Finite element analysis of locking plate and 1/4 tubular plate for first tarsometatarsal joint fracture-dislocation

• Published in: Journal of international medical research 2017-10, Vol.45 (5), p.1528-1534
• Main Authors: Yu, Xiao, Li, Wei-long, Pang, Qing-jiang, Zhou, Rong-li
• Format: Article
• Language: English
• Subjects: Adult; Biomechanical Phenomena; Bone Plates; Clinical Reports; Finite Element Analysis; Fracture Dislocation - surgery; Fractures, Bone - surgery; Humans; Male; Metatarsophalangeal Joint - surgery; Stress, Mechanical
• ISSN: 0300-0605; 1473-2300
• DOI: 10.1177/0300060517707114

Objective The optimal plate for fixation of tarsometatarsal joint injuries is controversial. The objective of this study was to compare the biomechanical characteristics between a locking plate and 1/4 tubular plate for first tarsometatarsal joint fracture-dislocation. Method Finite element analysis was used after establishment of a first tarsometatarsal joint fracture-dislocation model. Two implant simulations using a locking plate and five-hole 1/4 tubular plate were designed to simulate fixation of the fracture-dislocation. The displacement of the first tarsometatarsal articular surface and the stress distribution in the implants were calculated. Results A 700-N load was applied to both models. The minimum displacement of the articular surface in the locking plate and 1/4 tubular plate model was 0.6471 mm and 0.3833 mm, respectively. The maximum principal stress in the locking plate and 1/4 tubular plate was 1.212 × 103  MPa and 1.107 × 103  MPa, respectively. Conclusion Use of a 1/4 tubular plate is recommended for fixation of first tarsometatarsal joint fracture-dislocation after consideration of other factors such as economical issues.