Patellar articular overlap is better associated with patellar alignment during weight-bearing than traditional measures of patellar height

IF 1.6 4区医学 Q3 ORTHOPEDICS

Knee Pub Date : 2024-07-15 DOI:10.1016/j.knee.2024.06.008

Thomas Demirjian , John Crues III , Kai-Yu Ho , Liang-Ching Tsai , Christopher Powers

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引用次数: 0

Abstract

Background

A consequence of a high riding patella is reduced osseous stability and malalignment of the patella (i.e., lateral patellar tilt and displacement). Although quantification of patellar height is a routine part of the radiographic examination of the patellofemoral joint, it is not clear which measure of patellar height is best associated with patella alignment.

Hypothesis/Purpose

To determine if patellar articular overlap (PAO) is better associated with lateral patellar tilt and lateral patellar displacement compared to traditional measures of patellar height. Study Design: Cross-sectional.

Methods

Magnetic resonance images were obtained from 50 female participants (21 with patellofemoral pain and 29 healthy controls) under loaded conditions (25–35% bodyweight) at 15–20 degrees of knee flexion. Measurements of lateral patellar tilt and displacement as well as the PAO, Insall-Salvati ratio (ISV), Caton Deschamps-index (CD-index), or the Blacburn Peel-index (BP-index) were obtained from sagittal and axial plane images.

Results

The PAO was found to significantly correlated with lateral patellar tilt (r = −0.77, p < 0.001). In contrast, the ISV, CD-index, or the BP-index were not found to be associated with lateral patellar tilt (r = 0.13, p = 0.34; r = −0.14, p = 0.33; r = −0.08, p = 0.56, respectively). Both the PAO and ISV were found to be significantly correlated with lateral patellar displacement (r = −0.52, p < 0.001; r = 0.43, p = 0.002, respectively). Conversely, the CD-index and BP-index were not found to be associated with lateral patellar displacement (r = 0.03 p = 0.83; r = 0.05 p = 0.74, respectively).

Conclusion

Of the measures of patellar height evaluated, the PAO was found to provide the greatest association with lateral patellar tilt and displacement.

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与传统的髌骨高度测量方法相比，髌骨关节重叠与负重时的髌骨对齐关系更好

背景髌骨过高会导致骨稳定性降低和髌骨对位不良（即髌骨外侧倾斜和移位）。假设/目的与传统的髌骨高度测量方法相比，确定髌骨关节重叠（PAO）是否与髌骨外侧倾斜和髌骨外侧移位有更好的关联。研究设计：方法在膝关节屈曲 15-20 度的加载条件下（25-35% 体重），从 50 名女性参与者（21 名髌骨股骨痛患者和 29 名健康对照组）处获取磁共振图像。通过矢状面和轴向面图像测量了髌骨外侧倾斜和位移，以及 PAO、Insall-Salvati 比值（ISV）、Caton Deschamps 指数（CD-index）或 Blacburn Peel 指数（BP-index）。相比之下，ISV、CD 指数或 BP 指数与髌骨外侧倾斜没有关联（分别为 r = 0.13，p = 0.34；r = -0.14，p = 0.33；r = -0.08，p = 0.56）。PAO 和 ISV 均与髌骨外侧移位显著相关（r = -0.52，p = 0.001；r = 0.43，p = 0.002）。相反，CD 指数和 BP 指数与髌骨外侧移位没有关联（分别为 r = 0.03 p = 0.83；r = 0.05 p = 0.74）。

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来源期刊

Knee 医学-外科

CiteScore

3.80

自引率

5.30%

发文量

171

审稿时长

6 months

期刊介绍： The Knee is an international journal publishing studies on the clinical treatment and fundamental biomechanical characteristics of this joint. The aim of the journal is to provide a vehicle relevant to surgeons, biomedical engineers, imaging specialists, materials scientists, rehabilitation personnel and all those with an interest in the knee. The topics covered include, but are not limited to: • Anatomy, physiology, morphology and biochemistry; • Biomechanical studies; • Advances in the development of prosthetic, orthotic and augmentation devices; • Imaging and diagnostic techniques; • Pathology; • Trauma; • Surgery; • Rehabilitation.