Novel calcaneus posterior articular surface fixing steel plate

Abstract

The utility model relates to a novel calcaneus posterior articular surface fixing steel plate which comprises a plate face, a plurality of screw holes are formed in the plate face, a screw hole A, a screw hole B and a screw hole C are sequentially arranged, a screw hole F, a screw hole E and a screw hole D are sequentially arranged, the screw hole F, the screw hole E and the screw hole D are located below the screw hole A, the screw hole B and the screw hole C, and the screw hole A, the screw hole B and the screw hole C are located below the plate face. Screws penetrate through the screw holes A, the screw holes B and the screw holes C to be fixed to the sustentaculum tali, and combined raft supporting is conducted on the posterior articular surface and the sustentaculum tali. When screws of part of patients are cut out from the calcaneus sulcus, the spare screw hole F, the spare screw hole E and the spare screw hole D are used for replacing the screw hole A, the screw hole B and the screw hole C respectively, and it is guaranteed that the rear articular surface can be supported through three screws. According to the application, the comminuted calcaneus posterior articular surface can be powerfully supported, the stability of fracture fixation is powerfully guaranteed, the possibility of long-term posterior articular surface collapse is reduced, and the curative effect of comminuted calcaneus fracture is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical technology, specifically a novel calcaneal posterior articular surface fixation plate. Background Technology

[0002] Steel plates are mainly used in the treatment of fractures. When a fracture needs to be fixed, the doctor will use a steel plate to stabilize the fracture site after the fracture is reduced, so as to promote fracture healing.

[0003] Calcaneal fractures are a common type of foot fracture, especially fractures of the posterior articular surface of the calcaneus. Due to their complex anatomical structure and functional requirements, treatment is quite challenging. Traditional plates only have two screw holes ( Figure 1 (21, 22) Support the posterior articular surface of the calcaneus. For comminuted posterior articular surfaces of the calcaneus, not only are there fewer screws, but the locking holes on the plate do not point towards the suspensory process, ultimately resulting in the fixation not reaching the strength required for calcaneal fracture.

[0004] Therefore, a novel calcaneal posterior articular surface fixation plate is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a novel calcaneal posterior articular surface fixation plate. The plate has several screw holes arranged sequentially, with screw holes A, B, and C, and screw holes F, E, and D also arranged sequentially. Screw holes F, E, and D are located below screw holes A, B, and C. Screws pass through these three sequentially arranged screw holes. Screw holes A, B, and C, or screw holes F, E, and D, support the collapsed calcaneal posterior articular surface and insert all screws into the suspensory process.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A novel calcaneal posterior articular surface fixation plate includes a plate surface with a plurality of screw holes. Screw holes A, B, and C are arranged sequentially, as are screw holes F, E, and D. Screw holes F, E, and D are located below screw holes A, B, and C. Screws pass through the three sequentially arranged screw holes. Screw holes A, B, and C, or alternatively screw holes F, E, and D, support the collapsed calcaneal posterior articular surface, while simultaneously placing all screws into the suspensory fossa. The design of this plate allows the calcaneal posterior articular surface to be supported by three screws, and with all screws placed into the suspensory fossa, the fixation effect is further enhanced.

[0008] Preferably, the screw holes A, B, C are arranged in parallel with the screw holes F, E, D. The centers of the screw holes A, B, C are on a straight line, and the centers of the screw holes F, E, D are also on a straight line. The straight line connecting the centers of the screw holes A, B, C is parallel to the straight line connecting the centers of the screw holes F, E, D.

[0009] Preferably, the arrangement of the screw holes A, B, C and the screw holes F, E, D is rectangular. Threads are also provided on the screw holes, and the screws pass through the screw holes so that the threads on the screw holes further fix the screws.

[0010] Preferably, irregularly connected screw holes G, H, I, J, K are provided on the left side of the screw holes A, B, C, F, E, D. The screw hole G is connected to the lower left side of the screw hole F, the screw hole H is connected to the left side of the screw hole G, the screw hole I is connected to the lower side of the screw hole H, the screw hole J is connected to the lower right side of the screw hole I, the screw hole K is connected to the right side of the screw hole J, and the screw hole K is connected to the upper right side of the screw hole D.

[0011] Preferably, the arrangement of the screw holes G, H, I, J, K is in a "匚" shape.

[0012] Preferably, irregularly connected screw holes L, M, N, O are provided on the right side of the screw holes A, B, C, F, E, D. The screw hole L is connected to the right side of the screw hole C, the screw hole M is connected to the right side of the screw hole L, the screw hole N is connected to the lower side of the screw hole M, the screw hole O is connected to the left side of the screw hole N, the screw hole O is connected to the left side of the screw hole K, and the screw hole O is connected to the upper side of the screw hole L.

[0013] Preferably, the arrangement of the screw holes L, M, N, O is quadrilateral.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. The design of this new type of posterior subtalar joint fixation plate enables the posterior subtalar joint to be supported by three screws, similar to the "raft" screw technique for tibial plateau fractures, which improves the strength compared to the two screws of traditional plates, strongly supports the comminuted posterior subtalar joint, provides a strong guarantee for the stability of fracture fixation, allows patients to move and exercise early, reduces the possibility of late posterior joint surface collapse, and improves the curative effect of comminuted calcaneal fractures.

[0016] 2. This new type of calcaneal posterior articular surface fixation plate has high strength and rigidity, can withstand large loads, and helps fracture healing and recovery; at the same time, the six locking screw holes A, B, C, D, E and F have built-in angles, which can allow all screws to be inserted into the suspensory process. Attached Figure Description

[0017] Figure 1 A schematic diagram of a traditional calcaneal posterior articular surface fixation plate;

[0018] Figure 2 A schematic diagram of the structure of a novel calcaneal posterior articular surface fixation plate.

[0019] Figure 3 The reference diagram shows the angular direction of screw holes A, B, C, D, E, and F of the new type of calcaneal posterior articular surface fixation plate.

[0020] Figure 4-1 A schematic diagram showing the measurement of the screw hole angles of the new type of calcaneal posterior articular surface fixation plate;

[0021] Figure 4-2 A schematic diagram showing the measurement of the screw hole angles of the new type of calcaneal posterior articular surface fixation plate;

[0022] Figure 5-1 A schematic diagram showing the screw being cut out of the calcaneal groove after the traditional steel plate screw hole has been inserted.

[0023] Figure 5-2 A schematic diagram showing the screw being cut out of the calcaneal groove after the traditional steel plate screw hole has been inserted.

[0024] Figure 5-3 A schematic diagram showing the screw being cut out of the calcaneal groove after the traditional steel plate screw hole has been inserted.

[0025] Figure 6-1 A schematic diagram showing that after the screw holes D, E and F of the new calcaneal posterior articular surface fixation plate are inserted, the screws are not cut out from the calcaneal groove.

[0026] Figure 6-2 A schematic diagram showing that after the screw holes D, E and F of the new calcaneal posterior articular surface fixation plate are inserted, the screws are not cut out from the calcaneal groove.

[0027] Figure 6-3 A schematic diagram showing that after the screw holes D, E and F of the new calcaneal posterior articular surface fixation plate are inserted, the screws are not cut out from the calcaneal groove.

[0028] Figure 7-1A schematic diagram showing that after the screw holes A, B and C of the new calcaneal posterior articular surface fixation plate are inserted, the screws are not cut out from the calcaneal groove.

[0029] Figure 7-2 A schematic diagram showing that after the screw holes A, B and C of the new calcaneal posterior articular surface fixation plate are inserted, the screws are not cut out from the calcaneal groove.

[0030] Figure 7-3 A schematic diagram showing that after the screw holes A, B and C of the new calcaneal posterior articular surface fixation plate are inserted, the screws are not cut out from the calcaneal groove.

[0031] Figure 8 A schematic diagram of the new type of calcaneal posterior articular surface fixation plate on the calcaneal posterior articular surface.

[0032] In the diagram: 1. Screw hole A; 2. Screw hole B; 3. Screw hole C; 4. Screw hole D; 5. Screw hole E; 6. Screw hole F; 7. Board surface; 8. Screw hole G; 9. Screw hole H; 10. Screw hole I; 11. Screw hole J; 12. Screw hole K; 13. Screw hole L; 14. Screw hole M; 15. Screw hole N; 16. Screw hole O. Detailed Implementation

[0033] The technical solutions of the present utility model will now be described with reference to the accompanying drawings of the embodiments. The embodiments described below are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0034] Please see Figures 1 to 8 This utility model provides a novel calcaneal posterior articular surface fixation plate, the technical solution of which is as follows:

[0035] like Figure 2 As shown, a novel posterior calcaneal articular surface fixation plate includes a plate surface 7 with several screw holes. Screw holes A1, B2, and C3 are arranged sequentially, as are screw holes D4, E5, and F6. Screw holes F6, E5, and D4 are located below screw holes A1, B2, and C3, and are arranged parallel to them. Screws pass through the three sequentially arranged screw holes. Screw holes A1, B2, and C3, or alternatively screw holes F6, E5, and D4, provide strong support for the collapsed posterior calcaneal articular surface, enabling strong fixation of the fracture, significantly reducing the possibility of articular surface collapse, and meeting the patient's needs for early exercise and early weight-bearing.

[0036] The centers of the screw holes A1, B2, and C3 are on a straight line, and the centers of the screw holes D4, E5, and F6 are also on a straight line. The straight line connecting the centers of the screw holes A1, B2, and C3 is parallel to the straight line connecting the centers of the screw holes D4, E5, and F6. In the treatment of calcaneal fractures, the most crucial thing is the support of the articular surface. As Figure 1 shown, the traditional steel plate only has two screw holes ( Figure 1 21 and 22 in Figure 2 ) for the support of the articular surface, while the new calcaneal posterior articular surface fixation steel plate of the present application has three screw holes (

[0037] 1, 2, 3 or 4, 5, 6 in Figure 2 ) to support the posterior articular surface of the calcaneus, especially playing the role of a "drain valve" screw similar to the tibial plateau for the comminuted posterior articular surface of the calcaneus, making the fixation of the collapsed calcaneus more firm, enabling intuitive reduction and effective fixation, and at the same time avoiding the collapse of the articular surface and meeting the needs of early activities of patients.

[0038] Whether the sustentaculum tali can be inserted in calcaneal fractures is crucial for the stability of fracture fixation. For some patients, due to anatomical structure differences, when using traditional steel plates and trying to insert the best sustentaculum tali, the screws often penetrate through the articular surface halfway, making it difficult to achieve an ideal treatment effect. As Figure 4-1 and4-2 As shown, this novel calcaneal posterior articular surface fixation plate, before inserting screws into the suspensory process, firstly acquires calcaneal image data through CT scan. This data can be used to create a three-dimensional model of the calcaneus, and then measure the angle of the screw holes. Next, the CT image data is imported into software such as Mimics and E-3D, and a geometric model including the calcaneus is obtained through threshold selection, image segmentation, region growing, and smoothing / denoising. Finally, screw insertion is simulated on the three-dimensional model to determine the screw insertion point, maximum fixation diameter, length, and accurate angle. If preoperative planning indicates that the screw will protrude, the screw holes in the second row of the plate can be utilized. Figure 2 (4, 5, 6) Insert the screw into the bearing hole.

[0039] Traditional steel plates, after inserting screws into the two screw holes, can sometimes result in screws cutting out of the calcaneal groove due to anatomical structure. The novel posterior calcaneal articular surface fixation plate of this application adds three screw holes: D4, E5, and F6. The increased distance between these three holes and the articular surface prevents screws from cutting out of the calcaneal groove, providing an additional row of screw holes compared to traditional plates, thus acting as a safety net. During use, screws are preferentially fixed to the suspensory process via screw holes A1, B2, and C3, providing combined raft support for the posterior articular surface and suspensory process. In cases where screws cut out of the calcaneal groove in some patients, spare screw holes F6, E5, and D4 are used instead of A1, B2, and C3, respectively, ensuring that three screws are always available to support the posterior articular surface. Figures 5-1 to 5-3 The diagram shows that, following the traditional two-screw-hole method, the screw is inserted into the suspensory process, and the screw cuts through the bone from the calcaneal groove. Figure 5-3 (Screw exposed) Figures 6-1 to 6-3 The image shows screw placement using the second row of screw holes D4, E5, and F6 of the novel steel plate of this application, with the screws not protruding from the bone. Figure 6-3 The screw is completely inside the bone.

[0040] In the specific surgical procedure, firstly, imaging equipment such as CT scans is used to locate the fracture site, determining the fixation position and angle of the plate and screws. Then, a sleeve is installed on the predetermined first row of screw holes A1, B2, and C3, or the second row of screw holes D4, E5, and F6, ensuring a tight fit between the sleeve and the plate. Next, a drill bit is used, slowly and steadily drilling into the bone along the direction of the sleeve. The diameter of the drill bit matches the diameter of the screw used, ensuring the screw can pass smoothly through and be fixed to the bone. After drilling, a depth gauge is used to measure the depth of the hole. The length of the depth gauge matches the length of the selected screw to ensure the screw can completely penetrate the bone and reach the predetermined fixation position. The measured depth data is recorded for reference when screwing in the screw. The screw is slowly and steadily screwed into the drilled hole along the direction of the sleeve. Existing screws typically pass perpendicularly through the screw holes in the steel plate. However, in this application, the six screw holes (A1, B2, C3, D4, E5, and F6) of the steel plate have built-in angles, allowing the operator to easily insert the spacer screw. The angles of the screw holes A1, B2, C3, D4, E5, and F6 are as follows: Figure 3 As shown, please refer to Table 1 below for detailed angle data.

[0041]

[0042] During screwing, ensure a tight fit between the screw and the bone to prevent loosening or displacement. After the screw is fully screwed in, use imaging equipment to check the fixation effect, confirming a secure and stable connection without loosening or displacement. The final position of the new calcaneal posterior articular surface fixation plate on the calcaneus posterior articular surface is as follows: Figure 8 As shown.

[0043] Working principle:

[0044] Several screw holes are provided on the plate surface 7. Screw holes A1, B2 and C3 are arranged in sequence, as are screw holes D4, E5 and F6. Screw holes F6, E5 and D4 are located below screw holes A1, B2 and C3. Screws pass through the three screw holes arranged in sequence. Screw holes A1, B2 and C3 or screw holes F6, E5 and D4 support the collapsed posterior articular surface of the calcaneus, while all screws are inserted into the suspensory process.

[0045] Screw holes A1, B2, and C3 are arranged parallel to screw holes F6, E5, and D4. The centers of screw holes A1, B2, and C3 are on a straight line, as are the centers of screw holes F6, E5, and D4. The line connecting the centers of screw holes A1, B2, and C3 is parallel to the line connecting the centers of screw holes F6, E5, and D4. During use, screws are preferentially fixed to the suspensory process through screw holes A1, B2, and C3 to provide combined raft support for the posterior articular surface and suspensory process. When screws are cut out from the calcaneal groove in some patients, spare screw holes F6, E5, and D4 are used instead of screw holes A1, B2, and C3, respectively, ensuring that three screws can support the posterior articular surface. The plate in this application provides support for the posterior articular surface of the calcaneus with three screws, similar to the "raft" screw technique for tibial plateau fractures. This increases strength compared to the two screws in traditional plates, providing strong support for the comminuted posterior articular surface of the calcaneus and enhancing the stability of fracture fixation. This allows patients to begin early mobilization and exercise, reducing the likelihood of long-term posterior articular surface collapse and improving the treatment efficacy for comminuted calcaneal fractures. Furthermore, measurements of the specimen provide the angles at which the screws are placed through the six screw holes (A1, B2, C3, D4, E5, and F6) towards the spur.

[0046] Embodiments of the present invention have been shown and described. Those skilled in the art will be able to make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of calcaneal posterior articular surface fixation plate, characterized by, Including the board face (7), the board face (7) is provided with several screw holes, the screw hole A (1), the screw hole B (2) and the screw hole C (3) are sequentially arranged, the screw hole F (6), the screw hole E (5) and the screw hole D (4) are also sequentially arranged, the screw hole F (6), the screw hole E (5) and the screw hole D (4) are located below the screw hole A (1), the screw hole B (2) and the screw hole C (3), the screw passes through the three screw holes arranged sequentially, the screw hole A (1), the screw hole B (2), the screw hole C (3) or instead of the screw hole F (6), the screw hole E (5), the screw hole D (4) support the collapsed posterior articular surface of calcaneus, while all the screws are placed in the load-bearing processus.

2. The new type of calcaneal posterior articular facet fixation plate according to claim 1, characterized in that: The screw hole A (1), the screw hole B (2), the screw hole C (3) and the screw hole F (6), the screw hole E (5), the screw hole D (4) are arranged in parallel, the centers of the screw hole A (1), the screw hole B (2), the screw hole C (3) are on a straight line, the centers of the screw hole F (6), the screw hole E (5), the screw hole D (4) are also on a straight line, the straight line connecting the centers of the screw hole A (1), the screw hole B (2), the screw hole C (3) is parallel to the straight line connecting the centers of the screw hole F (6), the screw hole E (5), the screw hole D (4).

3. The new type of calcaneal posterior articular facet fixation plate according to claim 1, characterized in that: The arrangement of the screw hole A (1), the screw hole B (2), the screw hole C (3) and the screw hole F (6), the screw hole E (5), the screw hole D (4) is rectangular.

4. The new type of calcaneal posterior articular facet fixation plate according to claim 1, characterized in that: The left side of the screw hole A (1), the screw hole B (2), the screw hole C (3), the screw hole F (6), the screw hole E (5), the screw hole D (4) is provided with irregularly connected screw holes G (8), screw holes H (9), screw holes I (10), screw holes J (11), screw holes K (12), the lower left side of the screw hole F (6) is connected with the screw hole G (8), the left side of the screw hole G (8) is connected with the screw hole H (9), the lower side of the screw hole H (9) is connected with the screw hole I (10), the right lower side of the screw hole I (10) is connected with the screw hole J (11), the right side of the screw hole J (11) is connected with the screw hole K (12), the right upper side of the screw hole K (12) is connected with the screw hole D (4).

5. The new type of calcaneal posterior articular facet fixation plate according to claim 4, characterized in that: The arrangement of the screw hole G (8), the screw hole H (9), the screw hole I (10), the screw hole J (11), the screw hole K (12) is "D" shaped.

6. The new type of calcaneal posterior articular facet fixation plate according to claim 4, characterized in that: The right side of the screw A, the screw hole B (2), the screw hole C (3), the screw hole F (6), the screw hole E (5), the screw hole D (4) is provided with irregularly connected screw hole L (13), screw hole M (14), screw hole N (15), screw hole O (16), the right side of the screw hole C (3) is connected with the screw hole L (13), the right side of the screw hole L (13) is connected with the screw hole M (14), the lower side of the screw hole M (14) is connected with the screw hole N (15), the left side of the screw hole N (15) is connected with the screw hole O (16), the left side of the screw hole O (16) is connected with the screw hole K (12), and the upper side of the screw hole O (16) is connected with the screw hole L (13).

7. The new type of calcaneal posterior articular facet fixation plate according to claim 6, characterized in that: The arrangement of the screw hole L (13), the screw hole M (14), the screw hole N (15) and the screw hole O (16) is quadrilateral.

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