Yu Xiao, Li Wei-Long, Pang Qing-Jiang, Zhou Rong-Li
1 Department of Orthopedics, Ningbo No. 2 Hospital, Ningbo, China.
2 Ningbo University, School of Medicine, Ningbo, China.
J Int Med Res. 2017 Oct;45(5):1528-1534. doi: 10.1177/0300060517707114. Epub 2017 Jul 31.
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 × 10MPa and 1.107 × 10MPa, 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.
目的 跗跖关节损伤的最佳固定钢板存在争议。本研究的目的是比较锁定钢板与1/4管状钢板用于第一跗跖关节骨折脱位时的生物力学特性。方法 在建立第一跗跖关节骨折脱位模型后采用有限元分析。设计了使用锁定钢板和五孔1/4管状钢板的两种植入物模拟，以模拟骨折脱位的固定。计算第一跗跖关节面的位移及植入物中的应力分布。结果 对两个模型均施加700 N的载荷。锁定钢板模型和1/4管状钢板模型中关节面的最小位移分别为0.6471 mm和0.3833 mm。锁定钢板和1/4管状钢板中的最大主应力分别为1.212×10MPa和1.107×10MPa。结论 在考虑经济等其他因素后，推荐使用1/4管状钢板固定第一跗跖关节骨折脱位。
