These authors note that uncemented metal-backed glenoid components were introduced in an attempt to avoid glenoid loosening. They used the New Zealand Joint Registry data from January 2000 to December 2017 to compare all-cause revision rates and functional scores for TSA.
A total of 2613 TSAs were performed for OA during the study period, representing 85.0% of all TSAs in New Zealand.
69.6% of glenoids were cemented and 30.4% uncemented.
The most common uncemented metal backed glenoid was SMR 86.6% (LimaCorporate).
The most common cemented glenoid was Global (DePuy) 49.8%.
The revision rate for TSA with uncemented glenoids was significantly higher at 2.03 compared with cemented at 0.41 per 100 component-years (P < .001).
The hazard ratio was 5.0 for revision of uncemented glenoids.
The most common mode of failure was glenoid loosening in cemented glenoids (44.4%), and component failure in uncemented (34.8%).
When excluding SMR L2, uncemented MB glenoid all-cause revision rates remained significantly higher than cemented (1.42 vs. 0.41 per 100 component-years, P < .001).
SMR L1 uncemented MB glenoids had a higher revision rate than the non-SMR uncemented glenoids (1.61 vs. 0.18 per 100 component-years, P . .009).
Uncemented glenoid use peaked in New Zealand in 2011 at 46.7% of TSAs but declined to 20.1% in 2017.
Cemented fixation of an all-poly glenoid component with a fluted central peg has shown great clinical utility in a large international study (see this link).
Here's a related article Clinical and radiographic outcomes of an all-polyethylene fluted central peg glenoid component, implanted utilizing an off-label, uncemented technique, at a minimum 5-year
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The revision rate for TSA with uncemented glenoids was significantly higher at 2.03 compared with cemented at 0.41 per 100 component-years (P < .001).
The hazard ratio was 5.0 for revision of uncemented glenoids.
The most common mode of failure was glenoid loosening in cemented glenoids (44.4%), and component failure in uncemented (34.8%).
When excluding SMR L2, uncemented MB glenoid all-cause revision rates remained significantly higher than cemented (1.42 vs. 0.41 per 100 component-years, P < .001).
Uncemented glenoid use peaked in New Zealand in 2011 at 46.7% of TSAs but declined to 20.1% in 2017.
Comment: It is difficult to understand the passion for "cementless" glenoid fixation when the 10 year revision rate for cemented cross-linked glenoid components reported by the Australian Orthopaedic Association is 3% (see below)
Cemented fixation of an all-poly glenoid component with a fluted central peg has shown great clinical utility in a large international study (see this link).
Here's a related article Clinical and radiographic outcomes of an all-polyethylene fluted central peg glenoid component, implanted utilizing an off-label, uncemented technique, at a minimum 5-year
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