Keywords
gonarthrosis
knee arthroplasty
osteoarthritis
morphology
How to Cite
Abstract
Introduction. Gonarthrosis is one of the most pressing medical and social issues in modern society.
Aim. To characterize morphometric differences in the distal femur in knee osteoarthritis, depending on the morphotype determined using a proprietary clustering system.
Materials and methods. One hundred knee joint X-rays from 70 patients with medial compartment osteoarthritis were analyzed (26 (37.14%) men and 44 (62.86%) women). The mean age was 63.56±8.10 years. Morphotype I was identified in 21 patients (21.00%), morphotype II in 38 (38.00%), morphotype III in 29 (29.00%), and morphotype IV in 12 (12.00%). Morphometric parameters of the distal femur were measured relative to the axis drawn from the center of the intercondylar notch to the femoral condyles: lateral femoral condyle angle (LFCA), lateral mid-condylar femoral angle (LFMA), medial mid-condylar femoral angle (MFMA), and medial femoral condyle angle (MFCA). These angles were also assessed relative to the tangent axis to the femoral condyles: LFCA2, LFMA2, MFMA2, and MFCA2. Statistical analysis was performed using Statistica 13, with significance set at p ≤0.05.
Results. The mean LFCA in patients with morphotype I was 94.71±3.94°, II – 89.17±4.78°, III – 91.48±4.79°, and IV – 90.25±4.05° (p=0.001). LFMA values were 82.26±5.11° in morphotype I, 81.08±2.65° in II, 84.12±3.41° in III, and 86.50±5.33° in IV (p=0.0004). The mean MFMA was 74.67±4.63° (morphotype I), 75.43±6.14° (morphotype II), 72.84±3.17° (morphotype III), and 70.92±3.00° (morphotype IV) (p=0.01). MFCA values in patients with morphotype I were 87.90±4.50°, II – 86.01±5.26°, III – 87.69±3.52° and IV – 89.96±4.15° (p=0.04). LFCA2 was 107.62±4.39° in morphotype I, 102.17±6.21° in II, 105.36±6.54° in III, and 103.92±5.12° in IV (p=0.006). LFMA2 values in patients with morphotype I were 95.55±4.05°, II – 95.08±2.45°, III – 96.84±2.68° and IV – 97.79±3.01° (p=0.03). MFMA2 values were 85.36±4.70° (morphotype I), 85.71±4.57° (morphotype II), 83.19±2.67° (morphotype III), and 82.08±2.87° (morphotype IV) (p=0.007). The mean MFCA2 in individuals with morphotype I was 99.52±4.64°, II – 97.00±5.20°, III – 98.74±4.39° and IV – 101.88±4.16° (p=0.02).
Conclusions. Significant differences in the morphometric parameters of the distal femur depending on the knee joint morphotype were demonstrated.
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