An oral abutment screw
By designing a bone post fixation screw for the oral cavity, and utilizing the self-tapping thread structure of the fixation part and the screw body, the contact area is increased and stress is dispersed, which solves the problem of unstable fixation of existing bone screws and achieves the effect of stable fixation and avoidance of damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SOUTHERN MEDICAL UNIV STOMATOLOGICAL HOSPITAL (GUANGDONG STOMATOLOGICAL HOSPITAL GUANGDONG DENTAL DISEASE PREVENTION & TREATMENT GUIDANCE CENT)
- Filing Date
- 2025-05-23
- Publication Date
- 2026-06-30
AI Technical Summary
Existing bone screw fixation methods have a small area, making it difficult to adapt to complex bone surface morphology and unable to distribute stress, which may lead to bone column damage and soft tissue perforation.
A bone column fixation screw for oral cavity is designed, which is equipped with a fixing part and a screw body. The screw body has self-tapping threads on its surface to increase the contact area with the bone column. It is fixed by the screw head and screw rod, which can adapt to complex bone surface morphology, distribute stress, and avoid secondary damage.
It increases the fixation area of the bone column, adapts to complex bone surface morphology, avoids secondary damage to the bone column and soft tissue perforation, and improves the fixation effect.
Smart Images
Figure CN224421189U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to a bone column fixation screw for oral cavity. Background Technology
[0002] Currently, dental implant surgery is the most important treatment for missing teeth. However, due to inflammation and atrophy, insufficient bone volume is often encountered during implant surgery. Bone column technology is a reliable method for bone augmentation in dental implant surgery, especially suitable for small-area bone defects. Using autologous bone columns can achieve better and faster results than conventional GBR surgery. This technique involves obtaining columnar or sheet-like bone blocks in situ at the implant site or elsewhere, and fixing them to the bone defect area using bone screws to increase horizontal or vertical bone volume, ultimately achieving excellent implant results.
[0003] Current methods of bone column fixation often rely on bone screws. Specifically, multiple bone screws are used to fix the bone column to the recipient area, and then the screw heads are used to interlock the bone column, forming a locking mechanism to secure it, as seen in the Chinese Patent Publication No. CN308978064S bone screw. However, this type of bone screw has the following drawbacks: 1. The fixation area is relatively small, making it difficult to achieve stable fixation using mechanical shapes, and it is difficult to adapt to complex bone surface morphologies, requiring a high level of experience from the surgeon; 2. Current bone screw fixation cannot achieve horizontal stress distribution on the fixed bone column, potentially leading to structural damage during fixation; 3. The sharp edges of current bone screws easily create stress points on convex surfaces, which may cause soft tissue perforation during healing.
[0004] Therefore, it is essential to provide an oral cavity bone column fixation screw to address the shortcomings of existing technologies. Utility Model Content
[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an oral cavity bone column retention screw. This oral cavity bone column retention screw can increase the locking area with the bone column, avoid secondary damage to the bone column during operation, and can also adapt to complex bone surface morphologies.
[0006] The above-mentioned objectives of this utility model are achieved through the following technical measures:
[0007] A bone column fixation screw for oral cavity is provided, comprising a fixing part for increasing the contact area with the bone column to fix the bone column and a nail body for fixing to the bone structure inside the oral cavity, wherein the fixing part is connected to the top end of the nail body.
[0008] The surface of the nail body is provided with self-tapping threads.
[0009] The nail is attached to the edge of the fixing part.
[0010] Preferably, the shape of the fixing part is semi-circular, and the nail body passes through the center of the semi-circle.
[0011] Preferably, the thickness of the aforementioned fixing part is inversely proportional to the distance from the center of the circle.
[0012] Within the area of the fixed part, the area within a distance A from the arc edge of the fixed part is defined as the wrapping area. The thickness of the wrapping area is defined as B, and the maximum thickness of the fixed part is defined as C. There exists 0.1C≤B≤0.5C, 1mm≤A≤3mm, and 1mm≤C≤3mm.
[0013] Preferably, the fixing part is provided with three extension arms, one end of each of the three extension arms is integrally connected, the integral connection point of the three extension arms is defined as the connection point, and the nail body passes through the connection point.
[0014] The three extension arms are defined as the first extension arm, the second extension arm, and the third extension arm, respectively. The extension line of the first extension arm overlaps with the extension line of the second extension arm. The third extension arm is perpendicular to both the first and second extension arms, and the first, second, and third extension arms are all in the same plane.
[0015] Preferably, the thickness of the aforementioned fixing part is defined as D, where 1mm ≤ D ≤ 3mm.
[0016] Preferably, the nail body is provided with a nail head and a screw, wherein the nail head is integrally connected to the top end of the screw.
[0017] Preferably, the fixing part is fixedly connected to the top end of the screw; the fixed connection is fusion or welding.
[0018] Preferably, the aforementioned nail head is fixedly embedded in the upper surface of the fixing part.
[0019] Preferably, the nail body and the fixing part are detachably connected, and the detachable connection is a plug-in connection.
[0020] Preferably, the fixing part is provided with a through hole for the nail body to pass through, the through hole is located at the edge of the fixing part, and the nail body can be detachably passed through the through hole.
[0021] Preferably, the fixing part is integrally connected with barbs for bone column insertion, and the barbs are located on the lower surface of the fixing part.
[0022] The maximum length of the fixing part is defined as L, and there exists a range of 3mm ≤ L ≤ 10mm.
[0023] The height H of the nail body is defined as 6mm≤H≤10mm.
[0024] The diameter d of the nail body is defined as 1.2mm≤d≤1.5mm.
[0025] Preferably, the fixing part is a fixing part that has undergone surface smoothing treatment.
[0026] Preferably, the nail head of the nail body is a nail head that has undergone surface smoothing treatment.
[0027] This invention relates to an oral cavity bone post fixation screw, comprising a fixing part for increasing the contact area with the bone post to fix the bone post, and a nail body for fixing to the bone structure inside the oral cavity. The fixing part is connected to the top end of the nail body; the surface of the nail body is provided with self-tapping threads; the nail body is connected to the edge of the fixing part. This oral cavity bone post fixation screw can increase the locking area with the bone post, disperse the stress on the bone post, avoid secondary damage to the bone post during operation, and can also adapt to complex bone surface morphologies. Attached Figure Description
[0028] The present invention will be further described with reference to the accompanying drawings, but the content of the drawings does not constitute any limitation on the present invention.
[0029] Figure 1 This is a schematic diagram of the dental bone column fixation screw of Example 1.
[0030] Figure 2 for Figure 1 Another perspective diagram.
[0031] Figure 3 This is a schematic diagram of the use of dental bone column fixation screws.
[0032] Figure 4 This is a schematic diagram of the oral cavity bone column fixation screw of Example 2.
[0033] Figure 5 for Figure 4 Another perspective diagram.
[0034] Figure 6 This is a schematic diagram of the oral cavity bone column fixation screw of Example 3.
[0035] Figure 7 for Figure 6 A schematic diagram of the central fixing part.
[0036] Figure 8 This is a schematic diagram of the nail body.
[0037] Figure 9 This is a schematic diagram of the oral cavity bone column fixation screw of Example 3.
[0038] Figure 10 for Figure 9 A schematic diagram of the central fixing part.
[0039] Figure 11 This is a schematic diagram of the oral cavity bone column fixation screw of Example 4.
[0040] exist Figures 1 to 11 This includes:
[0041] Fixing part 100, extension arm 110, through hole 120, barb 130, wrapping area 140, nail body 200, nail head 210, screw 220.
[0042] 300 bone columns. Detailed Implementation
[0043] The technical solution of this utility model will be further explained with reference to the following embodiments.
[0044] Example 1
[0045] A type of dental bone column retention screw, such as Figures 1 to 2 As shown, the device includes a fixing part 100 for increasing the contact area with the bone column 300 to fix the bone column 300, and a nail body 200 for fixing to the bone structure inside the oral cavity. The fixing part 100 is connected to the top end of the nail body 200. The surface of the nail body 200 is provided with self-tapping threads. The nail body 200 is connected to the edge of the fixing part 100. The fixing part 100 is semi-circular in shape, and the nail body 200 passes through the center of the semi-circle.
[0046] The direction in which the screw body 200 is screwed into the bone structure inside the oral cavity is defined as below the oral cavity bone column retention screw.
[0047] It should be noted that in actual use, the screw body 200 of the oral cavity bone column fixation screw of this invention is screwed into the oral cavity bone structure near the bone column 300, and then the surface of the bone column 300 is fixed to the lower surface of the fixing part 100. Because the oral cavity bone column fixation screw of this invention additionally increases the contact area between the oral cavity bone column fixation screw and the bone column 300, such as... Figure 3 This disperses the stress on the bone column 300, avoiding secondary damage to the bone column 300 during operation, and the fixation part 100 also adapts to complex bone surface morphology.
[0048] The specific nail body 200 is provided with a nail head 210 and a screw 220, with the nail head 210 integrally connected to the top end of the screw 220. The fixing part 100 is fixedly connected to the top end of the screw 220; the fixed connection is by fusion or welding. The nail head 210 is fixedly embedded in the upper surface of the fixing part 100.
[0049] It should be noted that in this embodiment, the screw 220 and the nail head 210 are integrally connected. Therefore, when the nail body 200 rotates, the fixing part 100 also rotates. Due to the flexibility of the bone structure inside the oral cavity, the fixing part 100 can be locked onto the surface of the bone column 300 by over-tightening or under-tightening. In other words, the fixing part 100 can be locked in the target position by over-tightening or under-tightening the nail body 200 by one more turn or one less turn. This integral connection between the screw 220 and the nail head 210 has the advantage of simple manufacturing process.
[0050] The thickness of the fixing part 100 is inversely proportional to the distance from the center of the circle.
[0051] Within the area of the fixing part 100, the area within a distance A from the arc edge of the fixing part 100 is defined as the wrapping area. The thickness of the wrapping area is defined as B, and the maximum thickness of the fixing part 100 is defined as C. There exists a condition 0.1C≤B≤0.5C, and 1mm≤A≤3mm, 1mm≤C≤3mm.
[0052] It should be noted that the thickness of the wrapping area is minimal, and the purpose of this thickness is to give this area high plasticity, so that it can be easily bent during use to achieve reinforced wrapping of the bone column 300.
[0053] The maximum length of the fixing part 100 is defined as L, and there exists 3mm≤L≤10mm; the height of the nail body 200 is defined as H, and there exists 6mm≤H≤10mm; the diameter of the nail body 200 is defined as d, and there exists 1.2mm≤d≤1.5mm.
[0054] It should be noted that, as proven by clinical use, when the maximum length of the fixation part 100 is within the above-mentioned range, it can effectively fix the mainstream-sized bone column 300. If it is too large, the fixation part 100 will be suspended and damage soft tissue; if it is too small, it will not be able to stabilize the bone column 300. Moreover, when the height and diameter of the nail body 200 are within the above-mentioned range, it can be effectively fixed to the bone structure inside the oral cavity.
[0055] The fixing part 100 is a fixing part 100 with a smooth surface treatment; the nail head 210 of the nail body 200 is a nail head 210 with a smooth surface treatment. The surface smoothing treatment is mechanical polishing, such as sanding the surface with sandpaper, polishing paste, etc.
[0056] It should be noted that the function of the surface-smoothed fixing part 100 and the surface-smoothed nail head 210 is to avoid stress points and prevent soft tissue perforation during the healing process.
[0057] This oral cavity bone column fixation screw increases the contact area with the bone column 300, dispersing the stress on the bone column 300 and preventing secondary damage to the bone column 300 during operation. It can also adapt to complex bone surface morphologies. This oral cavity bone column fixation screw also avoids stress points, effectively preventing soft tissue perforation during healing.
[0058] Example 2
[0059] A type of dental bone column retention screw, such as Figure 4 and Figure 5 As shown, other features are the same as in Embodiment 1, except that: the fixing part 100 is provided with three extension arms 110, one end of each of the three extension arms 110 is integrally connected, and the integral connection point of the three extension arms 110 is defined as the connection point, and the nail body 200 passes through the connection point. The three extension arms 110 are defined as the first extension arm 110, the second extension arm 110, and the third extension arm 110, respectively. The extension line of the first extension arm 110 overlaps with the extension line of the second extension arm 110, and the third extension arm 110 is perpendicular to both the first and second extension arms 110, and all three extension arms 110 are in the same plane. The thickness of the fixing part 100 is defined as D, where 1mm ≤ D ≤ 3mm.
[0060] Compared with Embodiment 1, the fixing part 100 in this embodiment is configured with three extension arms 110. The advantage of this is that it improves the deformation performance of the fixing part 100, thereby better wrapping the bone column 300, further improving the adaptability to complex bone surface morphology, and also allows for the adaptation of different bone column 300 sizes by cutting the extension arms 110.
[0061] Example 3
[0062] A type of dental bone column retention screw, such as Figures 6 to 10 As shown, other features are the same as in Embodiment 1 or 2, except that the nail body 200 and the fixing part 100 are detachably connected, and the detachable connection is a plug-in connection.
[0063] like Figure 7 and Figure 10 As shown, the fixing part 100 is provided with a through hole 120 for the nail body 200 to pass through. The through hole 120 is located at the edge of the fixing part 100, and the nail body 200 can be detachably passed through the through hole 120.
[0064] In this embodiment, the fixing part 100 serves as a spacer between the nail body 200 and the bone column 300. The nail body 200 is inserted through the through hole 120, and then rotated until most of it enters the bone structure inside the oral cavity. The fixing part 100 is then fixed by friction, and the bone column 300 is secured by the clamping force of the fixing part 100. Therefore, in this embodiment, the fixing part 100 does not rotate when the nail body 200 is screwed in, eliminating the need for excessive or insufficient twisting to lock the fixing part 100 onto the surface of the bone column 300, thus improving the flexibility of use.
[0065] Example 4
[0066] A type of dental bone column retention screw, such as Figure 11 As shown, other features are the same as in Embodiment 3, except that: since the fixing part 100 does not rotate when the nail body 200 is screwed in, the fixing part 100 in this embodiment can also be integrally connected with a barb 130 for insertion of the bone column 300. The barb 130 is located on the lower surface of the fixing part 100. This embodiment is described using a semi-circular shape for the fixing part 100 as an example.
[0067] It should also be noted that if the fixing part 100 is integrally connected with the nail body 200, the barb 130 of the fixing part 100 will rotate with the rotation of the nail body 200, which may cause damage to the bone column 300 or the tissues inside the mouth. Therefore, the integral connection method is not suitable for the barb 130.
[0068] The barbs 130 in this embodiment can further increase the stability with the bone column 300, thereby reducing the use of oral bone column fixation screws.
[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.
Claims
1. An oral abutment screw, characterized by: The device is provided with a fixing part for increasing the contact area with the bone column to fix the bone column and a nail body for fixing to the bone structure inside the oral cavity, wherein the fixing part is connected to the top end of the nail body; The surface of the nail body is provided with self-tapping threads; The nail is attached to the edge of the fixing part.
2. The dental abutment screw according to claim 1, characterized in that: The fixing part is semi-circular in shape, and the nail body passes through the center of the semi-circle.
3. The oral endosseous screw of claim 2, wherein: The thickness of the fixing part is inversely proportional to the distance from the center of the circle; The area within the fixed part region, and within a distance A from the arc edge of the fixed part, is defined as the wrapping area. The thickness of the wrapping area is defined as B, and the maximum thickness of the fixed part is defined as C. There exists 0.1C≤B≤0.5C, and 1mm≤A≤3mm, 1mm≤C≤3mm.
4. The dental abutment screw of claim 1, wherein: The fixing part is provided with three extension arms, one end of each of the three extension arms is integrally connected, the integral connection of the three extension arms is defined as the connection point, and the nail body passes through the connection point. The three extension arms are defined as the first extension arm, the second extension arm, and the third extension arm, respectively. The extension line of the first extension arm overlaps with the extension line of the second extension arm. The third extension arm is perpendicular to both the first and second extension arms, and the first, second, and third extension arms are all in the same plane.
5. The oral endosseous screw of claim 4, wherein: The thickness of the fixing part is defined as D, where 1mm ≤ D ≤ 3mm.
6. The dental implant retaining screw according to any one of claims 1 to 5, characterized in that: The nail body is provided with a nail head and a screw, and the nail head is integrally connected to the top end of the screw; The fixing part is fixedly connected to the top end of the screw; the fixed connection is by fusion or welding; The nail head is fixedly embedded in the upper surface of the fixing part.
7. The oral cavity bone column retention screw according to any one of claims 1 to 5, characterized in that: The nail body and the fixing part are detachably connected, and the detachable connection is a plug-in connection.
8. The oral endosseous screw of claim 7, wherein: The fixing part is provided with a through hole for the nail body to pass through. The through hole is located at the edge of the fixing part, and the nail body can be detachably passed through the through hole. The fixing part is integrally connected with barbs for bone column insertion, and the barbs are located on the lower surface of the fixing part.
9. The dental implant retaining screw according to any one of claims 1 to 5, characterized in that: The maximum length of the fixing part is defined as L, where 3mm≤L≤10mm; The height H of the nail body is defined as 6mm≤H≤10mm; The diameter d of the nail body is defined as 1.2mm≤d≤1.5mm.
10. The dental implant retaining screw according to any one of claims 1 to 5, characterized in that: The fixing part is a fixing part that has undergone surface smoothing treatment; The nail head of the nail body is a nail head with a smooth surface treatment.