Abstract
Aims: The purpose of this study is to compare the radiographic results of two glenoid preparation techniques by analyzing periglenoid radiolucencies. Methods: Seventy-two shoulder arthroplasties with primary osteoarthritis were divided into two groups based on glenoid preparation technique: thirtyseven shoulders with “curettage” of the keel slot, and thirty-five shoulders with cancellous bone compaction. The radiolucent lines were analyzed on fluoroscopically positioned, postoperative AP radiographs. The RLL Score (RLLS) was calculated using the technique of Molé. The RLLS was compared between the two groups. Results: On the immediate postoperative radiographs the average of the total RLL score was 2.39 in Group 1 and 1.67 in Group 2 (p=0.042). There was a statistically significant association between the glenoid preparation technique and the incidence of radiolucency around the keel as well (p=0.001). On the 2-year postoperative radiographs the average RLL score was 6.44 in the Group1, and 4.19 in Group 2 (p=0.0005). The radiolucency around the keel and behind the face-plate (p=0.0005) was significantly greater (p=0.001) in the “curettage” glenoid preparation population. A significantly higher degree of progression of the total RLL score (p=0.002) and of the radiolucency behind the face-plate (p=0.001) was observed in the “curettage” glenoid preparation group. Conclusions: Preparation of the keel slot with cancellous bone compaction is radiographically superior to the “curettage” technique.
Theses abstracts were prepared by Professor Dr. Frantz Langlais. Correspondence should be addressed to him at EFORT Central Office, Freihofstrasse 22, CH-8700 Küsnacht, Switzerland.
