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KMID : 1094020160330050295
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Journal of Veterinary Clinics
2016 Volume.33 No. 5 p.295 ~ p.299
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Bilateral Patellar Groove Replacement in a Dog with Iatrogenic Trochlear Groove Damage
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Kim Yong-rak
Park Yun-Sik
Park Ji-Young
Jeong Seong-Mok
Lee Hae-Beom
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Abstract
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A 2-year-old, 1.94 kg spayed female Toy Poodle was referred for revision surgery for patellar reluxationfollowing surgery for bilateral medial patellar luxation (MPL). Intermittent non-weight-bearing lameness of the righthindlimb and weight-bearing lameness of the left hindlimb were evident on general inspection. A physical examinationrevealed that there was a bilateral grade 4 MPL. On radiographs, the medial and lateral trochlear ridge was bilaterallyworn out. Patellar groove replacement (PGR) was performed in two stages to replace the bilateral femoral trochleathat had a severely worn out groove. Corrective femoral osteotomy with increasing anteversion angle, tibial tuberositytransposition, medial releasing, lateral imbrications and PGR were performed on the right hindlimb. Six months aftersurgery on the right hindlimb, a PGR prosthesis was positioned medially on the frontal plane and tibial tuberositytransposition and lateral imbrications were performed on the left hindlimb. Two weeks after surgery, reluxation of thepatella occurred on the left hindlimb. The tibial tuberosity transposition was performed to realign the patella morelaterally than the previous surgery, and a patellar sling was applied. Two years after the last surgery, the patient showedno pain on the stifle joint and satisfactory weight-bearing ambulation. Reluxation did not recur. PGR maybe a successfultreatment for dogs with iatrogenically damaged and/or worn out patellar grooves.
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KEYWORD
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medial patellar luxation, patellar groove replacement
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