Does Use of a Jig Influence the Precision of Tibial Plateau Leveling Osteotomy Surgery?


  • Presented in part at the European College of Veterinary Surgeons Annual Meeting, Seville, June 2006.

Address correspondence to Malcolm G. Ness, Croft Veterinary Hospital, 37–39 Croft Road, Blyth, Northumberland, NE24 2EL, UK. E-mail:


Objective— To compare the precision of tibial plateau leveling osteotomy (TPLO) surgery when performed with or without a jig.

Study Design— Cadaveric study.

Sample Population— Cadaveric, adult greyhound hindlimbs (n=9 pair).

Methods— TPLO (n=18) was performed on each limb pair; 1 with and 1 without use of a jig. Measurements taken from pre- and postsurgical radiographs were osteotomy position, tibial plateau angle (TPA), varus-valgus malalignment, and tibial torsion. The null hypothesis was that TPLO precision was not affected by use of a jig. Student's t-test was used to investigate differences in TPA, osteotomy location, and frequency and extent of iatrogenic limb malalignment; P<.05 was considered significant.

Results— There were no significant differences in postsurgical TPA, tibial crest thickness, varus-valgus malalignment, or tibial torsion between TPLOs performed with or without a jig. Osteotomy location was significantly more distal when a jig was used (P=.03).

Conclusions— Jig use did not improve the precision of TPLO surgery.

Clinical Relevance— Performing TPLO without a jig should reduce surgery time, eliminate complications related to placement of the distal jig pin and allow unhindered positioning of the osteotomy.