A radiographic analysis of the effects of prosthesis design on scapular notching following reverse total shoulder arthroplasty

详细信息    查看全文

• 作者：Laurence B. Kempton MD^a ; Mamtha Balasubramaniam MS^a ; Elizabeth Ankerson BS^a ; J. Michael Wiater MD ; ^a ; ^{jmwiater@aol.com"" rel=""nofollow}
• 关键词：Reverse shoulder arthroplasty ; scapular notching ; prosthesis design ; neck-shaft angle
• 刊名：Journal of Shoulder and Elbow Surgery
• 出版年：2011
• 出版时间：June 2011
• 年：2011
• 卷：20
• 期：4
• 页码：571-576
• 全文大小：192 K

文摘

Background

Scapular notching is a well-recognized complication of reverse total shoulder arthroplasty (RTSA). This paper analyzes the effects of prosthesis design on scapular notching in RTSA.

Methods

From a database of all RTSA performed by the senior author, shoulders with minimum 12-month follow-up were included (65 shoulders). Notching in shoulders with a prosthesis neck-shaft angle of 155° and no center-of-rotation (COR) offset (group 1) was compared to notching in shoulders with a neck-shaft angle of 143° and 2.5-mm COR offset (group 2). P values less than .05 were considered significant.

Results

The notching grade was significantly higher in group 1 than in group 2, even after statistically adjusting for differences in length of follow-up (P = .0081). The incidence of notching in group 1 at 60.7 % was significantly higher than the 16.2 % incidence in group 2 (P = .0107).

Conclusion

Using prostheses with a smaller neck-shaft angle and increased COR offset can significantly reduce scapular notching in RTSA at 1 year, possibly improving prosthesis survival.