ArticleIn vivo (Athens, Greece)
A Retrospective Comparative Study of Ultrasound-guided Extramedullary Kinematic Alignmentin Total Knee Replacement.
Article in In vivo (Athens, Greece). 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/
aimAccurate hip-knee-ankle (HKA) alignment plays a crucial role in the success of total knee replacement (TKR). Kinematic alignment (KA) aims to restore the patient's natural joint anatomy to improve postoperative function and satisfaction. Ultrasound, a noninvasive and real-time imaging technique, can identify the center of the femoral head (COFH) and enhance surgical alignment accuracy. This study aimed to evaluate whether ultrasound-guided COFH identification improves postoperative HKA alignment accuracy in KA-based TKR. PATIENTS AND
methodsA retrospective analysis of 217 patients who underwent primary TKR at Show Chwan Memorial Hospital (2020-2022) was performed. Patients were divided into a calipered group (without ultrasound) and an ultrasound-guided group. Postoperative alignment and HKA angles were compared between the groups using radiographic measurements and statistical analysis.
resultsThe ultrasound-guided group demonstrated significantly improved alignment, with 91.6% of patients achieving postoperative HKA within the safe range (-4° valgus to +5° varus) compared to 81.1% in the calipered group (
conclusionUltrasound-guided COFH identification significantly enhances the accuracy of KA-based TKR, particularly in neutral-type osteoarthritis knees. This noninvasive and real-time approach serves as a valuable adjunct for improving alignment precision and clinical outcomes.
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