title: Effect of rotator interval closure on glenohumeral stability and motion: a cadaveric study.
abstract: The effect of rotator interval closure, which is performed as an adjunct to arthroscopic stabilization of the shoulder, has not been clarified. Fourteen fresh-frozen cadaveric shoulders were used. The position of the humeral head was measured using an electromagnetic tracking device with the capsule intact, sectioned, and imbricated between the superior glenohumeral ligament and the subscapularis tendon (SGHL/SSC closure) or between the superior and middle glenohumeral ligaments (SGHL/MGHL closure). The direction of translational loads (10, 20, and 30 N) and arm positions were (1) anterior, posterior, and inferior loads in adduction; (2) anterior load in abduction/external rotation in the scapular plane; and (3) anterior load in abduction/external rotation in the coronal plane. The range of motion was measured using a goniometer under a constant force. Both methods reduced anterior translation in adduction. Only SGHL/MGHL closure reduced anterior translation in abduction/external rotation in the scapular plane and posterior translation in adduction. Both methods reduced the range of external rotation and horizontal abduction. Rotator interval closure is expected to reduce remnant anterior/posterior instability and thereby improve the clinical outcomes of arthroscopic stabilization procedures.
authors.affiliation: Division of Orthopedic Surgery, Department of Neuro and Locomotor Science, Akita University School of Medicine, Akita, Japan.
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Yamamoto
authors.forename: Eiji
authors.initials: E
authors.lastname: Itoi
authors.forename: Yilihamu
authors.initials: Y
authors.lastname: Tuoheti
authors.forename: Nobutoshi
authors.initials: N
authors.lastname: Seki
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Abe
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Minagawa
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Shimada
authors.forename: Kyoji
authors.initials: K
authors.lastname: Okada
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001182:Arthroscopy; D001696:Biomechanical Phenomena; D002102:Cadaver; D006801:Humans; D007593:Joint Instability; D008875:Middle Aged; D019637:Orthopedic Procedures; D016059:Range of Motion, Articular; D017006:Rotator Cuff / Q000601:surgery*; D000070636:Rotator Cuff Injuries; D012785:Shoulder Joint