Retrospective study of medial patellar luxation surgery using combination of four techniques without bone reconstruction in non-flattened femoral sulcus: 133 cases in 10 years" period (2006-2015)

Abstract

To assess signalment and outcome for dogs surgically treated for non-flattened femoral sulcus medial patellar luxation with combined soft tissue reconstruction techniques, cranial sartorius desmotomy, medial retinacular fascia release, patellar antirotational suture, and fascia lata overlapping, medical records from January 2006 to December 2015 were reviewed. Information obtained from medical records of cases in the study population included breed, age, weight, type of patellar luxation (unilateral or bilateral), grade of patellar luxation, lameness score record, time of last followup, and time of luxation recurrent. The data were analyzed to determine factors influencing outcomes. Twenty-three dogs from 133 presented recurrent patellar luxation. A total of 12 from the 23 recurrent patellar luxation dogs were bilateral (52%) and 11 (48%) were unilateral. The time of recurrence after surgery varied from 1 month to 79 months. From the medical records as on the day of the study, it was found that the longest time that there was no recurrence in dogs was 10 years. It was found that, among the many factors, only grade 4 patellar luxation was a risk factor of considerable recurrence rate (OR=12.44, P=0.02). These results suggest that the combined four soft tissue reconstruction techniques demonstrated excellent outcome in the treatment of medial patellar luxation (with non-flattened femoral sulcus) in small breed dogs. At the same time, it can be stated that bone reconstruction technique is not always necessary.

Keywords

• patellar luxation
• dog
• surgery
• recurrence
• soft tissue