A transpterygoid surgery auxiliary positioning support

Abstract

The application discloses a transpterygoid operation auxiliary positioning support, which comprises a fixing part, a first connecting support, a suspension connecting assembly and a guide ring, three fixed fulcrums are arranged on the fixing part, and the three fixed fulcrums are arranged on a first fixed support plate, a second fixed support plate and a third fixed support plate respectively; the first connecting support is provided with two groups, one group is detachably connected between the third fixed support plate and the first fixed support plate, and the other group is detachably connected between the third fixed support plate and the second fixed support plate; the suspension connecting assembly is arranged between the second fixed support plate and the third fixed support plate, the suspension connecting assembly is further connected to the first fixed support plate, the guide ring is connected to the suspension connecting assembly, and an entry point is arranged between the second fixed support plate and the third fixed support plate. The absolute reference system is established through the three bone fixed fulcrums, and the path optimization is realized through the adjustable connecting mechanism, so that the accuracy is ensured, the necessary flexibility is reserved, the position deviation is reduced, and the operation safety is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of zygomatic implantation technology, specifically to a zygomatic implantation surgical auxiliary positioning bracket. Background Technology

[0002] Transzygomatic implant surgery is specifically designed for patients with severe maxillary bone atrophy. It achieves stable support by implanting an extra-long implant into the zygomatic bone, avoiding complex bone grafting surgery. Unlike traditional dental implants that rely on alveolar bone for support, transzygomatic implants use extra-long implants (typically 30-55mm, 3-4 times the length of conventional implants). These implants pass through the maxillary sinus from the alveolar ridge and are ultimately fixed within the zygomatic arch. The zygomatic arch, one of the strongest bones in the human body, provides extremely stable support for the implant, ensuring secure fixation of all teeth even in cases of near-complete maxillary bone resorption.

[0003] The core principle of transzygomatic implantation lies in bypassing the missing maxilla and utilizing the dense bone of the zygomatic bone to provide stable biomechanical support for the implant. It generally includes the following steps:

[0004] Preoperative assessment includes comprehensive CBCT 3D image analysis. This 3D imaging technology can acquire images of the entire dentition, bilateral temporomandibular joints, and lateral and anteroposterior views of the skull in a single procedure. Using CBCT data, surgeons can precisely measure the thickness, height, and density of the zygomatic bone, assess the morphology and health of the maxillary sinus, and identify important anatomical structures such as the infraorbital nerve and branches of the maxillary artery, thus avoiding surgical damage. Modern digital technology allows these image data to be imported into specialized software for 3D virtual surgical planning, simulating the optimal implant placement path and angle in advance.

[0005] Digital surgical guide design, based on CBCT data and oral scan results, uses computer-aided design (CAD) to create surgical navigation templates. This guide can precisely guide the implant placement position and angle, minimizing human error.

[0006] Anesthesia and positioning preparation: Develop an individualized anesthesia plan based on the patient's specific condition; use an opening device to maintain the surgical side opening and provide sufficient space for surgical procedures.

[0007] Surgical approach and exposure: An arc-shaped incision is made at the crest of the maxillary alveolar ridge; the length of the incision depends on the number of implants. The mucoperiosteal flap is carefully raised using a periosteal elevator to expose the anterolateral wall of the maxilla and the zygomatic maxillary spur area.

[0008] Implant path positioning and preparation: Based on the implantation path determined by preoperative CBCT analysis and digital planning, a specialized drill bit is used to gradually prepare the implantation channel. The preparation process must strictly adhere to the angles and depths planned in the three-dimensional plan. The initial positioning drill determines the implant entry point, and the pilot drill establishes the initial channel, pointing towards the thickest part of the zygomatic bone. The bone channel is gradually enlarged using drill bits with progressively increasing diameters to prepare suitable bone threads for implant placement. Modern navigation systems or real-time image monitoring can greatly improve drilling accuracy and avoid deviation from the predetermined path.

[0009] For implant placement, select an appropriate length transzygomatic implant and slowly insert it through the prepared channel using an implantation instrument; during the placement process, closely monitor the torque value and placement depth to ensure that the implant achieves sufficient initial stability;

[0010] Wound closure and immediate repair: After carefully rinsing the surgical wound and confirming that there is no active bleeding, absorbable sutures are used to suture the soft tissue.

[0011] In the implantation path positioning section, in order to detect and determine the angle and direction of the zygomatic bone implantation, a positioning bracket is needed to indicate the zygomatic bone implantation window position, the three-dimensional direction and angle of the preparation hole, etc., which helps the zygomatic bone implant to be safely and effectively implanted in the ideal position.

[0012] However, most existing positioning stents suffer from insufficient flexibility and inability to achieve multi-degree-of-freedom adjustment. Therefore, there is a need to design a new positioning stent for zygomatic transconjunctival surgery that can solve these problems. Summary of the Invention

[0013] This invention addresses the problems existing in the prior art by providing an auxiliary positioning bracket for zygomatic surgery.

[0014] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0015] A surgical positioning support for zygomatic transconjunctival surgery includes a fixation component, a first connecting bracket, a suspension connecting assembly, and a guide ring.

[0016] The fastener is provided with three fixing points, which are respectively installed on the first fixing plate, the second fixing plate and the third fixing plate;

[0017] The first connecting bracket has two sets, one set is detachably connected between the third fixed support plate and the first fixed support plate, and the other set is detachably connected between the third fixed support plate and the second fixed support plate; the suspension connecting assembly is provided between the second fixed support plate and the third fixed support plate, the suspension connecting assembly is also connected to the first fixed support plate, the guide ring is connected to the suspension connecting assembly, and an entry point is provided between the second fixed support plate and the third fixed support plate.

[0018] Furthermore, the first fixed support plate, the second fixed support plate, and the third fixed support plate are all V-shaped titanium plates, and the opening width of the V-shaped titanium plate is set to 8mm-10mm, and the vertical height is set to 6mm-8mm.

[0019] Furthermore, the first connecting bracket is detachably connected to the first fixed support plate, the second fixed support plate, and the third fixed support plate.

[0020] Furthermore, the detachable connection structure is a snap-fit ​​or latch.

[0021] Furthermore, the first connecting bracket includes a first telescopic part, a second telescopic part, and a first nut. The second telescopic part extends into the first telescopic part and is threadedly connected to the first telescopic part. The first nut is sleeved at the connection between the first telescopic part and the second telescopic part. When the length of the first telescopic part and the second telescopic part needs to be adjusted, the first nut is only threadedly connected to the first telescopic part. After the length of the first telescopic part and the second telescopic part is adjusted, the first nut is threadedly connected to both the first telescopic part and the second telescopic part.

[0022] Furthermore, the suspension connection assembly includes a second connecting bracket and a third connecting bracket. The second connecting bracket is connected between the second fixed support plate and the third fixed support plate, and the third connecting bracket is connected between the second connecting bracket and the first fixed support plate. The guide ring includes a first guide ring and a second guide ring. The first guide ring is connected to the second connecting bracket, and the second guide ring is connected to the third connecting bracket. The end of the first guide ring away from the second guide ring is the entry point, which is the implant entry point of the positioning drill.

[0023] Furthermore, the second connecting bracket includes a third telescopic part, a fourth telescopic part, and a second nut. The fourth telescopic part extends into the third telescopic part and is threadedly connected to the third telescopic part. The second nut is sleeved at the connection between the fourth telescopic part and the third telescopic part. When the length of the fourth telescopic part and the third telescopic part is adjusted, the second nut is only threadedly connected to the third telescopic part. After the length of the fourth telescopic part and the third telescopic part is adjusted, the second nut is threadedly connected to both the third telescopic part and the fourth telescopic part. The first guide ring is connected to the second nut.

[0024] Furthermore, the upper wall of the second nut is provided with a slide rail, which extends along the axial direction of the second nut. A slider is slidably connected inside the slide rail, and the upper wall of the slider is ball-hinged to the first guide ring.

[0025] Furthermore, the third connecting bracket includes a fifth telescopic part, a sixth telescopic part, and a third nut. The sixth telescopic part extends into the fifth telescopic part and is threadedly connected to the fifth telescopic part. The third nut is sleeved at the connection between the sixth telescopic part and the fifth telescopic part. When the length of the sixth telescopic part and the fifth telescopic part is adjusted, the third nut is only threadedly connected to the fifth telescopic part. After the length of the sixth telescopic part and the fifth telescopic part is adjusted, the third nut is threadedly connected to both the fifth telescopic part and the sixth telescopic part.

[0026] Furthermore, the third nut has a ball joint hinged to the second guide ring.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] This invention establishes an absolute reference system through three fixed fulcrums and optimizes the path through the first connecting bracket and the suspension connecting assembly, which ensures accuracy while retaining necessary flexibility, reduces positional deviation, and significantly improves surgical safety. Attached Figure Description

[0029] Figure 1 This is a top view of the overall structure of the present invention;

[0030] Figure 2 This is a front view of the second connecting bracket of the present invention;

[0031] Figure label:

[0032] 1. First fixed support plate; 2. Second fixed support plate; 3. Third fixed support plate; 4. First guide ring; 5. Second guide ring; 6. First connecting bracket; 61. First telescopic part; 62. Second telescopic part; 63. First nut; 7. Second connecting bracket; 71. Third telescopic part; 72. Fourth telescopic part; 73. Second nut; 74. Slider; 75. Slide rail; 8. Third connecting bracket; 81. Fifth telescopic part; 82. Sixth telescopic part; 83. Third nut. Detailed Implementation

[0033] The present invention will be further described and illustrated below with reference to the accompanying drawings and specific embodiments. The technical features of each embodiment of the present invention can be combined accordingly, provided that there is no mutual conflict.

[0034] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. Technical features in the various embodiments of the present invention can be combined accordingly without mutual conflict.

[0035] In the description of this invention, it should be understood that when an element is considered to be "connected" to another element, it can be a direct connection to the other element or an indirect connection, i.e., there is an intermediate element. Conversely, when an element is said to be "directly" connected to another element, there is no intermediate element.

[0036] In the description of this invention, it should be understood that the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include at least one of those features.

[0037] Terminology Explanation:

[0038] Intraoral fusion is a process that uses computer algorithms to generate a complete, accurate, and seamless three-dimensional digital model of the oral cavity by identifying common features, accurately aligning, and smoothly integrating local three-dimensional data collected multiple times and in segments by an intraoral scanner.

[0039] CBCT is an abbreviation for Cone Beam Computed Tomography, a three-dimensional medical imaging technology specifically used for the oral and maxillofacial region (especially in dentistry, otolaryngology, etc.).

[0040] Example

[0041] Combination Figure 1 and Figure 2As shown, this embodiment provides an auxiliary positioning bracket for zygomatic perforation surgery, which includes a fixing component, a first connecting bracket 6, a suspension connecting assembly, and a guide ring. The fixing component has three fixing points, designated as a first fixing point, a second fixing point, and a third fixing point. The first fixing point is located on a first fixing plate 1, the second fixing point is located on a second fixing plate 2, and the third fixing point is located on a third fixing plate 3. The first fixing plate 1, the second fixing plate 2, and the third fixing plate 3 are all V-shaped titanium plates. Each of the first fixing plate 1, the second fixing plate 2, and the third fixing plate 3 has screw holes for initial fixing. The first connecting bracket 6 is detachably connected between the first fixing plate 1 and the second fixing plate 2, and between the first fixing plate 1 and the third fixing plate 3. The suspension connecting assembly is detachably connected between the second fixing plate 2 and the third fixing plate 3. The suspension connecting assembly is also detachably connected to the first fixing plate 1. The guide ring is located on the suspension connecting assembly.

[0042] It should be noted that the pre-formed curvature of each V-shaped titanium plate matches the zygomatic arch. Furthermore, the opening width and vertical height of the V-shaped titanium plate are adaptively set according to the actual situation. Preferably, the opening width of the V-shaped titanium plate is set to 8mm-10mm, and the vertical height (the vertical line from the tip of the V-shape to the bottom) is set to 6mm-8mm. The screw hole diameter is preferably set to 1.5mm, which can accommodate bone screws or minimally invasive anchor screws, playing a role in initial fixation. The positions of these three fixation fulcrums are determined based on preoperative CBCT analysis and digital planning. It should be noted that these three fixation fulcrums are set independently of each other.

[0043] The first connecting bracket 6 is provided in two sets. One set is connected between the first fixed support plate 1 and the second fixed support plate 2, and the other set is connected between the second fixed support plate 2 and the third fixed support plate 3. Preferably, the first connecting bracket 6 is a spiral telescopic arm structure, which can adjust the length by a rotatable screw and tighten it by a nut at the end of the screw. Furthermore, the first connecting bracket 6 includes a first telescopic part 61, a second telescopic part 62, and a first nut 63. The second telescopic part 62 extends into the first telescopic part 61 and is threadedly connected to the first telescopic part 61. The first nut 63 is sleeved at the connection between the first telescopic part 61 and the second telescopic part 62. The first nut 63 is threadedly connected to both the first telescopic part 61 and the second telescopic part 62. When the length of the first telescopic part 61 and the second telescopic part 62 needs to be adjusted, the first nut 63 is separated from the second telescopic part 62. After the length of the first telescopic part 61 and the second telescopic part 62 is adjusted, the first nut 63 is threadedly connected to the first telescopic part 61 and the second telescopic part 62. At this time, the first telescopic part 61 and the second telescopic part 62 cannot be extended or retracted.

[0044] For the first connecting bracket 6 connected between the first fixed support plate 1 and the second fixed support plate 2, the end of the first telescopic part 61 away from the second telescopic part 62 is rotatably connected to the side wall of the first fixed support plate 1 by a quick-release buckle or lock, and the end of the second telescopic part 62 away from the first telescopic part 61 is rotatably connected to the side wall of the second fixed support plate 2 by a quick-release buckle or lock. For the first connecting bracket 6 connected between the first fixed support plate 1 and the third fixed support plate 3, the end of the first telescopic part 61 away from the second telescopic part 62 is rotatably connected to the side wall of the first fixed support plate 1 by a quick-release buckle or lock, and the end of the second telescopic part 62 away from the first telescopic part 61 is rotatably connected to the side wall of the third fixed support plate 3 by a quick-release buckle or lock. It should be noted that the above-mentioned buckles or locks are existing structures, and as long as the connection can be achieved, they will not be described in detail here.

[0045] The suspension connection assembly includes a second connecting bracket 7 and a third connecting bracket 8. The second connecting bracket 7 is connected between the second fixed support plate 2 and the third fixed support plate 3, and the third connecting bracket 8 is connected between the second connecting bracket 7 and the first fixed support plate 1. The guide ring includes a first guide ring 4 and a second guide ring 5. The first guide ring 4 is connected to the second connecting bracket 7, and the second guide ring 5 is connected to the third connecting bracket 8. The end of the first guide ring 4 away from the second guide ring 5 is the entry point. This entry point is the implant entry point of the positioning drill. It is generally a ring structure of a standardized guide tube in the field, which can accurately locate the implant entry position and is fully matched with preoperative CBCT analysis and digitization.

[0046] The second connecting bracket 7 includes a third telescopic part 71, a fourth telescopic part 72, a second nut 73, a slider 74, and a slide rail 75. The fourth telescopic part 72 extends into the third telescopic part 71 and is threadedly connected to the third telescopic part 71. The second nut 73 is sleeved at the connection between the fourth telescopic part 72 and the third telescopic part 71. When the length of the fourth telescopic part 72 and the third telescopic part 71 is adjusted, the second nut 73 is threadedly connected only to the third telescopic part 71. After the length of the fourth telescopic part 72 and the third telescopic part 71 is adjusted, the second nut 73 is threadedly connected to both the third telescopic part 71 and the fourth telescopic part 72, so that the positions of the fourth telescopic part 72 and the third telescopic part 71 are relatively fixed and cannot be adjusted in length. The upper wall of the second nut 73 is provided with a slide rail 75, which extends along the axial direction of the second nut 73. The slider 74 is slidably connected inside the slide rail 75. The upper wall of the slider 74 is ball-jointed with a first guide ring 4, and the axial direction of the first guide ring 4 is oriented towards the first fixed support plate 1.

[0047] The third connecting bracket 8 includes a fifth telescopic part 81, a sixth telescopic part 82, and a third nut 83. The sixth telescopic part 82 extends into the fifth telescopic part 81 and is threadedly connected to the fifth telescopic part 81. The third nut 83 is sleeved at the connection between the sixth telescopic part 82 and the fifth telescopic part 81. When the length of the sixth telescopic part 82 and the fifth telescopic part 81 is adjusted, the third nut 83 is only threadedly connected to the fifth telescopic part 81. After the length of the sixth telescopic part 82 and the fifth telescopic part 81 is adjusted, the third nut 83 is threadedly connected to both the fifth telescopic part 81 and the sixth telescopic part 82, so that the positions of the fifth telescopic part 81 and the sixth telescopic part 82 are relatively fixed and cannot be adjusted in length. The second guide ring 5 is hinged to the wall ball on the third nut 83. The axial direction of the second guide ring 5 is set towards the first fixed support plate 1.

[0048] The first guide ring 4 and the second nut 73 can rotate freely in three-dimensional space, as can the second guide ring 5 and the third nut 83, allowing for multi-angle adjustment. The second guide ring 5 is precisely suspended inside the window position, which is located within the area formed by the connection of the three fixed support points. It should be noted that the position and angle of the first guide ring 4 and the second guide ring 5 are adjustable. After installation, the entry point, the axis of the first guide ring 4, the axis of the second guide ring 5, and the first fixed support point are aligned, forming an implantation channel. A special drill bit is inserted from the entry point, guiding the zygomatic bone implantation in the correct direction.

[0049] The working principle of this structure is as follows:

[0050] Preoperatively, a combination of CBCT and intraoral scanning was used to automatically calculate the optimal passage through the zygomatic bone, maxillary sinus, and alveolar ridge. During the procedure, after creating a window in the zygomatic bone, the first fixation plate 1, the second fixation plate 2, and the third fixation plate 3 were fixed to three fixed points on the zygomatic arch using three screws. The three fixed points, when connected in pairs, form a triangular distribution, creating a stable spatial reference system. The first connecting bracket 6 was installed, and its telescopic arm was adjusted. The second connecting bracket 7 was installed, and the entry point was adjusted to precisely locate the implant entry position, forming a stable support structure. The second guide ring 5 was suspended, and its position was adjusted to dynamically calibrate the guiding path (at this time, the first guide ring 4 and the second guide ring 5 were aligned), forming a guide channel with the entry point, the first guide ring 4, the second guide ring 5, and the first fixation plate 1 forming a straight line. Following the guide channel, the drill bit passed through the guide ring and the zygomatic bone sequentially, with torque and depth monitored in real time throughout the process. After completion, the entire support structure was removed, and the implant was inserted.

[0051] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A positioning support for zygomatic transconjunctival surgery, characterized in that, Includes fasteners, a first connecting bracket, a suspension connecting assembly, and guide rings. The fastener is provided with three fixing points, which are respectively installed on the first fixing plate, the second fixing plate and the third fixing plate; The first connecting bracket has two sets, one set is detachably connected between the third fixed support plate and the first fixed support plate, and the other set is detachably connected between the first fixed support plate and the second fixed support plate; the suspension connecting assembly is provided between the second fixed support plate and the third fixed support plate, the suspension connecting assembly is also connected to the first fixed support plate, the guide ring is connected to the suspension connecting assembly, and an entry point is provided between the second fixed support plate and the third fixed support plate; The suspension connection assembly includes a second connecting bracket and a third connecting bracket. The second connecting bracket is connected between the second fixed support plate and the third fixed support plate, and the third connecting bracket is connected between the second connecting bracket and the first fixed support plate. The guide ring includes a first guide ring and a second guide ring. The first guide ring is connected to the second connecting bracket, and the second guide ring is connected to the third connecting bracket. The end of the first guide ring away from the second guide ring is the entry point, which is the implant entry point of the positioning drill. The entry point, the first guide ring, the second guide ring, and the first fixed support plate form a straight guide channel.

2. The zygomatic implantation surgical auxiliary positioning bracket according to claim 1, characterized in that, The first fixed support plate, the second fixed support plate and the third fixed support plate are all V-shaped titanium plates, and the opening width of the V-shaped titanium plates is set to 8mm-10mm and the vertical height is set to 6mm-8mm.

3. The zygomatic implantation surgical auxiliary positioning bracket according to claim 1, characterized in that, The first connecting bracket is detachably connected to the first fixed support plate, the second fixed support plate, and the third fixed support plate.

4. The zygomatic implantation surgical auxiliary positioning bracket according to claim 3, characterized in that, The detachable connection structure is a snap-fit ​​or a latch.

5. A zygomatic implantation surgical auxiliary positioning bracket according to claim 3 or 4, characterized in that, The first connecting bracket includes a first telescopic part, a second telescopic part, and a first nut. The second telescopic part extends into the interior of the first telescopic part and is threadedly connected to the first telescopic part. The first nut is sleeved at the connection between the first telescopic part and the second telescopic part. When the lengths of the first telescopic part and the second telescopic part need to be adjusted, the first nut is only threadedly connected to the first telescopic part; after the lengths of the first telescopic part and the second telescopic part are adjusted, the first nut is threadedly connected to both the first telescopic part and the second telescopic part.

6. The zygomatic implantation surgical auxiliary positioning bracket according to claim 1, characterized in that, The second connecting bracket includes a third telescopic part, a fourth telescopic part, and a second nut. The fourth telescopic part extends into the third telescopic part and is threadedly connected to the third telescopic part. The second nut is sleeved at the connection between the fourth telescopic part and the third telescopic part. When the length of the fourth telescopic part and the third telescopic part is adjusted, the second nut is only threadedly connected to the third telescopic part. After the length of the fourth telescopic part and the third telescopic part is adjusted, the second nut is threadedly connected to both the third telescopic part and the fourth telescopic part. The first guide ring is connected to the second nut.

7. The zygomatic implantation surgical auxiliary positioning bracket according to claim 6, characterized in that, The upper wall of the second nut is provided with a slide rail, which extends along the axial direction of the second nut. A slider is slidably connected inside the slide rail, and the upper wall of the slider is ball-jointed to the first guide ring.

8. The zygomatic implantation surgical auxiliary positioning bracket according to claim 1, characterized in that, The third connecting bracket includes a fifth telescopic part, a sixth telescopic part, and a third nut. The sixth telescopic part extends into the fifth telescopic part and is threadedly connected to the fifth telescopic part. The third nut is sleeved at the connection between the sixth telescopic part and the fifth telescopic part. When the length of the sixth telescopic part and the fifth telescopic part is adjusted, the third nut is only threadedly connected to the fifth telescopic part. After the length of the sixth telescopic part and the fifth telescopic part is adjusted, the third nut is threadedly connected to both the fifth telescopic part and the sixth telescopic part.

9. The zygomatic implantation surgical auxiliary positioning bracket according to claim 8, characterized in that, The third nut has a ball joint that is hinged to the second guide ring.

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