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Influence of fixation systems on complications after tibial plateau leveling osteotomy in dogs greater than 45.4 kilograms (100 lb)
- Chiu, King Wa, Amsellem, Pierre M., Yu, Jenny, Ho, Pui Shan, Radasch, Robert
- Veterinary surgery 2019 v.48 no.4 pp. 505-512
- cranial cruciate ligament, dogs, medical records, odds ratio, osteotomy, postoperative complications, regression analysis, risk, stifle
- OBJECTIVE: To determine the influence of 3 fixation systems on complications rate after tibial plateau leveling osteotomy (TPLO) in dogs >45.4 kg. STUDY DESIGN: Retrospective case series. SAMPLE POPULATION: Dogs (N = 287, 342 stifles) >45.4 kg with cranial cruciate ligament tear treated with TPLO. METHODS: The medical records of dogs treated with TPLO were reviewed for fixation and postoperative complications, with a follow‐up of at least 6 weeks. A random effects logistic regression model was used to evaluate the association between the type of TPLO fixation system and complications. RESULTS: The fixation systems included a 3.5‐mm broad TPLO plate alone (8P; 78.4%), a 3.5‐mm broad TPLO plate with SOP (String of Pearls) plate (8AP; 14.9%), and a 3.5‐mm standard TPLO plate (6P; 6.7%). Among the included stifles, 214 (62.6%) fixation systems were classified as locking, and 128 (37.4%) were classified as nonlocking. The fixation system was predictive of complications. The 8P had the lowest odds ratio for complication among the 3 fixation systems. Odds of developing complications were higher with the 8AP fixation system than with the 8P fixation system. Locking fixation eliminated the association between weight and complication rate. CONCLUSION: Fixation of a TPLO with the 8AP increased the risk of complications compared with the 8P in this population of large dogs. CLINICAL SIGNIFICANCE: Locking fixation of TPLO with a 3.5‐mm broad TPLO plate alone should be considered in large dogs because it may reduce complications.