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Updated: Jun 14, 2026

3D Planning and Printing of Patient Specific Implants for Reconstruction of Bony Defects

3D Planning and Printing of Patient Specific Implants for Reconstruction of Bony Defects

Published on: August 4, 2020

Corrective osteotomy using customized hydroxyapatite implants prepared by preoperative computer simulation.

Kunihiro Oka¹, Tsuyoshi Murase, Hisao Moritomo

¹Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan. oka-kunihiro@umin.ac.jp

The International Journal of Medical Robotics + Computer Assisted Surgery : MRCAS

|March 24, 2010

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Computer-aided design and hydroxyapatite blocks enable precise bone grafting for corrective osteotomies. This method significantly improves deformity correction and promotes bone fusion in forearm reconstructions.

Area of Science:

Orthopedic Surgery
Biomaterials Science
Computer-Aided Design

Background:

Opening wedge corrective osteotomy often necessitates bone grafting, posing challenges in graft shaping.
Traditional bone graft preparation can be complex and imprecise.

Purpose of the Study:

To present an innovative computer-aided system for designing and fabricating customized bone grafts.
To evaluate the efficacy of computer-designed hydroxyapatite grafts and patient-specific osteotomy templates in correcting forearm deformities.

Main Methods:

Developed a computer program to calculate optimal bone graft size and shape.
Utilized 3D bone models for bilateral comparison to design the graft.
Fabricated customized hydroxyapatite grafts and osteotomy templates based on preoperative simulations.

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Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy

Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy

Published on: February 17, 2023

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Last Updated: Jun 14, 2026

3D Planning and Printing of Patient Specific Implants for Reconstruction of Bony Defects

3D Planning and Printing of Patient Specific Implants for Reconstruction of Bony Defects

Published on: August 4, 2020

Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy

Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy

Published on: February 17, 2023

Applied these customized implants in five patients undergoing corrective osteotomy for forearm deformity.

Main Results:

Achieved accurate corrective osteotomy in all five patients.
Significantly reduced average angular deformities from 16.8 to 1.2 degrees (anteroposterior) and 16.6 to 0.6 degrees (lateral).
Observed complete bone fusion in all patients within five months post-surgery.

Conclusions:

Computer-designed, customized hydroxyapatite implants facilitate precise deformity correction.
This approach leads to favorable functional outcomes and efficient bone healing.
The integration of CAD and biomaterials offers a promising solution for complex osteotomies.