Subperiosteal implants
By using a shape memory alloy bracket to install a subperiosteal implant on the alveolar bone, the problem of concave hindering the installation of the alveolar bone is solved, and the effect of damage-free installation is achieved.
Patent Information
- Application Number
- CN202421218727.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-05-30
AI Technical Summary
The shape of the alveolar bone is complicated after the defect, and there is a protruding concave on the lip side of the alveolar bone, which makes it difficult to install the subperiosteal implant. The existing method requires smoothing the concave and losing the alveolar bone.
The shape memory alloy bracket is used to cool down to the phase change temperature range, so that the bracket is in a deformed state, and the groove is opened with external force, and put it on the alveolar bone with concave, and then heat it up to the restoration temperature range to restore the bracket and restore the groove to fit the alveolar bone as it is.
The stable installation of the subperiosteal implant is achieved without the need to smooth the concave on the alveolar bone, reducing the loss of the alveolar bone.
Smart Images
Figure CN222723151U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of dental implants, in particular to a subperiosteal implant. Background Art
[0002] Subperiosteal implants are implants between the periosteum and the bone surface. They are fixed to the alveolar bone by bone screws and do not need to be implanted into the alveolar bone. When the patient's alveolar bone defect is severe and is not suitable for traditional implants and guided bone regeneration technology, subperiosteal implants are a suitable option. As an implant alternative in cases of severe bone defects, subperiosteal implants have the characteristics of short cycle, fast recovery, and are not affected by the shape of the jaw. The characteristic of subperiosteal implants is customization. Their appearance and shape fit the patient's jaw surface. Their fixed arms usually extend to the bone surface with better bone quality and thicker bone arms to ensure the stability of the implant. Therefore, this type of implant is generally a curved scaffold structure.
[0003] For some alveolar bone defects with complex shapes, there is a convex undercut on the labial side of the alveolar bone, that is, the cross-sectional width of the upper part of the alveolar bone is greater than that of the lower part. The undercut of the alveolar bone will hinder the installation of the subperiosteal implant, that is, the undercut will block the lower opening of the implant and prevent it from being installed. To address this problem, the existing method is to grind the undercut flat, which will cause a loss of part of the alveolar bone, further reducing the patient's original alveolar bone defect. Utility Model Content
[0004] The utility model aims to provide a subperiosteal implant to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.
[0005] The technical solutions adopted to solve the above technical problems are:
[0006] A subperiosteal implant comprises a shape memory alloy bracket and a base arranged on the top of the shape memory alloy bracket, the bottom of the shape memory alloy bracket is provided with a groove for fitting the alveolar bone, and the shape memory alloy bracket has a deformation state and a recovery state;
[0007] When the shape memory alloy support is within the phase change temperature range, the shape memory alloy support is in the deformed state, and the notch of the groove is deformed after force is applied;
[0008] When the shape memory alloy support is within the recovery temperature range, the shape memory alloy support is in the recovery state, and the groove returns to its original state.
[0009] The beneficial effects of the utility model are as follows: for some alveolar bone defects with complex shapes, there is a convex undercut on the labial side of the alveolar bone, that is, the cross-sectional width of the upper part of the alveolar bone is greater than that of the lower part, and the undercut of the alveolar bone will hinder the installation of the subperiosteal implant; for this purpose, the shape memory alloy bracket is cooled to a phase change temperature range, so that the shape memory alloy bracket is transformed into a deformed state, and then the groove of the shape memory alloy bracket is opened outward by an external force, so that the groove of the shape memory alloy bracket can be sleeved on the alveolar bone with the undercut, and then the shape memory alloy bracket is heated by the oral temperature or the shape memory alloy bracket is heated by an external heater, so that the temperature of the shape memory alloy bracket is increased to a recovery temperature range, due to the characteristics of the shape memory alloy, the shape memory alloy bracket is transformed into a recovery state, and the groove is restored to its original state and fits the alveolar bone and the undercut on the alveolar bone, and finally a bone screw is screwed in to fix the shape memory alloy bracket to complete the installation of the subperiosteal implant; the subperiosteal implant of the utility model does not need to be smoothed on the undercut on the alveolar bone during installation, which helps to reduce the loss of alveolar bone.
[0010] As a further improvement of the above technical solution, the groove is through-going along the front-to-back direction, and a concave cavity is provided on the inner side wall of the groove.
[0011] As a further improvement of the above technical solution, the groove is divided into an upper section and a lower section from top to bottom, and the concave cavity is located in the upper section.
[0012] As a further improvement of the above technical solution, the width of the upper section in the left-right direction is greater than the width of the lower section in the left-right direction.
[0013] As a further improvement of the above technical solution, the width of the lower section gradually decreases from top to bottom.
[0014] As a further improvement of the above technical solution, the shape memory alloy bracket is provided with a plurality of connection holes for positioning bone screws, the plurality of connection holes are distributed on the periphery of the base, and the connection holes are staggered with the concave cavity.
[0015] As a further improvement of the above technical solution, the thickness of the shape memory alloy bracket is uniform.
[0016] As a further improvement of the above technical solution, the phase change temperature range is greater than or equal to 10°C and less than or equal to 20°C, and the recovery temperature range is greater than or equal to 35°C.
[0017] As a further improvement of the above technical solution, the shape memory alloy bracket is provided with a plurality of through holes.
[0018] As a further improvement of the above technical solution, the base is located in the middle of the shape memory alloy bracket. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments;
[0020] Figure 1 This is a schematic structural diagram of the subperiosteal implant provided by the utility model in a restored state;
[0021] Figure 2 It is a structural schematic diagram of the subperiosteal implant provided by the utility model in a restored state from another angle;
[0022] Figure 3 This is a schematic structural diagram of the subperiosteal implant provided by the utility model in a deformed state;
[0023] Figure 4 It is a schematic diagram of the structure with undercut on the alveolar bone;
[0024] Figure 5 It is a schematic diagram of the structure of the subperiosteal implant provided by the utility model being installed in the alveolar bone;
[0025] Figure 6 It is a structural schematic diagram of another angle of the subperiosteal implant provided by the utility model being installed in the alveolar bone.
[0026] 10. alveolar bone, 11. undercut, 100. shape memory alloy bracket, 110. groove, 111. upper section, 112. lower section, 120. cavity, 130. connecting hole, 140. through hole, 200. base. DETAILED DESCRIPTION
[0027] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.
[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0029] In the description of the present utility model, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood to exclude the number, and above, below, within, etc. are understood to include the number.
[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0031] Reference Figures 1 to 6 The subperiosteal implant of the utility model is made into the following embodiments:
[0032] The subperiosteal implant includes a shape memory alloy bracket 100 and a base 200. The base 200 is arranged on the top of the shape memory alloy bracket 100. The shape memory alloy bracket 100 is a plate-like structure. The left and right sides of the shape memory alloy bracket 100 are bent downward to form a groove 110. The shape of the groove 110 matches the shape of the alveolar bone 10.
[0033] The shape memory alloy bracket 100 is in a deformed state or a restored state under the influence of temperature.
[0034] When the temperature of the shape memory alloy bracket 100 is within the phase change temperature range, the shape memory alloy bracket 100 enters a deformation state, and the shape memory alloy bracket 100 can be pulled and deformed by an external force to open the groove 110 at the bottom of the shape memory alloy bracket 100 so that the groove 110 can be inserted into the alveolar bone 10 with the undercut 11.
[0035] When the temperature of the shape memory alloy bracket 100 is within the recovery temperature range, the shape memory alloy bracket 100 enters a recovery state, and the shape of the shape memory alloy bracket 100 gradually returns to its original shape, so that the groove 110 recovers and fits onto the alveolar bone 10 with the undercut 11 .
[0036] For some alveolar bones 10 with complex shapes after defect, there is a protruding undercut 11 on the labial side of the alveolar bone 10, that is, the cross-sectional width of the upper part of the alveolar bone 10 is greater than that of the lower part. The undercut 11 of the alveolar bone 10 will hinder the installation of the subperiosteal implant.
[0037] To this end, the shape memory alloy bracket 100 is cooled to a phase change temperature range, so that the shape memory alloy bracket 100 is transformed into a deformed state, and then the groove 110 of the shape memory alloy bracket 100 is opened outward by an external force, so that the groove 110 of the shape memory alloy bracket 100 can be mounted on the alveolar bone 10 with the undercut 11, and then the shape memory alloy bracket 100 is heated by the oral temperature or the shape memory alloy bracket 100 is heated by an external heater, so that the temperature of the shape memory alloy bracket 100 is increased to a recovery temperature range, and due to the characteristics of the shape memory alloy, the shape memory alloy bracket 100 is transformed into a recovery state, and the groove 110 is restored to its original state and fits the alveolar bone 10 and the undercut 11 on the alveolar bone 10, and finally a bone screw is screwed in to fix the shape memory alloy bracket 100 to complete the installation of the subperiosteal implant; the subperiosteal implant of the utility model does not need to be smoothed on the undercut 11 on the alveolar bone 10 during installation, which helps to reduce the loss of the alveolar bone 10.
[0038] In this embodiment, in order to ensure that the shape memory alloy bracket 100 can accurately fit to the alveolar bone 10, the alveolar bone 10 and the undercut 11 can be three-dimensionally scanned first. After obtaining the three-dimensional model of the alveolar bone 10, the groove 110 of the shape memory alloy bracket 100 is designed according to the three-dimensional model of the alveolar bone 10 so that the shape of the groove 110 matches the shape of the alveolar bone 10, and then the shape memory alloy bracket 100 is manufactured by 3D printing.
[0039] In some embodiments, the groove 110 is through from front to back, and a cavity 120 is disposed on a left inner wall or a right inner wall of the groove 110 .
[0040] The shape of the cavity 120 on the left inner wall or the right inner wall of the groove 110 matches the shape of the undercut 11 of the alveolar bone 10, so that the undercut 11 and the cavity 120 cooperate to form a clamping structure between the groove 110 and the alveolar bone 10, thereby helping the shape memory alloy bracket 100 to be more firmly installed on the alveolar bone 10.
[0041] In some embodiments, the groove 110 is divided into an upper section 111 and a lower section 112 along the up-down direction, and the cavity 120 is disposed in the upper section 111 .
[0042] The cavity 120 is disposed in the upper section 111 of the groove 110 , and the lower section 112 is fitted to the bone surface below the undercut 11 , so that the undercut 11 can prevent the lower section 112 from sliding upward, and the shape memory alloy bracket 100 is more firmly installed on the alveolar bone 10 .
[0043] In some embodiments, the width of the lower segment 112 is smaller than the width of the upper segment 111 .
[0044] The groove 110 that is larger at the top and smaller at the bottom is formed to help the groove 110 to be clamped on the alveolar bone 10 that is larger at the top and smaller at the bottom, so that the shape memory alloy bracket 100 is more firmly installed on the alveolar bone 10 .
[0045] In some embodiments, the width of the lower section 112 gradually decreases from top to bottom.
[0046] The lower section 112 gradually narrows from top to bottom so as to fit the lower end of the alveolar bone 10 . The narrowed lower section 112 is used to clamp the alveolar bone 10 , so that the shape memory alloy bracket 100 is more firmly installed on the alveolar bone 10 .
[0047] In some embodiments, the shape memory alloy stent 100 is provided with a plurality of connection holes 130 , which are used to position bone screws. The connection holes 130 are distributed on the periphery of the base 200 , and the positions of the connection holes 130 are staggered with the positions of the concave cavities 120 .
[0048] The bone screw passes through the connecting hole 130 and is screwed into the alveolar bone 10. The connecting holes 130 are distributed on the periphery of the base 200 to fix the position of the base 200 and prevent the base 200 from loosening. The position of the connecting hole 130 is staggered with the position of the cavity 120 to prevent the bone screw from being screwed into the undercut 11 that fits the cavity 120. Due to the structural strength angle of the convex part of the undercut 11, if the bone screw is screwed in, the undercut 11 is easily damaged, causing the bone screw to loosen and affecting the fixation of the shape memory alloy stent 100.
[0049] In some embodiments, the thickness of the shape memory alloy stent 100 is uniform.
[0050] When the shape memory alloy stent 100 returns to its original shape, the uniform thickness can ensure that the restored shape is more accurate.
[0051] In some embodiments, the phase transition temperature ranges from 10°C to 20°C, and the recovery temperature ranges from more than 35°C.
[0052] The temperature of the shape memory alloy bracket 100 is lowered to between 10°C and 20°C, and then the groove 110 of the shape memory alloy bracket 100 is stretched and mounted on the alveolar bone 10 to prevent the temperature of the shape memory alloy bracket 100 from being too low and causing frostbite to the soft tissue around the alveolar bone 10, and the temperature is within the tolerable temperature range of the human oral cavity; the human oral cavity temperature is generally 37°C, and the shape memory alloy bracket 100 can be heated by the oral temperature, so that after the shape memory alloy bracket 100 is heated to above 35°C, the shape memory alloy bracket 100 can be restored to its original state and fit to the alveolar bone 10; the phase change temperature range and the recovery temperature range of the shape memory alloy bracket 100 are both within the tolerable temperature range of the human oral cavity, so that the installation of the shape memory alloy bracket 100 to the alveolar bone 10 can be smoothly implemented.
[0053] In some embodiments, the shape memory alloy bracket 100 is provided with a plurality of through holes 140 , and the through holes 140 pass through the shape memory alloy bracket 100 .
[0054] The existence of the through hole 140 is beneficial to the blood supply of the soft tissue to the alveolar bone 10 after implantation.
[0055] In some embodiments, the base 200 is disposed in the middle of the shape memory alloy stent 100 .
[0056] After the shape memory alloy bracket 100 is fixed to the alveolar bone 10 , the base 200 located in the middle of the shape memory alloy bracket 100 can be more stable, and the crown can be more stable when installed on the base 200 .
[0057] The preferred implementation modes of the present invention are specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.
Claims
1. A subperiosteal implant, characterized in that: It comprises a shape memory alloy bracket and a base arranged on the top of the shape memory alloy bracket, the bottom of the shape memory alloy bracket is provided with a groove for fitting the alveolar bone, and the shape memory alloy bracket has a deformation state and a recovery state; When the shape memory alloy support is within the phase change temperature range, the shape memory alloy support is in the deformed state, and the notch of the groove is deformed after force is applied; When the shape memory alloy support is within the recovery temperature range, the shape memory alloy support is in the recovery state, and the groove returns to its original state.
2. The subperiosteal implant according to claim 1, characterized in that: The groove is through-going along the front-back direction, and a concave cavity is arranged on the inner side wall of the groove.
3. The subperiosteal implant according to claim 2, characterized in that: The groove is divided into an upper section and a lower section from top to bottom, and the concave cavity is located in the upper section.
4. The subperiosteal implant according to claim 3, characterized in that: The width of the upper section in the left-right direction is greater than the width of the lower section in the left-right direction.
5. The subperiosteal implant according to claim 3, characterized in that: The width of the lower section gradually decreases from top to bottom.
6. The subperiosteal implant according to claim 2, characterized in that: The shape memory alloy support is provided with a plurality of connection holes for positioning bone screws, the plurality of connection holes are distributed on the periphery of the base, and the connection holes are staggered with the concave cavity.
7. The subperiosteal implant according to claim 1, characterized in that: The shape memory alloy bracket has uniform thickness.
8. The subperiosteal implant according to claim 1, characterized in that: The phase change temperature range is greater than or equal to 10°C and less than or equal to 20°C, and the recovery temperature range is greater than or equal to 35°C.
9. The subperiosteal implant according to claim 1, characterized in that: The shape memory alloy bracket is provided with a plurality of through holes.
10. The subperiosteal implant according to claim 1, characterized in that: The base is located in the middle of the shape memory alloy support.