Radiographic outcome and complications of tibial plateau leveling osteotomy stabilized with an anatomically contoured locking bone plate

Authors


  • Work was completed at the Cummings School of Veterinary Medicine, Tufts University, The Ohio State University, College of Veterinary Medicine, Gulf Coast Veterinary Specialists, Oakland Small Animal Veterinary Clinic, Texas A&M University, College of Veterinary Medicine, and the Faculty of Veterinary Science, University of Sydney.

Corresponding Author

Michael Kowaleski, DVM, Tufts Cummings School of Veterinary Medicine, Veterinary Clinical Sciences, 200 Westboro Road, North Grafton, MA 01536. E-mail: mike.kowaleski@tufts.edu

Abstract

Objective

To evaluate the short-term clinical performance of an anatomically pre-contoured, locking plate in dogs undergoing tibial plateau leveling osteotomy (TPLO) for cranial cruciate ligament (CrCL) disease.

Study Design

Prospective, multi-center clinical study.

Animals

Dogs (n = 56) undergoing TPLO.

Methods

Signalment and operative data were recorded. Preoperative, postoperative, and follow-up tibial plateau angle (TPA) were measured from radiographic images. Intraoperative and postoperative complications were recorded; the latter were categorized as minor if additional surgery was not necessary, and major if surgery was needed to resolve the complication. Bone healing was scored and change in tibial plateau angle (TPACH) between postoperative and follow up radiographic images was calculated.

Results

Mean (±SD) preoperative TPA was 28.6 ± 3.8°, and mean postoperative TPA was 4.8 ± 1.9°. Four intraoperative complications (7.1%) including 2 cases of intra-articular screw placement, 3 minor postoperative complications (5.4%), and no major or catastrophic postoperative complications occurred. Median bone healing grade was 4/4 (excellent union >75% healing). Mean TPACH was 0.15 ± 1.32°.

Conclusions

Use of this anatomically contoured, locking TPLO plate by experienced surgeons is associated with accurate tibial plateau leveling, reliably excellent bone union at follow-up exam, minimal TPACH, and a lower complication rate than previously reported. Confining contouring to the distal shaft of the plate ensures there is precise apposition to the tibial diaphysis and mitigates the risk of intra-articular screw placement.

Ancillary