A maxillofacial defect repair implant

Abstract

The utility model discloses a jaw surface defect repair implant, the jaw surface defect repair implant includes: implant body, the implant body has with human body jaw bone surface adaptation and the inside belly of conformance, the surface of implant body has concave -convex structure, groove hole is set up on the implant body, and the groove hole is used for inducing bone growth, fixed hole is set up on the implant body, and the fixed hole is used for passing through fixed part to fix implant body in human body defect's jaw surface part, in the utility model, through setting up concave -convex structure on the surface of implant body, has increased the contact area and hydrophilic property with muscle, skeleton, the adhesion and multiplication of cell on the above -mentioned are convenient, through setting up groove hole, provides the space for muscle to adhere directly to the skeleton on, avoided the emergence facial muscle atrophy collapse problem.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and further to an implant for repairing maxillofacial defects. Background Technology

[0002] Jawbone repair surgery is a procedure used to repair jawbone defects or deformities, suitable for patients with jawbone defects caused by trauma, tumor resection, congenital malformations, etc. These patients seek to improve their facial appearance and function through surgery. During the procedure, an incision is first made in the jawbone area. Then, through this incision, the muscles are detached from the bone. Autologous bone grafts, allogeneic bone grafts, or artificial materials are used to repair the jawbone defect. Finally, the muscles are repositioned, and the wound is sutured.

[0003] Due to the limited availability of autologous bone and the potential for immune rejection with allogeneic bone, artificial materials are routinely used in clinical practice for surgery. Currently, the most commonly used artificial materials are titanium and polyetheretherketone (PEEK). Because titanium has a much higher elastic modulus than human bone, it presents stress shielding issues after implantation and can produce artifacts in imaging examinations, affecting the surgeon's assessment of the surgical outcome and subsequent disease diagnosis. Therefore, doctors currently prefer PEEK prostheses for surgery.

[0004] PEEK is a bio-inert material. Currently, PEEK implants on the market have a smooth surface. After implantation, the muscle has no attachment point on the implant, so the muscle does not bear the tensile and contractile loads. Human muscles atrophy from disuse, and muscles that are not used for a long time will eventually collapse due to muscle atrophy, resulting in the loss of the surgical effect of improving facial appearance. Utility Model Content

[0005] To address the aforementioned technical problems, the purpose of this utility model is to provide an implant for repairing maxillofacial defects. By setting an uneven structure on the surface of the implant body, the contact area and hydrophilicity with muscles and bones are increased, facilitating cell adhesion and proliferation. By setting slots, space is provided for muscles to directly adhere to the bones, avoiding the problem of facial muscle atrophy and collapse.

[0006] To achieve the above objectives, this utility model provides an implant for repairing maxillofacial defects, comprising:

[0007] The implant body has an inner abdomen that adapts and fits the surface of the human jawbone, and the surface of the implant body has a concave-convex structure.

[0008] A slot is provided on the implant body, and the slot is used to induce bone growth;

[0009] A fixation hole is provided on the implant body, and the fixation hole is used to pass through the fixation member to fix the implant body to the maxillofacial defect of the human body.

[0010] In some embodiments, the uneven structure includes at least one of regular stripe patterns, regular fish scale patterns, regular polygonal grid patterns, irregular rock-like surface depressions, and irregular volcano-like surface depressions.

[0011] In some embodiments, the height of the undulations in the concave-convex structure ranges from 0.001 mm to 2 mm.

[0012] In some embodiments, the slot includes a plurality of spaced through slots that penetrate the implant body and the openings of the through slots face the side of the implant body.

[0013] In some embodiments, the through groove includes at least one of a straight elongated groove, a chamfered groove, and an irregularly shaped groove.

[0014] In some embodiments, the distance between the through groove and the side edge of the implant body is 0.5mm-30mm;

[0015] The width of the through groove is 0.2mm-15mm.

[0016] In some embodiments, the slot includes a plurality of spaced-apart through holes that penetrate the implant body;

[0017] The through hole includes at least one of the following: rectangular hole, diamond-shaped hole, polygonal hole, circular hole, elliptical hole, and irregular-shaped hole.

[0018] In some embodiments, the implant body has a ventral surface on its periphery, the ventral surface having a gradient structure, and the thickness of the interface between the ventral surface and the human maxillofacial region is 0.1mm-2mm.

[0019] In some embodiments, the implant body is made of one of pure polyetheretherketone, composite hydroxyapatite material, composite calcium phosphate material, or composite bone morphogenetic protein.

[0020] In some embodiments, the surface of the implant body is provided with a coating;

[0021] The coating is hydroxyapatite or calcium phosphate.

[0022] Compared with the prior art, the maxillofacial defect repair implant provided by this utility model has the following beneficial effects:

[0023] In this invention, the implant body is shaped according to the human maxillofacial defect, and the inner surface of the implant body fits and conforms to the surface of the human jawbone, with a smooth transition between the implant body and the surface of the human jawbone. By setting concave and convex structures on the surface of the implant body, the contact area with muscles and bones is increased, as well as hydrophilicity, facilitating cell adhesion and proliferation. By setting slots, space is provided for muscles to directly adhere to the bones, and by setting fixing holes, the implant body can be fixed in the defective maxillofacial area. This maxillofacial defect repair implant solves the problem of postoperative muscle attachment and avoids the problem of facial muscle atrophy and collapse. Attached Figure Description

[0024] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0025] Figure 1 This is a schematic diagram of the structure of a preferred embodiment of the maxillofacial defect repair implant of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of a preferred embodiment of the maxillofacial defect repair implant from another perspective.

[0027] Figure 3 This is a schematic diagram of the structure of a maxillofacial defect repair implant according to another preferred embodiment of the present invention;

[0028] Figure 4 This is a partial structural schematic diagram of a preferred embodiment of the maxillofacial defect repair implant of this utility model;

[0029] Figure 5 This is a partial structural schematic diagram of another preferred embodiment of the maxillofacial defect repair implant of this utility model;

[0030] Figure 6 This is a schematic diagram of the preferred embodiment of the maxillofacial defect repair implant in use.

[0031] Explanation of icon numbers:

[0032] Implant body 1, inner abdomen 11, ventral side 12, concave-convex structure 13, slot 2, through slot 21, through hole 22, fixation hole 3, human body 4. Detailed Implementation

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0034] To keep the drawings concise, each figure only schematically shows the parts relevant to the utility model, and these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0035] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0036] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] In one embodiment, refer to the appendix to the specification. Figures 1 to 6 The present invention provides an implant for repairing maxillofacial defects, comprising: an implant body 1, a slot 2, and a fixation hole 3. The implant body 1 has an inner abdomen 11 that adapts and fits the surface of the human jawbone, and the surface of the implant body 1 has a concave-convex structure 13. The slot 2 is provided on the implant body 1 and is used to induce bone growth. The fixation hole 3 is provided on the implant body 1 and is used to pass through a fixation member to fix the implant body 1 to the maxillofacial defect of the human body 4.

[0039] In this embodiment, the implant body 1 is shaped according to the human maxillofacial defect. The inner abdomen 11 of the implant body 1 is adapted to fit the surface of the human jawbone, and the transition between the implant body 1 and the surface of the human jawbone is smooth. By setting the concave and convex structure 13 on the surface of the implant body 1, the contact area with muscles and bones and hydrophilicity are increased, which facilitates cell adhesion and proliferation. By setting the slot 2, space is provided for the muscles to directly adhere to the bones. By setting the fixing hole 3, the implant body 1 can be fixed in the defective maxillofacial area. This maxillofacial defect repair implant solves the problem of postoperative muscle attachment and avoids the problem of facial muscle atrophy and collapse.

[0040] In one embodiment, refer to the appendix to the specification. Figures 1 to 5 The uneven structure 13 includes at least one of the following: regular stripes, regular fish scales, regular polygonal grids, irregular rock-like surface depressions, and irregular volcano-like surface depressions. By setting the uneven structure 13 on the surface of the implant body 1, the contact area and hydrophilicity with muscles and bones are increased, facilitating cell adhesion and proliferation. Of course, the uneven structure 13 can also be set to other structures according to actual needs, as long as the above functions can be achieved.

[0041] The height of the undulations in the concave-convex structure 13 ranges from 0.001mm to 2mm. The height of the undulations in the concave-convex structure 13 can be set to any value within this range according to actual needs.

[0042] Furthermore, the implant body 1 has a ventral surface 12 on its periphery, and the ventral surface 12 is a gradually tapering surface.

[0043] The structure is such that the thickness of the interface between the ventral side 12 and the human maxillofacial region is 0.1mm-2mm. This ensures a smooth transition between the implant body 1 and the bone surface.

[0044] In one embodiment, refer to the appendix to the specification. Figure 1 The slot 2 includes several spaced-apart through slots 21 that penetrate the implant body 1, with the openings of the through slots 21 facing the side of the implant body 1. The through slots 21 include at least one of the following: a straight elongated slot, a chamfered slot, or an irregularly shaped slot, such as a dovetail-shaped slot. By providing the through slots 21, muscles can pass through them and directly contact the bone, providing space for direct muscle adhesion to the bone and space for bone ingrowth into the implant body 1, thus avoiding the problem of facial muscle atrophy and collapse.

[0045] Furthermore, the distance between the through groove 21 and the side edge of the implant body 1 is 0.5mm-30mm. The specific distance between the through groove 21 and the side edge of the implant body 1 can be set to any value within this range according to actual needs. The width of the through groove 21 is 0.2mm-15mm. The specific width of the through groove 21 can be set to any value within this range according to actual needs.

[0046] In another embodiment, refer to the appendix to the specification. Figure 3 The slot 2 includes a plurality of spaced through holes 22, which penetrate the implant body 1. The through holes 22 include at least one of rectangular, rhomboid, polygonal, circular, elliptical, or irregularly shaped holes. By providing the through holes 22, muscles can pass through them and directly contact the bone, providing space for direct muscle adhesion to the bone and space for bone ingrowth into the implant body 1, thus avoiding the problem of facial muscle atrophy and collapse.

[0047] In one embodiment, refer to the appendix to the specification. Figures 1 to 6 The implant body 1 is made of polyetheretherketone (PEEK) and composite bone growth induction materials, which are medical implantable materials. For example, the implant body 1 is made of one of the following: pure polyetheretherketone (PEEK), composite hydroxyapatite (PEEK+HA), composite calcium phosphate, or composite bone morphogenetic protein.

[0048] Furthermore, the surface of the implant body 1 is coated with a hydroxyapatite or calcium phosphate coating. By uniformly distributing hydroxyapatite or calcium phosphate on the surface of the implant body 1, new bone will form at the contact point between the defective maxillofacial region and the implant body 1, filling the entire gap between the defective maxillofacial region and the implant body 1, and growing on the hydroxyapatite. Bone callus is likely to form at the defective maxillofacial region covered by the implant body 1, ultimately integrating the implant body 1 with human tissue, greatly reducing the chance of postoperative infection.

[0049] Furthermore, the implant body 1 can be manufactured using traditional subtractive processing methods such as machining, or additive manufacturing using 3D printing. The uneven structure 13 on the upper surface of the implant body 1 can be formed through machining, spraying, shot peening, or 3D printing. Jawbone data acquisition and reconstruction of three-dimensional jawbone images can be performed using methods known in the art. For example, jawbone data acquisition can be achieved through CT / MRI and other means; the acquired data can be imported into medical image processing software to perform three-dimensional reconstruction of the jawbone model. The implant body 1 can be designed using reverse modeling based on CT scan data, ensuring that the ventral surface of the implant fits perfectly with the bone surface, guaranteeing a smooth transition between the implant and the human jawbone surface.

[0050] Furthermore, the fixing hole 3 can be configured as a screw hole, which can be adapted to different screw types, such as countersunk holes, tapered holes, threaded holes, or round holes. The implant body 1 can be fixed to the defective maxillofacial region using screws to achieve postoperative stability. This maxillofacial defect repair implant can be used in the mandibular region or other areas of the maxillofacial region, such as the cheekbone, maxilla, and nose.

[0051] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0052] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An implant for repairing maxillofacial defects, characterized in that, include: The implant body has an inner abdomen that adapts and fits the surface of the human jawbone, and the surface of the implant body has a concave-convex structure. A slot is provided on the implant body, and the slot is used to induce bone growth; A fixation hole is provided on the implant body, and the fixation hole is used to pass through the fixation member to fix the implant body to the maxillofacial defect of the human body.

2. The maxillofacial defect repair implant according to claim 1, characterized in that, The uneven structure includes at least one of the following: regular stripe pattern, regular fish scale pattern, regular polygonal grid pattern, irregular rock-like surface depression, and irregular volcano-like surface depression.

3. The maxillofacial defect repair implant according to claim 2, characterized in that, The height range of the undulations in the concave-convex structure is 0.001mm-2mm.

4. The maxillofacial defect repair implant according to claim 1, characterized in that, The slot includes a plurality of spaced through slots that penetrate the implant body, with the slot openings facing the side of the implant body.

5. The maxillofacial defect repair implant according to claim 4, characterized in that, The through groove includes at least one of the following: a straight elongated groove, a chamfered groove, and an irregularly shaped groove.

6. The maxillofacial defect repair implant according to claim 5, characterized in that, The distance between the through groove and the side edge of the implant body is 0.5mm-30mm; The width of the through groove is 0.2mm-15mm.

7. The maxillofacial defect repair implant according to claim 1, characterized in that, The slot includes a plurality of spaced through holes that penetrate the implant body; The through hole includes at least one of the following: rectangular hole, diamond-shaped hole, polygonal hole, circular hole, elliptical hole, and irregular-shaped hole.

8. The maxillofacial defect repair implant according to claim 1, characterized in that, The implant body has a ventral surface on its periphery, the ventral surface has a gradient structure, and the thickness of the interface between the ventral surface and the human maxillofacial region is 0.1mm-2mm.

9. The maxillofacial defect repair implant according to claim 1, characterized in that, The implant body is made of one of the following: pure polyetheretherketone, composite hydroxyapatite, composite calcium phosphate, or composite bone morphogenetic protein.

10. The maxillofacial defect repair implant according to claim 1, characterized in that, The surface of the implant body is provided with a coating; The coating is hydroxyapatite or calcium phosphate.

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