Accuracy of tibial osteotomy placement using 2 different tibial plateau leveling osteotomy jigs.

Abstract

OBJECTIVE: To report the accuracy of osteotomy position in dogs undergoing tibial plateau leveling osteotomy (TPLO) and to evaluate the effect of 2 different TPLO jig and saw systems on tibial osteotomy position. STUDY DESIGN: Retrospective case series. ANIMALS: Dogs (n&#x2009;=&#x2009;124; 134 TPLO). METHODS: Medical records (2004-2005; 2008-2011) and stifle radiographs of 2 groups of dogs that had TPLO to treat cranial cruciate ligament disease were reviewed. One group had a TPLO performed using an alignment jig system alone (Slocum group), whilst in the other group, an alignment jig system combined with a saw guide (Synthes group) was used. Postoperative radiographs were examined and the distance and direction of the centroid of the osteotomy was compared to the intended osteotomy position. RESULTS: The absolute distance of eccentricity (DOE) in the Slocum group (5.6&#x2009;&#xb1;&#x2009;2.5&#x2009;mm) was significantly greater than that of the Synthes group (3.4&#x2009;&#xb1;&#x2009;1.8&#x2009;mm; P&#x2009;<&#x2009;.01). DOE was caudal and distal in 79% of cases. CONCLUSIONS: Most tibial osteotomies were centered at a point distal and caudal to the intended osteotomy position. Use of a TPLO system with a saw guide was associated with more accurate placement of the osteotomy and more accurate leveling of the tibial plateau.