Longo Federico, Knell Sebastian, Nicetto Tommaso, Savio Gianpaolo, Pozzi Antonio, Isola Maurizio
Department of Small Animal Surgery, University of Zurich, Zürich, Switzerland.
Pedrani Veterinary Clinic, Zugliano, Italy.
Front Vet Sci. 2024 Nov 13;11:1456508. doi: 10.3389/fvets.2024.1456508. eCollection 2024.
To report the surgical outcomes of treating patellar luxation (PL) in dogs with surgical planning based on three-dimensional (3D) automated measurement of femoral angles.
Multicenter retrospective study.
Forty-one dogs with PL underwent preoperative computed tomography (CT). Three-dimensional femur models were exported as stereolithographic files, and imported into computer-aided design (CAD) software where 3D measurements were performed. The anatomical laterodistal femoral (aLDFA), femoral neck (FNA), and femoral torsion (FTA) angles were recorded. Surgical records, complications, radiographic femoral postoperative alignment, preoperative and postoperative lameness evaluation, and patellar position were reviewed. The success of the surgical outcome was based on the presence of normal patellar tracking at the last clinical recheck.
Forty-seven limbs were included; 46% of the cases (22/47) were affected by grade 3 PL. Mean (±SD) 3D aLDFA, FNA, and FTA measurements were 101.4° (±3.6), 132.5° (±2.6), and 17.6° (±4.3) in dogs with medial patellar luxation (MPL) and 89.3° (±7.6), 134.8° (±2.9), 36.9° (±5.3) with lateral patellar luxation (LPL), respectively. Based on the 3D preoperative planning, corrective osteotomies were performed in 34 of 47 cases. The mean radiographic follow-up was 4.7 months. At the final follow-up, PL was successfully treated in 45 of 47 cases. Patella reluxated in five cases. In three of five cases, the 3D automated plan was not followed by the surgeon.
Surgical treatment of PL based on 3D femoral measurements successfully corrected PL in 45 of 47 cases (96%). This is the first study reporting the use of 3D automated femoral angle measurement in clinical cases affected by PL.
报告基于股骨角度的三维（3D）自动测量进行手术规划治疗犬髌骨脱位（PL）的手术结果。
多中心回顾性研究。
41只患有PL的犬接受术前计算机断层扫描（CT）。三维股骨模型以立体光刻文件形式导出，并导入计算机辅助设计（CAD）软件进行3D测量。记录解剖学上的股骨外侧远端角（aLDFA）、股骨颈角（FNA）和股骨扭转角（FTA）。回顾手术记录、并发症、术后股骨X线对线、术前和术后跛行评估以及髌骨位置。手术结果的成功基于最后一次临床复查时髌骨轨迹正常。
共纳入47条肢体；46%的病例（22/47）为3级PL。内侧髌骨脱位（MPL）犬的平均（±标准差）3D aLDFA、FNA和FTA测量值分别为101.4°（±3.6）、132.5°（±2.6）和17.6°（±4.3），外侧髌骨脱位（LPL）犬分别为89.3°（±7.6）、134.8°（±2.9）、36.9°（±5.3）。基于3D术前规划，47例中有34例进行了矫正截骨术。平均X线随访时间为4.7个月。在最后一次随访时，47例中有45例PL得到成功治疗。5例髌骨复发。在5例中的3例中，外科医生未遵循3D自动规划。
基于3D股骨测量的PL手术治疗在47例中的45例（96%）成功矫正了PL。这是第一项报告在受PL影响的临床病例中使用3D自动股骨角度测量的研究。
