The ABG hydroxyapatite-coated hip prosthesis

Rogers, Aimee; Kulkarni, Rajiv; Downes, E.M.

doi:10.1016/s0883-5403(03)00208-0

Cited by 43 publications

(13 citation statements)

References 9 publications

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“…The bone loss observed did not appear to affect the clinical outcome of our patients, which was similar to that in previous reports on these stems (Rogers et al 2003, Herrera et al 2004, Rahmy et al (2004, Benum and Aamodt 2010). …”

Section: Discussionsupporting

confidence: 92%

Periprosthetic bone loss after insertion of an uncemented, customized femoral stem and an uncemented anatomical stem

Nysted¹,

Benum²,

Klaksvik³

et al. 2011

Acta Orthopaedica

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Background and purposeCustomized femoral stems are designed to have a perfect fit and fill in the femur in order to achieve physiological load transfer and minimize stress shielding. Dual-energy X-ray absorptiometry (DXA) is regarded as an accurate method for detection of small alterations in bone mineral density (BMD) around hip prostheses. We present medium-term DXA results from a randomized study comparing a customized and an anatomical femoral stem.Methods100 hips were randomized to receive either the anatomical ABG-I stem or the Unique customized femoral stem, both uncemented. DXA measurements were conducted postoperatively and after 3, 6, 12, 24, 36, and 60 months, and BMD was computed for each of the 7 Gruen zones in the proximal femur.ResultsResults from 87 patients were available for analysis. 78 completed the 5-year follow-up: 35 patients in the ABG group and 43 patients in the Unique group. In both groups, we found the greatest degree of bone loss in the proximal Gruen zones. In zone 1, there was 15% reduction in BMD in the ABG-I group and 14% reduction in the Unique group. In zone 7, the reduction was 28% in the ABG-I group and 27% in the Unique group. The only statistically significant difference between the groups was found in Gruen zone 4, which is distal to the tip of the stem, with 1.6% reduction in BMD in the ABG-I group and 9.7% reduction in the Unique group (p = 0.003).Interpretation5-year DXA results showed that because of stress-shielding, proximal bone loss could not be avoided—either for the anatomical ABG-I stem or for the customized Unique stem.

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Section: Discussionsupporting

confidence: 92%

Periprosthetic bone loss after insertion of an uncemented, customized femoral stem and an uncemented anatomical stem

Nysted¹,

Benum²,

Klaksvik³

et al. 2011

Acta Orthopaedica

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“…The literature search yielded 5,290 hits, and 49 studies were included, involving a total of 38,013 acetabular cups; see Figure 1 (Howie et al 1990, Partio et al 1994, Latimer et al 1996, Woolson et al 1996, Chiu et al 1997, Furnes et al 1997, Tompkins et al 1997, Bohm and Bosche 1998, D’Lima et al 1998, Kesteris et al 1998, Callaghan et al 1999, Petersen et al 1999, Ragab et al 1999, Thanner et al 1999, Garellick et al 2000, Ricci et al 2000, Archibeck et al 2001, Oosterbos et al 2001, Espehaug et al 2002, Rogers et al 2003, Duffy et al 2004, Fink et al 2004, Herrera et al 2004, Parvizi et al 2004, Sinha et al 2004, Ender et al 2005, Min et al 2005, Badhe and Livesley 2006, Eskelinen et al 2006, Castoldi et al 2007, Firestone et al 2007, Gjengedal et al 2007, Hing et al 2007, Ince et al 2007, Surdam et al 2007, D’Angelo et al 2008, Gallo et al 2008, Garcia-Rey et al 2008, Heilpern et al 2008, Makela et al 2008, McBryde et al 2008, Steffen et al 2008, Williams et al 2008). The mean AQUILA methodological quality score of the survival studies was 7.3 (SD 1.1) on an 11-point scale.…”

Section: Resultsmentioning

confidence: 99%

Early proximal migration of cups is associated with late revision in THA

et al. 2012

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Background and purpose The association between excessive early migration of acetabular cups and late aseptic revision has been scantily reported. We therefore performed 2 parallel systematic reviews and meta-analyses to determine the association between early migration of acetabular cups and late aseptic revision.Methods One review covered early migration data from radiostereometric analysis (RSA) studies, while the other focused on revision rates for aseptic loosening from long-term survival studies. Thresholds for acceptable and unacceptable migration were classified according the Swedish Hip Arthroplasty Register and the Australian National Joint Replacement Registry: < 5% revision at 10 years.Results Following an elaborate literature search, 26 studies (involving 700 cups) were included in the RSA review and 49 studies (involving 38,013 cups) were included in the survival review. For every mm increase in 2-year proximal migration, there was a 10% increase in revision rate, which remained after correction for age, sex, diagnosis, hospital type, continent, and study quality. Consequently, proximal migration of up to 0.2 mm was considered acceptable and proximal migration of 1.0 mm or more was considered unacceptable. Cups with proximal migration of between 0.2 and 1.0 mm were considered to be at risk of having revision rates higher than 5% at 10 years.Interpretation There was a clinically relevant association between early migration of acetabular cups and late revision due to loosening. The proposed migration thresholds can be implemented in a phased evidence-based introduction, since they allow early detection of high-risk cups while exposing a small number of patients.

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“…Several authors have reported good results for the stem (Tonino et al 1995, Giannikas et al 2002, Rogers et al 2003, Bidar et al 2009). Regarding stability, when evaluating stability related to weight bearing after total hip arthroplasty, Thien et al (2007) found that the ABG-I stem was stable both for subsidence and rotation.…”

Section: Discussionmentioning

confidence: 99%

Small and similar amounts of micromotion in an anatomical stem and a customized cementless femoral stem in regular-shaped femurs

Nysted¹,

Foss²,

Klaksvik³

et al. 2014

Acta Orthopaedica

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Background and purposeHigh primary stability is important for long-term survival of uncemented femoral stems. Different stem designs are currently in use. The ABG-I is a well-documented anatomical stem with a press-fit design. The Unique stem is designed for a tight customized fit to the cortical bone of the upper femur. This implant was initially developed for patients with abnormal anatomy, but the concept can also be used in patients with normal femoral anatomy. We present 5-year radiostereometric analysis (RSA) results from a randomized study comparing the ABG-I anatomical stem with the Unique femoral stem.Patients and methods100 hips with regular upper femur anatomy were randomized to either the ABG-I stem or the Unique femoral stem. RSA measurements were performed postoperatively and after 3, 6, 12, 24, and 60 months.ResultsRSA measurements from 80 hips were available for analysis at the 5-year follow-up. Small amounts of movement were observed for both stems, with no statistically significant differences between the 2 types.InterpretationNo improvement in long-term stability was found from using a customized stem design. However, no patients with abnormal geometry of the upper femur were included in this study.

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The ABG hydroxyapatite-coated hip prosthesis

Cited by 43 publications

References 9 publications

Periprosthetic bone loss after insertion of an uncemented, customized femoral stem and an uncemented anatomical stem

Periprosthetic bone loss after insertion of an uncemented, customized femoral stem and an uncemented anatomical stem

Early proximal migration of cups is associated with late revision in THA

Small and similar amounts of micromotion in an anatomical stem and a customized cementless femoral stem in regular-shaped femurs

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