ArticleOrthopaedic journal of sports medicine2026
The Coronal Plane Alignment of the Knee Classification in Patients With Medial Meniscal Posterior Root Tears.
Article in Orthopaedic journal of sports medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: The medial meniscus posterior root tear (MMPRT) is a contributing factor to osteoarthritis (OA). The Coronal Plane Alignment of the Knee (CPAK) classification is a method for characterizing knee alignment phenotypes by incorporating the arithmetic hip-knee-ankle (aHKA) and the joint line obliquity (JLO). Purpose: To evaluate the CPAK type in patients with MMPRT while comparing the radiographic parameters between the MMPRT knees and the unaffected knees. Study Design: Cross-sectional study; Level of evidence, 3. Methods: A total of 74 patients with MMPRT, including 87 knees, were confirmed using magnetic resonance imaging. Radiographic parameters of long-leg radiographs were measured separately by 2 reviewers at 2 different time points to classify the CPAK phenotypes, where the neutral aHKA was determined by 0°± 2° and neutral JLO by 180°± 3°. Results: Patients with MMPRT were predominantly women (72.97%), with a mean age of 55.1 ± 9.3 years and a body mass index of 27.7 kg/m Conclusion: Among patients with MMPRT, the most common CPAK phenotypes are types 2, 1, and 4, respectively. Most patients had an apex-distal JLO and varus-to-neutral alignment. These findings suggest that apex distal JLO may be a contributing factor for the development of MMPRT.
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