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A rapid prototyping-based methodology for patient-specific contouring of osteotomy plates

Gomari, B ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1108/RPJ-09-2018-0257
  3. Publisher: Emerald Group Publishing Ltd , 2019
  4. Abstract:
  5. Purpose: An important challenge of the osteotomy procedures, particularly in the case of large and complex corrections, is the fixation of the osteotomy site. The purpose of this study is to propose a practical and cost-effect methodology for the plate adapting problem of osteotomy surgery. Design/methodology/approach: A novel patient-specific plate contouring methodology, based on rapid prototyping (RP) and multi-point forming (MPF) techniques, was developed and evaluated. In this methodology, a female mold is fabricated by RP, based on the geometry of the osteotomy site and estimation of the plate spring back. The mold is then used to configure a MPF die, which is then used for press forming of the factory-made locking plate. The applicability of the methodology was assessed in two case studies. Findings: The results of implementing the methodology on a femoral and a tibial locking plate indicated very good conformity with the underlying bone, in both the frontal and sagittal planes. The surgical application of the pre-operatively contoured tibial plate facilitated the plate locating and screw inserting procedures, and provided a secure fixation for bone fragments. Practical implications: The results are promising and provide a proof of concept for the feasibility and applicability of the proposed methodology in clinical practice, as a complementary to the existing surgical preplanning and patient-specific instrument preparations. Originality/value: The advantageous features of RP and the MPF were used to provide a solution for the plate adapting problem of osteotomy surgery. © 2019, Emerald Publishing Limited
  6. Keywords:
  7. Adapting ; Conformity ; Locking Plates ; Material-deforming processes ; Multi point forming ; Patient-specific ; Rapid prototyping ; Single die ; Surgery ; Bone ; Molds ; Process planning ; Multi-point forming ; Patient specific ; Single dies ; Locks (fasteners)
  8. Source: Rapid Prototyping Journal ; Volume 25, Issue 5 , 2019 , Pages 888-894 ; 13552546 (ISSN)
  9. URL: https://www.emerald.com/insight/content/doi/10.1108/RPJ-09-2018-0257/full/html