Biomechanical examination of patellar tendon ruptures repaired with a tendon graft: an experimental study
İlker Karahasanoğlu1, Osman Yoloğlu2, Atilla Çıtlak3, Servet Kerimoğlu4, Ahmet U. Turhan4
1Ardahan Devlet Hastanesi, Ortopedi ve Travmatoloji Kliniği, Ardahan, Türkiye
2Hopa Devlet Hastanesi, Ortopedi ve Travmatoloji Kliniği, Artvin, Türkiye
3Giresun Üniversitesi Tıp Fakültesi, Ortopedi ve Travmatoloji Anabilim Dalı, Giresun, Türkiye
4Karadeniz Teknik Üniversitesi Tıp Fakültesi, Ortopedi ve Travmatoloji Anabilim Dalı, Trabzon, Türkiye
Keywords: Biomechanical study; cadaver knee; interference screw; patellar tendon rupture.
Objectives: This study aims to perform an experimental examination of the patellar tendon grafts repaired using an interference screw and free tendon graft. Material and methods: Twelve knees of the lower limbs which were amputated due to circulatory disease were included in this study. The knees were removed from all soft tissues including patellar tendons. A tendon graft was fixed onto tuberositas tibia through the distal portion of the knee using an interference screw. The patellar tendon graft and tuberositas tibia complex were fixed at the lower and upper part of the testing machine. The distraction force of the bonetendon- bone complex was recorded using the testing machine.
Results: Both patellar and tibial ruptures were detected. The pullout force of the tendons was found to be 810 at maximum and 420 N at minimum. The mean pullout force was 600 N in men and 525 N in women with an overall mean of 575 N.
Conclusion: Our study results showed that patellar tendon repair with grafting had a similar pullout force compared to other repair techniques. In case of a neglected rupture of the patellar tendon, in particular, grafting is recommended.