A processing method for a polyetheretherketone special-shaped curved surface structure repair body

Abstract

The present invention provides a processing method for a polyether ether ketone special-shaped curved surface structure repair body. The processing method includes: constructing a cutting model according to the maximum contour line of the repair body model, and respectively cutting a polyether ether ketone sheet and a substrate sheet according to the cutting model to obtain a special-shaped blank and a model substrate; embedding the special-shaped blank into the model substrate, fixing the special-shaped blank, and processing the special-shaped blank according to the contour of the repair body model to obtain the polyether ether ketone special-shaped curved surface structure repair body. The processing method provided by the present invention can minimize the removed part of the polyether ether ketone raw material during the numerical control processing, greatly reduce the loss of the polyether ether ketone raw material, effectively improve the processing efficiency, and reduce the comprehensive processing cost of the product. The material of the model substrate can be selected from common low-cost materials for making the female die.

Description

Technical Field

[0001] The present invention belongs to the technical field of clinical surgery and relates to a processing method for a polyetheretherketone (PEEK) special-shaped curved surface structure prosthesis. Background Art

[0002] Polyetheretherketone (PEEK) is a type of semi-crystalline polymer material that is non-toxic, lightweight, high-temperature resistant, corrosion-resistant, has excellent mechanical strength, an ideal elastic modulus, excellent biocompatibility, and excellent friction properties, and has radiopacity, so no artifacts will be generated during magnetic resonance scanning. As an excellent biomaterial suitable for human implantation, it has been increasingly widely used clinically in recent years. In particular, it can effectively solve problems such as poor light transmission performance of metals and large differences in elastic modulus from human bones, which are likely to cause stress shielding, and is an ideal material to replace traditional titanium-based metal implants.

[0003] In the fields of neurosurgery and maxillofacial surgery, PEEK can be used as an ideal human bone repair prosthesis to fill the bone defect or bone filling part of the patient to achieve a perfect fitting surgical repair effect. Compared with the covering repair of traditional titanium repair meshes, it has great advantages in the aesthetics of the postoperative wound and long-term stability.

[0004] PEEK for clinical implantation belongs to high-end biomaterials with strict standard requirements and great manufacturing difficulty. Therefore, only a few suppliers in the field of special materials around the world can master the core technology, and the raw material products provided are expensive and limited in specifications. Taking the sheet as an example, it has a large size and a generally thick thickness. At present, most processing methods for PEEK prostheses use a numerical control processing technology similar to that of titanium repair meshes and require high-precision numerical control machine tools (common three-axis or five-axis machining centers).

[0005] In addition, the titanium repair mesh has a standardized size and specification during processing and can be cut according to needs during clinical use. However, the PEEK prosthesis needs to be directly processed into a special-shaped outer shape and curved surface structure according to the defect part of the patient. Therefore, its processing process is more complex than that of the titanium repair mesh. In particular, the effective clamping of the special-shaped structure often requires specially designed work jigs, which is a difficulty in processing. In addition, directly processing the original specification sheet into special-shaped parts often causes huge waste of raw materials. Summary of the Invention

[0006] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a processing method for a PEEK special-shaped curved surface structure prosthesis, which can minimize the removed part of the PEEK raw material during the numerical control processing, greatly reduce the loss of the PEEK raw material, effectively improve the processing efficiency, and reduce the comprehensive processing cost of the product. The material of the model substrate can be selected from common low-cost materials for making the female mold.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a processing method for a polyetheretherketone special-shaped curved surface structure repair body, and the processing method includes:

[0009] Construct a cutting model according to the maximum contour line of the repair body model, and cut the polyetheretherketone sheet and the substrate sheet respectively according to the cutting model to obtain a special-shaped blank and a model substrate; embed the special-shaped blank into the model substrate, fix the special-shaped blank, and process the special-shaped blank according to the contour of the repair body model to obtain the polyetheretherketone special-shaped curved surface structure repair body.

[0010] The processing method provided by the present invention completely cuts the original polyetheretherketone sheet according to the maximum contour line of the external shape structure of the repair body, cuts the original polyetheretherketone sheet into blanks suitable for the processing of repair body products, has high cutting accuracy, and the remaining polyetheretherketone sheet can be used for the next repair body processing. By reasonably splicing the blanks of various special-shaped structure repair bodies, the comprehensive utilization rate of the original sheet can be maximized. In addition, the model substrate is processed according to the cutting model, and the model substrate is used as a fixed support fixture in the numerical control processing process, without additionally designing a complex special-shaped part clamping tooling. Since the model substrate matches the external contour of the special-shaped blank, the special-shaped blank can fit more perfectly on the surface of the model substrate, and the processing can be carried out to the maximum extent according to the external contour of the special-shaped curved surface structure of the repair body. In the numerical control processing process, the removed part of the polyetheretherketone raw material can be minimized to a great extent, the loss of the polyetheretherketone raw material is greatly reduced, the processing efficiency is effectively improved, and the comprehensive processing cost of the product is reduced. The material of the model substrate can be selected from common low-cost materials for making the concave mold.

[0011] As a preferred technical solution of the present invention, the construction process of the cutting model specifically includes:

[0012] According to the pre-designed repair body model, find the maximum contour line of the external shape structure of the repair body model through digital design software, and set the maximum contour line as the reference plane;

[0013] Project the reference plane and construct a planar special-shaped border of the external shape, equally magnify the planar special-shaped border and simplify some irregular curves, and finally form the cutting model of the repair body model.

[0014] As a preferred technical solution of the present invention, the polyetheretherketone sheet is cut and formed in a sheet cutting machine to obtain the special-shaped blank.

[0015] The substrate sheet is processed and formed on a numerical control machine to obtain the model substrate.

[0016] As a preferred technical solution of the present invention, the material of the lining substrate is plastic or metal.

[0017] As a preferred technical solution of the present invention, the model substrate includes a first substrate female die and a second substrate female die. The outer contour of the first substrate female die is the same as the outer contour of the cutting model, and the outer contour of the second substrate female die is mirror-symmetrical with the outer contour of the cutting model.

[0018] As a preferred technical solution of the present invention, the special-shaped blank is processed on a numerically controlled machine tool to obtain the polyether ether ketone special-shaped curved surface structure repair body.

[0019] As a preferred technical solution of the present invention, the processing process of the special-shaped blank on the numerically controlled machine tool includes:

[0020] Embedding the special-shaped blank into the first substrate female die, and processing the part of the special-shaped blank above the reference plane;

[0021] Using condensation glue to backfill the cut part, so that the outer contour of the special-shaped blank is restored to the outer contour before processing;

[0022] After the condensation glue is cured, mill a plane on the surface of the special-shaped blank, take out the special-shaped blank from the first substrate female die, embed it into the second substrate female die, and process the part of the special-shaped blank below the reference plane;

[0023] After the processing is completed, break the cured condensation glue and take out the special-shaped blank from the second substrate female die.

[0024] As a preferred technical solution of the present invention, after the processing of the special-shaped blank, a semi-finished repair body is obtained. The semi-finished repair body is cleaned, and the edge of the cleaned semi-finished repair body is trimmed to obtain the special-shaped curved surface structure repair body.

[0025] As a preferred technical solution of the present invention, the cleaning method is ultrasonic cleaning.

[0026] As a preferred technical solution of the present invention, the processing method includes:

[0027] (1) According to the pre-designed repair body model, use digital design software to find the maximum contour line of the outer shape structure of the repair body model, and set the maximum contour line as the reference plane;

[0028] Project the reference plane and construct a planar special-shaped border of the outer shape, equally magnify the planar special-shaped border and simplify some irregular curves, and finally form the cutting model of the repair body model.

[0029] (2) Import the cutting model into the sheet metal cutting machine, and the sheet metal cutting machine automatically cuts according to the cutting model to obtain the special-shaped blank;

[0030] (3) Place a model substrate with a certain thickness on the processing platform of the numerical control machine tool, import the cutting model into the numerical control machine tool, and process the model substrate to obtain the first substrate female die and the second substrate female die. The outer contour of the first substrate female die is the same as the outer contour of the cutting model, and the outer contour of the second substrate female die is in a mirror image relationship with the outer contour of the cutting model;

[0031] (4) Embed the special-shaped blank into the first substrate female die, and process the part of the special-shaped blank above the reference plane;

[0032] (5) Backfill the cut part with condensation glue so that the outer contour of the special-shaped blank returns to the outer contour before processing;

[0033] (6) After the condensation glue is cured, mill a plane on the surface of the special-shaped blank, take out the special-shaped blank from the first substrate female die, embed it into the second substrate female die, and process the part of the special-shaped blank below the reference plane;

[0034] (7) Break the cured condensation glue, take out the special-shaped blank from the second substrate female die, use ultrasonic cleaning to remove the residual colloid impurities on the surface of the special-shaped blank, and trim the edge of the special-shaped blank to obtain the polyether ether ketone special-shaped curved surface structure repair body.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] The processing method provided by the present invention completely cuts the original polyether ether ketone sheet according to the maximum contour line of the outer shape structure of the repair body, cuts the original polyether ether ketone sheet into a blank suitable for the processing of the repair body product, has high cutting accuracy, and the remaining polyether ether ketone sheet can be used for the next repair body processing. By reasonably splicing the blanks of various special-shaped structure repair bodies, the comprehensive utilization rate of the original sheet can be maximized. In addition, according to the cutting model, the model substrate is processed, and the model substrate is used as a fixed support fixture in the numerical control processing process, without the need to design a complex special-shaped part clamping tooling separately. Since the outer contour of the model substrate matches the outer contour of the special-shaped blank, the special-shaped blank can fit more perfectly on the surface of the model substrate, and the processing can be carried out to the maximum extent according to the outer contour of the special-shaped curved surface structure of the repair body. In the numerical control processing process, the removed part of the polyether ether ketone raw material can be minimized to a great extent, the loss of the polyether ether ketone raw material is greatly reduced, the processing efficiency is effectively improved, and the comprehensive processing cost of the product is reduced. The material of the model substrate can be selected from common low-cost materials for the production of the female die. Specific embodiments

[0037] The technical solution of the present invention will be further described below through specific embodiments.

[0038] In a specific embodiment, the present invention provides a processing method for a polyetheretherketone special-shaped curved surface structure repair body, and the processing method includes:

[0039] Construct a cutting model according to the maximum contour line of the repair body model, and cut the polyetheretherketone sheet and the substrate sheet respectively according to the cutting model to obtain a special-shaped blank and a model substrate; embed the special-shaped blank into the model substrate, fix the special-shaped blank, and process the special-shaped blank according to the contour of the repair body model to obtain the polyetheretherketone special-shaped curved surface structure repair body.

[0040] The processing method provided by the present invention completely cuts the original polyetheretherketone sheet according to the maximum contour line of the outer shape structure of the repair body, cuts the original polyetheretherketone sheet into blanks suitable for the processing of the repair body product, has high cutting accuracy, and the remaining polyetheretherketone sheet can be used for the next repair body processing. By reasonably splicing the blanks of various special-shaped structure repair bodies, the comprehensive utilization rate of the original sheet can be maximized. In addition, the model substrate is processed according to the cutting model, and the model substrate is used as a fixed support fixture in the numerical control processing process, and there is no need to design a complex special-shaped part clamping tooling additionally. Since the outer shape contour of the model substrate matches that of the special-shaped blank, the special-shaped blank can fit more perfectly on the surface of the model substrate, and the processing can be carried out according to the outer shape contour of the special-shaped curved surface structure of the repair body to the greatest extent. In the numerical control processing process, the removed part of the polyetheretherketone raw material can be minimized to the greatest extent, the loss of the polyetheretherketone raw material is greatly reduced, the processing efficiency is effectively improved, and the comprehensive processing cost of the product is reduced. The material of the model substrate can be selected from common low-cost materials for making the female die.

[0041] Further, the construction process of the cutting model specifically includes:

[0042] According to the pre-designed repair body model, find the maximum contour line of the outer shape structure of the repair body model through digital design software, and set the maximum contour line as the reference plane;

[0043] Project the reference plane and construct a planar special-shaped border of the outer shape, equally magnify the planar special-shaped border and simplify some irregular curves, and finally form the cutting model of the repair body model.

[0044] Further, the polyetheretherketone sheet is cut and formed in a sheet cutting machine to obtain the special-shaped blank.

[0045] The substrate sheet is processed and formed on a numerical control machine to obtain the model substrate.

[0046] Further, the material of the substrate plate is plastic or metal.

[0047] Further, the model substrate includes a first substrate female die and a second substrate female die. The outer contour of the first substrate female die is the same as the outer contour of the cutting model, and the outer contour of the second substrate female die is mirror-symmetrical to the outer contour of the cutting model.

[0048] Further, the special-shaped blank is processed on a numerically controlled machine tool to obtain the polyether ether ketone special-shaped curved surface structure repair body.

[0049] Further, the processing process of the special-shaped blank on the numerically controlled machine tool includes:

[0050] Embedding the special-shaped blank into the first substrate female die, and processing the part of the special-shaped blank above the reference plane;

[0051] Using condensation glue to backfill the cut part, so that the outer contour of the special-shaped blank is restored to the outer contour before processing;

[0052] After the condensation glue is cured, mill a plane on the surface of the special-shaped blank, take out the special-shaped blank from the first substrate female die, embed it into the second substrate female die, and process the part of the special-shaped blank below the reference plane;

[0053] After the processing is completed, break the cured condensation glue and take out the special-shaped blank from the second substrate female die.

[0054] Further, after the processing of the special-shaped blank, a semi-finished repair body is obtained. The semi-finished repair body is cleaned, and the edges of the cleaned semi-finished repair body are trimmed to obtain the special-shaped curved surface structure repair body.

[0055] Further, the cleaning method is ultrasonic cleaning.

[0056] Further, the processing method specifically includes the following steps:

[0057] (1) According to the pre-designed repair body model, use digital design software to find the maximum contour line of the outer structure of the repair body model, and set the maximum contour line as the reference plane;

[0058] Project the reference plane and construct a planar special-shaped border of the outer shape, perform equidistant magnification on the planar special-shaped border and simplify some irregular curves, and finally form the cutting model of the repair body model;

[0059] (2) Import the cutting model into a plate cutting machine, and the plate cutting machine automatically cuts according to the cutting model to obtain the special-shaped blank;

[0060] (3) Place a model substrate with a certain thickness on the processing platform of the CNC machine tool, import the cutting model into the CNC machine tool, and process the model substrate to obtain a first substrate female die and a second substrate female die. The outer contour of the first substrate female die is the same as the outer contour of the cutting model, and the outer contour of the second substrate female die is in a mirror image relationship with the outer contour of the cutting model;

[0061] (4) Embed the special-shaped blank into the first substrate female die and process the part of the special-shaped blank above the reference plane;

[0062] (5) Backfill the cut part with condensation glue to restore the outer contour of the special-shaped blank to the outer contour before processing;

[0063] (6) After the condensation glue is cured, mill a plane on the surface of the special-shaped blank, take out the special-shaped blank from the first substrate female die, embed it into the second substrate female die, and process the part of the special-shaped blank below the reference plane;

[0064] (7) Break the cured condensation glue, take out the special-shaped blank from the second substrate female die, use ultrasonic cleaning to remove the residual colloid impurities on the surface of the special-shaped blank, and trim the edge of the special-shaped blank to obtain the polyether ether ketone special-shaped curved surface structure repair body.

[0065] The applicant declares that the above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention fall within the protection scope and the disclosure scope of the present invention.

Claims

1. A processing method for a polyetheretherketone special-shaped curved surface structure prosthesis, characterized in that, the processing method includes: Constructing a cutting model according to the maximum contour line of the prosthesis model, and cutting the polyetheretherketone sheet and the substrate sheet respectively according to the cutting model to obtain a special-shaped blank and a model substrate; embedding the special-shaped blank into the model substrate, fixing the special-shaped blank, and processing the special-shaped blank according to the contour of the prosthesis model to obtain the polyetheretherketone special-shaped curved surface structure prosthesis; The construction process of the cutting model specifically includes: According to the pre-designed prosthesis model, use digital design software to find the maximum contour line of the external structure of the prosthesis model, and set the maximum contour line as the reference plane; Project the reference plane and construct a planar special-shaped border of the external shape, equally magnify the planar special-shaped border and simplify some irregular curves, and finally form the cutting model of the prosthesis model.

2. The processing method for a polyetheretherketone special-shaped curved surface structure prosthesis according to claim 1, characterized in that, The polyetheretherketone sheet is cut and formed in a sheet cutting machine to obtain the special-shaped blank; The substrate sheet is processed and formed on a numerical control machine to obtain the model substrate.

3. The processing method for a polyetheretherketone special-shaped curved surface structure prosthesis according to claim 1, characterized in that, The material of the substrate sheet is plastic or metal.

4. The processing method for a polyetheretherketone special-shaped curved surface structure prosthesis according to claim 1, characterized in that, The model substrate includes a first substrate female die and a second substrate female die. The external contour of the first substrate female die is the same as the external contour of the cutting model, and the external contour of the second substrate female die is mirror-symmetrical to the external contour of the cutting model.

5. The processing method for a polyetheretherketone special-shaped curved surface structure prosthesis according to claim 4, characterized in that, The special-shaped blank is processed on a numerical control machine to obtain the polyetheretherketone special-shaped curved surface structure prosthesis.

6. The processing method for a polyetheretherketone special-shaped curved surface structure prosthesis according to claim 5, characterized in that, The processing process of the special-shaped blank on the numerical control machine includes: Embedding the special-shaped blank into the first substrate female die, and processing the part of the special-shaped blank above the reference plane; Using condensation glue to backfill the cut part, so that the external contour of the special-shaped blank returns to the external contour before processing; After the condensation glue is cured, mill a plane on the surface of the special-shaped blank, take out the special-shaped blank from the first substrate female die, embed it into the second substrate female die, and process the part of the special-shaped blank below the reference plane; After the processing is completed, break the cured condensation glue and take out the special-shaped blank from the second substrate female die.

7. The processing method for a polyetheretherketone special-shaped curved surface structure prosthesis according to claim 1, characterized in that, After the special-shaped blank is processed, a prosthesis semi-finished product is obtained, the prosthesis semi-finished product is cleaned, and the edge of the cleaned prosthesis semi-finished product is trimmed to obtain the special-shaped curved surface structure prosthesis.

8. The processing method for a polyetheretherketone special-shaped curved surface structure prosthesis according to claim 7, characterized in that, The cleaning method is ultrasonic cleaning.

9. The processing method of the polyetheretherketone special-shaped curved surface structure repair body according to any one of claims 1-8, characterized in that the processing method includes: (1) According to the pre-designed repair body model, use digital design software to find the maximum contour line of the outer shape structure of the repair body model, and set the maximum contour line as the reference plane; Project the reference plane and construct a planar special-shaped border of the outer shape, equally enlarge the planar special-shaped border and simplify some irregular curves, and finally form a cutting model of the repair body model; (2) Import the cutting model into a sheet metal cutting machine, and the sheet metal cutting machine automatically cuts according to the cutting model to obtain the special-shaped blank; (3) Place a model substrate with a certain thickness on the processing platform of the numerical control machine tool, import the cutting model into the numerical control machine tool, and process the model substrate to obtain a first substrate female mold and a second substrate female mold. The outer contour of the first substrate female mold is the same as the outer contour of the cutting model, and the outer contour of the second substrate female mold is in a mirror image relationship with the outer contour of the cutting model; (4) Embed the special-shaped blank into the first substrate female mold, and process the part of the special-shaped blank above the reference plane; (5) Use condensation glue to backfill the cut part, so that the outer contour of the special-shaped blank is restored to the outer contour before processing; (6) After the condensation glue is cured, mill a plane on the surface of the special-shaped blank, take out the special-shaped blank from the first substrate female mold, embed it into the second substrate female mold, and process the part of the special-shaped blank below the reference plane; (7) Break the cured condensation glue, take out the special-shaped blank from the second substrate female mold, use ultrasonic cleaning to remove the colloidal impurities remaining on the surface of the special-shaped blank, and trim the edge of the special-shaped blank to obtain the polyetheretherketone special-shaped curved surface structure repair body.