Tsakoniti Aikaterini E, Mandalidis Dimitris G, Athanasopoulos Spyros I, Stoupis Christoforos A
Sports Physical Therapy Laboratory, Department of Sports Medicine and Biology of Exercise, Faculty of Physical Education and Sports Science, National and Kapodestrian University of Athens, 8 Isminis Street, 172 37 Daphne, Greece.
Surg Radiol Anat. 2011 Mar;33(2):97-104. doi: 10.1007/s00276-010-0715-4. Epub 2010 Aug 27.
The purpose of the present study was to investigate whether an increased quadriceps angle (Q-angle) has an effect on patellar positioning and/or the thickness of the medial and lateral tibiofemoral and patellofemoral articular cartilage and menisci, in a group of young asymptomatic individuals. These individuals were detected in a previous study with a decreased anatomical cross-sectional area of the vastus medialis and lateralis as a result of an increased Q-angle. Patellar positioning and the thickness of the articular cartilages were determined in 19 asymptomatic male individuals with high Q-angle (HQ-angle) (18.5° ± 2.6°) using magnetic resonance imaging (MRI). Seventeen male counterparts with low Q-angle (10.1° ± 1.9°) were used for comparison. The position of the patella was determined by measuring the sulcus angle, the lateral patella tilt, the patella-lateral condyle index and the bisect offset (BSO) with the quadriceps relaxed. The BSO, was also measured with the quadriceps under maximum isometric voluntary contraction. The thickness of the articular cartilages of the lateral and medial femoral condyles, the tibial condyles, the patellar facets and the menisci were also measured. Our data revealed that healthy individuals with HQ-angle are unlikely to demonstrate any changes in the position of the patella and/or the thickness of the knee articular cartilages. The decreased anatomical area of the vastus medialis and an almost equally atrophied vastus lateralis, which was previously observed in this group of individuals may prevent in part the misalignment of the patella and early wear of the tibiofemoral and patellofemoral articular cartilages.
本研究的目的是调查在一组无症状的年轻个体中，增大的股四头肌角（Q角）是否会对髌骨位置和/或胫股关节及髌股关节内外侧软骨和半月板的厚度产生影响。在之前的一项研究中检测到，这些个体因Q角增大，股内侧肌和股外侧肌的解剖横截面积减小。使用磁共振成像（MRI）对19名高Q角（HQ角）（18.5°±2.6°）的无症状男性个体的髌骨位置和关节软骨厚度进行了测定。选取17名低Q角（10.1°±1.9°）的男性作为对照。在股四头肌放松状态下，通过测量沟角、髌骨外侧倾斜度、髌骨-外侧髁指数和平分线偏移（BSO）来确定髌骨位置。在股四头肌最大等长自主收缩状态下也测量了BSO。还测量了股骨内外侧髁、胫骨髁、髌面和半月板的关节软骨厚度。我们的数据显示，HQ角的健康个体不太可能出现髌骨位置和/或膝关节软骨厚度的任何变化。此前在这组个体中观察到的股内侧肌解剖面积减小以及几乎同样萎缩的股外侧肌，可能在一定程度上防止了髌骨排列不齐以及胫股关节和髌股关节软骨的早期磨损。
