Skeleton trimming and positioning device

Abstract

The utility model discloses a bone sheet trimming and positioning device, which relates to the field of oral implant auxiliary instruments and comprises a lower positioning plate and an upper positioning plate detachably connected onto the lower positioning plate through a positioning component. At least one clamping and positioning area for trimming the bone sheet is formed between the opposite surfaces of the lower positioning plate and the upper positioning plate, and a lower positioning groove and an upper positioning piece which are matched with each other are arranged in the clamping and positioning area. The positioning device is compact in layout and convenient and fast to operate, stable positioning during bone sheet finishing is achieved, and compared with handheld operation in the prior art, operation safety is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of oral implant auxiliary instruments, in particular to a bone fragment trimming and positioning device. Background Art

[0002] In the field of oral implantology, insufficient alveolar bone is often encountered, necessitating bone augmentation techniques to increase the height and width of the alveolar bone to ensure successful implant placement. Bone augmentation techniques adhere to the classic PASS principles: tension-free wound closure, vascularization, creation of a bone graft space, and stability. Cortical bone grafting is considered an effective method for bone augmentation. This technique utilizes thin cortical bone grafts as a barrier to create a stable bone graft space, meeting the last two points of the PASS principle and having a promising application in patients with severe bone defects. By filling the stable space created by the bone graft with bone powder to minimize the cortical bone content, this facilitates the growth of new capillaries, effectively reducing the risk of bone resorption and osteonecrosis associated with full-thickness bone grafts. Furthermore, the bone graft can directly contact the alveolar bone and, after bone remodeling, becomes part of the alveolar bone, eliminating the need for additional surgical removal. Compared to titanium mesh and non-absorbable membranes, it offers the advantages of better biocompatibility and reduced surgical trauma.

[0003] When using bone chip technology, whether it is autologous bone chips or pre-made bone chips, they need to be pre-polished or punched according to the location, size, and shape of the patient's bone defect. After adjustment, the bone chip is fixed in the corresponding position in the mouth with titanium nails to ensure the stability of the bone chip. Using digital means, the position, size, and shape of the implanted bone chip can be simulated in advance, and a template of the ideal bone chip can be printed. The template and the bone chip are overlapped and the ideal bone chip is cut. However, this operation currently uses manual handheld tweezers or clamps for clamping and positioning. The stability of the bone chip is poor during trimming, which can easily lead to an unsatisfactory trimming shape and accidental injury.

[0004] Therefore, how to provide a bone fragment trimming and positioning device to achieve stable positioning during bone fragment trimming and improve safety, and the device can be clamped and fixed on a workbench or desktop, and is easy and quick to use, has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0005] The utility model aims to provide a bone fragment trimming and positioning device, which solves the problem of unstable positioning and poor safety of handheld bone fragment trimming in the prior art.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The utility model discloses a bone fragment trimming and positioning device, comprising a lower positioning plate and an upper positioning plate, wherein the upper positioning plate is detachably connected to the lower positioning plate through a positioning assembly, and at least one clamping positioning area for bone fragment trimming is formed between the opposite surfaces of the lower positioning plate and the upper positioning plate, and the clamping positioning area is provided with a lower positioning groove and an upper positioning piece that cooperate with each other.

[0008] Preferably, the positioning assembly includes a fastening bolt and a positioning pin. After the lower positioning plate and the upper positioning plate are aligned, they are fastened together by the fastening bolt. The bottom end of the positioning pin is fixedly connected to the lower positioning plate, and the top end of the positioning pin is slidably connected to the upper positioning plate.

[0009] Preferably, the working surface of the lower positioning groove is set to be a plane or an arc surface, and the working surface of the upper positioning member is set to be a plane.

[0010] Preferably, the working surface of the lower positioning groove is processed into a rough surface.

[0011] Preferably, the width of the working surface of the upper positioning member is not less than the width of the working surface of the lower positioning groove.

[0012] Preferably, when the lower positioning plate is provided with two clamping positioning areas, they include a first positioning area and a second positioning area arranged side by side, and an intermediate groove is provided between the first positioning area and the second positioning area.

[0013] Preferably, a scale line is provided on one side of the lower positioning groove to facilitate positioning and measurement.

[0014] Preferably, the upper positioning member and the upper positioning plate are configured as an integral structure or a split structure. When configured as a split structure, the steps of the upper positioning member and the upper positioning plate are aligned and fastened together by connecting screws passing through connecting holes.

[0015] Preferably, an upper air avoidance groove is opened in the center of the upper positioning piece and the upper positioning plate, and a lower air avoidance groove is opened in the center of the lower positioning groove, and the lower air avoidance groove corresponds to the upper air avoidance groove one by one; the upper air avoidance groove is a through groove, and the lower air avoidance groove is a through groove or a blind groove.

[0016] Preferably, the upper and lower air-avoiding grooves are designed to be in the shape of a waist or a plurality of side-by-side circular holes.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are:

[0018] The utility model discloses a bone fragment trimming and positioning device, comprising a lower positioning plate and an upper positioning plate, wherein the upper positioning plate and the lower positioning plate are detachably connected by fastening bolts and positioning pins, and at least one clamping positioning area is formed between the opposite surfaces of the lower positioning plate and the upper positioning plate, and the clamping positioning area is provided with a lower positioning groove and an upper positioning piece that cooperate with each other; when in use, the bone fragment to be processed and the template are placed on the lower positioning groove and clamped downward by the upper positioning piece, and the operator trims the bone fragment with a handheld electric drill or a grinding head. During the trimming operation, the bone fragment is stably positioned, the trimming efficiency is high, and the safety is good; at the same time, the bone fragment punching operation can be completed after clamping and positioning.

[0019] The setting of the scale line makes it easier to determine the trimming length and position, thereby improving the accuracy and convenience of bone slice trimming.

[0020] The utility model has a compact layout and is easy and quick to operate, and realizes stable positioning when trimming bone fragments. Compared with the handheld operation in the prior art, the safety of the operation is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a front view of the bone fragment trimming and positioning device of the utility model;

[0023] Figure 2 This is a side view of the bone fragment trimming and positioning device of the utility model;

[0024] Figure 3 This is a top view of the lower positioning plate of the utility model;

[0025] Figure 4 This is a bottom view of the upper positioning plate of the utility model (split structure);

[0026] Figure 5 This is a cross-sectional view of the upper positioning plate of the utility model (overall structure);

[0027] Figure 6 This is a top view of the lower positioning plate of the utility model (overall structure);

[0028] Figure 7 This is a schematic diagram of the utility model in use.

[0029] Explanation of reference numerals: 1, lower positioning plate; 2, upper positioning plate; 3, lower positioning groove; 4, upper positioning member; 5, fastening bolt; 6, positioning pin; 7, scale line; 8, middle groove; 9, reference template; 10, bone piece;

[0030] 201, connecting screw; 301, first positioning area; 302, second positioning area; 401, connecting hole; 402, upper air avoidance groove. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] like Figure 1-6 As shown, a bone fragment trimming and positioning device includes a lower positioning plate 1 and an upper positioning plate 2, wherein the upper positioning plate 2 is detachably connected to the lower positioning plate 1 through a positioning assembly, and at least one clamping positioning area for bone fragment trimming is formed between the opposite surfaces of the lower positioning plate 1 and the upper positioning plate 2, and the clamping positioning area is provided with a lower positioning groove 3 and an upper positioning member 4 that cooperate with each other.

[0033] Specifically, the positioning assembly includes a fastening bolt 5 and a positioning pin 6. After the lower positioning plate 1 and the upper positioning plate 2 are aligned, they are fastened together by the fastening bolt 5. The bottom end of the positioning pin 6 is fixedly connected to the lower positioning plate 1, and the top end of the positioning pin 6 is slidably connected to the upper positioning plate 2.

[0034] Specifically, there are two fastening bolts 5 and positioning pins 6 and they are symmetrically distributed; in one embodiment, a bolt through hole is opened on the upper positioning plate 2, and a threaded hole is opened on the lower positioning plate 1, and the bottom end of the fastening bolt 5 is screwed and connected in the threaded hole to realize the fastening operation after the two are aligned; in another embodiment, a threaded hole is opened on the upper positioning plate 2, and a circular hole is opened on the lower positioning plate 1, and the bottom end of the fastening bolt 5 is rotatably connected together with the circular hole, and the top of the fastening bolt 5 is screwed and connected in the threaded hole of the upper positioning plate 2. When the fastening bolt 5 rotates, the bottom end always abuts against the bottom of the circular hole, and the upper positioning plate 2 converts the lifting motion through the threaded connection to realize the adjustment of the distance between the upper positioning plate 2 and the lower positioning plate 1; during the movement, the positioning pin 6 plays the role of positioning guide to ensure the stability of the movement of the upper positioning plate 2.

[0035] like Figure 2 As shown, the working surface of the lower positioning groove 3 is set to a flat or curved surface, and the working surface of the upper positioning member 4 is set to a flat surface. Specifically, the working surface of the lower positioning groove 3 is treated to a rough surface to increase the friction during positioning, improve the stability of bone fragment placement, and reduce the occurrence of slippage problems.

[0036] Specifically, the width of the working surface of the upper positioning member 4 is not less than the width of the working surface of the lower positioning groove 3 .

[0037] like Figure 2 、 3As shown, when the lower positioning plate 1 is provided with two clamping positioning areas, they include a first positioning area 301 and a second positioning area 302 side by side, and an intermediate groove 8 is provided between the first positioning area 301 and the second positioning area 302. When the bone piece needs to be cut, it can be placed directly above the intermediate groove 8, and the two sides or one side are pressed by the upper positioning piece 4, and the cutting knife can be moved vertically forward to realize the cutting operation and complete the segmentation of the bone piece.

[0038] Specifically, a scale line 7 is provided on one side of the lower positioning groove 3 for facilitating positioning and measurement, thereby facilitating determination of the trimmed length and position of the bone fragment, thereby improving the accuracy and convenience of trimming the bone fragment.

[0039] The upper positioning member 4 and the upper positioning plate 2 are configured as an integral structure or a split structure, wherein, as Figure 5-6 As shown, it is the overall structure; Figure 1-3 As shown, when the structure is split, the upper positioning member 4 is aligned with the step of the upper positioning plate 2 and is fastened together by connecting screws 201 through the connecting holes 401. Specifically, the lower positioning plate 1, the upper positioning plate 2 and the upper positioning member 4 are made of stainless steel or titanium alloy.

[0040] Specifically, an upper clearance groove 402 is defined at the center of the upper positioning member 4 and the upper positioning plate 2, and a lower clearance groove is defined at the center of the lower positioning groove 3. The lower clearance groove corresponds one-to-one with the upper clearance groove 402. The upper clearance groove 402 is a through groove, while the lower clearance groove is a through groove or a blind groove. This clearance groove design facilitates the processing of through holes in bone fragments.

[0041] Specifically, the upper avoidance groove 402 and the lower avoidance groove are designed to be waist-shaped or in the shape of multiple side-by-side circular holes. When drilling, the drill bit passes through the avoidance groove or the circular hole.

[0042] The use process of this utility model is as follows:

[0043] Before use, assemble the device and place it on the workbench. The upper positioning plate 2 is positioned and connected to the upper part of the lower positioning plate 1 by fastening bolts 5 and positioning pins 6. The opposing surfaces of the two do not touch each other and maintain a certain gap.

[0044] Then, the bone piece to be processed is placed on the lower positioning groove 3, and a suitable placement position is selected according to the shape of the bone piece. If the bone piece is flat, it is placed in the first positioning area 301. If the bone piece is a column with a certain thickness, it is preferably placed in the second positioning area 302.

[0045] Afterwards, the upper positioning member 2 is driven downward by rotating the fastening bolt 5 to clamp the bone fragment;

[0046] Finally, the operator uses a handheld electric drill or grinding head to trim or drill the contours of the bone fragment.

[0047] When the device is used for trimming operations, the bone fragments are positioned stably, the trimming efficiency is high, and the safety is good.

[0048] like Figure 7 As shown, in another specific embodiment, a reference template 9 with a preset shape is provided during processing. The reference template 9 and the bone fragment 10 are stacked on top of each other and clamped in the first positioning area 301 or the second positioning area 302. The operator performs a directional trimming operation on the bone fragment 10 according to the preset shape on the reference template 9. This operation is guided and more convenient and quick.

[0049] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0050] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A bone fragment trimming and positioning device, characterized in that: The invention comprises a lower positioning plate (1) and an upper positioning plate (2), wherein the upper positioning plate (2) is detachably connected to the lower positioning plate (1) via a positioning assembly, and at least one clamping positioning area for trimming bone fragments is formed between the opposing surfaces of the lower positioning plate (1) and the upper positioning plate (2), and the clamping positioning area is provided with a lower positioning groove (3) and an upper positioning member (4) that cooperate with each other.

2. The bone fragment trimming and positioning device according to claim 1, characterized in that: The positioning assembly comprises a fastening bolt (5) and a positioning pin (6); the lower positioning plate (1) and the upper positioning plate (2) are aligned and fastened together by the fastening bolt (5); the bottom end of the positioning pin (6) is fixedly connected to the lower positioning plate (1), and the top end of the positioning pin (6) is slidably connected to the upper positioning plate (2).

3. The bone fragment trimming and positioning device according to claim 1, characterized in that: The working surface of the lower positioning groove (3) is set as a plane or an arc surface, and the working surface of the upper positioning member (4) is set as a plane.

4. The bone fragment trimming and positioning device according to claim 3, characterized in that: The working surface of the lower positioning groove (3) is processed into a rough pitted surface.

5. The bone fragment trimming and positioning device according to claim 3, characterized in that: The width of the working surface of the upper positioning member (4) is not less than the width of the working surface of the lower positioning groove (3).

6. The bone fragment trimming and positioning device according to claim 1, characterized in that: When the lower positioning plate (1) is provided with two clamping positioning areas, the clamping positioning areas include a first positioning area (301) and a second positioning area (302) arranged side by side, and an intermediate groove (8) is provided between the first positioning area (301) and the second positioning area (302).

7. The bone fragment trimming and positioning device according to claim 1, characterized in that: One side of the lower positioning groove (3) is provided with a scale line (7) for facilitating positioning and measurement.

8. The bone fragment trimming and positioning device according to claim 1, characterized in that: The upper positioning member (4) and the upper positioning plate (2) are configured as an integral structure or a split structure. When configured as a split structure, the steps of the upper positioning member (4) and the upper positioning plate (2) are aligned and fastened together by connecting screws (201) passing through the connecting holes (401).

9. The bone fragment trimming and positioning device according to claim 8, characterized in that: An upper avoidance groove (402) is provided at the center of the upper positioning member (4) and the upper positioning plate (2), and a lower avoidance groove is provided at the center of the lower positioning groove (3), and the lower avoidance groove corresponds to the upper avoidance groove (402) one by one; the upper avoidance groove (402) is a through groove, and the lower avoidance groove is a through groove or a blind groove.

10. The bone fragment trimming and positioning device according to claim 9, characterized in that: The upper air-avoiding groove (402) and the lower air-avoiding groove are designed to be waist-shaped or to be in the shape of a plurality of side-by-side circular holes.

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