Objective This study aimed to evaluate frequency, location and severity of cartilage pathology in dogs with naturally occurring cranial cruciate ligament (CCL) disease.

Study Design Stifle arthroscopic video recordings (n = 120) were reviewed. A modified Outerbridge classification system (MOCS) (0–4) was used to score cartilage at 10 locations in the femorotibial (medial and lateral femoral condyles and tibial plateaus) and patellofemoral compartments (proximal, middle and distal locations of the patella and femoral trochlear groove) of the stifle joint. Synovial pathology was scored and the presence of a medial meniscal tear was recorded. A Kruskal–Wallis test was used to evaluate association of location and synovitis with cartilage score; and presence of meniscal tear with cartilage and synovitis scores. Bonferroni correction was utilized and p < 0.05 was considered significant.

Results Cartilage pathology and synovitis were identified in all joints. Overall cartilage severity scores were low (median MOCS 1). The median MOCS of the proximal trochlear groove (2) was significantly higher than all other locations evaluated. Higher synovitis scores were significantly associated with higher cartilage severity scores and a medial meniscal tear had no association with cartilage severity scores or synovitis.

Conclusion Arthroscopic articular cartilage lesions are common in dogs with CCL disease at the time of surgical intervention, although the severity of cartilage damage is mild. The proximal trochlear groove of the femur had the most severe cartilage score in the stifle joint.

目的 本研究旨在评估患有自然发生的颅交叉韧带 (CCL) 疾病的狗的软骨病理的频率、位置和严重程度。

研究设计 对 Stifle 关节镜视频记录 ( n  = 120) 进行了审查。使用改良的 Outerbridge 分类系统 (MOCS) (0-4) 对股胫骨（内侧和外侧股骨髁和胫骨平台）和髌股隔间（髌骨和股骨滑车的近端、中间和远端位置）的 10 个位置的软骨进行评分。膝关节的凹槽）。对滑膜病理进行评分并记录内侧半月板撕裂的存在。Kruskal-Wallis 检验用于评估位置和滑膜炎与软骨评分的关联；半月板撕裂伴软骨和滑膜炎评分。使用 Bonferroni 校正，p  < 0.05 被认为是显着的。

结果 在所有关节中均鉴定出软骨病理学和滑膜炎。总体软骨严重程度评分较低（中值 MOCS 1）。近端滑车槽 (2) 的中值 MOCS 显着高于所有其他评估位置。较高的滑膜炎评分与较高的软骨严重程度评分显着相关，内侧半月板撕裂与软骨严重程度评分或滑膜炎无关。

结论 关节镜下关节软骨病变在 CCL 病犬中在手术干预时很常见，尽管软骨损伤的严重程度是轻微的。股骨近端滑车槽在膝关节中的软骨评分最严重。