Planned wedge size compared to achieved advancement in dogs undergoing the modified Maquet procedure

• Published in: Veterinary and comparative orthopaedics and traumatology Vol. 28; no. 6; p. 379
• Main Authors: Kapler, M W, Marcellin-Little, D J, Roe, S C
• Format: Journal Article
• Language: English
• Published: Germany 01.01.2015
• Subjects: Animals; Anterior Cruciate Ligament - surgery; Anterior Cruciate Ligament Injuries; Biomechanical Phenomena; Dimensional Measurement Accuracy; Dog Diseases - surgery; Dogs - injuries; Dogs - surgery; Osteotomy - methods; Osteotomy - veterinary; Patellar Ligament - anatomy & histology; Retrospective Studies; Tibia - pathology; Tibia - surgery; Treatment Outcome; MMP; Cranial cruciate ligament; Maquet procedure; stifle
• ISSN: 0932-0814
• DOI: 10.3415/VCOT-15-02-0026

To evaluate the patellar ligament to tibial plateau angle (PL-TPA) and amount of achieved advancement in dogs that underwent the modified Maquet procedure; compare wedge sizes recommended using two different planning techniques (Orthomed and modified tibial tuberosity advancement); and evaluate anatomical factors that predict the wedge size required to obtain a 90° PL-TPA. Pre- and postoperative radiographs of dogs that had a modified Maquet procedure performed were evaluated for the following: calculated wedge size using two different planning techniques, the actual wedge size used, the achieved tibial tuberosity advancement, and the changes in PL-TPA. Anatomical measurements of the tibia were evaluated and correlated with the actual wedge size. Of the 38 modified Maquet procedures identified, 53% (n = 20) had a PL-TPA of 90° ± 5°. Actual achieved advancement of the tibial tuberosity was 30% less than the wedge size used. Changes in PL-TPA and tibial width persisted at eight weeks postoperatively without loss of advancement. The two planning techniques did not result in a significantly different selection of wedge size. Current planning techniques for the modified Maquet procedure result in under-advancement of the tibial tuberosity. Both measurement techniques evaluated do not result in appropriate advancement.