Clinical and radiographic analysis of a partially cemented glenoid implant: Five-year minimum follow-up

Hypothesis: This study reviewed 20 consecutive shoulders that underwent total shoulder arthroplasty with a partially cemented glenoid component at a minimum follow-up of 5 years. We hypothesized that bone growth between the fins of the component would result in improved glenoid fixation and reduced lucent line formation. Methods: Patients were evaluated with the Simple Shoulder Test (SST), Constant scores, and radiographs. Postoperative radiographs taken at 6 weeks and 5 years were compared Independent evaluators assigned every glenoid a lucency grade from 0 (no lucency) to 5 (gross lucency) and assessed the central peg for bone presence between the fins Results: Mean SST and Constant scores were 11.1 and 82.4, respectively Mean lucency scores increased from 0.1 to 0.3 from 6 weeks to the 5-year follow-up (P = 05). At the 5-year follow-up, 15 of 20 patients had similar or increased bone presence between the central peg fins. and none had a worsening lucency score The 5 patients with decreased or absent bone presence had worsening lucency scores, from a mean of 0.2 to 1 0 (P = 05). There was no difference in SST score (P = .54) or Constant score (P = 37) between the two groups Conclusions: This partially cemented glenoid component had low rates of lucency at the 5-year follow-up Similar or increased bone growth between the fins of the central peg was associated with no progression of glenoid lucencies Decreased or absent bone presence between the fins at follow-up correlated with slight advancement of glenoid lucent lines. Level of Evidence: Level IV. Case Series. Treatment Study. (C) 2010 Journal of Shoulder and Elbow Surgery Board of Trustees.