Aim: To assess the mid term clinical and radiographic results of the ABG II uncemented hip arthroplasty.

Methods: All patients treated consecutively with the ABG hip (n=42) as a primary total arthroplasty were identified and contacted. The response rate was 89% (n=38). Responders were assessed by means of the Merle D’Aubigne1 (MDA) scoring system and radiographs taken. Radiographic assessment was carried out by two independent assessors who were blinded to the clinical outcomes. An overall assessment of loosening was made based on seven radiographic signs.

Results: The mean age of patients was 61 years (range: 44–73). Average MDA score at present day follow up was 17.6 (maximum 18) and did not decline with time post surgery. There was no evidence of radiographic loosening in any hips. There was one revision for a peri-prosthetic fracture sustained 10 days post op. Survivor-ship (all cases) was 100% for cup and 97.37% for stem at 7 years. There was no evidence of early cup loosening.

Discussion A recent study has shown unacceptably high rates of cup failure secondary to premature wear and osteolysis2 but this has not been evident in this series. Although this study did show cup eccentricity in 4 patients (representative of liner wear) there was no clinical nor radiographic evidence of cup loosening, osteolysis or failure.

Conclusion In the medium term we have shown excellent clinical outcomes with no evidence of early loosening of the ABG II hip prosthesis