A Z-shaped subperiosteal implant

Abstract

The utility model relates to the field of oral implants, and discloses a Z-shaped subperiosteal implant, comprising a bracket, a front wing and a rear wing connected with the bracket, wherein the front wing, the rear wing and the bracket are three-dimensional structures that conform to the maxillary bone of a human body; the bracket is used to be attached to the surface of the maxillary bone, and a plurality of bases are arranged along the length direction of the bracket, and one end of the base away from the bracket penetrates into the gums for fixing the bracket; the front wing and the rear wing are respectively arranged on both sides of the bracket in the width direction, the front wing is used to be attached and fixed to the surface of the canine support of the maxilla, and the rear wing is located on the side of the greater palatine foramen close to the maxilla and is used to be attached and fixed to the palate side of the maxillary posterior teeth area and the surface of the palatine bone; the rear wing part is placed on the palate side of the maxillary posterior teeth area and the surface of the palatine bone, which can avoid performing a large flap operation on the buccal side, simplify and shorten the operation process, reduce the difficulty, make the operation simpler and safer, and can also reduce the pressure of the implant on the soft tissues on the lip and cheek sides, avoid the occurrence of soft tissue retreat, and reduce the probability of peri-implantitis.

Description

Technical Field

[0001] The utility model relates to the technical field of oral implants, in particular to a Z-shaped subperiosteal implant. Background Art

[0002] With the advent of an aging society, there are more and more elderly people with no teeth in their mouths, and the cases of severe alveolar ridge atrophy are also increasing sharply. Currently, removable dentures, zygomatic implants, and all-on-four implants can be used to repair cases of severe alveolar ridge resorption.

[0003] Among them, removable dentures are retained by adsorption force, surface tension, and atmospheric pressure. Their retention force and restored chewing function are poor in cases of poor jaw anatomical morphology such as severe alveolar bone absorption. Both transzygomatic implants and all-on-four implants require the last implant on both sides of the dental arch to be implanted at an angle, which will form a certain cantilever when repairing the superstructure, and will have a certain adverse effect on the long-term restorative effect of the implant. Moreover, transzygomatic implants need to pass through the maxillary sinus mucosa obliquely, and part of the implant will be exposed in the maxillary sinus, which can easily cause complications such as infection.

[0004] Patent CN219720914U adopts a new type of subperiosteal implant. Although the implant part can avoid passing through the maxillary sinus mucosa, it still has structural defects. The front wing and the rear wing are arranged on the same side, and a large flap surgery is required. The whole surgical process is cumbersome and difficult, and the operation time is also longer. In addition, because the soft tissue on the lip and cheek side is thinner than that on the palate side, the rear wing of this structure placed on the cheek side is prone to cause soft tissue retreat, resulting in poor soft tissue closure of the subperiosteal implant and an increased probability of peri-implantitis. Utility Model Content

[0005] The technical problem to be solved by the utility model is: how to optimize the subperiosteal implant to simplify the surgical process and improve safety. In order to solve the above technical problem, the utility model provides a Z-shaped subperiosteal implant, including a bracket, a front wing and a rear wing connected to the bracket, and the front wing, the rear wing and the bracket are three-dimensional structures that conform to the human maxillary bone;

[0006] The bracket is used to be attached to the surface of the maxillary bone, and the bracket is provided with a plurality of abutments along its length direction, and one end of the abutment away from the bracket penetrates into the gums to fix the bracket;

[0007] The front wing and the rear wing are respectively arranged on both sides of the width direction of the bracket. The front wing is used to be attached and fixed to the surface of the canine support of the maxilla, and the rear wing is located on the side of the greater palatine foramen close to the maxilla and is used to be attached and fixed to the palatal side of the posterior teeth area of ​​the maxilla and the surface of the palatine bone.

[0008] Preferably, the front wing and the rear wing are both provided with a plurality of nail holes for inserting micro screws at intervals.

[0009] Preferably, a threaded hole for screw fixing is arranged inside the base.

[0010] Preferably, the bracket comprises a main structure and a plurality of openings arranged inside the main structure, and the base is disposed on the main structure.

[0011] Preferably, the main structure is arranged in a grid shape, the grid holes of the main structure form the openings, and the base is arranged at the grid nodes of the main structure.

[0012] Preferably, the base comprises a transgingival section connected to the bracket and a fixing section connected to the transgingival section, and the threaded hole coaxially penetrates the transgingival section and the fixing section.

[0013] Preferably, the diameter of the transgingival segment is less than 3 mm, and the thickness of the transgingival segment is not less than 1 mm.

[0014] Preferably, the fixing section is a truncated cone structure with an outer diameter gradually decreasing away from the gingival section, and an annular boss is further provided on the outer wall of the fixing section, and the annular boss is arranged at one end of the fixing section close to the gingival section.

[0015] Preferably, the rear wing is in a triangular structure, and the end of the rear wing away from the bracket is in an arc shape.

[0016] Preferably, the bracket, front wing, rear wing and base are printed and formed using grade 4 titanium powder through selective electron beam casting technology.

[0017] Compared with the prior art, the Z-shaped subperiosteal implant provided in the embodiment of the utility model has the following beneficial effects:

[0018] In the present invention, the bracket is fixed on the maxillary bone through the base by penetrating the gums, and the front wing and the rear wing are respectively fixed on the canine support and the surface of the palatine bone. This type of implant is a fixed denture, and the chewing effect after repair is better than that of a removable denture. Even if the alveolar bone is severely absorbed, the bone in this area still exists, and absorption and reconstruction rarely occur. The implant is well retained and stable, and the implant does not pass through the maxillary sinus, thereby avoiding secondary maxillary sinus infection. In addition, the rear wing is placed on the palatal side of the maxillary posterior teeth area and the palatine bone surface to avoid large flap surgery on the buccal side. The surgical procedure is simplified, the difficulty of the operation is reduced, the surgical process is simpler and safer, and the operation time is shorter. The rear wing is placed on the palatal side of the maxillary posterior teeth area, which can also reduce the pressure of the implant on the labial and buccal soft tissues, avoid soft tissue recession, and reduce the probability of peri-implantitis. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the Z-shaped subperiosteal implant of the utility model after implantation;

[0020] Figure 2 yes Figure 1 A schematic diagram of the structure of another implant when the butterfly-shaped subperiosteal implant is used in pairs;

[0021] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure of butterfly-shaped subperiosteal implant;

[0022] Figure 4 The utility model is a schematic diagram of the butterfly-shaped subperiosteal implant after being assembled into the oral cavity.

[0023] In the figure: 1, bracket; 11, main structure; 12, opening; 2, front wing; 3, rear wing, 4, base; 41, transgingival section; 42, fixing section; 43, threaded hole; 5, nail hole. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] like Figures 1 to 4 As shown, a preferred embodiment of the utility model provides a Z-shaped subperiosteal implant, which includes a bracket 1, a front wing 2 and a rear wing 3 connected to the bracket 1, the front wing 2, the rear wing 3 and the bracket 1 are a three-dimensional structure that conforms to the human maxillary bone; when placing the implant, the bracket 1, the front wing 2 and the rear wing 3 are perpendicular to the alveolar ridge, which can disperse the chewing force more evenly, avoid the problem of uneven force on the implant caused by the cantilever being too long, and achieve a better repair effect. The bracket 1, the front wing 2 and the rear wing 3 conform to the human maxillary bone, which makes the implantation more natural and the force condition of the implant more reasonable, reducing the discomfort after the implant is implanted.

[0026] The bracket 1 is used to be attached to the surface of the maxillary bone. The bracket 1 is provided with a plurality of abutments 4 along its length direction. One end of the abutment 4 away from the bracket 1 penetrates into the gums for fixing the bracket 1. The abutments 4 are arranged at intervals along the length direction of the straight bracket 1, and the length direction of the bracket 1 is the extension direction along the alveolar ridge. When implanting, the abutments 4 will penetrate into the patient's gums, so that the position of the bracket 1 remains stable after multiple stresses, so that the stress on the bracket 1 is more uniform, and the bracket 1 is prevented from loosening.

[0027] The front wing 2 and the rear wing 3 are respectively arranged on both sides of the width direction of the bracket 1. The front wing 2 is used to be attached and fixed to the surface of the canine support of the maxilla, and the rear wing 3 is located on the side of the greater palatine foramen close to the maxilla and is used to be attached and fixed to the palatal side of the posterior teeth area of ​​the maxilla and the surface of the palatine bone. The front wing 2 and the rear wing 3 are respectively attached and fixed to the surface of the canine support and the surface of the palatine bone, and will not pass through the maxillary sinus, thus avoiding the problem of secondary maxillary sinus infection. At the same time, the implant does not need to be implanted in the bone, so the implant can extend to the back of the alveolar bone, thereby reducing the generation of cantilevers. In addition, the long surgical process and possible complications of bone grafting surgery can be avoided, and the success rate of autologous bone transplantation is not limited. In addition, the rear wing 3 is arranged on the palate side and the surface of the palatine bone in the posterior teeth area of ​​the maxilla. Compared with the arrangement on the buccal zygomatic alveolar ridge area, on the one hand, there is no need to perform a large buccal flap operation, which greatly simplifies the postoperative process, reduces the operation time and difficulty, and makes the operation safer; on the other hand, since the soft tissue on the lip and cheek side is thinner than the palate side, the placement of the rear wing 3 on the buccal side is prone to cause soft tissue retreat, resulting in poor soft tissue closure of the subperiosteal implant, which increases the probability of peri-implantitis. Placing the rear wing 3 on the palate side of the posterior teeth area of ​​the maxilla can reduce the risk of soft tissue retreat and the probability of peri-implantitis; and when the mouth opening is small, the rear wing 3 is arranged on the palate side and the surface of the palatine bone in the posterior teeth area of ​​the maxilla, and the installation of the rear wing 3 is more convenient, which can further reduce the difficulty of the operation and reduce the operation time. Furthermore, the implant rear wing 3 is located on the side of the greater palatine foramen close to the maxilla. The design of this position can avoid damage to structures such as the anterior palatine nerve and the greater palatine artery, making the postoperative process safer and more reliable.

[0028] It should also be noted that the Z-shaped subperiosteal implants are usually used in pairs and are placed on both sides of the patient's mouth. In addition, the color of the implant surface can be changed by anodizing, making the implant surface pink or golden, etc., so that the surface color of the implant is coordinated with the color of the mucosa, more closely matching the color of the surrounding oral cavity, and more aesthetically pleasing.

[0029] In some embodiments, the front wing 2 and the rear wing 3 are both provided with a plurality of screw holes 5 for inserting micro screws. Furthermore, the base 4 is provided with threaded holes 43 for screw fixing.

[0030] Specifically, multiple nail holes 5 can increase the fixing strength of the front wing 2 and the rear wing 3, so that the front wing 2 and the rear wing 3 can be stably attached to the load-bearing pillars of the maxillofacial bones, and the chewing force can be evenly and dispersedly transmitted to the maxillofacial bones, ensuring a long-term repair effect. The bracket 1, the front wing 2 and the rear wing 3 are all fixed by screws, which can be more convenient to disassemble and replace. It is especially suitable for patients with maxillofacial tumor surgery + radiotherapy. The treatment and maintenance of peri-implantitis are relatively convenient. The implant can be loaded immediately after fixation, quickly restore the aesthetic effect, and shorten the treatment cycle. It should also be noted that the threaded hole 43 inside the base 4 can be formed by cutting technology at the end of the base 4 after the bracket 1 and the base 4 are integrally formed.

[0031] In some embodiments, the bracket 1 includes a main structure 11 and a plurality of openings 12 arranged inside the main structure 11 , and the base 4 is disposed on the main structure 11 .

[0032] Specifically, the opening 12 allows the mucoperiosteum and alveolar bone to directly fit together after the implant is fixed on the maxillofacial bone, thereby establishing blood supply and ensuring that the soft tissue has sufficient nutrition. At the same time, the opening 12 can also reduce the weight of the implant and increase the comfort of the patient.

[0033] In some embodiments, the main structure 11 is arranged in a grid shape, the grid holes of the main structure 11 form openings 12 , and the base 4 is disposed at the grid nodes of the main structure 11 .

[0034] Specifically, the main structure 11 is arranged in a grid shape, and the grid nodes of the main structure 11 are the intersections of adjacent openings 12. The base 4 is arranged on the grid nodes to stabilize the shape of the bracket 1, increase the contact area with the alveolar ridge, and facilitate a more even distribution of the chewing force.

[0035] In some embodiments, the base 4 includes a transgingival segment 41 connected to the bracket 1 and a fixing segment 42 connected to the transgingival segment 41 , and the threaded hole 43 coaxially penetrates the transgingival segment 41 and the fixing segment 42 .

[0036] Specifically, after the implant is fixed, the gingival section 41 of the base 4 passes through the gums, the fixing section 42 is exposed outside the gums, and the screw is fixed to the maxillofacial bone through the threaded hole 43 in the center of the fixing section 42, thereby increasing the stability of the bracket 1 after installation.

[0037] In some embodiments, the diameter of the gingival segment 41 is less than 3 mm, and the thickness of the gingival segment 41 is not less than 1 mm. The thickness of the gingival segment 41 is not less than 1 mm to ensure the strength of the gingival segment 41, and it is not easy to cause fatigue or breakage during long-term use.

[0038] In some embodiments, the fixing section 42 is a truncated cone structure with an outer diameter gradually decreasing away from the transgingival section 41 . An annular boss is further provided on the outer wall of the fixing section 42 . The annular boss is arranged at one end of the fixing section 42 close to the transgingival section 41 .

[0039] Specifically, the fixing section 42 adopts a truncated cone structure with a gradually decreasing outer diameter, and its shape is close to the shape of teeth, which provides a good oral experience. The annular boss can contact the gums, limiting the length of the fixing section 42 exposed outside the gums.

[0040] In some embodiments, the rear wing 3 is in a triangular structure, and the end of the rear wing 3 away from the bracket 1 is in an arc shape.

[0041] Specifically, the long side of the posterior wing 3 is integrated with the bracket 1, and the end away from the bracket 1 is arc-shaped, wherein the junction between the posterior wing 3 and the main structure 11 of the bracket 1 is also arc-shaped, which can make the posterior wing 3 fit better with the palatal side of the posterior teeth of the maxillary bone, and the arc setting of the end can make the posterior wing 3 smoother when in contact with other parts of the oral cavity, reducing discomfort, thereby ensuring safety during subsequent use and repair.

[0042] In some embodiments, the bracket 1, the front wing 2, the rear wing 3 and the base 4 are printed using grade 4 titanium powder through selective electron beam melting technology.

[0043] Specifically, in this embodiment, the specific shape and thickness of the front wing 2 and the rear wing 3 can be personalized according to the condition of the patient's alveolar ridge to match the oral shape of different patients. The implant is personalized by 3D printing and is manufactured as a whole using selective electron beam melting technology to increase the accuracy of the implant. In terms of material, grade 4 titanium powder is used for printing, which has higher strength.

[0044] In summary, the embodiment of the utility model provides a Z-shaped subperiosteal implant, whose bracket 1 can be fixed to the maxillary bone by screws using the threaded hole 43, and the front wing 2 and the rear wing 3 can be fixed to the canine support and the surface of the palatine bone through the nail hole 5. The implant belongs to a fixed denture, and the chewing effect after repair is better than that of a removable denture. The canine support and the palatine bone are selected as the implantation site. Even if the alveolar bone is severely absorbed, the bone in this site still exists, and absorption and reconstruction rarely occur, and the implant retention and stability are good; the front wing 2, the rear wing 3 and the bracket 1 are all three-dimensional structures that imitate the human body. The bracket 1 can fit tightly to the surface of the maxillary bone, and the front wing 2 and the rear wing 3 can fit tightly to the surfaces of the canine support and the palatine bone respectively. The implant does not pass through the mucosa of the maxillary sinus and other structures, and will not cause secondary infection. At the same time, because the implant is attached to the surface of the maxillary bone instead of being implanted in the bone, the implant can extend to the posterior part of the alveolar bone, reducing the formation of cantilever. The posterior wing 3 is arranged on the palatal side of the maxillary posterior teeth area and the palatal bone surface, which can avoid large flap surgery in the buccal zygomatic alveolar ridge area. The surgical process is optimized by optimizing the results of the implant, thereby reducing the difficulty and time of the operation. The posterior wing 3 is arranged on the palatal side of the maxillary posterior teeth area and the palatal bone surface, which can also avoid causing soft tissue recession, ensure the sealing effect of the subperiosteal implant soft tissue, reduce the probability of peri-implantitis, and facilitate subsequent repair and maintenance.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A Z-shaped subperiosteal implant, characterized in that: It comprises a bracket, a front wing and a rear wing connected to the bracket, wherein the front wing, the rear wing and the bracket are a three-dimensional structure that conforms to the upper jaw of a human body; The bracket is used to be attached to the surface of the maxillary bone, and the bracket is provided with a plurality of abutments along its length direction, and one end of the abutment away from the bracket penetrates into the gums to fix the bracket; The front wing and the rear wing are respectively arranged on both sides of the width direction of the bracket. The front wing is used to be attached and fixed to the surface of the canine support of the maxilla, and the rear wing is located on the side of the greater palatine foramen close to the maxilla and is used to be attached and fixed to the palatal side of the posterior teeth area of ​​the maxilla and the surface of the palatine bone.

2. The Z-shaped subperiosteal implant according to claim 1, characterized in that: The front wing and the rear wing are both provided with a plurality of nail holes for inserting micro screws at intervals.

3. The Z-shaped subperiosteal implant according to claim 1, characterized in that: The interior of the base is provided with a threaded hole for screw fixing.

4. The Z-shaped subperiosteal implant according to claim 3, characterized in that: The bracket comprises a main structure and a plurality of openings arranged inside the main structure, and the base is arranged on the main structure.

5. The Z-shaped subperiosteal implant according to claim 4, characterized in that: The main structure is arranged in a grid shape, the grid holes of the main structure form the openings, and the base is arranged at the grid nodes of the main structure.

6. The Z-shaped subperiosteal implant according to any one of claims 3 to 5, characterized in that: The base comprises a transgingival section connected to the bracket and a fixing section connected to the transgingival section, and the threaded hole coaxially penetrates the transgingival section and the fixing section.

7. The Z-shaped subperiosteal implant according to claim 6, characterized in that: The diameter of the transgingival segment is less than 3 mm, and the thickness of the transgingival segment is not less than 1 mm.

8. The Z-shaped subperiosteal implant according to claim 6, characterized in that: The fixing section is a truncated cone structure with an outer diameter gradually decreasing away from the gingival section. An annular boss is further provided on the outer wall of the fixing section. The annular boss is arranged at one end of the fixing section close to the gingival section.

9. The Z-shaped subperiosteal implant according to claim 1, characterized in that: The rear wing is in a triangular structure, and the end of the rear wing away from the bracket is in an arc shape.

10. The Z-shaped subperiosteal implant according to claim 1, characterized in that: The bracket, front wing, rear wing and base are printed and formed using grade 4 titanium powder through selective electron beam melting technology.

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