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Traumatic Posterior Rotator Cuff Tear in the Pre-existing Chronic Supraspinatus Tendon Tear
Korean J Sports Med 2019;37:140-148
Published online December 1, 2019;  https://doi.org/10.5763/kjsm.2019.37.4.140
© 2019 The Korean Society of Sports Medicine.

Jung Hoei Ku, Hyung Lae Cho, Jong Min Kim

Department of Orthopaedic Surgery, Good Samsun Hospital, Busan, Korea
Correspondence to: Hyung Lae Cho
Department of Orthopaedic Surgery, Good Samsun Hospital, 326 Gaya-daero, Sasang-gu, Busan 47007, Korea
Tel: +82-51-322-0900, Fax: +82-51-310-9348, E-mail: hljo88@hanmail.net
Received September 16, 2019; Revised October 9, 2019; Accepted November 5, 2019.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
Purpose: This study aimed to evaluate the diagnostic characteristics and clinical results after surgical repair of traumatic superimposed posterior rotator cuff tear in the setting of preexisting retracted supraspinatus tendon tear.
Methods: A total of 20 patients (mean age, 62.1 years) were included and all patients had significant traumatic events mean 3.7 weeks prior to the surgery. Preoperative acromiohumeral distance (AHD, mean 3.2 mm) and arthritis change were analyzed on plain radiograph and magnetic resonance imaging was evaluated for the nature and extent of torn tendon, and fatty degeneration (FD) of all cuff muscles to validate if the tears were traumatic or chronic.
Results: Complete repairs were achieved in 15 patients and partial repair including posterior cuff in five. Functional and radiographic results were statistically evaluated and repair integrities were assessed with ultrasound at average 17.3 months. Overall functional outcome scores were significantly improved and 17 patients (85%) were satisfied with their symptoms. AHD was significantly recovered (mean, 6.7 mm), but two patients showed progression of arthritic change. Retears after the complete repair were three patients (20%), who showed poor outcome, with advanced preoperative FD of posterior cuff muscles. Five patients with partial repair of posterior cuff revealed improved functional score with no sign of retear of posterior cuff on ultrasound.
Conclusion: Early recognition of traumatic superimposed posterior cuff tears and surgical repair can reliably restore shoulder function, and partial repair of posterior cuff also can be expected favorable outcomes in supraspinatus tear with advanced FD.
Keywords : Fatty degeneration, Partial repair, Rotator cuff tear, Traumatic, Ultrasound
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