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Type of publication: Journal Article
Type of document: Full Paper

Year: 2020

Authors: Lechner, B; Handschuh, S; Bockstahler, B; Tichy, A; Peham, C; Schnabl-Feichter, E

Title: Comparison of a novel extracapsular suture technique with a standard fabellotibial suture technique for cranial cruciate ligament repair using a custom-made limb-press model in cats.

Source: J Feline Med Surg. 2020 22 (10) 1016-1024.

Authors Vetmeduni Vienna:

Bockstahler Barbara
Handschuh Stephan
Lechner Bettina
Peham Christian
Schnabl-Feichter Eva
Tichy Alexander

Vetmed Research Units
University Equine Clinic, Clinical Unit of Equine Surgery
University Clinic for Small Animals, Clinical Unit of Small Animal Surgery
Platform Bioinformatics and Biostatistics

The aim of our study was to compare the standard fabellotibial suture with Mini TightRope fixation for the treatment of a cranial cruciate ligament (CCL) rupture using a feline custom-made limb press.Cadaveric hindlimbs of 10 cats were inserted in the limb press at predefined joint angles and loads of 10% and 30% body weight (BW) were applied. Mediolateral radiographs were taken and three-dimensional coordinates were recorded using a microscribe digitiser, with intact and transected CCLs and after either fabellotibial suture or Mini TightRope fixation were performed. Different distances and angles from radiographs or microscribe coordinates were analysed.Radiographic distances from the femoral condyle to the cranial edge of the tibia (X1-X2) were higher in CCL-deficient stifles than in intact stifles at 10% and 30% BW loads. All fabellotibial sutures and Mini TightRope fixations neutralised excessive cranial tibial thrust. A significant difference in the distance between the patella and tibial tuberosity (D2) was observed between CCL-deficient limbs and Mini TightRope-fixed limbs at 10% BW load (P<0.04). A significant difference in the distance between the tibial tuberosity and lateral collateral ligament of the femur (D3) was observed between the intact and transected CCLs on the left legs at 10% BW load (P<0.003) and on both legs at 30% BW load (P<0.002). Furthermore, we observed significant differences between CCL-deficient left legs and Mini TightRope-treated legs at 10% BW load (P<0.003). With regard to fabellotibial suture-treated legs, we observed significant differences between transected limbs and fixed limbs at 30% BW load (P<0.004). W1 (craniocaudal angle) and W2 (mediolateral angle) showed significant differences between intact and transected CCLs and between transected and fixed limbs at 30% BW load (P<0.004).Fixation of CCL-deficient stifles with lateral fabellotibial suture, as well as Mini TightRope tightened with a 20‚ÄČN load, produces good biomechanical stability, as detected via radiographic assessment.

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