Evaluating the biomechanical performance of Ti6Al4V volar plates in patients with distal radius fractures

Hua Li; Daofeng Wang; Wupeng Zhang; Cheng Xu; Dou Xiong; Jiantao Li; Licheng Zhang; Peifu Tang

doi:10.3389/fbioe.2023.1141790

Evaluating the biomechanical performance of Ti6Al4V volar plates in patients with distal radius fractures

Front Bioeng Biotechnol. 2023 Feb 27:11:1141790. doi: 10.3389/fbioe.2023.1141790. eCollection 2023.

Authors

Hua Li^{1

2}, Daofeng Wang^{1

2}, Wupeng Zhang^{1

2

3}, Cheng Xu^{1

2}, Dou Xiong², Jiantao Li^{1

2}, Licheng Zhang^{1

2}, Peifu Tang^{1

2}

Affiliations

¹ Senior 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 School of Medicine, Nankai University, Tianjin, China.

Abstract

Purpose: This study aimed to investigate the biomechanical performance of three Ti6Al4V volar plates with the latest designs using a finite element model. Methods: An AO type 23-A3 distal radius fracture and the models of T plate (2.4 mm LCP Volar Distal Radius Plate), V plate (2.4 mm LCP Two-Column Volar Distal Radius Plate) and π Plate (2.4 mm Volar Rim Distal Radius Plate) (all from Depuy Synthes, West Chester, PA, USA, Ti6Al4V) were built in 3D-matic software. After assembling the internal fixation and fractures, we imported these models into the finite element analysis software (ABAQUS). An axial loading of 100 N was added to the distal end of each model. The displacements of total models and implants, the principal strains and the von Mises stresses in the plates were calculated and compared to capture the biomechanical features of the three plates. Results: The T plate, V plate and π plate represented a model displacement of 0.8414 mm, 1.134 mm and 1.936 mm, respectively. The T plate was with the implant displacement of 0.7576 mm, followed by the V plate (0.8802 mm) and the π plate (1.545 mm). The T plate had the smallest principal strain of 0.23%, the V plate showed an intermediate level of 0.28%, and the π plate had a value of 0.72%. The least peak von Mises stress was observed in the V plate with 263.6MPa, and this value was 435.6 MPa and 1050 MPa in the T plate and π plate, respectively. Conclusion: The biomechanical features of three Ti6Al4V volar locking plates in an AO type 23-A3 fracture were described in our analysis. The T plate and the V plate showed similar biomechanical performance while the π plate represented worse performance than the other two plates.

Keywords: Ti6Al4V; biomechanical performance; distal radius fractures; simulation analysis; volar plates.

Grants and funding

This study is funded by the Beijing Natural Science Foundation (7222180) and the 13th Five-year Plan for Key Discipline Construction Project of PLA (A350109).