 1 includes a first gripping part 11 and a first clamping section 13, and the first clamping section 13 is connected to a positioning frame 5; The second clamping arm 2 includes a second gripping part 21 and a second clamping section 23; the second clamping section 23 is connected to a movable pressure plate 6; The positioning frame 5 and the movable pressure plate 6 are arranged opposite to each other and together form a bone placement cavity 7 for accommodating and fixing the autologous bone block.

[0060] The positioning frame 5 is formed by a main positioning plate 51, a top positioning plate 52 and an outer positioning plate 53 fixedly connected together, and the three are perpendicular to each other in pairs. The top positioning plate 52 and the outer positioning plate 53 respectively constitute the top surface and outer wall of the positioning frame 5; the main positioning plate 51 constitutes its inner wall and is arranged parallel to and opposite to the movable pressure plate 6.

[0061] The movable pressure plate 6 includes a plate body and a silicone rubber layer on its inner surface. The movable pressure plate 6 has through holes 61 that penetrate its plate body and silicone rubber layer. The main positioning plate 51 has multiple tiny cylindrical protrusions 3 on its inner surface facing the bone block.

[0062] The top surface and outer side wall of the positioning frame 5 are respectively provided with at least one cutting guide groove 8. The inner edge of each guide groove is parallel to the plane where the top of the cylindrical protrusion 3 on the inner surface of the main positioning plate 51 facing the bone block is located, and a fixed vertical distance is maintained between the two. The vertical distance is 1.5 mm to limit the target thickness of the bone fragment to be cut; The cutting guide groove 8 has a width of 0.5mm and is used to form a guiding fit with the standard disc saw blade to ensure the accuracy and stability of the cutting path.

[0063] The positioning frame 5 has an integrally connected composite guide window 9 on its inner sidewall and top surface. The composite guide window 9 is composed of an inverted T-shaped structural section on the inner sidewall of the positioning frame 5 and an auxiliary extension section on the top surface. The inverted T-shaped structural section includes a vertical main opening and a bottom horizontal flare connected to its bottom end. The auxiliary extension section is an opening formed by the vertical main opening extending upward and penetrating to the top surface, and its shape and size are consistent with the vertical main opening. The movable pressure plate 6 is a rectangular planar pressure plate whose shape matches the outer contour of the positioning frame 5. When the first clamping arm 1 and the second clamping arm 2 are closed, the movable pressure plate 6 fits tightly with the open end of the positioning frame 5, completely encapsulating the bone block in the bone placement cavity 7 to achieve stable clamping. The movable pressure plate 6 is provided with a bone screw guide window 10. The bone screw guide window 10 penetrates the plate body and silicone rubber layer of the movable pressure plate 6 along the thickness direction. The minimum vertical distance between the hole wall of each bone screw guide window 10 and the two adjacent sides of the movable pressure plate 6 is 1.5mm.

[0064] The fastener 4 is a cam handle structure, including an eccentric cam 41 and an operating lever 42 fixedly connected to the eccentric cam 41; When the operating lever 42 is in the open position, the short-diameter end of the eccentric cam 41 acts on the pressing surface, so that a gap is formed between the positioning frame 5 and the movable pressure plate 6 to accommodate the bone block. When the operating lever 42 is pressed down to the closed position, the long diameter end of the eccentric cam 41 rotates with the operating lever 42, driving the movable pressure plate 6 to forcefully close and lock towards the positioning frame 5, and the cam mechanism has a self-locking characteristic after passing the dead point. The operating lever 42 can be locked by pressing down with one hand, and the operating speed is faster than the traditional screw turning method.

[0065] A first connecting portion 12 is provided between the first gripping portion 11 and the first clamping segment 13; a second connecting portion 22 is provided between the second gripping portion 21 and the second clamping segment 23; The fastener 4 passes through the first connecting part 12 and the second connecting part 22, and hinges the first clamping arm 1 and the second clamping arm 2. The front end of the first clamping section 13 is hinged to the positioning frame 5; The front end of the second clamping section 23 is hinged to the movable pressure plate 6; The first clamping section 13 and the first connecting part 12 are connected by bolts; the first connecting part 12 and the first gripping part 11 are solidly connected. The second clamping section 23 and the second connecting part 22 are connected by bolts; the second connecting part 22 and the second gripping part 21 are solidly connected.

[0066] This embodiment 7 provides a more preferred technical solution based on embodiment 6, specifying that a first connecting part 12 is provided between the first gripping part 11 and the first clamping section 13; a second connecting part 22 is provided between the second gripping part 21 and the second clamping section 23; and defining their mutual connection relationship. By solidly connecting the gripping parts and clamping sections of the first clamping arm 1 and the second clamping arm 2 respectively through connecting parts and bolted connections, and by using fasteners to hinge the two connecting parts, while cooperating with the hinged structure of the positioning frame and the movable pressure plate, the advantages of modular assembly, reliable connection, stable force, and easy disassembly and maintenance of the clamping device are achieved.

[0067] Example 8 As attached Figure 1 -Appendix Figure 7 As shown, the present invention discloses an autologous bone block fixation and trimming device for oral implantation, which includes: a first clamping arm 1 and a second clamping arm 2; the first clamping arm 1 and the second clamping arm 2 are hinged by fasteners 4 to form a scissor lever structure; The first clamping arm 1 includes a first gripping part 11 and a first clamping section 13, and the first clamping section 13 is connected to a positioning frame 5; The second clamping arm 2 includes a second gripping part 21 and a second clamping section 23; the second clamping section 23 is connected to a movable pressure plate 6; The positioning frame 5 and the movable pressure plate 6 are arranged opposite to each other and together form a bone placement cavity 7 for accommodating and fixing the autologous bone block.

[0068] The positioning frame 5 is formed by a main positioning plate 51, a top positioning plate 52 and an outer positioning plate 53 fixedly connected together, and the three are perpendicular to each other in pairs. The top positioning plate 52 and the outer positioning plate 53 respectively constitute the top surface and outer wall of the positioning frame 5; the main positioning plate 51 constitutes its inner wall and is arranged parallel to and opposite to the movable pressure plate 6.

[0069] The movable pressure plate 6 includes a plate body and a silicone rubber layer on its inner surface. The movable pressure plate 6 has a through hole 61 that penetrates its plate body and silicone rubber layer. The inner surface of the main positioning plate 51 facing the bone block has a plurality of tiny cylindrical protrusions 3. The top surface and the outer side wall of the positioning frame 5 are respectively provided with at least one cutting guide groove 8. The inner edge of each guide groove is parallel to the plane where the top of the cylindrical protrusion 3 on the inner surface of the main positioning plate 51 facing the bone block is located, and a fixed vertical distance is maintained between the two. The vertical distance is 1.5 mm to limit the target thickness of the bone fragment to be cut; The cutting guide groove 8 has a width of 0.5mm and is used to form a guiding fit with the standard disc saw blade to ensure the accuracy and stability of the cutting path.

[0070] The positioning frame 5 has an integrally connected composite guide window 9 on its inner sidewall and top surface. The composite guide window 9 is composed of an inverted T-shaped structural section on the inner sidewall of the positioning frame 5 and an auxiliary extension section on the top surface. The inverted T-shaped structural section includes a vertical main opening and a bottom horizontal flare connected to its bottom end. The auxiliary extension section is an opening formed by the vertical main opening extending upward and penetrating to the top surface, and its shape and size are consistent with the vertical main opening. The movable pressure plate 6 is a rectangular planar pressure plate whose shape matches the outer contour of the positioning frame 5. When the first clamping arm 1 and the second clamping arm 2 are closed, the movable pressure plate 6 fits tightly with the open end of the positioning frame 5, completely encapsulating the bone block in the bone placement cavity 7 to achieve stable clamping. The movable pressure plate 6 is provided with a bone screw guide window 10. The bone screw guide window 10 penetrates the plate body and silicone rubber layer of the movable pressure plate 6 along the thickness direction. The minimum vertical distance between the hole wall of each bone screw guide window 10 and the two adjacent sides of the movable pressure plate 6 is 1.5mm.

[0071] The fastener 4 is a cam handle structure, including an eccentric cam 41 and an operating lever 42 fixedly connected to the eccentric cam 41; When the operating lever 42 is in the open position, the short-diameter end of the eccentric cam 41 acts on the pressing surface, so that a gap is formed between the positioning frame 5 and the movable pressure plate 6 to accommodate the bone block. When the operating lever 42 is pressed down to the closed position, the long diameter end of the eccentric cam 41 rotates with the operating lever 42, driving the movable pressure plate 6 to forcefully close and lock towards the positioning frame 5, and the cam mechanism has a self-locking characteristic after passing the dead point. The operating lever 42 can be locked by pressing down with one hand, and the operating speed is faster than the traditional screw turning method.

[0072] A first connecting portion 12 is provided between the first gripping portion 11 and the first clamping segment 13; a second connecting portion 22 is provided between the second gripping portion 21 and the second clamping segment 23; The fastener 4 passes through the first connecting part 12 and the second connecting part 22, and hinges the first clamping arm 1 and the second clamping arm 2. The front end of the first clamping section 13 is hinged to the positioning frame 5; The front end of the second clamping section 23 is hinged to the movable pressure plate 6; The first clamping section 13 and the first connecting part 12 are connected by bolts; the first connecting part 12 and the first gripping part 11 are solidly connected. The second clamping section 23 and the second connecting part 22 are connected by bolts; the second connecting part 22 and the second gripping part 21 are solidly connected.

[0073] Both the first grip part 11 and the second grip part 21 are operating handles; wherein the first grip part (11) is provided with a finger groove or ergonomic finger ring suitable for thumb gripping, and the second grip part 21 is provided with a finger groove or ergonomic finger ring suitable for middle and ring finger gripping.

[0074] The inner contour of the first gripping part 11 is a complex curved surface adapted to the anatomical shape of the thumb. Preferably, the curved surface includes a concave part located in the area corresponding to the thumb pad and a protruding part located in the area corresponding to the thumb joint. The inner contour of the second gripping part 21 is a complex curved surface adapted to the anatomical shape of the middle and ring fingers; preferably, the curved surface includes a recessed part located in the corresponding area of ​​the fingertip of the middle and ring fingers and a protruding part located in the corresponding area of ​​the finger joint.

[0075] This embodiment 8 provides a more preferred technical solution based on embodiment 7. Specifically, it defines the specific structure of the first gripping part 11 and the second gripping part 21. This design significantly improves the ergonomic adaptability of the operating handle, greatly enhancing grip stability, operational comfort, and tactile feedback. Its unique concave-convex structure effectively prevents instruments from rotating or slipping in a wet surgical environment, ensuring that the surgeon applies force evenly and controls precisely, providing a solid and reliable foundation for delicate front-end operations.

[0076] The method of using the device of the present invention is as follows: Step 1: Device preparation and bone loading 1. Initial State: Open the operating lever 42. At this time, the short-diameter end of the eccentric cam 41 acts on the clamping surface, and the fastener 4 is in a relaxed state, creating a gap between the positioning frame 5 and the movable pressure plate 6 to accommodate the bone block. 2. Placing the Bone Block: The operator places one hand on the gripping part to open the clamping section. The other hand places the autologous bone block obtained from the donor area into the positioning frame 5, ensuring that the bone block is roughly located in the central area of ​​the positioning frame 5, with its cutting surface facing the preset guide groove 8.

[0077] Step 2: Bone clamping and locking 1. Close the pressure plate: Close the positioning frame 5 and the movable pressure plate 6 to initially confine the bone block within the bone placement cavity 7.

[0078] 2. Cam Locking: Pressing down the operating lever 42 with one hand rotates the long-diameter end of the eccentric cam 41, generating a strong linear locking force. This drives the movable pressure plate 6 to forcefully close and lock against the positioning frame 5, thereby fixing the bone block. During this process, the silicone rubber layer on the inner surface of the movable pressure plate 6 facing the bone block and the cylindrical protrusions 3 of the main positioning plate 51 press into the surface of the bone block from both sides, forming a two-way anti-slip lock to ensure that the bone block is stable and does not shift during subsequent operations.

[0079] Step 3: Precise cutting (slicing) of bone blocks (1) Cutting small bone blocks: Using a disc saw for oral implant surgery, align the high-speed rotating disc saw blade with and embed it into the cutting guide groove 8. Smoothly advance the saw blade along the direction of the cutting guide groove 8 to cut out a uniform bone fragment with a thickness of about 1.5mm (i.e., the distance from the inner edge of the guide groove to the inner wall of the frame).

[0080] (2) Full-length cutting of large bone blocks: If the bone block is large, the drive shaft of the disc saw may be blocked by the side wall of the frame. In this case, align the disc saw blade with and embed it into the cutting guide groove 8, and at the same time place the drive shaft into the vertical main opening of the composite guide window 9, and smoothly advance it along the vertical-horizontal section of the composite guide window 9. The saw blade and the shaft can pass through synchronously without interference, thereby achieving a one-time, continuous full-length (or full-height) cut of the bone block, avoiding the drawbacks of traditional guide plates that require segmented cutting or midway stopping.

[0081] Step 4: Pre-positioning of bone screw holes (optional step) If it is necessary to leave bone screw holes in the excised bone fragments for subsequent transplant fixation, this step can be performed before or after cutting: 1. Place the cut bone block at the inner edge of the positioning frame 5, close the positioning frame 5 and the movable pressure plate 6, press down the operating lever 42, and confirm that the eccentric cam 41 structure is locked and the bone block is fixed stably.

[0082] 2. Select a bone screw drill of appropriate diameter, insert the drill tip into the bone screw guide window 10 at the edge of the movable pressure plate 6, and drill a hole perpendicularly along the direction of the bone screw guide window 10. Since the minimum vertical distance between the hole wall of each bone screw guide window 10 and the two adjacent sides of the movable pressure plate 6 is precisely set to an ideal position of 1.5mm, the hole position is accurate and the depth is controllable.

[0083] 3. If it is necessary to drill holes on the remaining edges of the bone block, the position of the bone block needs to be changed and the above actions repeated.

[0084] Step 5: Remove the processed bone fragments 1. After completing all cutting and drilling operations, move the operating lever 42 upwards to the "open" position. The cam locking force is released, and the positioning frame 5 and the movable pressure plate 6 automatically loosen.

[0085] 2. Take out the prepared autologous bone fragments that are of uniform thickness and have pre-drilled holes for bone screws, and they can be used directly for transplantation and fixation in the recipient area.

[0086] Finally, it should be noted that the above embodiments are merely preferred embodiments of the present invention used to illustrate the technical solutions of the present invention, and are not intended to limit the invention, nor are they intended to limit the scope of the patent. Any modifications or refinements made to the main design concept and spirit of the present invention that are not of substantial significance, but which still solve the same technical problem as the present invention, should be included within the scope of protection of the present invention. In addition, the direct or indirect application of the technical solutions of the present invention to other related technical fields are similarly included within the scope of patent protection of the present invention.

Claims

1. A device for fixing and trimming autologous bone grafts for dental implants, characterized in that, include: First clamping arm (1) and second clamping arm (2); the first clamping arm (1) and the second clamping arm (2) are hinged by fasteners (4) to form a scissor lever structure; The first clamping arm (1) includes a first gripping part (11) and a first clamping section (13), and the first clamping section (13) is connected to a positioning frame (5); The second clamping arm (2) includes a second gripping part (21) and a second clamping section (23); the second clamping section (23) is connected to a movable pressure plate (6); The positioning frame (5) and the movable pressure plate (6) are arranged opposite to each other and together form a bone placement cavity (7) for accommodating and fixing the autologous bone block.

2. The device for fixing and trimming autologous bone grafts for dental implants according to claim 1, characterized in that, The positioning frame (5) is fixedly connected by a main positioning plate (51), a top positioning plate (52) and an outer positioning plate (53), and the three are perpendicular to each other in pairs; Preferably, the top positioning plate (52) and the outer positioning plate (53) respectively constitute the top surface and the outer side wall of the positioning frame (5); the main positioning plate (51) constitutes its inner side wall and is arranged parallel to and opposite to the movable pressure plate (6).

3. The device for fixing and trimming autologous bone grafts for dental implants according to claim 1, characterized in that, The movable pressure plate (6) includes a plate body and a silicone rubber layer on its inner surface. The movable pressure plate (6) has through holes (61) that penetrate its plate body and silicone rubber layer. The inner surface of the main positioning plate (51) facing the bone block has multiple tiny cylindrical protrusions (3).

4. The device for fixing and trimming autologous bone grafts for dental implants according to claim 1 or 2, characterized in that, At least one cutting guide groove (8) is provided on the top surface and the outer side wall of the positioning frame (5). The inner edge of each guide groove is parallel to the plane where the top of the cylindrical protrusion (3) on the inner surface of the main positioning plate (51) facing the bone block is located, and a fixed vertical distance is maintained between the two. Preferably, the vertical distance is 1.5 mm to define the target thickness of the bone fragment to be cut; Preferably, the width of the cutting guide groove (8) is 0.5 mm, which is used to form a guiding fit with the standard disc saw blade to ensure the accuracy and stability of the cutting path.

5. The device for fixing and trimming autologous bone grafts for dental implants according to claim 1, characterized in that, The positioning frame (5) has an integrally connected composite guide window (9) on its inner sidewall and top surface. The composite guide window (9) is composed of an inverted T-shaped structural section on the inner sidewall of the positioning frame (5) and an auxiliary extension section on the top surface. The inverted T-shaped structural section includes a vertical main opening and a bottom horizontal flare connected to its bottom end. The auxiliary extension section is an opening formed by the vertical main opening extending upward and penetrating to the top surface. Its shape and size are consistent with the vertical main opening.

6. The device for fixing and trimming autologous bone grafts for dental implants according to claim 1, characterized in that, The movable pressure plate (6) is a rectangular flat pressure plate, and its shape matches the outer contour of the positioning frame (5); Preferably, the movable pressure plate (6) is also provided with a bone screw guide window (10), and the minimum vertical distance between the hole wall of each bone screw guide window (10) and the two adjacent sides of the movable pressure plate (6) is 1.5mm.

7. The device for fixing and trimming autologous bone grafts for dental implants according to claim 1, characterized in that, The fastener (4) is a cam handle structure, including an eccentric cam (41) and an operating lever (42) fixedly connected to the eccentric cam (41).

8. The device for fixing and trimming autologous bone grafts for dental implants according to claim 1, characterized in that, A first connecting part (12) is provided between the first gripping part (11) and the first clamping section (13); a second connecting part (22) is provided between the second gripping part (21) and the second clamping section (23). Preferably, the fastener (4) passes through the first connecting part (12) and the second connecting part (22), and hinges the first clamping arm (1) and the second clamping arm (2); Preferably, the front end of the first clamping segment (13) is hinged to the positioning frame (5); Preferably, the front end of the second clamping section (23) is hinged to the movable pressure plate (6); Preferably, the first clamping section (13) and the first connecting part (12) are connected by bolts; the first connecting part (12) and the first gripping part (11) are solidly connected; Preferably, the second clamping section (23) and the second connecting part (22) are bolted together; the second connecting part (22) and the second gripping part (21) are solidly connected.

9. The device for fixing and trimming autologous bone grafts for dental implants according to claim 1, characterized in that, Both the first grip (11) and the second grip (21) are operating handles; The first gripping part (11) is provided with a finger groove or ergonomic finger ring suitable for thumb gripping. The second grip section (21) is provided with a groove or ergonomic ring suitable for the middle and ring fingers to grip.

10. The dental implant autologous bone block fixation and trimming device according to claim 8, characterized in that, The inner contour of the first gripping part (11) is a complex curved surface adapted to the anatomical shape of the thumb. Preferably, the curved surface includes a concave part located in the area corresponding to the thumb pad and a protruding part located in the area corresponding to the thumb joint. The inner contour of the second gripping part (21) is a complex curved surface adapted to the anatomical shape of the middle and ring fingers; preferably, the curved surface includes a recessed part located in the corresponding area of ​​the fingertip of the middle and ring fingers and a protruding part located in the corresponding area of ​​the finger joint.

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