Abstract
Objectives This study aims to report complications and long-term outcomes of combined tibial
plateau leveling osteotomy and tibial tuberosity transposition (TPLO-TTT) for treatment
of concurrent cranial cruciate ligament rupture and medial patellar luxation (MPL).
Study Design This is a retrospective study. Dogs that underwent TPLO-TTT for treatment of combined
cranial cruciate ligament rupture and grade III or IV MPL were included. Signalment,
fixation method, and complications were recorded. Long-term outcome assessment (minimum
1 year postoperatively) was performed through clinical and radiographic reexamination
at the authors' institution.
Results Twenty-four stifles (22 dogs) were included. Twenty-one stifles had a grade III MPL,
and 3 stifles had grade IV MPL. Four major complications consisting of surgical site
infection (n = 3) and recurrent grade II MPL (n = 1) were observed. Dogs with surgical site infections were successfully treated
with implant removal and oral antibiotics. No additional surgery was performed for
the patient with recurrent MPL as no signs of lameness were observed. Minor complications
occurred in five cases. At long-term evaluation (median: 27 months; range: 12–67 months),
21/22 dogs were clinically sound and 23/24 stifles had a complete resolution of MPL.
Conclusion TPLO-TTT can be considered as an effective surgical option to treat patients with
concurrent cranial cruciate ligament rupture and MPL with a relatively low major complication
rate. Owners should be warned of the potential need for implant removal.
Keywords tibial plateau levelling osteotomy - tibial tuberosity transposition - cranial cruciate
ligament rupture - medial patellar luxation - dog
