Department of Orthopaedic Surgery, University of Minnesota, 2450 Riverside Avenue South, Suite R200, Minneapolis, MN, 55454, USA.
TRIA Orthopaedic Center, 8100 Northland Drive, Bloomington, MN, USA.
Knee Surg Sports Traumatol Arthrosc. 2017 Oct;25(10):3099-3107. doi: 10.1007/s00167-016-4117-y. Epub 2016 May 4.
Various knee anatomic imaging factors have been historically associated with lateral patellar dislocation. The characterization of these anatomic factors in a primary lateral patellar dislocation population has not been well described. Our purpose was to characterize the spectrum of anatomic factors from slice imaging measurements specific to a population of primary lateral patellar dislocation. A secondary purpose was to stratify these data by sex/skeletal maturity to better detail potential dimorphic characteristics.
Patients with a history of primary lateral patellar dislocation between 2008 and 2012 were prospectively identified. Ten MRI measurements were analysed with results stratified by sex/skeletal maturity. A '4-factor' analysis was performed to detail the number of 'excessive' anatomic factors within a single individual.
This study involved 157 knees (79 M/78 F), and 107 patients were skeletally mature. The measurements demonstrate more anatomic risk factors in this population than historical controls. Patella height and trochlear measurements are the most common 'dysplastic' anatomic factors in this population. There were differences based on sex for some patellar height measurements and for TT-TG; there were no differences based on skeletal maturity.
Primary lateral patellar dislocation patients have MRI measurements of knee anatomic factors that are generally more dysplastic than the normal population; however, there is a broad spectrum of anatomic features with no pattern predominating. Characterizing knee anatomic imaging factors in the patient with a primary lateral patellar dislocation is a necessary first step in characterizing the (potential) differences between the primary and recurrent patellar dislocation patient.
IV.
多种膝关节解剖影像学因素与外侧髌骨脱位有关。原发性外侧髌骨脱位人群中这些解剖因素的特征尚未得到很好的描述。我们的目的是描述原发性外侧髌骨脱位人群中特定于膝关节解剖影像学测量的解剖因素谱。次要目的是按性别/骨骼成熟度对这些数据进行分层，以更好地详细说明潜在的性别差异特征。
前瞻性地确定了 2008 年至 2012 年期间存在原发性外侧髌骨脱位病史的患者。对 10 项 MRI 测量结果进行分析，并按性别/骨骼成熟度进行分层。进行“4 因素”分析以详细描述单个个体中“过多”解剖因素的数量。
本研究共涉及 157 个膝关节（79 例男性/78 例女性），107 例患者骨骼成熟。与历史对照组相比，该人群的测量结果显示出更多的解剖危险因素。髌骨高度和滑车测量是该人群中最常见的“发育不良”解剖因素。一些髌骨高度测量值和 TT-TG 存在性别差异；而骨骼成熟度无差异。
原发性外侧髌骨脱位患者的膝关节解剖因素 MRI 测量值通常比正常人群更具有发育不良性；然而，存在广泛的解剖特征，没有明显的优势。在原发性外侧髌骨脱位患者中对膝关节解剖影像学因素进行特征描述是对原发性和复发性髌骨脱位患者之间（潜在）差异进行特征描述的必要第一步。
IV 级。
