INTERPRETATION The guidelines have improved method ological reporting in RSA studies , but adherence to these guidelines is still relatively low .
BACKGROUND AND PURPOSE Guidelines for st and ardization of  radiostereometry ( RSA )  of implants were published in 2005 to facilitate comparison of outcomes between various research groups .
In this systematic review , we determined how well studies have adhered to these guidelines .
Stepwise introduction of a bone-conserving osseointegrated hip arthroplasty using RSA and a randomized study: II. Clinical proof of concept—40 patients followed for 2 years
Background We have developed a bone-conserving commercially pure titanium hip replacement system using osseointegration principles : a metaphyseal loading proximal femoral component affixing into the retained neck and metaphysis only , leaving the femoral canal untouched . The acetabular cup closely fits a dual-geometry cavity , avoiding stress protection at the dome . Patients and methods After extensive laboratory and clinical pilot trial investigations , the surface-engineered implants were su bmi tted to a prospect i ve r and omized controlled clinical trial involving 40 patients ( 40 hips ) , in which they were compared to the cemented Spectron femoral component and cementless Trilogy cup as control implant . The following clinical measures were used to monitor progress at regular intervals for the first 2 postoperative years : radiostereometric analysis ( RSA ) , Harris Hip Score , pain score , WOMAC , and SF-36 . Results After 2 years of follow-up , no statistically significant differences were seen between the groups concerning rotation or translation along the cardinal axes . The patients receiving the Gothenburg osseointegrated titanium ( GOT ) system had significantly higher Harris Hip Score at 6 months , suggesting more rapid recovery . WOMAC , SF-36 and pain analysis were similar for the first 2 postoperative years . Interpretation Our RSA data suggest that osseointegration was achieved for all patients receiving the GOT hip system . This bone-conserving prosthesis may provide a good alternative , especially for young and active patients
INTERPRETATION The guidelines have improved method ological reporting in RSA studies , but adherence to these guidelines is still relatively low .
BACKGROUND AND PURPOSE Guidelines for st and ardization of  radiostereometry ( RSA )  of implants were published in 2005 to facilitate comparison of outcomes between various research groups .
In this systematic review , we determined how well studies have adhered to these guidelines .