AccScience Publishing / IJB / Volume 8 / Issue 4 / DOI: 10.18063/ijb.v8i4.607

3D Printing and Computer-Aided Design for Precision Osteotomy-Aided Modules in Bone Biomechanical Study

Daofeng Wang1,2† Lin Han3† Gaoxiang Xu1,2† Wupeng Zhang1,2,4 Hua Li1,2 Cheng Xu1,2 Huanyu Li5 Jitian Li6* Hao Zhang1,2* Jiantao Li1,2*
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1 Department of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital, Beijing, China
2 National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China
3 Department of Orthopaedics, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, China
4 Department of Orthopaedics, School of Medicine, Nankai University, Tianjin, China
5 Department of Pharmacology, School of Pharmacy Medical University, Shenyang, Liaoning Province, China
6 Henan Luoyang Orthopedic Hospital (Henan Provincial Orthopedic Hospital), Henan Institute of Orthopedic and Traumatology, Luoyang, China
Submitted: 3 May 2022 | Accepted: 4 June 2022 | Published: 23 August 2022
(This article belongs to the Special Issue 3D Printing of Advanced Biomedical Devices)
© 2022 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( )

Precise and shape-matching osteotomy models are determinants of the experimental homogeneity in the assessment of orthopedic biomechanical properties. At present, however, publications on detailed description of osteotomy in bone biomechanical study are scanty. The purposes of this study were to design a new method of osteotomy-aided module production for bone biomechanical study with the help of three-dimensional (3D) printing and computer-aided design (CAD) and to test the accuracy of osteotomy. Fourteen fourth-generation composite femurs were analyzed. The composite bone was scanned using computed tomography (CT) scanner and loaded in Mimics for reconstruction and, then, imported into 3-Matic software to design intertrochanteric region, distal femur, and rotation control lever models. 3D printer was used to print each component. After assembling Sawbones and osteotomy modules, a horizontal band-saw was used to create fracture models. The volume and mass of intermediate fragments were calculated and analyzed. Satisfactory osteotomies of all composite Sawbones were achieved. The mean volume and mass of intermediate fragments were 21.0 ± 1.5 mm3  and 19.0 ± 1.2 g, respectively. Range of deviation from average of volumes was −1.9 – 2.8 mm3 and most of these deviations fall within the range of −1.4 – 2.1 mm3 . Range of deviation from average of mass was −2.0 – 1.6 g and most of these deviations fall within the range of −1.4 – 1.6 g. One-dimensional histogram of deviation from average shows the precise and stable osteotomy performed based on the modules accordingly. A new method of osteotomy-aided module production for bone biomechanical study with the help of 3D printing and CAD was designed and the accuracy of osteotomy was verified. This method is expected to achieve homogeneity and standardization of osteotomy in bone biomechanical study

3D printing
Computer-aided design
Bone biomechanics

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International Journal of Bioprinting, Electronic ISSN: 2424-8002 Print ISSN: 2424-7723, Published by AccScience Publishing