Variations in patellar position according to knee joint morphotype in patients with osteoarthritis
Year: 2025
Type: article
Study design: Observational Study
Abstract: Background. Patellar position relative to knee joint morphotype is clinically relevant. The purpose was to characterize patellar position features in patients with knee osteoarthritis, considering morphological joint variants. Materials and methods. Radiographs of 100 patients (mean age 63.56 ± 8.10 years) with medial knee osteoarthritis were analyzed. Morphotype I was identified in 21.0 %, morphotype II in 38.0 %, morphotype III in 29.0 %, morphotype IV in 12.0 % of cases. Patellar position was assessed using Insall-Salvati, Caton-Deschamps, Grelsamer-Meadows, Blackburne-Peel indices. Statistical significance was set at p ≤ 0.05. Results. Mean Insall-Salvati index was 1.11 ± 0.05 in morphotype I, 1.29 ± 0.38 in morphotype II, 1.32 ± 0.25 in morphotype III, 1.40 ± 0.14 in morphotype IV (p = 0.009). Caton-Deschamps index was 0.77 ± 0.14 in morphotype I, 0.74 ± 0.23 in morphotype II, 0.78 ± 0.24 in morphotype III, and 1.05 ± 0.16 in morphotype IV (p = 0.02). Mean Grelsamer-Meadows index was 1.84 ± 0.12 in morphotype I, 1.86 ± 0.46 in morphotype II, 1.86 ± 0.44 in morphotype III, and 2.41 ± 0.33 in morphotype IV (p = 0.009). Blackburne-Peel ratio was 0.64 ± 0.09 in morphotype I, 0.59 ± 0.23 in morphotype II, 0.74 ± 0.24 in morphotype III, and 0.98 ± 0.14 in morphotype IV (p = 0.001). Blackburne-Peel index < 0.8 was associated with a higher likelihood of morphotype II (OR = 9.8; 95% CI: 1.9–49.2; p = 0.0007). Increased odds of morphotype III were associated with Insall-Salvati index > 1.2 (OR = 4.7; 95% CI: 1.4–16.0; p = 0.007), Blackburne-Peel 0.8–1.0 (Odd Ratio (OR) = 4.4; 95% CI: 1.2–17.0; p = 0.03). Caton-Deschamps > 1.2 and Blackburne-Peel > 1.0 were associated with greater odds of morphotype IV (OR = 21.6; 95% CI: 1.6–297.4; p = 0.02, and OR = 23.1; 95% CI: 3.3–160.1; p = 0.001, — respectively). Conclusion. Therefore, in morphotypes I and II, patellar position alterations were primarily associated with pathological changes in the proximal tibia, whereas in morphotypes III and IV, they were predominantly linked to patellofemoral joint involvement.
Source: PAIN JOINTS SPINE
Authors: L.O. Kylymniuk, M.M. Matsipura, S.Iu. Iaremyn
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4412372779