ArticleZhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery2026
[Impact of coronal plane alignment of knee phenotype alteration on short-term effectiveness in robot-assisted total knee arthroplasty].
Article in Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery, 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
Objective: To investigate effect of coronal plane alignment of the knee (CPAK) phenotype alteration on patient-reported outcome measures (PROMs) and functional outcomes in patients undergoing robot-assisted total knee arthroplasty (RA-TKA). Methods: The clinical data of 108 patients who underwent unilateral RA-TKA between December 2024 and June 2025 and met the inclusion criteria were retrospectively analyzed. The cohort included 34 males and 74 females, with an average age of 68.8 years (range, 54-83 years). General data including age, gender, body mass index (BMI), and operative side were collected. PROMs included the Western Ontario and McMaster University Osteoarthritis Index (WOMAC), Knee Society Score (KSS), and Forgotten Joint Score-12 (FJS-12). Functional outcomes included range of motion (ROM) and angle of knee extension lag. Based on full-length lower extremity X-ray films, the mechanical lateral distal femoral angle (mLDFA) and mechanical medial proximal tibial angle (mMPTA) were measured, and the arithmetic hip-knee-ankle angle (aHKA) and joint line obliquity (JLO) were calculated. The CPAK phenotype was determined according to the classification proposed by MacDessi Results: Among the 108 patients, the CPAK phenotype remained unchanged in 70 cases (64.8%, CPAK consistent group) and changed in 38 cases (35.2%, CPAK changed group). There was no significant difference between the two groups in age, gender, BMI, operative side, or preoperative WOMAC score, KSS score, ROM, and aHKA ( Conclusion: Preservation of the preoperative CPAK phenotype after RA-TKA is associated with superior improvement in PROMs at short-term stage.
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