Yasuyuki Ueda1, Hiroshi Tanaka2, Shigetoshi Morioka3, Takashi Tachibana4, Toyohiko Hayashi5, Noriaki Ichihashi6, Hiroaki Inui2, Katsuya Nobuhara2. 1. Department of Rehabilitation, Nobuhara Hospital, 720 Haze, Issai-cho, Tatsuno-city, Hyogo, Japan; Human Health Sciences, Graduate School of Medicine, Kyoto University, 53, Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, Japan. Electronic address: yasuyuki-ueda@hotmail.co.jp. 2. Institute of Biomechanics, Nobuhara Hospital, 720 Haze, Issai-cho, Tatsuno-city, Hyogo, Japan. 3. Department of Radiology, Nobuhara Hospital, 720 Haze, Issai-cho, Tatsuno-city, Hyogo, Japan. 4. Department of Rehabilitation, Nobuhara Hospital, 720 Haze, Issai-cho, Tatsuno-city, Hyogo, Japan. 5. Department of Biocybernetics, Faculty of Engineering, Niigata University, 8050, Ninomachi, Igarashi, Nishi-ku, Niigata-city, Niigata, Japan. Electronic address: hayashi@eng.niigata-u.ac.jp. 6. Human Health Sciences, Graduate School of Medicine, Kyoto University, 53, Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, Japan. Electronic address: ichihashi.noriaki.5z@kyoto-u.ac.jp.
Abstract
BACKGROUND: Function loss caused by rotator cuff tears alters the scapular orientation, however, few prior studies have reported on scapular movements after rotator cuff repair. The purpose was to determine the scapular orientations before and after rotator cuff repair. METHODS: We recruited 14 healthy controls, 10 small and six massive rotator cuff tear in patients. The scapular upward rotation during arm elevation was analyzed using fluoroscopic imaging. FINDINGS: Before surgery, both rotator cuff groups demonstrated greater scapular upward rotation compared to healthy controls. Two months postoperation, the analyses showed significant differences between the patients with small rotator cuff tears and healthy controls at arm elevations of 90°, and between patients with both rotator cuff tear groups and healthy controls at arm elevations of 120°. At five months post-operation, significant differences still existed between the healthy controls and both rotator cuff groups. In regard to the temporal effects in the patients with small rotator cuff tears, the scapular upward rotation decreased significantly over time (2-5 months postoperation) at arm elevations of 120°. We did not identify a main effect owing to time in the patients with massive rotator cuff tears. INTERPRETATION: In patients with small rotator cuff tears, scapular upward rotation was reduced over the period of 2-5 months postoperation, however, the patients with massive rotator cuff tears showed greater scapular upward rotation throughout the experimental period. The results suggested that the execution of the rehabilitation program should consider that the tear size could affect scapular motion.
BACKGROUND: Function loss caused by rotator cuff tears alters the scapular orientation, however, few prior studies have reported on scapular movements after rotator cuff repair. The purpose was to determine the scapular orientations before and after rotator cuff repair. METHODS: We recruited 14 healthy controls, 10 small and six massive rotator cuff tear in patients. The scapular upward rotation during arm elevation was analyzed using fluoroscopic imaging. FINDINGS: Before surgery, both rotator cuff groups demonstrated greater scapular upward rotation compared to healthy controls. Two months postoperation, the analyses showed significant differences between the patients with small rotator cuff tears and healthy controls at arm elevations of 90°, and between patients with both rotator cuff tear groups and healthy controls at arm elevations of 120°. At five months post-operation, significant differences still existed between the healthy controls and both rotator cuff groups. In regard to the temporal effects in the patients with small rotator cuff tears, the scapular upward rotation decreased significantly over time (2-5 months postoperation) at arm elevations of 120°. We did not identify a main effect owing to time in the patients with massive rotator cuff tears. INTERPRETATION: In patients with small rotator cuff tears, scapular upward rotation was reduced over the period of 2-5 months postoperation, however, the patients with massive rotator cuff tears showed greater scapular upward rotation throughout the experimental period. The results suggested that the execution of the rehabilitation program should consider that the tear size could affect scapular motion.
Authors: Hema J Sulkar; Tyler W Knighton; Linda Amoafo; Klevis Aliaj; Christopher W Kolz; Yue Zhang; Tucker Hermans; Heath B Henninger Journal: J Biomech Eng Date: 2022-05-01 Impact factor: 2.097
Authors: Nicole G Lemaster; Carolyn M Hettrich; Cale A Jacobs; Nick Heebner; Philip M Westgate; Scott Mair; Justin R Montgomery; Tim L Uhl Journal: Clin Orthop Relat Res Date: 2021-09-01 Impact factor: 4.755