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2. Early Changes in Postural Balance Following Inverted V-Shaped High Tibial Osteotomy in Patients With Knee Osteoarthritis.

Author

Sabashi, Kento, Chiba, Takeshi, Iwasaki, Koji, Onodera, Tomohiro, Kondo, Eiji, Iwasaki, Norimasa, and Tohyama, Harukazu

Subjects
TIBIA surgery, KNEE osteoarthritis, KNEE joint, POSTURAL balance, OSTEOTOMY, PREOPERATIVE period, SURGERY, PATIENTS, TREATMENT effectiveness, ONE-leg resting position, POSTOPERATIVE period, BIOMECHANICS
Abstract

Patients with knee osteoarthritis and varus knee deformity have impaired postural balance, resulting in decreased walking performance and an increased risk of falls. This study aimed to investigate the early changes in the postural balance following inverted V-shaped high tibial osteotomy (HTO). Fifteen patients with medial knee osteoarthritis were recruited. Postural balance was assessed using the center-of-pressure (COP) data during single-leg standing before and 6 weeks after inverted V-shaped HTO. The maximum range, mean velocity, and area of COP movements in the anteroposterior and mediolateral directions were analyzed. Preoperative and postoperative visual analog scale for knee pain was assessed. The maximum range of COP in the mediolateral direction decreased (P =.017), whereas the mean velocity of COP in the anteroposterior direction increased 6 weeks postoperatively (P =.011). The visual analog scale score for knee pain significantly improved at 6 weeks postoperatively (P =.006). Valgus correction with inverted V-shaped HTO resulted in improved postural balance in the mediolateral direction and good short-term clinical outcomes early following surgery. Early rehabilitation after inverted V-shaped HTO should focus on postural balance in the anteroposterior direction. [ABSTRACT FROM AUTHOR]

Published
2023
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5. Changes in postural control strategy during quiet standing in individuals with knee osteoarthritis

Author

Sabashi, Kento, 1000010312422, Kasahara, Satoshi, 1000060301884, Tohyama, Harukazu, Chiba, Takeshi, 1000090748120, Koshino, Yuta, Ishida, Tomoya, 1000040360953, Samukawa, Mina, 1000040166757, Yamanaka, Masanori, Sabashi, Kento, 1000010312422, Kasahara, Satoshi, 1000060301884, Tohyama, Harukazu, Chiba, Takeshi, 1000090748120, Koshino, Yuta, Ishida, Tomoya, 1000040360953, Samukawa, Mina, 1000040166757, and Yamanaka, Masanori

Abstract

BACKGROUND: Knee osteoarthritis (OA) impairs postural control and may affect how the lower limb joints are used for postural control. OBJECTIVE: To investigate how individuals with knee OA use lower limb joints for static postural control. METHODS: Ten patients with knee OA and thirteen healthy controls performed quiet standing for 30 s. The standard deviation of the center of mass (COM) and lower limb joint motions in the anterior-posterior (AP) and medial-lateral (ML) planes were calculated from three-dimensional marker trajectories. Pearson's correlation analysis and independent t-tests were conducted to investigate the relationship between COM and lower limb joint motion and to compare group difference, respectively. RESULTS: The AP hip angular velocity alone in the knee OA group and the AP hip and knee angular velocity in the control group were significantly correlated with the AP COM velocity. The ML hip angular velocity was significantly correlated with the ML COM velocity in both groups. The knee OA group exhibited a significantly larger standard deviation of AP COM velocity than the control group. CONCLUSIONS: Individuals with knee OA depended solely on the contribution of the hip to the AP COM velocity, which could not be successfully controlled by the knee.

Published
2022

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