AIMS: The aim of the present study was to evaluate the 7-year functional outcome and radiographic results of primary total hip arthroplasties (THAs) performed with the uncemented Avenir stem. PATIENTS AND METHODS: Between January 2006 and October 2008, 100 consecutive primary hips in 92 patients were enrolled at 2 centres. The mean age at operation was 58.5 years (27-87 years). Mini-incision (50%) and standard approaches (50%) were used to implant 22 standard and 78 lateralised stems. RESULTS: The 7-year Kaplan-Meier survival rate was 98.9% (95% CI, 92.9-99.8) with stem revision for any reason as endpoint. No stem related complications occurred. 1 stem revision was due to deep infection at 51 months post-op. We had 4 acetabular revisions. The mean Harris Hip Score (HHS) at 7 years follow-up was 93.1 points (60-100). Radiographic analysis showed 2 patients had non-progressive radiolucent lines and no patient had any signs of stem subsidence or loosening. CONCLUSION: The 7-year implant survival and the functional outcomes for THA performed with the study device are excellent and were in line with those documented for comparable contemporary uncemented fully HA-coated stems. Longer term follow-up of this consecutive series needs to be performed.
AIMS: The aim of the present study was to evaluate the 7-year functional outcome and radiographic results of primary total hip arthroplasties (THAs) performed with the uncemented Avenir stem. PATIENTS AND METHODS: Between January 2006 and October 2008, 100 consecutive primary hips in 92 patients were enrolled at 2 centres. The mean age at operation was 58.5 years (27-87 years). Mini-incision (50%) and standard approaches (50%) were used to implant 22 standard and 78 lateralised stems. RESULTS: The 7-year Kaplan-Meier survival rate was 98.9% (95% CI, 92.9-99.8) with stem revision for any reason as endpoint. No stem related complications occurred. 1 stem revision was due to deep infection at 51 months post-op. We had 4 acetabular revisions. The mean Harris Hip Score (HHS) at 7 years follow-up was 93.1 points (60-100). Radiographic analysis showed 2 patients had non-progressive radiolucent lines and no patient had any signs of stem subsidence or loosening. CONCLUSION: The 7-year implant survival and the functional outcomes for THA performed with the study device are excellent and were in line with those documented for comparable contemporary uncemented fully HA-coated stems. Longer term follow-up of this consecutive series needs to be performed.
Entities:
Keywords:
Aseptic loosening; cohort follow-up; hip arthroplasty; primary hip replacement; uncemented stem
Authors: Ramakanth R Yakkanti; Dylan N Greif; Dennis J Vanden Berge; Raymond P Robinson Journal: Arch Orthop Trauma Surg Date: 2022-03-03 Impact factor: 3.067