CN210903511U

CN210903511U - Mandible reconstruction bracket

Info

Publication number: CN210903511U
Application number: CN201921497725.0U
Authority: CN
Inventors: 刘剑楠; 张陈平; 韩婧; 周子疌
Original assignee: Ninth Peoples Hospital Shanghai Jiaotong University School of Medicine
Current assignee: Ninth Peoples Hospital Shanghai Jiaotong University School of Medicine
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-07-03
Anticipated expiration: 2029-09-10

Abstract

The utility model discloses a mandible reconstruction bracket which is of an irregular structure and comprises a first cross section and a second cross section; wherein the oblique angle between the first cross section and the second cross section is 30-60 degrees; at least one first nail hole is respectively arranged on two sides of the first cross section, penetrates through the first cross section and the second cross section and is used for fixing the mandible reconstruction bracket on a first target object; the first cross section is provided with at least one second nail hole for fixing the mandible reconstruction bracket on a second target object. The utility model discloses a mandible is rebuild support can rebuild the mandible through compound vascularization bone grafting's mode, can effectively reduce the emergence of serious complications such as infection, rejection, stress shielding that the mandible leads to is rebuild to full foreign material.

Description

Mandible reconstruction bracket

Technical Field

The utility model relates to an oral cavity jaw face restores and rebuilds technical field, especially relates to a mandible rebuilds support.

Background

Vascularized autologous bone transplantation: at present, the method is mostly adopted for mandible reconstruction, and mainly comprises fibula, ilium and the like. However, the fibula has insufficient vertical height, which makes it difficult to simultaneously complete tooth implantation, and the iliac bone has insufficient horizontal length, which cannot be used for a wide range of mandibular defects across the midline. In some groups, the vertical bone mass is increased by using fibula double folding, Onlay bone grafting or bone forming traction and other modes, but the method not only increases the trauma of a supply area, but also improves the operation difficulty and the treatment period and increases the pain of a patient.

Total heterogeneous material reconstruction of mandible: as 3D printing technology becomes mature, the methods for applying the fully heterogeneous prosthesis to bone reconstruction are diversified, and titanium has gained wide attention as an element with the best biocompatibility. However, no matter the excellent physical and chemical properties of various materials, or the pure blue fire of the 3D printing technology, the fate that the implant infection and exposure after the mandibular reconstruction of the fully heterogeneous material are finally removed cannot be avoided. The main reasons are that the oral cavity is a bacterial environment (type II wound), the oral mucosa is thin, the saliva leakage is caused by the fact that the tight suture of soft tissues cannot be carried out, and the rejection infection is caused by the fact that the fully heterogeneous prosthesis has no anti-infection capacity. Meanwhile, the design of the heterogeneous prosthesis does not take into account the biomechanical state of the mandible, and the stress shielding phenomenon is obvious under the action of strong chewing force, so that peripheral bone absorption is caused, and the titanium nails are loosened and fall off.

Therefore, it is desirable to provide a mandible reconstruction bracket to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mandible rebuilds support, when accorded with the biomechanics of mandible and distribute, still can guide the position of transplanting bone that the mandible rebuilds support top is taken one's place, rebuilds mandible jointly, replaces defective mandible. The reconstructed mandible has good anti-infection performance and is beneficial to dental implantation. Use the utility model discloses a support can reduce stress and shelter from and the bone absorption that leads to, and then reduces the emergence of complications such as bone fracture of transplanting.

In order to achieve the above object, the present invention provides a mandible reconstruction bracket, which has an irregular structure and comprises a first cross section and a second cross section; wherein the oblique angle between the first cross-section and the second cross-section is 30 to 60 degrees; at least one first nail hole is respectively arranged on two sides of the first cross section, penetrates through the first cross section and the second cross section and is used for fixing the mandible reconstruction bracket on a first target object; the first cross section is provided with at least one second nail hole for fixing the mandible reconstruction bracket on a second target object.

Further, the first section further comprises a hollow design area, and the hollow design area is provided with at least one hollow hole so as to facilitate the attachment of mandible hyoglossus, masseter muscle and other jaw lifting and jaw lowering muscle groups and recover the power of mandible.

Further, the first target object is a mandible stump.

Further, the second target is a bone graft.

Further, be equipped with on the mandible rebuild the support with the medial surface of the lower extreme laminating of transplanting the bone is favorable to the mandible rebuild the support with the full contact of transplanting the bone.

Further, the lower margin of the mandible reconstruction frame conforms to the anatomical contour of the lower margin of the mandible.

Furthermore, the edge of the mandible reconstruction bracket is designed to be in a round angle shape, so that the damage to surrounding soft tissues caused by over sharp is avoided.

Further, the mandible reconstruction bracket is made of titanium metal.

The utility model discloses in, first nail hole with can pass the titanium nail in the second nail hole, and respectively with the mandible stub with the bone graft is fixed.

The utility model discloses in, fretwork design region sets up in being close to the lower edge of support is rebuild to mandible region.

In an embodiment of the present invention, the shape of the hollow hole, for example but not limited to, is elliptical.

The utility model has the advantages as follows:

1) the mandible reconstruction bracket can replace the lower part of the defective mandible, is mainly distributed along the muscle force track and is used as a main bearing area of the mandible, and the occurrence of serious complications such as infection, rejection, stress shielding and the like caused by reconstructing the mandible by a fully-heterogeneous material can be effectively reduced.

2) The mandible reconstruction bracket is a biological force type mandible reconstruction bracket based on vascularization bone transplantation, meets the biomechanical distribution of the mandible, reconstructs the mandible in a composite vascularization bone transplantation mode, guides the upper transplanted bone (fibula) to be in place, and can reduce the demand on the transplanted bone of a supply area. The reconstructed mandible is divided into an upper part and a lower part, the upper layer is vascularized transplanted bone which is in direct contact with mucous membrane, micro leakage can be effectively prevented, the anti-infection capability is strong, and the implantation is facilitated; the lower layer is a mandible reconstruction bracket according with biomechanics, is mainly distributed along a muscle force track and is a main bearing area of the mandible. The mandible bone reconstructed by the bracket and the transplanted bone can reduce the bone absorption caused by stress shielding, thereby reducing the occurrence of complications such as implant fracture and the like.

3) The mandible reconstruction bracket and the mandible stump are fixed by adopting a double-tension screw mode, and the biomechanical distribution of the mandible is closer to that of the mandible. And traditional mandible is firm fixed mode long-term to select for use titanium plate maintenance, but often can produce great stress shielding phenomenon, leads to the final fracture of titanium plate.

4) The lower half part of the mandible reconstruction bracket is a stress blank zone, and hollow design is carried out, so that the strength of the mandible reconstruction bracket and the stress distribution of the mandible are ensured, the adherence of jaw muscle groups is promoted and reduced, and the dynamic function reconstruction of the mandible is promoted.

5) The porous design of the mandible reconstruction bracket can increase the contact area with the mandible stump, promote osseointegration and be beneficial to the immediate load bearing of the prosthesis.

Drawings

Fig. 1 is a schematic front view of a mandible reconstruction bracket of the present invention;

fig. 2 is a schematic top view of the mandible reconstruction bracket of the present invention;

fig. 3 is a schematic side view of the mandible reconstruction frame of the present invention attached to a graft bone;

fig. 4 is a perspective view illustrating a use state of the mandible reconstruction bracket of the present invention;

fig. 5 is a schematic plan view of the mandible reconstructing support according to the present invention.

The reference numerals in the figures are respectively:

1. a first cross-section;

2. a second cross-section;

3. an inner side surface;

10. transplanting bone;

11. hollowing out holes;

12. a first nail hole;

13. a second nail hole;

14. a lower edge;

20. the stump of the mandible.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

The present embodiment provides a mandible reconstruction scaffold, referring to fig. 1 to 3, the mandible reconstruction scaffold has an irregular structure, including a first cross section 1 and a second cross section 2; wherein the oblique angle between the first section 1 and the second section 2 is 30 to 60 degrees. At least one first nail hole 12 is respectively arranged on two sides of the first section 1, and the first nail hole 12 penetrates through the first section 1 and the second section 2 and is used for fixing the mandible reconstruction bracket on a first target object; the first section 1 is provided with at least one second nail hole 13 for fixing the mandible reconstruction bracket on a second target object.

The first section 1 further comprises a hollow design area, and the hollow design area is provided with at least one hollow hole 11, so that the attachment of jaw lifting and jaw lowering muscle groups such as mandible hyoid bones and masseter muscles is facilitated, and the power for reconstructing the mandible is recovered. The first target object is a mandible stump 20; the second target is a bone graft 10. Be equipped with on the mandible rebuild the support with medial surface 3 of the lower extreme laminating of transplant bone 10 is favorable to the mandible rebuild the support and transplant bone 10 full contact.

The lower rim 14 of the mandible reconstruction bracket conforms to the anatomical contour of the lower rim of the mandible. The edge of the mandible reconstruction bracket is designed to be round angle, so as to avoid damaging surrounding soft tissues due to over sharp. The mandible reconstruction bracket is made of titanium metal.

This embodiment provides one the utility model discloses a mandible rebuilds support concrete application in mouth cavity maxillofacial restoration reconstruction operation, as shown in fig. 3 to 5, adopt compound vascularization bone grafting's mode, utilize the utility model discloses a mandible rebuilds support and transplants bone 10 and rebuilds patient's mandible jointly, specifically as follows:

when a doctor performs an operation, the second nail hole 13 on the mandible reconstruction bracket can be used as a drilling position, and then the mandible reconstruction bracket is fixed on the mandible stump 20 by using a titanium nail; in a similar way, the jaw bone reconstruction bracket is fixed with the graft bone 10 by using the first nail holes 12 and the titanium nails, so as to guide the graft bone 10 to be in place and jointly reconstruct the mandible. Be equipped with on the mandible rebuild the support with medial surface 3 of the lower extreme laminating of transplant bone 10 makes the mandible rebuild the support with transplant bone 10 full contact. The mandible rebuilds the support with the surface of transplanting bone 10 reaches the combination between the mandible stub 20, the stress distribution of the mandible that is favorable to rebuilding after is more even. The hollowed-out design in the mandible reconstruction bracket is beneficial to the attachment of mandible hyoid bones, masseter muscles and other jaw lifting and lowering muscle groups, and helps to reconstruct mandible and restore power.

The utility model discloses a mandible rebuilds support accords with mandible biomechanics, does not harm soft tissue on every side, and mandible after the rebuilding not only anti infectivity is good, still is favorable to tooth to plant.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A mandible reconstruction scaffold, characterized in that it comprises a first cross section (1) and a second cross section (2); wherein the oblique angle between the first section (1) and the second section (2) is 30-60 degrees; at least one first nail hole (12) is respectively arranged on two sides of the first section (1), and the first nail hole (12) penetrates through the first section (1) and the second section (2) and is used for fixing the mandible reconstruction bracket on a first target object; the first section (1) is provided with at least one second nail hole (13) for fixing the mandible reconstruction bracket on a second target object.

2. The mandible reconstruction bracket according to claim 1, wherein the first cross section (1) further comprises a hollowed-out design area, and the hollowed-out design area is provided with at least one hollowed-out hole (11).

3. The mandible reconstruction bracket of claim 1, wherein the first target is a mandible stump (20); the second target is a bone graft (10).

4. The mandible reconstruction bracket according to claim 3, characterized in that the mandible reconstruction bracket is provided with an inner side surface (3) which is attached to the lower end of the transplanted bone (10).

5. The mandibular reconstruction bracket of claim 1, wherein a inferior border (14) of the mandibular reconstruction bracket conforms to the anatomical contour of the inferior border of the mandible.

6. The mandibular reconstruction bracket of claim 1, wherein the edges of the mandibular reconstruction bracket are of rounded design.

7. The mandibular reconstruction bracket of any one of claims 1 to 6, wherein the material of the mandibular reconstruction bracket is titanium metal.