Radiological Evaluation of pre- and postoperative Patellar Height in TPLO and TTA Patients

Publikationen als Autor:in / Herausgeber:in der Vetmeduni

Tichy, Alexander

Abstrakt

Introduction Proximodistal positional changes of the patella influence the patellar luxation complex. This study focuses on proximodistal positional changes of the patella associated with TPLO and TTA as corrective osteotomies in dogs with cranial cruciate ligament rupture. We evaluate possible alterations of patellar height after TPLO or TTA. Materials and Methods We evaluated pre- and postoperative mediolateral stifle radiographs of 78 client-owned dogs undergoing TPLO or TTA surgery due to a cranial cruciate ligament rupture without patellar disease using the Blackburne-Peel index (BPI), the Insall-Salvati index (ISI) and the tibial plateau-patellar angle (TPPA) to measure patellar height. We evaluated measurements based on the range of patella norma defined in recent veterinary literature. Results Pre- and postoperative measurements of BPI, ISI and TPPA differed significantly in TPLO and TTA dogs. BPI increased after TPLO in 92 % of the dogs, showing a tendency towards patella alta in 39 % of the dogs. BPI decreased in 87 % of the TTA dogs, resulting in patella baja in five dogs (13 %). ISI decreased after TPLO in 89 % and after TTA in 71 % of the dogs, revealing a postoperative patella baja in five (13 %) TPLO and ten (26 %) TTA dogs. BPI and ISI measurements correlated significantly pre- and postoperatively in TPLO and preoperatively in TTA patients. TPPA increased after TPLO in 89 % but decreased after TTA in 92 % of the dogs. TPPA correlated inconsistently with the results of BPI and ISI. BPI, ISI and TPPA tended to increase with body height but there were no statistically significant differences between the three height groups. Conclusion TPLO and TTA influence patellar height in dogs and might create patella baja or alta. The results with different methods of measurement should be compared and interpreted with caution.

Dokumententyp

Originalarbeit

Open Access Type

Diamond

DOI

10.5680/wtm000001