Safety of the application of Rigidfix cross-pin system via different tibial tunnels for tibial fixation during anterior
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(2020) 21:736
RESEARCH ARTICLE
Open Access
Safety of the application of Rigidfix crosspin system via different tibial tunnels for tibial fixation during anterior cruciate ligament reconstruction Jian Wang1†, Hua-qiang Fan2†, Wenli Dai3, Hong-Da Li2, Yang-pan Fu2, Zhenhuang Liu2, Chang-ming Huang2 and Zhanjun Shi1*
Abstract Background: We investigate the safety of the application of the Rigidfix cross-pin system via different tibial tunnels in the tibial fixation during anterior cruciate ligament (ACL) reconstruction. Methods: Five adult fresh cadaver knees were fixed with the Rigidfix cross-pins in the tibial fixation site during ACL reconstruction. Two different tibial tunnel groups were established: in group A, the tunnel external aperture was placed at the 25° angle of coronal section; in group B, the tunnel external aperture was placed at the 45° angle of coronal section. The guide was placed at the plane 0.5 mm below articular facet through the tibial tunnel, with three rotation positions set at 0°, 30°, and 60° slopes. The incidences of iatrogenic injuries at tibial plateau cartilage (TPC), medial collateral ligament (MCL), and patellar tendon in three different slope angles were calculated in groups A and B and the results were analyzed by using chi square test. Results: The iatrogenic injuries at MCL, TPC, and patellar tendon could occur after the Rigidfix cross-pin system was placed 5 mm below tibial plateau cartilage for ACL reconstruction. The incidences of TPC injury (χ2 = 5.662, P = 0.017) and MCL injury (P = 0.048, Fisher exact probability method) were significantly lower in group A than in group B. However, the incidence of patellar tendon injury showed no significant difference between these two groups (χ2 = 0.120, P = 0.729). Conclusions: When the Rigidfix cross-pin system is used for ACL reconstruction at the tibial fixation site, the external aperture of tibial tunnel should not be placed at the excessively posterosuperior site, to avoid MCL and TPC injuries. Keywords: Anterior cruciate ligament, Rigidfix, Tibia, Bone tunnel, Iatrogenic injury
* Correspondence: [email protected] † Jian Wang and Hua-qiang Fan contributed equally to this work. 1 Department of Orthopaedic Surgery, Nanfang hospital, Southern Medical University, Guangdong 510515, People’s Republic of China Full list of author information is available at the end of the article © The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitt
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