Patellar Proximo-Distal Displacement following Modified Maquet Technique Is Not Predictive of Patellar Luxation

Thomas Elie Giansetto, Emilie Pierrot, Pierre P Picavet, Michael Lefebvre, Albane Rives, Frédéric Farnir, Stéphanie Claeys, Marc Balligand
Vet Comp Orthop Traumatol. 2022 Dec 31. doi: 10.1055/s-0042-1757590.

Objective: The aim of this study was to test the low sensitivity of the Allberg and Miles index to the stifle opening angle, evaluate the displacement of the patella after a Modified Maquet Technique using this index and assess the incidence of patellar luxation post-Modified Maquet Technique in dogs.

Materials and methods: Medical records were reviewed from 2012 to 2017. Allberg Miles index were determined for each stifle pre- and postoperatively, as well as the stifle joint opening of each case. Occurrence of patellar luxation was recorded.

Results: 137 stifles on 116 dogs were reviewed. The stifle opening angle did not influence the Allberg Miles index. Pre- and postoperative index showed a distal displacement of the patella after a Modified Maquet Procedure, especially at 135° of stifle opening angle. Only 1/137 cases demonstrated patellar luxation after the surgery.

Conclusion: Based on our statistical analysis, we were able to conclude that within the maximum stifle opening angle range recorded in our series of cases; the Allberg Miles index variation was not significant. While patellar baja is clearly induced by the Modified Maquet Technique, the latter did not seem to predispose patients to post-operative patellar luxation in our study population.