Role of screw proximity in the fixation of transverse patellar fractures with screws and a wire

Chih Wei Chang, Yen Nien Chen, Chun Ting Li, Yu Hsuan Chung, Chih Han Chang, Yao Te Peng

研究成果: Article同行評審

7 引文 斯高帕斯(Scopus)

摘要

Purpose: Clinical and biomechanical studies have reported that using supportive screws and a wire instead of the common Kirschner wires for modified tension band wiring improves the stability of fractured patellae. However, the effect of screw proximity on the fixation of a fractured patella remains unclear. Therefore a numerical study was conducted to examine the effects of screw proximity on biomechanical responses in a simulated patellar fracture fixed using two parallel cannulated screws and anterior tension band wiring. Methods: A patellar model with a transverse fracture and loads simulating patellar tendon forces applied on the patella were used in the present simulation. The surgical fixation consisted of two 4.0-mm parallel partially threaded cannulated screws with a figure-of-eight tension band made using a 1.25-mm stainless steel wire. Biomechanical responses at two screw proximities, 5 and 10 mm from the leading edge of the patella, were investigated. Results: Superficial screw placement (5 mm) yielded higher stability, lower wire loads, and lower bone contact pressures than the deep placement (10 mm). The deep placement of screws exerted a higher load on the wire but a lower force on the screw than superficial placement did. Conclusion: This is the first numerical study to examine the effects of screw location on the fixation of a fractured patella using cannulated screws and tension band wiring. Considering the favorable biomechanical responses, superficial placement (5 mm below the leading edge of the patella) is recommended for screw insertion when treating a transverse fractured patella.

原文English
期刊Journal of Orthopaedic Surgery
26
發行號3
DOIs
出版狀態Published - 2018 五月 1

All Science Journal Classification (ASJC) codes

  • 手術

指紋

深入研究「Role of screw proximity in the fixation of transverse patellar fractures with screws and a wire」主題。共同形成了獨特的指紋。

引用此