Abstract
Because in medial patellar luxation the patella luxates toward the inside during the extension of the stifle joint, luxation tends to recur when surgical repair is done using trochleoplasty alone. Therefore, a variety of surgical techniques are often used in combination depending on each case. The authors have devised a surgical method that, instead of deepening the trochlear groove, elevates the medial trochlear ridge of the distal femur, and applied this method to two dogs exhibiting grade 3 medial patellar luxation. The procedure is to elevate the medial crest by removing an asymmetrical wedge from the trochlear groove, rotating it 180 degrees, and replacing it in the recess. With this surgical method, the authors have successfully prevented the recurrence of luxation during the extension of the stifle joint. Both dogs had a limb operated on using this method and showed good prognosis, with no recurrent luxation or gait abnormality. Postoperative CT and radiographic images confirmed the elevation of the medial trochlear ridge.
