Towards a better understanding of knee angular deformities: discrepancies between clinical examination and 2D/3D assessments

被引:0
|
作者
Ghanem, Diane [1 ,2 ]
Ghoul, Ali [1 ,3 ]
Assi, Ayman [1 ]
Ghanem, Ismat [1 ,3 ]
机构
[1] St Joseph Univ Beirut, Fac Med, Lab Biomech & Med Imaging, Beirut, Lebanon
[2] Johns Hopkins Univ Hosp, Dept Orthopaed Surg, Baltimore, MD 21287 USA
[3] St Joseph Univ Beirut, Hotel Dieu France Hosp, Beirut, Lebanon
关键词
Knee angular deformities; HKA angle; Coronal knee alignment; 3D imaging; Radiographs; LOWER-LIMB ALIGNMENT; LOWER-EXTREMITY; AXIAL ALIGNMENT; RELIABILITY; FEMUR; OSTEOARTHRITIS; PROGRESSION; ROTATION; VALUES; SYSTEM;
D O I
10.1007/s00402-023-05153-w
中图分类号
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学(修复外科学)];
学科分类号
摘要
IntroductionDiscrepancy between the clinical examination and the 2D/3D radiographs is a common concern in patients with angular or rotational deformities of the lower limbs, as it may alter clinical judgment and subsequent treatment. The aim was to identify such discrepancies and assess determinants that may contribute to their existence.Materials and methodsA retrospective chart review was conducted on 329 consecutive patients (658 lower limbs) who underwent physical examination and long-leg biplanar radiographs in our institution between 2013 and 2018 for limb length discrepancy or angular deformity of the knees (varus/valgus). Eleven parameters were measured on 2D and 3D images. 3D measurements were based on standing biplanar X-rays and their 3D reconstructions and were considered the gold standard. Contingency tables and multiple linear regression were used to assess discrepancies between the three modalities and their determinants respectively.ResultsSignificant mismatches were found between physical examination and 2D images (1% in varus and 1% in valgus), between physical examination and 3D assessment (1% in varus and 4.6% in valgus) as well as between 2 and 3D assessments (1.9% in varus and 7.6% in valgus). The significant determinants of the mismatch between 2 and 3D modalities were frontal pelvic obliquity, neck shaft angle, knee flexion, femoral torsion, and tibial mechanical angle.ConclusionIn the presence of positional and/or morphological deformities, physical examination and 2D assessment of knee alignment could be biased due to axes projection errors. A better understanding of 3D alignment of the knee as part of the entire lower limb from pelvis to toes, may lead to a better diagnosis and subsequently a better treatment of knee angular deformities.
引用
收藏
页码:1005 / 1011
页数:7
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