title: Optimizing baseplate position in reverse total shoulder arthroplasty in small-sized Japanese females: technical notes and literature review.
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.
authors.affiliation: Department of Orthopedics, Tokushima University.
authors.forename: Subash C
authors.initials: SC
authors.lastname: Jha
authors.forename: Shoji
authors.initials: S
authors.lastname: Fukuta
authors.forename: Keizo
authors.initials: K
authors.lastname: Wada
authors.forename: Kosaku
authors.initials: K
authors.lastname: Higasino
authors.forename: Rui
authors.initials: R
authors.lastname: Amari-Kita
authors.forename: Takahiko
authors.initials: T
authors.lastname: Tsutsui
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Goto
authors.forename: Daisuke
authors.initials: D
authors.lastname: Hamada
authors.forename: Naoto
authors.initials: N
authors.lastname: Suzue
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Matsuura
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Nishisho
authors.forename: Mitsunobu
authors.initials: M
authors.lastname: Abe
authors.forename: Yoichiro
authors.initials: Y
authors.lastname: Takata
authors.forename: Toshinori
authors.initials: T
authors.lastname: Sakai
authors.forename: Akihiro
authors.initials: A
authors.lastname: Nagamachi
authors.forename: Koichi
authors.initials: K
authors.lastname: Sairyo
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000072228:Arthroplasty, Replacement, Shoulder / Q000295:instrumentation* / Q000379:methods*; D044466:Asian People; D049628:Body Size; D005260:Female; D006801:Humans; D011474:Prosthesis Design; D000070636:Rotator Cuff Injuries / Q000000981:diagnostic imaging / Q000601:surgery; D000070656:Rotator Cuff Tear Arthropathy / Q000000981:diagnostic imaging / Q000601:surgery; D000072227:Shoulder Prosthesis; D014057:Tomography, X-Ray Computed