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: I. Preliminary investigations—52 patients followed for 3 years
Background We developed a total hip system using osseointegration guidelines , a metaphyseal-loading proximal femoral replacement in the retained neck and a dual-geometry titanium shell in the acetabulum . Patients and methods A r and omized controlled clinical trial was undertaken in 52 patients ( 53 hips ) , using the cemented Spectron stem and cementless Harris-Galante II cup as control implants  ( 24 patients in experimental group , 29 control patients ) . Clinical measures of Harris Hip Score ( HHS ) , pain score and radiostereometric analysis ( RSA ) at regular intervals for up to three years were used to monitor progress . Results No statistically significant differences were found in HHS and pain score ; the stability of the cementless experimental implant was also comparable to that of the cemented controls by RSA . 3 revisions were required for migration in the experimental group and 1 was required for component dislocation in the control group . Interpretation Our findings indicate the practicality of osseointegration of titanium implants , but suggest that current performance is inadequate for clinical introduction . However , the stable fixation achieved in the retained neck in the majority of patients is indicative of osseointegration . This finding will encourage technical and design improvements for enhancement of clinical osseointegration and should also encourage further study . Periprosthetic osteolysis might be avoided by the establishment and maintenance of direct implant-bone connection : “ osseointegration ”
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 .