Carlson Victor R, Boden Barry P, Shen Aricia, Jackson Jennifer N, Yao Lawrence, Sheehan Frances T
Functional and Applied Biomechanics Section, Department of Rehabilitation Medicine, National Institutes of Health, Bethesda, Maryland, USA.
The Orthopaedic Center, Rockville, Maryland, USA.
Am J Sports Med. 2017 Apr;45(5):1110-1116. doi: 10.1177/0363546516681002. Epub 2017 Jan 5.
The distance between the tibial tubercle (TT) and trochlear groove (TT-TG distance) is known to be greater in patients with patellar instability. However, the potential role and prevalence of pathological TT-TG distances in a large cohort of skeletally mature patients with isolated patellofemoral pain (PFP) are not clear.
To determine if the mean TT-TG distance is greater in patients with PFP, who lack a history of patellar dislocations, knee trauma, or osteoarthritis, relative to healthy controls.
Cross-sectional study; Level of evidence, 3.
A total of 50 knees (38 patients) with PFP and 60 knees (56 controls) without PFP formed the basis of this study. Magnetic resonance imaging was used to determine the TT-TG distance from 3-dimensional static scans.
The cohort with PFP demonstrated a significantly greater mean TT-TG distance relative to asymptomatic controls (13.0 vs 10.8 mm, respectively; P = .001). Among the cohort with PFP, 15 knees (30%) demonstrated TT-TG distances ≥15 mm, and 3 knees (6%) demonstrated TT-TG distances ≥20 mm.
Most adult patients with isolated PFP have elevated TT-TG distances compared with controls, which likely contributes to the force imbalance surrounding the knee.
已知髌骨不稳定患者的胫骨结节（TT）与滑车沟之间的距离（TT-TG距离）更大。然而，在一大群骨骼成熟的孤立性髌股疼痛（PFP）患者中，病理性TT-TG距离的潜在作用和患病率尚不清楚。
确定无髌骨脱位、膝关节创伤或骨关节炎病史的PFP患者相对于健康对照者的平均TT-TG距离是否更大。
横断面研究；证据等级，3级。
本研究以50个患PFP的膝关节（38例患者）和60个无PFP的膝关节（56例对照）为基础。利用磁共振成像从三维静态扫描中确定TT-TG距离。
与无症状对照相比，PFP队列的平均TT-TG距离显著更大（分别为13.0和10.8mm；P = .001）。在PFP队列中，15个膝关节（30%）的TT-TG距离≥15mm，3个膝关节（6%）的TT-TG距离≥20mm。
与对照组相比，大多数孤立性PFP成年患者的TT-TG距离升高，这可能导致膝关节周围的力失衡。
