The Journal of Medical Investigation
Online ISSN : 1349-6867
Print ISSN : 1343-1420
ISSN-L : 1343-1420
Reviews
Optimizing baseplate position in reverse total shoulder arthroplasty in small-sized Japanese females: technical notes and literature review
Subash C. Jha, Shoji Fukuta, Keizo Wada, Kosaku Higasino, Rui Amari-Kita, Takahiko Tsutsui, Tomohiro Goto, Daisuke Hamada, Naoto Suzue, Tetsuya Matsuura, Toshihiko Nishisho, Mitsunobu Abe, Yoichiro Takata, Toshinori Sakai, Akihiro Nagamachi, Koichi Sairyo
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Keywords: Reverse total shoulder arthroplasty, Glenoid morphology, Short stature, Japanese female
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2016 Volume 63 Issue 1.2 Pages 8-14

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Abstract

The management of cuff tear arthropathy (CTA) has always been a challenge for shoulder surgeons. Introduction of reverse total shoulder arthroplasty (RTSA) helped in providing pain relief and improved shoulder function in patients with CTA. In this study, we aimed to evaluate the short-term clinical results and some clinical details regarding the types of available prosthesis, positioning, and size of the components for RTSA in a population of short-stature female Japanese. In our seven cases, the average glenoid size was 23.9 mm in width and 34.2 mm in height. The average width was smaller than the size of all available baseplates. We implanted reverse shoulder prostheses with baseplate that measured 28 mm in diameter and two locking screws. The center of the baseplate was shifted to allow slight anterior overhang relative to the anatomical center to avoid breakage of the posterior cortex and to achieve firm fixation. One case of humeral shaft fracture occurred while inserting the humeral stem and required encircling wiring. In our experience, the short term clinical results of RTSA were excellent, but a new prosthesis that is designed to fit the short stature of Asians with smaller glenoid and humerus should be considered. J. Med. Invest. 63: 8-14, February, 2016

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© 2016 by The University of Tokushima Faculty of Medicine
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