An osteotomy reconstruction bone positioning structure and method

Abstract

The present invention relates to the technical field of medical devices, and particularly relates to a positioning structure and method for osteotomy and bone reconstruction. The positioning structure for osteotomy and bone reconstruction includes a positioning assembly; the positioning assembly includes an upper jaw positioning guide plate, a lower jaw osteotomy guide plate, and a reconstructed bone positioning guide plate; the upper jaw positioning guide plate has an upper jaw occlusal surface, an upper N-shaped splicing mechanism, a plurality of positioning holes, and a plurality of fixing holes; the lower jaw osteotomy guide plate has a lower N-shaped splicing mechanism, a connection area, a lower jaw lower edge indication area, and an osteotomy guiding surface; the reconstructed bone positioning guide plate includes an indication guide plate and a plurality of C-shaped connecting rods; after the upper jaw positioning guide plate is fixed, the insertion and cooperation of the two lower jaw guide plates can guide all the key steps of the operation, without repeated disassembly and adjustment, and maintain accurate positioning and intermaxillary distance to facilitate subsequent implant restoration; based on the upper jaw dentition, the lower jaw osteotomy position and the reconstructed bone position can be positioned, and it can be applied to patients with tooth loosening or lower jaw dentition loss caused by various reasons.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a positioning structure and method for osteotomy and bone reconstruction. Background Art

[0002] Preoperatively using the patient's CT for digital design and pre-determining the appropriate osteotomy and reconstruction morphology are currently the best means to improve the effect of maxillofacial tumor resection and repair.

[0003] In the prior art, a 3D printed guide plate can transfer the preset plan in the computer to the real world, and this process is achieved by accurately positioning the osteotomy line through the osteotomy guide plate and the positioning guide plate indicating the reconstruction position. The dentition positioning or tooth-supported guide plate can determine the preset position through the unique hard tissue morphology (teeth), and using the dentition morphology adjacent to the defect area for positioning is a common application method.

[0004] However, by using the above methods, for patients with missing mandibular dentition or patients with loose surrounding teeth due to a large tumor, the accurate position cannot be determined through the mandibular teeth adjacent to the defect area. In addition, patients with large tumors usually have fractures, occlusal disorders, etc. before surgery and lack a reliable occlusion. Therefore, there is an urgent need for a structure that does not need to consider the mandibular teeth and locates the mandibular osteotomy position and the reconstructed bone position based on the maxillary dentition. Summary of the Invention

[0005] The purpose of the present invention is to provide a positioning structure and method for osteotomy and bone reconstruction, which locates the mandibular osteotomy position and the reconstructed bone position based on the maxillary dentition and can be applied to patients with loose teeth or missing mandibular dentition caused by various reasons.

[0006] To achieve the above purpose, in the first aspect, the present invention provides a positioning structure for osteotomy and bone reconstruction, including a positioning component;

[0007] The positioning component includes a maxillary positioning guide plate, a mandibular osteotomy guide plate, and a reconstructed bone positioning guide plate; the maxillary positioning guide plate has a maxillary occlusal surface, an upper n-shaped splicing mechanism, a plurality of positioning holes, and a plurality of fixing holes; the mandibular osteotomy guide plate has a lower n-shaped splicing mechanism, a connection area, a mandibular lower edge indication area, and an osteotomy guiding surface; the reconstructed bone positioning guide plate includes an indication guide plate and a plurality of c-shaped connecting rods; the plurality of c-shaped connecting rods are respectively fixedly connected to the indication guide plate and are respectively located on one side of the indication guide plate.

[0008] Among them, the thickness of the maxillary positioning guide plate is 3 - 4 mm.

[0009] Among them, the number of the positioning holes is 3 - 4.

[0010] Among them, the depth of the positioning hole is 2 mm, and the diameter is 3 mm.

[0011] Among them, the number of the fixing holes is 6 - 8.

[0012] Among them, the diameter of the fixing holes is 1 mm.

[0013] Among them, the thickness of the mandibular osteotomy guide plate is 3 - 4 mm.

[0014] Among them, the number of the C-shaped connecting rods is 3 - 4.

[0015] Among them, the diameter of the C-shaped connecting rods is 3 mm.

[0016] In a second aspect, the present invention also provides a positioning method for osteotomy and reconstruction of bone, and the specific steps include:

[0017] Fix the dental arch splint and multiple fixing holes of the maxillary positioning guide plate with steel wires to complete the fixation of the maxillary positioning guide plate;

[0018] Insert the lower N-shaped insertion mechanism of the mandibular osteotomy guide plate into the upper N-shaped insertion mechanism of the maxillary positioning guide plate. After stabilization, make the lower edge of the mandible consistent with the mandibular lower edge indication area of the mandibular osteotomy guide plate, and perform osteotomy according to the indication direction of the osteotomy guiding surface;

[0019] Remove the mandibular osteotomy guide plate, align and insert multiple C-shaped connecting rods of the reconstruction bone positioning guide plate into multiple positioning holes of the maxillary positioning guide plate, closely align the upper edge of the reconstruction bone segment with the indication guide plate, align the lower edge position of the reconstruction bone with the lower edge of the remaining mandible and fix it with a titanium plate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Expand the indications: Since the surface of the mandible is smooth and lacks a unique shape, the position of the guide plate usually needs to be determined by the surrounding dentition during osteotomy. However, patients with large tumors, loose adjacent teeth, or missing mandibular dentition cannot use the guide plate for positioning through the mandibular teeth. The present invention uses the maxillary dentition to cooperate with the guide plate insertion mechanism to accurately position the osteotomy position of the mandible. Compared with various existing mandibular guide plate osteotomy techniques, it can be applied to patients with tooth loosening or missing mandibular dentition caused by various reasons.

[0022] 2. The steps are simple and easy to promote and use: The present invention only includes the maxillary positioning guide plate, the mandibular osteotomy guide plate and the reconstruction bone positioning guide plate. After fixing the maxillary positioning guide plate, the insertion and cooperation of two mandibular guide plates (the mandibular osteotomy guide plate and the reconstruction bone positioning guide plate) can guide all the key steps of the operation, without repeated disassembly and adjustment, and maintain accurate positioning and intermaxillary distance for subsequent implant restoration. Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art.

[0024] Figure 1 It is a schematic structural diagram of an upper jaw positioning guide plate of a positioning structure for osteotomy and bone reconstruction of the present invention.

[0025] Figure 2 It is a schematic structural diagram of a mandibular osteotomy guide plate of a positioning structure for osteotomy and bone reconstruction of the present invention.

[0026] Figure 3 It is a schematic structural diagram of a reconstructed bone positioning guide plate of a positioning structure for osteotomy and bone reconstruction of the present invention.

[0027] Figure 4 It is a schematic structural diagram when the upper jaw positioning guide plate and the mandibular osteotomy guide plate of a positioning structure for osteotomy and bone reconstruction of the present invention are docked.

[0028] Figure 5 It is a schematic structural diagram when the upper jaw positioning guide plate and the reconstructed bone positioning guide plate of a positioning structure for osteotomy and bone reconstruction of the present invention are docked.

[0029] Figure 6 It is a flowchart of a positioning method for osteotomy and bone reconstruction of the present invention.

[0030] 101 - Upper jaw positioning guide plate, 102 - Mandibular osteotomy guide plate, 103 - Reconstructed bone positioning guide plate, 104 - Upper jaw occlusal surface, 105 - Upper n-shaped splicing mechanism, 106 - Positioning hole, 107 - Fixing hole, 108 - Lower n-shaped splicing mechanism, 109 - Connection area, 110 - Mandibular lower edge indication area, 111 - Osteotomy guiding surface, 112 - Indication guide plate, 113 - C-shaped connecting rod. Detailed implementation manners

[0031] Please refer to Figures 1-5 , wherein, Figure 1 It is a schematic structural diagram of an upper jaw positioning guide plate of a positioning structure for osteotomy and bone reconstruction of the present invention. Figure 2 It is a schematic structural diagram of a mandibular osteotomy guide plate of a positioning structure for osteotomy and bone reconstruction of the present invention. Figure 3 It is a schematic structural diagram of a reconstructed bone positioning guide plate of a positioning structure for osteotomy and bone reconstruction of the present invention. Figure 4 It is a schematic structural diagram when the upper jaw positioning guide plate and the mandibular osteotomy guide plate of a positioning structure for osteotomy and bone reconstruction of the present invention are docked. Figure 5 It is a schematic structural diagram when the upper jaw positioning guide plate and the reconstructed bone positioning guide plate of a positioning structure for osteotomy and bone reconstruction of the present invention are docked.

[0032] In a first aspect, the present invention provides a positioning structure for osteotomy and bone reconstruction, comprising a positioning assembly. The positioning assembly includes an upper jaw positioning guide plate 101, a lower jaw osteotomy guide plate 102, and a reconstructed bone positioning guide plate 103. The upper jaw positioning guide plate 101 has an upper jaw occlusal surface 104, an upper n-shaped insertion mechanism 105, a plurality of positioning holes 106, and a plurality of fixing holes 107. The lower jaw osteotomy guide plate 102 has a lower n-shaped insertion mechanism 108, a connection area 109, a lower jaw lower edge indication area 110, and an osteotomy guiding surface 111. The reconstructed bone positioning guide plate 103 includes an indication guide plate 112 and a plurality of C-shaped connecting rods 113. Through the foregoing solution, the lower jaw osteotomy position and the reconstructed bone position are positioned based on the upper jaw dentition, and it can be applied to patients with tooth loosening or lower jaw dentition loss caused by various reasons.

[0033] For this specific embodiment, the maxillary positioning guide plate 101 has a maxillary occlusal surface 104, an upper n-shaped plug-in mechanism 105, a plurality of positioning holes 106 and a plurality of fixing holes 107; the mandibular osteotomy guide plate 102 has a lower n-shaped plug-in mechanism 108, a connection area 109, a mandibular lower border indication area 110 and an osteotomy guiding surface 111; the reconstructed bone positioning guide plate 103 includes an indication guide plate 112 and a plurality of C-shaped connecting rods 113; the plurality of C-shaped connecting rods 113 are respectively fixedly connected to the indication guide plate 112 and are respectively located on one side of the indication guide plate 112. The maxillary occlusal surface 104 corresponds to the occlusal morphology of the maxillary dentition, and an upper n-shaped plug-in mechanism 105 is added to the labial and buccal sides corresponding to the mandibular osteotomy line; the lower n-shaped plug-in mechanism 108 corresponds to the upper n-shaped plug-in mechanism 105 in terms of structural form and can be fixedly inserted. The connection area 109 extends from the lower n-shaped plug-in mechanism 108 to the surface of the mandible and closely adheres to the bone surface, and extends downward to the mandibular lower border indication area 110. The mesiodistal length of the mandibular lower border indication area 110 is at least more than 3 cm. The osteotomy guiding surface 111 of the mandibular osteotomy guide plate 102 bulges 2-3 mm in height on the mesial side to indicate the direction of the osteotomy surface; during use, the dental arch splint is fixed to the plurality of fixing holes 107 of the maxillary positioning guide plate 101 with wires to complete the fixation of the maxillary positioning guide plate 101; the lower n-shaped plug-in mechanism 108 of the mandibular osteotomy guide plate 102 is inserted into the upper n-shaped plug-in mechanism 105 of the maxillary positioning guide plate 101. After stabilization, the mandibular lower border is aligned with the mandibular lower border indication area 110 of the mandibular osteotomy guide plate 102, and osteotomy is performed according to the direction indicated by the osteotomy guiding surface 111; the mandibular osteotomy guide plate 102 is removed, and the plurality of C-shaped connecting rods 113 of the reconstructed bone positioning guide plate 103 are inserted into the plurality of positioning holes 106 of the maxillary positioning guide plate 101 in alignment. The upper edge of the reconstructed bone segment is closely aligned with the indication guide plate 112, and the lower edge position of the reconstructed bone is aligned with the lower edge of the remaining mandible and fixed with a titanium plate; in the above manner, based on the maxillary dentition, the mandibular osteotomy position and the reconstructed bone position are positioned, and it can be applied to patients with tooth loosening or mandibular dentition loss caused by various reasons.

[0034] Among them, the thickness of the maxillary positioning guide plate 101 is 3-4 mm.

[0035] Among them, the number of the positioning holes 106 is 3-4. The positioning holes 106 are evenly distributed on the labial and buccal sides.

[0036] Among them, the depth of the positioning hole 106 is 2 mm, and the diameter is 3 mm.

[0037] Among them, the number of the fixing holes 107 is 6-8. The fixing holes 107 are evenly distributed on the edge of the maxillary occlusal surface 104.

[0038] The diameter of the fixing hole 107 is 1 mm. The fixing hole 107 passes through the maxillary positioning guide plate 101 .

[0039] Wherein, the thickness of the mandibular osteotomy guide plate 102 is 3-4 mm.

[0040] Wherein, the number of the C-shaped connecting rods 113 is 3-4.

[0041] Wherein, the diameter of the C-shaped connecting rod 113 is 3 mm.

[0042] The positioning structure for osteotomy and bone reconstruction described in the present invention collects CT scans and maxillary dentition scans of the patient during design, and matches the scans to the surgical files according to the computer design; when designing the maxillary positioning guide plate 101: the maxillary occlusal surface 104 is determined according to the occlusal surface morphology of the maxillary dentition, the maxillary positioning guide plate 101 has 3-4 positioning holes 106 on the labial and buccal sides for connecting the reconstructed bone positioning guide plate 103, 6-8 fixing holes 107 are designed on the edge of the maxillary occlusal surface 104 for wire ligation of the dental arch splint, and the maxillary positioning guide plate 101 is designed with an upper n-shaped structure corresponding to the osteotomy area for the lower The mandibular osteotomy guide plate 102 is inserted and fixed; when designing the mandibular osteotomy guide plate 102: the osteotomy area is designed according to the osteotomy line, the lower edge of the mandibular osteotomy guide plate 102 is flush with the lower edge of the mandible, and upward to the maxillary occlusal surface 104, and a lower N-shaped structure is designed on the upper edge of the osteotomy area of ​​the mandibular osteotomy guide plate 102 for insertion and fixation with the maxillary positioning guide plate 101; the reconstruction bone placement guide plate 103 is designed: the reconstruction bone placement guide plate 103 has 3-4 C-shaped connecting rods 113 that match the positioning holes 106 on the buccal side of the maxillary positioning jaw plate, and the indicator guide plate 112 is used to maintain the inter-maxillary distance and indicate the reconstruction direction.

[0043] The advantages of the positioning structure for osteotomy and bone reconstruction described in the present invention are:

[0044] 1. Expanded indications: Since the mandible has a smooth surface and lacks a unique shape, the surrounding dentition is usually required to determine the position of the guide plate during osteotomy. However, patients with huge tumors, loose adjacent teeth, and mandibular edentulous cannot use the guide plate by positioning the mandibular teeth. The present invention uses the maxillary dentition in conjunction with the guide plate splicing structure to accurately locate the mandibular osteotomy position. Compared with the existing mandibular guide plate osteotomy techniques, it can be applied to patients with loose teeth or mandibular edentulous due to various reasons.

[0045] The 2 steps are simple and easy to promote and use: The present invention only includes the maxillary positioning guide plate 101, the mandibular osteotomy guide plate 102 and the reconstructed bone positioning guide plate 103. After fixing the maxillary positioning guide plate 101, the key steps of all surgeries can be guided through the plug-in cooperation of the mandibular osteotomy guide plate 102 and the reconstructed bone positioning guide plate 103, without repeated disassembly and adjustment, and maintaining accurate positioning and intermaxillary distance to facilitate subsequent implant restoration.

[0046] Refer to Figure 6 , wherein, Figure 6 is a flowchart of a positioning method for osteotomy and reconstructed bone of the present invention.

[0047] In a second aspect, the present invention also provides a positioning method for osteotomy and reconstructed bone, and the specific steps include:

[0048] S1 Use wires to fix the dental arch splint to multiple fixing holes 107 of the maxillary positioning guide plate 101 to complete the fixation of the maxillary positioning guide plate 101;

[0049] S2 Insert the lower n-shaped plug-in mechanism 108 of the mandibular osteotomy guide plate 102 into the upper n-shaped plug-in mechanism 105 of the maxillary positioning guide plate 101. After stabilization, align the lower border of the mandible with the mandibular lower border indication area 110 of the mandibular osteotomy guide plate 102, and perform osteotomy according to the indication direction of the osteotomy guiding surface 111;

[0050] S3 Remove the mandibular osteotomy guide plate 102, align and insert multiple c-shaped connecting rods 113 of the reconstructed bone positioning guide plate 103 into multiple positioning holes 106 of the maxillary positioning guide plate 101, closely align the upper edge of the reconstructed bone segment with the indication guide plate 112, align the lower edge position of the reconstructed bone with the lower edge of the remaining mandible and fix it with a titanium plate.

[0051] The above-disclosed are only one or more preferred embodiments of the present application, and the scope of rights of the present application cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A positioning structure for osteotomy and bone reconstruction, characterized in that: including a positioning component; The positioning assembly includes a maxillary positioning guide plate, a mandibular osteotomy guide plate and a reconstructed bone placement guide plate; the maxillary positioning guide plate has a maxillary occlusal surface, an upper N-shaped splicing mechanism, a plurality of positioning holes and a plurality of fixing holes; the mandibular osteotomy guide plate has a lower N-shaped splicing mechanism, a connecting area, a mandibular lower edge indicating area and an osteotomy guide surface; the reconstructed bone placement guide plate includes an indicating guide plate and a plurality of C-shaped connecting rods; the plurality of C-shaped connecting rods are respectively fixedly connected to the indicating guide plate and are respectively located on one side of the indicating guide plate; The positioning method for osteotomy and bone reconstruction includes the following specific steps: S1 uses steel wire to fix the dental arch splint to the multiple fixing holes of the maxillary positioning guide plate to complete the fixation of the maxillary positioning guide plate; S2 inserts the lower n-shaped inserting mechanism of the mandibular osteotomy guide into the upper n-shaped inserting mechanism of the maxillary positioning guide, and after stabilization, the lower edge of the mandible is aligned with the lower edge indication area of ​​the mandibular osteotomy guide, and osteotomy is performed according to the indication direction of the osteotomy guide surface; S3 removes the mandibular osteotomy guide, inserts the multiple C-shaped connecting rods of the reconstruction bone positioning guide into the multiple positioning holes of the maxillary positioning guide, aligns the upper edge of the reconstruction bone segment with the indicator guide, aligns the lower edge of the reconstruction bone with the lower edge of the remaining mandibular bone and fixes it with a titanium plate.

2. A positioning structure for osteotomy and bone reconstruction as claimed in claim 1, characterized in that: The thickness of the maxillary positioning guide plate is 3-4 mm.

3. A positioning structure for osteotomy and bone reconstruction as claimed in claim 2, characterized in that: The number of the positioning holes is 3-4.

4. A positioning structure for osteotomy and bone reconstruction as claimed in claim 3, characterized in that: The depth of the positioning hole is 2 mm and the diameter is 3 mm.

5. The positioning structure for osteotomy and bone reconstruction according to claim 4, characterized in that: The number of the fixing holes is 6-8.

6. The positioning structure for osteotomy and bone reconstruction according to claim 5, characterized in that: The diameter of the fixing hole is 1 mm.

7. The positioning structure for osteotomy and bone reconstruction according to claim 6, characterized in that: The thickness of the mandibular osteotomy guide plate is 3-4 mm.

8. The positioning structure for osteotomy and bone reconstruction according to claim 7, characterized in that: The number of the C-shaped connecting rods is 3-4.

9. The positioning structure for osteotomy and bone reconstruction according to claim 8, characterized in that: The diameter of the C-shaped connecting rod is 3 mm.

Images