CN219147982U - Guiding and positioning device for incremental repair of alveolar bone - Google Patents

Abstract

The utility model discloses a guiding and positioning device for incremental repair of alveolar bones, which comprises a titanium mesh, wherein at least one side of the titanium mesh is integrally connected with a titanium guide plate; in use, the titanium mesh is positioned at the alveolar ridge of the defect, and the titanium guide plate has a semi-surrounding structure and is attached to the surface of the adjacent tooth of the alveolar ridge of the defect to guide the titanium mesh into position and define the position of the titanium mesh. The utility model can more effectively assist the titanium mesh to be placed at the correct position before the fixture is driven, and simultaneously avoid the titanium mesh from moving in the process of driving the fixture, thereby realizing digital accurate bone increment operation, finally improving the alveolar bone increment effect and creating better conditions for the subsequent implant.

Description

Guiding and positioning device for incremental repair of alveolar bone

Technical Field

The utility model relates to an oral medical appliance, in particular to a guiding and positioning device for repairing an alveolar bone increment.

Background

Guiding bone tissue regeneration (Guided Bone Regeneration, GBR) is one of the most common bone augmentation procedures for solving alveolar bone defects, and means that the barrier membrane characteristics are utilized to prevent fibroblasts from surrounding soft tissues, so that osteoblasts at the bone surface have enough time to proliferate, and finally, the purposes of tissue regeneration and directional repair are achieved. Conventional titanium mesh serves as a non-absorbable barrier membrane, with its unique advantages in terms of spatial support and durable osteogenesis. Besides the advantages of the traditional titanium mesh, the personalized titanium mesh manufactured by the three-dimensional printing technology can also more accurately design the outline shape and the volume of the incremental bone, and further is more attached to the anatomical form of the alveolar bone; freely optimizing various parameters of the personalized titanium mesh, such as thickness, mesh morphology and interface morphology; avoiding damage to adjacent important nerves and blood vessels; the operation time in the operation of doctors is reduced, and the operation wounds of patients are reduced; reducing the technical sensitivity. But the personalized titanium mesh obtained by 'free' design in reconstruction software is not always in compliance with the planting principle of repair guidance. The incremental results obtained at the completion of the bone incremental treatment often do not reach the ideal post-incremental bone profile; at the same time, retention and stabilization on the defect alveolar ridge is also not ideal, which affects the effect of the final bone augmentation and the final implant repair to some extent.

Along with the gradual deep planting concept taking repair as guide, the titanium mesh can obtain the optimal three-dimensional implantation position of the implant according to the optimal position of the oral cavity prosthesis in the manufacturing process, so as to design ideal bone increment, and finally obtain the personalized titanium mesh with repair guide design. The novel customized three-dimensional printing titanium mesh avoids a plurality of defects of the traditional titanium mesh and the personalized titanium mesh with 'free' design to a certain extent, but the repairing and guiding three-dimensional printing personalized titanium mesh still needs to guide the titanium mesh to be accurately positioned through the positioning device, so that the accurate position transfer is completed, and the real bone increment profile is completely consistent with the ideal state of the design.

In the prior art, china patent with the application number of 202010661935.X discloses an individualized titanium mesh guiding and positioning device for an alveolar bone incremental operation and a manufacturing method, a tooth support type guide plate is made of resin materials, a bone incremental titanium mesh is connected with the resin tooth support type guide plate through a columnar connector, the device is made of two materials, and errors occur in connection due to the difference of expansion coefficients of manual connection operation and different materials, so that the transfer and positioning errors of the titanium mesh are caused. The device has complex structure and complex manufacturing procedure. In addition, the titanium mesh and the guide plate of the device are connected in a plug-in structure, and when the titanium mesh is fixed by the retention nails and then is separated from the guide plate more difficultly, the titanium mesh can obviously swing, and the titanium mesh is not beneficial to wide clinical application and practical operation.

Disclosure of Invention

The utility model aims to reduce the transfer and positioning errors of the titanium mesh, so that the titanium mesh is positioned more accurately, thereby increasing the clinical applicability of the titanium mesh; in addition, after the fixing nails are fixed, the difficulty in separating the titanium mesh from the guide plate is reduced.

In order to achieve the above-mentioned object, the present utility model provides a guiding and positioning device for incremental repair of alveolar bone, comprising a titanium mesh, at least one side of which is integrally connected with a titanium guide plate; in use, the titanium mesh is positioned at the alveolar ridge of the defect, and the titanium guide plate has a semi-surrounding structure and is attached to the surface of the adjacent tooth of the alveolar ridge of the defect to guide the titanium mesh into position and define the position of the titanium mesh.

Preferably, the titanium mesh is connected with the titanium guide plate through a connecting part, a plurality of separating holes are formed in the connecting part, and after the titanium mesh is fixed in position, the connecting part is convenient to fracture, and the titanium guide plate and the titanium mesh are separated.

Preferably, the shape of the separation hole is at least one of rectangle, diamond, ellipse, circle, star-shaped line. The length direction of the rectangle, the long diagonal direction of the diamond, the long axis direction of the ellipse and the diagonal direction of the star are the same as the fracture direction of the joint.

Preferably, the length of the connecting part is 0.8-1.2 mm, and the thickness is 0.4-0.6 mm; the separation holes are arranged in the length direction of the joint.

Preferably, the thickness of the titanium mesh and the titanium guide plate is 0.3-0.8mm.

Preferably, the titanium mesh is distributed with a plurality of titanium mesh grids, and the aperture size of the titanium mesh grids is 1.5-2.5 mm.

Preferably, the titanium mesh extends around 3-5 mm across the edge of the bone defect.

Preferably, both sides of the titanium mesh are respectively connected with a titanium guide plate integrally.

The technical effects of the utility model include:

(1) The titanium mesh is integrally connected with the titanium guide plate, the materials are completely the same, connection errors can be avoided, the shape of the titanium guide plate is designed according to the surface shapes of teeth on two sides of an alveolar ridge of a patient defect, the titanium guide plate is completely attached to the shapes of the teeth on two sides of the alveolar ridge, and the titanium guide plate is used as a guiding and positioning device, so that the titanium mesh can be more effectively assisted to be placed at a correct position before a fixing nail is driven in, digital accurate bone increment operation is realized, titanium mesh transfer errors are avoided, in-situ errors are reduced, an alveolar bone increment effect is finally improved, and better conditions are created for subsequent implant.

(2) The connecting part is provided with a plurality of separation holes, and the separation holes are arranged in the length direction of the connecting part. After the titanium mesh is fixed at the correct position by the retention nails, the titanium guide plate and the titanium mesh can be conveniently and neatly separated at the separation holes of the connection part by bending with proper force.

(3) The implantation principle of 'repair guidance surgery' is followed, and according to the best repair effect after the alveolar bone is reconstructed, the best osteogenesis outline induction can be realized by accurately printing the titanium mesh outline. The method avoids the unexpected shape of the osteogenesis of the alveolar bone, guides the osteogenesis of the alveolar bone to form the optimal outline, and is beneficial to the later-stage dental implantation and repair. Compared with the traditional titanium mesh, the three-dimensional printed titanium mesh overcomes the pre-bending process of the titanium mesh before implantation, and can realize the precise attachment of the edge of the titanium mesh and the shape of the residual bone mass. The time for pre-bending and fixing the titanium mesh in the operation is saved.

Drawings

FIG. 1 is a schematic view of a guide positioning device for incremental repair of alveolar bone according to the present utility model;

fig. 2, 3 and 4 are schematic diagrams of the joints.

Reference numerals: 1-titanium mesh; 2-junction; 21-separation wells; 3-titanium guide plate.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Each aspect or embodiment defined herein may be combined with any other aspect or embodiment unless clearly indicated to the contrary. In particular, any feature indicated as being preferred or advantageous may be combined with any other feature or features indicated as being preferred or advantageous.

As shown in fig. 1, the present utility model provides a guiding and positioning device for incremental repair of alveolar bone, comprising a titanium mesh 1, at least one side of the titanium mesh 1 is connected with a titanium guide plate 3; the titanium mesh 1 is arranged at the position of the defective alveolar ridge, and the titanium guide plate 3 is provided with a semi-surrounding structure and is attached to the surfaces of teeth on two sides of the defective alveolar ridge. The titanium mesh 1 is integrally connected with the titanium guide plate 3, the materials are completely the same, connection errors can be avoided, the shape of the titanium guide plate 3 is designed according to the surface shapes of teeth on two sides of an alveolar ridge of a patient, the titanium guide plate can be completely attached to the shape of the teeth, the titanium guide plate is used as a guiding and positioning device, the titanium mesh 1 can be more effectively assisted to be placed at a correct position before a fixing nail is driven in, digital accurate bone increment operation is realized, and finally an alveolar bone increment effect is improved.

In some embodiments, two sides of the titanium mesh are respectively connected with a titanium guide plate.

When the titanium mesh 1 is designed, the optimal implantation three-dimensional position of the implant can be obtained according to the optimal position of the oral cavity prosthesis, so that the ideal bone increment is designed, and finally the personalized titanium mesh 1 for repairing and guiding design is obtained. The titanium mesh 1 can guide the alveolar bone to be repaired at an accurate position and promote the increment of the alveolar bone, thereby creating better conditions for the subsequent implant.

As shown in fig. 2, 3 and 4, the titanium mesh 1 is integrally connected with the titanium guide plate 3 to form a joint 2, the joint 2 is provided with a plurality of separation holes 21, and the separation holes 21 are arranged in a row along the joint 2. After the titanium net 1 is fixed in the correct position by the retention nails, the titanium guide plate 3 and the titanium net 1 can be conveniently and neatly separated at the connecting position 2 by bending with proper force.

In some embodiments, the length of the joint 2 is 0.8-1.2 mm, and the width is 0.4-0.6 mm; the length is the distance between the titanium guide plate 3 and the titanium mesh 1. If the width is too wide, the regular separation of the titanium guide plate 3 and the titanium mesh 1 is not facilitated after the fixing of the fixing nails. If the width is too narrow, it may result in insufficient strength of the joint 2, thereby affecting the positioning effect.

As shown in fig. 2, 3, and 4, in some embodiments, the shape of the separation hole 21 may be at least one of rectangular, rhombic, elliptical, circular, and star-shaped. The length direction of the rectangles, the long diagonal directions of the diamonds, the long axis directions of the ellipses, or the long axis directions of the star-shaped lines are on the same axis, and are the same as the length direction of the connecting part 2, so that the titanium guide plate 3 and the titanium net 1 can be separated more conveniently. The shape of the separation holes 21 may be other regular or irregular shapes.

In some embodiments, a plurality of titanium mesh grids are distributed on the titanium mesh 1 to enhance blood supply and promote osteogenesis; the aperture size is 2mm; the titanium mesh 1 extends around 3-5 mm across the edge of the bone defect, and the edge is provided with titanium nail holes for implanting and fixing titanium nails so that the titanium mesh 1 can be stably fixed at the bone defect position. The thickness of the titanium mesh 1 and the titanium guide plate 3 is 0.3-0.8mm so as to ensure the strength of the titanium guide plate and the titanium mesh, and simultaneously save materials as much as possible.

Finally, the titanium mesh 1 is removed after the incremental repair of the alveolar bone is completed.

Examples

This example discloses the manufacturing process of the guide positioning device for alveolar bone incremental repair of the present application.

S1, planning a preoperative surgical scheme. The operations of plaster model preparation, intraoral scanning and the like are adopted to match and integrate soft and hard tissue data in the mouth, and digital virtual tooth arrangement is carried out in design software (such as 3 shape) to complete virtual design. On the basis, digital planting design is carried out, the virtual implant introduces data of virtual tooth arrangement and the virtual implant into titanium mesh design software, and virtual alveolar bone increment measurement and calculation are carried out by integrating the alveolar bone morphology, bone quantity around the implant, soft tissue condition and the like, so that the optimal alveolar bone increment effect is obtained.

The purpose of the plaster model is to realize repair and guide planting surgery, namely to determine the optimal three-dimensional space position of the implant according to the position of the final prosthesis. Thus, jaw information, tooth information, and soft tissue information need to be matched together. So that the plaster model and the mouth scan data are matched to synthesize a fusion model. The scanned data information contains tooth information, gingival mucosa information and the like. The tooth arrangement has a certain rule, and the optimal tooth position needs to be analyzed according to occlusion, so that the tooth arrangement can be realized in a plurality of software. The design principle comprises: at least 1.5mm of bone wrapping and soft tissue covering are needed around the implant; the implant location in the aesthetic area of the anterior teeth should be 3-4mm below the ideal gingival margin in the future, etc.

S2, designing a guiding and positioning device for incremental repair of the alveolar bone. In software, according to the optimal alveolar bone increment effect obtained in the step S1, designing the thickness of the main body of the titanium mesh 1 to be 0.3-0.8mm; a plurality of titanium mesh grids are scattered on the main body of the titanium mesh 1, and the aperture size is about 2mm; the titanium mesh 1 edge extends about 4mm around across the bone defect edge. The thickness of the titanium guide plate 3 is 0.3-0.8mm. The connection 2 between the titanium guide plate 3 and the titanium net 1 is provided with a plurality of separation holes 21.

And S3, realizing three-dimensional printing, trimming and polishing. Adopting an electron beam fusion forming method, utilizing a titanium alloy three-dimensional printer, finishing three-dimensional printing, cooling, blowing off excessive powder by an air gun, polishing, grinding, finishing and the like by utilizing medical grade titanium alloy powder, and then measuring mechanical properties such as breaking strength, bending strength and the like of the titanium mesh 1; sterilizing; finally, sterilizing at high temperature and high pressure, and performing sterilization double-layer packaging after performing biological detection on the implant.

The implementation process of the embodiment follows the planting principle of repair guiding surgery, and according to the best repair effect after the alveolar bone is reconstructed, the best osteogenesis contour induction can be realized by accurately printing the titanium mesh contour. The method avoids the unexpected shape of the osteogenesis of the alveolar bone, guides the osteogenesis of the alveolar bone to form the optimal outline, and is beneficial to the later-stage dental implantation and repair. The traditional titanium mesh is made by cutting a finished titanium mesh, namely, after cutting and turning the valve in the operation, the titanium mesh is bent at will by a free hand according to the defect shape of the alveolar bone, namely, the preflex. The three-dimensional printing technology can precisely print the titanium mesh attached to the alveolar bone according to the bone morphology of the bone defect periphery contacted with the titanium mesh, and the intraoperative trimming and bending of the titanium mesh are not needed at all; the time for pre-bending and fixing the titanium mesh in the operation is saved; and the fitting property of the titanium mesh and the alveolar bone is far more accurate than that of manual bending. According to CT data of each patient, a bone part with good biomechanical strength, which is not broken after pressure is applied, is found, and the implantation part of the titanium nail is fixed, so that the optimal retention of the titanium nail can be realized, and the damage to important tissue structures (important tissue structures such as a lower tooth socket nerve tube, an important blood vessel, a maxillary sinus and the like) during the implantation of the titanium nail can be avoided to the greatest extent. Not only can the best retention be realized, but also the safest retention can be realized. According to the related software, the area of the three-dimensional printed titanium net list can be calculated, so that the area and the shape of the transplanted soft tissue or soft tissue substitution product required by closing the wound can be calculated preliminarily, and pre-operation prefabrication can be realized.

In summary, the utility model provides a guiding and positioning device for repairing an alveolar bone increment, the titanium mesh and the titanium guide plate are integrally connected, the titanium mesh and the titanium guide plate are completely the same in material, errors in the connecting process can be avoided, the shape of the titanium guide plate is designed according to the surface shape of teeth on two sides of an alveolar ridge of a patient, the titanium guide plate can be completely attached to the shape of the teeth, and the guiding and positioning device can be used as a guiding and positioning device to more effectively assist the titanium mesh to be placed at a correct position before a fixture is driven, so that the clinical applicability of the titanium mesh is increased to realize a digital accurate bone increment operation, the alveolar bone increment effect is finally improved, and better conditions are created for a subsequent implant. The connecting part is provided with a plurality of separation holes, and the separation holes are arranged at the connecting part and are arranged in a row along the length direction of the connecting part. After the titanium mesh is fixed at the correct position by the retention nails, the titanium guide plate and the titanium mesh can be conveniently and neatly separated at the separation holes of the connection part by bending with proper force.

While the present utility model has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the utility model. Many modifications and substitutions of the present utility model will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the utility model should be limited only by the attached claims.

Claims (9)

1. The guiding and positioning device for incremental repair of the alveolar bone is characterized by comprising a titanium net, wherein at least one side of the titanium net is integrally connected with a titanium guide plate; in use, the titanium mesh is positioned at the alveolar ridge of the defect, and the titanium guide plate has a semi-surrounding structure and is attached to the surface of the adjacent tooth of the alveolar ridge of the defect to guide the titanium mesh into position and define the position of the titanium mesh.

2. The guiding and positioning device for incremental repair of alveolar bone according to claim 1, wherein a plurality of separation holes are formed at the connection between the titanium mesh and the titanium guide plate, and after the titanium mesh is fixed in position, the connection is broken to separate the titanium guide plate from the titanium mesh.

3. The guide positioning device for incremental repair of alveolar bone of claim 2 wherein said separation aperture is at least one of rectangular, diamond-shaped, oval, circular, and star-shaped.

4. A guide positioning device for incremental repair of alveolar bone as claimed in claim 3 wherein the length direction of the rectangle, the long diagonal direction of the diamond, the long axis direction of the ellipse, the diagonal direction of the star are the same as the fracture direction of the junction.

5. The guide and positioning device for incremental repair of alveolar bone as claimed in claim 2, wherein the length of the junction is 0.8-1.2 cm and the thickness is 0.4-0.6 mm; the separation holes are arranged in the length direction of the joint.

6. The guiding and positioning device for incremental repair of alveolar bone according to claim 1, wherein the thickness of the titanium mesh and the titanium guide plate is 0.3-0.8mm.

7. The guiding and positioning device for incremental repair of alveolar bone according to claim 1, wherein a plurality of titanium mesh grids are distributed on the titanium mesh, and the aperture size of the titanium mesh grids is 1.5-2.5 mm.

8. The guiding and positioning device for incremental repair of alveolar bone according to claim 1 wherein the titanium mesh extends around the bone defect by 3-5 mm across the edge and the edge is provided with titanium nail tunnels for implantation of retention titanium nails.

9. The guide and positioning device for incremental repair of alveolar bone according to claim 1, wherein both sides of the titanium mesh are integrally connected with a titanium guide plate, respectively.

Images