3d printing interlayer reinforcement molding method and implant for cranioplasty

By employing a dual-nozzle differential temperature control 3D printing method, the problem of insufficient interlayer bonding in skull defect repair implants has been solved, achieving high-strength interlayer interface fusion and structural stability, making it suitable for skull repair in complex curved areas.

CN120792166BActive Publication Date: 2025-11-25KONTOUR (XI AN) MEDICAL TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202511303770.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-09-12
Publication Date
2025-11-25
Estimated Expiration
2045-09-12

AI Technical Summary

Technical Problem

Existing 3D-printed skull defect repair implants have insufficient interlayer bonding strength, resulting in inadequate interfacial bonding, which affects the structural integrity and postoperative stability of the implant.

Method used

Using a dual-nozzle structure and differentiated temperature control, the polymer material is heated to a fully molten and a semi-molten state respectively, and simultaneously extruded to form the main structure and interface area of ​​the printing layer. The semi-molten material is used to penetrate into the surface pores of the previous layer to enhance the interlayer bonding.

Benefits of technology

It improves interlayer adhesion, reduces interfacial peeling and delamination problems, enhances the structural stability and biocompatibility of the implant, and ensures a high degree of conformity between the printing path and the actual bone defect boundary.

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Abstract

The application provides a 3D printing interlayer reinforcing forming method for cranium defect repair, and belongs to the technical field of 3D printing and medical implant manufacturing. The steps are as follows: 1. Based on the medical imaging data of the cranium defect area of a patient, a personalized three-dimensional model that is adapted to the anatomical structure of the bone defect area is constructed, and path data for 3D printing is generated; 2. The selected medical-grade polymer material is heated in a differentiated temperature control manner by setting different temperature control areas through a 3D printing device; 3. The 3D printing device synchronously extrudes and deposits materials in different states along the preset path direction through a double-nozzle structure, and finally forms an entity that is matched with the structure of the bone defect area; 4. The surface of the printed part is cleaned and dried at low temperature, and sterilization and sterile packaging are performed according to the medical use requirements. The application can significantly improve the tightness of interlayer bonding without affecting the printing efficiency.
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