Digital guide plate for depth-keeping bone trimming technology

Abstract

The utility model relates to the technical field of medical auxiliary devices, and discloses a digital guide plate for a depth-keeping bone finishing technology, which comprises a depth-keeping bone finishing guide plate, a depth-keeping guide column, an occlusion fixing plate and a connecting rod for connecting the depth-keeping bone finishing guide plate and the occlusion fixing plate, the occlusion fixing plate is accurately prepared through 3D printing according to the three-dimensional shape of teeth of a patient, a plurality of grooves are formed in the occlusion fixing plate, and the grooves are matched with the teeth of the patient in shape; at least four guide grooves are formed in the fixed-depth bone finishing guide plate, fixed-depth guide columns matched with the guide grooves are movably arranged in the guide grooves, and a specific bone finishing depth mark is arranged on each fixed-depth guide column; and at least two titanium nail holes are formed in the depth-keeping bone trimming guide plate. The whole abnormal bone surface can be positioned and trimmed by only one pair of guide plates, the depth setting column is guided by the depth setting hole to determine the bone trimming depth, real-time navigation in an operation is not needed, operation time and operation steps are greatly reduced, and operation wounds are reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary device technology, specifically to a digital guide plate for a fixed-depth bone trimming technique. Background Technology

[0002] Digital guides for depth-determining bone trimming are auxiliary tools used in orthopedic surgery to help surgeons improve precision and efficiency when trimming or reconstructing bones. By providing a stable, reusable guide structure, they help surgeons ensure that the cutting and trimming process conforms to a pre-planned path and shape during bone cutting, thereby reducing surgical errors. These guides are typically made of high-strength materials capable of withstanding various forces during the surgical procedure.

[0003] While traditional guide plates play a crucial role in orthopedic surgery, they also present several technical challenges. Traditional reshaping methods require multiple sets of guide plates due to the layer-by-layer bone cutting, necessitating real-time navigation technology to confirm whether the target bone position has been reached. This not only increases surgical complexity and time costs but, more importantly, introduces errors during guide plate switching and navigation. These errors can stem from various factors, including the manufacturing precision of the guide plate itself, operational errors during surgery, and individual differences in the patient's bone structure. Accumulated errors can lead to unsatisfactory surgical outcomes and even affect the patient's postoperative recovery and quality of life. In traditional surgery, to ensure the designated bone reshaping position is achieved, surgeons typically rely on intraoperative navigation systems to monitor and confirm real-time progress, improving surgical precision to some extent but also increasing complexity and equipment costs. Furthermore, intraoperative navigation systems themselves are susceptible to errors, such as signal interference and equipment calibration issues, all of which can affect the final surgical outcome. Traditional guide plates are mostly made of metal or plastic. These materials may be insufficient in terms of biocompatibility, strength and durability. If the precision control is not properly controlled during the manufacturing process, it may also affect the practicality and safety of the guide plate. Utility Model Content

[0004] In view of the above-mentioned shortcomings in the existing technology, the present invention provides a digital guide plate for fixed-depth bone trimming technology, which solves the problems of the large number of existing guide plates, large conversion errors, and reliance on intraoperative navigation.

[0005] In order to achieve the above-mentioned utility model objectives, the technical solution adopted by this utility model is as follows: a digital guide plate for fixed-depth bone trimming technology, including a fixed-depth bone trimming guide plate, a fixed-depth guide post, an occlusal fixation plate, and a connecting rod connecting the fixed-depth bone trimming guide plate and the occlusal fixation plate;

[0006] The occlusal fixation plate is precisely manufactured by 3D printing based on the three-dimensional shape of the patient's teeth. The occlusal fixation plate is set with multiple grooves, which match the shape of the patient's teeth to ensure the uniqueness of the groove's position after it is placed on the tooth.

[0007] The fixed-depth bone trimming guide plate is provided with at least four guide grooves, and a fixed-depth guide post matching the guide groove is movably installed in the guide groove. Each fixed-depth guide post is provided with a specific bone trimming depth mark. The fixed-depth bone trimming guide plate is provided with at least two titanium screw holes, and titanium screws are movably installed in the titanium screw holes.

[0008] The beneficial effects of this invention are as follows: This invention, through preoperative CT scanning, can accurately extract the three-dimensional morphology of the patient's teeth. Then, using 3D printing technology, an occlusal fixation plate matching the tooth shape is fabricated. The groove precisely matching the patient's tooth shape is placed on the patient's teeth, serving to fix the depth-fixed bone trimming guide plate. The occlusal fixation plate improves the stability and positioning accuracy of the depth-fixed bone trimming guide plate in the oral cavity, avoiding the problems of wobbling or displacement of the guide plate in traditional methods. The connecting rod, as the connecting component between the depth-fixed bone trimming guide plate and the occlusal fixation plate, effectively enhances the structural stability of the digital guide plate in depth-fixed bone trimming technology.

[0009] During operation, the depth of bone trimming is determined according to the preoperative surgical plan. Depth-determining guide posts are movable within the guide grooves of the depth-determining bone trimming guide plate. These guide posts are used to determine the bone trimming depth at that point during the procedure. The number of guide grooves depends on the area of ​​the bone to be trimmed. Corresponding depth marks are set on the depth-determining guide posts, and the depth corresponds to the depth of the bone to be trimmed. The depth-determining bone trimming guide plate is aligned and positioned using the surrounding normal bone tissue. After positioning, it is secured with titanium screws. Then, using a bone dynamics device, holes are drilled along the guide grooves to the predetermined depth on the bone surface to be trimmed. The depth-determining guide post is inserted into the guide groove to confirm that the target depth has been reached. This process is repeated until all depth-determining holes on the bone surface to be trimmed have reached the predetermined depth. After all steps are completed, the depth-determining bone trimming guide plate is removed. Then, the bone surface near the depth-determining holes is ground and trimmed using the bone dynamics device until the depth of the depth-determining holes is reached, i.e., the target bone surface is reached. Finally, the bone tissue between each depth-determining space is smoothed, completing the trimming process.

[0010] Furthermore, in the aforementioned digital guide plate for the fixed-depth bone trimming technique, the edges of the fixed-depth bone trimming guide plate and the occlusal fixation plate are curved.

[0011] The beneficial effects of adopting the above-mentioned further solutions are: the curved edges can better fit the patient's oral structure and reduce damage to the oral soft tissues caused by sharp edges.

[0012] Furthermore, the digital guide plate of the aforementioned fixed-depth bone trimming technology has a guide groove diameter of 2mm, a distance of 5mm-10mm between two adjacent guide grooves, and each guide groove corresponds to a specific bone trimming depth. Each bone trimming depth is obtained based on preoperative CT and target bone through virtual surgical simulation.

[0013] The beneficial effects of adopting the above-mentioned further solutions are as follows: In orthopedic surgery, the contact surface between the device and the bone tissue bears complex mechanical loads. A reasonable hole spacing design can enable a more uniform stress distribution and reduce local stress concentration.

[0014] Furthermore, the digital guide plate of the aforementioned depth-determining bone trimming technique has a shape consistent with the patient's jawbone morphology.

[0015] The benefits of adopting the above-mentioned further approach are as follows: each person's bone shape and the area that needs to be modified are different. Customizing the shape of the deep bone modification guide plate according to the shape and size of the patient's jawbone can better adapt to the anatomical structure of each patient. It can help surgeons to locate and fix the guide plate more quickly, thereby shortening the operation time and reducing the risk of infection.

[0016] Furthermore, the digital guide plate of the aforementioned depth-fixed bone trimming technology is specifically a photosensitive resin depth-fixed bone trimming guide plate, and the depth-fixed guide post is specifically a photosensitive resin depth-fixed guide post.

[0017] The beneficial effects of adopting the above-mentioned further solutions are as follows: photosensitive resin possesses excellent molding ability and fine processing characteristics. Through 3D printing technology, highly fitted surgical guides and guide posts can be rapidly fabricated according to the patient's specific anatomical structure, significantly improving the precision and efficiency of customization. The modified photosensitive resin exhibits good biocompatibility, reducing the risk of tissue rejection and postoperative inflammation. Furthermore, this material has a light weight and suitable mechanical strength, providing necessary support without placing excessive burden on bone tissue.

[0018] Furthermore, in the aforementioned digital guide plate for fixed-depth bone trimming technology, the depth markings on the fixed-depth guide post include multiple scale bars, with a 1mm interval between two adjacent scale bars.

[0019] The beneficial effects of this invention are as follows: Through precisely designed guide grooves and depth-fixing guide posts, this invention can accurately control the depth of bone trimming during surgery, ensuring that the morphology of the trimmed bone matches the predetermined appearance. This trimming method, which uses points as lines and guides with equal depth points and contour lines, effectively avoids errors caused by guide plate changes and repeated navigation in traditional surgery, significantly improving the accuracy and success rate of the surgery.

[0020] Compared to traditional multi-layered cutting and multiple navigation checks, this invention requires only one guide plate to complete the entire bone surface positioning process, eliminating the need for real-time intraoperative navigation and thus significantly reducing surgical time and procedures. By reducing the use of intraoperative navigation software and the number of bone-cutting guide plates, this technology helps lower medical costs. Simultaneously, its efficient surgical procedure also reduces patients' hospital stays and recovery time. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the digital guide plate for this fixed-depth bone trimming technique.

[0022] Figure 2 This is a schematic diagram of the structure of the digital guide plate for this fixed-depth bone trimming technique.

[0023] The components include: 1. Depth-fixed bone trimming guide plate, 2. Occlusal fixation plate, 3. Guide groove, 4. Depth-fixed guide post, 5. Depth marker, 6. Titanium screw hole, 7. Titanium screw, 8. Groove, and 9. Connecting rod. Detailed Implementation

[0024] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0025] In bone surgery, bone trimming is a delicate and crucial procedure, especially given the complex anatomy of the maxillofacial region. Traditional trimming methods require layer-by-layer cutting and multiple guides, which not only increases the complexity of the surgery but also introduces significant errors during guide switching. Furthermore, traditional methods necessitate real-time intraoperative navigation to ensure cutting accuracy, which undoubtedly prolongs the surgical time.

[0026] like Figures 1-2As shown, this embodiment provides a digital guide plate for depth-controlled bone trimming technology. This digital guide plate consists of two parts: a depth-controlled bone trimming guide plate 1 and an occlusal fixation plate 2, which are tightly connected by a connecting rod 9. The edges of both the depth-controlled bone trimming guide plate 1 and the occlusal fixation plate 2 are designed with arc shapes to adapt to the physiological structure of the maxillofacial region. The depth-controlled bone trimming guide plate 1 is provided with at least four guide grooves 3, within which depth-controlled guide posts 4 are movably installed. These depth-controlled guide posts 4 are marked with clear depth marks 5 to quickly and accurately determine the cutting depth during surgery. In this embodiment, the depth marks 5 on the depth-controlled guide posts 4 include multiple graduated strips, with adjacent graduated strips spaced 1 mm apart. Furthermore, the depth-controlled bone trimming guide plate 1 is also provided with titanium screw holes 6 for fixing the guide plate and ensuring its stability during surgery.

[0027] Preoperative CT scans allow for the extraction of the tooth's three-dimensional morphology, which is then digitally printed onto the occlusal fixation plate 2. This plate, digitally molded, precisely matches the patient's tooth shape, ensuring stability and unique placement even when in place. The fixation process of the occlusal fixation plate 2 fully utilizes the complex and unique shape of the tooth, which in turn guarantees the stability of the depth-determining bone trimming guide plate 1, ensuring the precision of the entire surgical procedure.

[0028] Based on the patient's CT or MRI imaging data, the area of ​​bone tissue requiring trimming is determined, and a guide plate, along with its guide grooves 3 and guide posts, are designed. Finally, 3D printing technology is used to convert the digital model into a physical guide plate. Material selection is crucial to ensuring the functionality and biocompatibility of the guide plate. In this embodiment, photosensitive resin is used as the main material for the depth-fixed bone trimming guide plate 1 and the depth-fixed guide posts 4. It has good moldability and biocompatibility, and its photocuring properties enable rapid 3D printing of complex structures, ensuring the precision and strength of the guide plate. In the design, the position and depth of the guide grooves 3 are ensured to match the depth of the bone tissue requiring trimming. A guide groove 3 is designed every 5mm-10mm on the depth-fixed bone trimming guide plate 1, with a diameter of 2mm. This design density ensures the accuracy of the surgery.

[0029] During the procedure, the depth-determining bone trimming guide plate 1 is first positioned and matched with nearby normal bone tissue, and then securely fixed with titanium screws 7. Next, a bone-powered device is used to drill holes in guide grooves 3 corresponding to the trimmed bone surface until the predetermined depth is reached. During this process, depth-determining guide posts 4 not only help quickly determine the drilling depth but also ensure the precision of the surgery. Each time a depth-determining hole reaches the predetermined depth, the corresponding depth-determining guide post 4 is inserted into the guide groove 3 to confirm that the target depth has been reached. This process is repeated until all depth-determining holes have reached the predetermined depth.

[0030] After drilling, remove the fixed-depth bone trimming guide plate 1 and trim along the holes again using a bone power device. During this process, maintain the smoothness and consistency of the entire bone surface. Once all trimming work is complete, further grind the bone tissue between the fixed-depth holes to ensure the smoothness of the entire bone surface and meet trimming requirements.

[0031] Compared to traditional trimming guides, this invention not only reduces the number of trimming guides used but also avoids the problem of prolonged operation time caused by repeated intraoperative navigation. By connecting points into lines and using contour points and contour lines for guidance, a rapid and accurate bone trimming effect is achieved.

[0032] The foregoing description illustrates and describes a preferred embodiment of the present invention. However, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the present invention through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A digital guide for a depth-specific bone modification technique, characterized in that, It includes a depth-fixed bone trimming guide plate (1), a depth-fixed guide post (4), an occlusal fixation plate (2), and a connecting rod (9) connecting the depth-fixed bone trimming guide plate (1) and the occlusal fixation plate (2); The occlusal fixation plate (2) is precisely manufactured by 3D printing according to the three-dimensional shape of the patient's teeth. The occlusal fixation plate (2) is provided with multiple grooves (8), which match the shape of the patient's teeth. The fixed-depth bone trimming guide plate (1) is provided with at least four guide grooves (3), and a fixed-depth guide post (4) matching the guide groove (3) is movably arranged in the guide groove (3). A specific bone trimming depth mark (5) is provided on each fixed-depth guide post (4). The fixed-depth bone trimming guide plate (1) is provided with at least two titanium screw holes (6), and a titanium screw (7) is movably arranged in the titanium screw hole (6).

2. The digitally-guided depth-bone modification technique's guide plate of claim 1, wherein, The edges of the fixed-depth bone trimming guide plate (1) and the occlusal fixation plate (2) are arc-shaped.

3. The digital guide plate for the fixed-depth bone trimming technology according to claim 1, characterized in that, The diameter of the guide groove (3) is 2mm, and the distance between two adjacent guide grooves (3) is 5mm-10mm.

4. The digitally-guided depth-bone modification technique's guide plate of claim 1, wherein, The shape of the depth-determining bone trimming guide plate (1) is consistent with the shape of the patient's jawbone.

5. The digitally-guided depth-bone modification technique's guide plate of claim 1, wherein, The depth-fixed bone trimming guide plate (1) is specifically a photosensitive resin depth-fixed bone trimming guide plate, and the depth-fixed guide post (4) is specifically a photosensitive resin depth-fixed guide post.

6. The digitally-guided depth-bone modification technique's guide plate of claim 5, wherein, The depth markings (5) on the depth guide post (4) include multiple scale bars, with a 1mm interval between two adjacent scale bars.

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