Original articleA study of the micromovement of pegged and keeled glenoid components compared using radiostereometric analysis
Section snippets
Materials and methods
In a prospective, randomized study between 2000 and 2004, 20 patients with primary osteoarthritis had a total shoulder arthroplasty with roentgen stereophotogrammetric analysis. Full ethical committee approval and patient informed consent were obtained. To enter the study, patients had to have good glenoid bone stock, sufficient to introduce a glenoid component, and an intact and functioning rotator cuff. Two patients died before the end of the study, another had unstable marker-bead placement,
Results
The clinical outcome for all patients is shown in Table I at 2 years postoperatively, with pain scores, range of movement, Constant-Murley scores, and self-assessed American Shoulder and Elbow Surgeons scores all improving significantly (P < .001, paired t test) for both keeled and pegged groups of patients.
The results of translations of the glenoid rigid body are presented in Table II. Two of the three axes of translation showed significant translation over time, with the third, the sagittal
Discussion
As stated previously, aseptic loosening of the glenoid component is a common complication of total shoulder arthroplasty. In the 1970s, several designs of constrained implants had a high rate of glenoid loosening.11 In contrast, Neer9 reported a 10-year follow-up of 46 unconstrained total shoulder arthroplasties and reported no evidence of clinical loosening. As a consequence, this type of glenoid forms the basis of most modern designs. However, although the incidence of glenoid revision
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Improved mechanical fixation of an all-polyethylene glenoid reduces postoperative radiolucent lines
2022, Journal of Shoulder and Elbow SurgeryBony increased-offset reverse shoulder arthroplasty vs. metal augments in reverse shoulder arthroplasty: a prospective, randomized clinical trial with 2-year follow-up
2022, Journal of Shoulder and Elbow SurgeryCitation Excerpt :A handful of studies have investigated glenoid component migration in anatomic shoulder arthroplasty, with variable results. Unfortunately, the anatomic results are not transferable to the reverse shoulder glenoid component, as the reverse shoulder experiences different biomechanics and loading conditions.9,19,20,23,25,29 Therefore, the purpose of this study was to compare implant migration in the first 2 years postoperatively between BIO-RSA and porous metal wedge augmentation techniques using model-based radiostereometric analysis.