Survival and radiographic analysis of a glenoid component with a cementless fluted central peg.

BACKGROUND Aseptic loosening of glenoid components is a common problem associated with total shoulder arthroplasty and one cause for failure. A new cementless fluted glenoid component was developed and has shown excellent bony ingrowth in a canine model. HYPOTHESIS Clinical utilization of this cementless fluted pegged glenoid component in total shoulder arthroplasty would lower rates of radiolucent lines and aseptic loosening. MATERIALS AND METHODS Between January 2005 and December 2007, 83 primary shoulder arthroplasties with a minimum of 2 years' follow-up were performed with the uncemented fluted pegged glenoid component. Radiographs and records were reviewed to determine stability and survival of the glenoid component. RESULTS All cementless fluted pegged glenoid components had survived at the most recent clinical follow-up. Radiographs showed no evidence of component loosening or radiolucent lines. Evidence of fingerlike projections of bone between the flanges of the implant was found in 24 cases (29%). CONCLUSIONS A cementless fluted pegged glenoid component showed excellent initial clinical survival and integration. Further studies regarding continued durability of this component appear warranted.