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 .
Bone cement with reduced proportion of monomer in total hip arthroplasty: Preclinical evaluation and randomized study of 47 cases with 5 years' follow-up
Bone  cement with reduced amount of monomer and low curing temperature may improve implant fixation due to reduced toxicity . We analyzed the mechanical , chemical and thermal properties of such a cement ( Cemex Rx ) using Palacos R as control . The in vivo performance of the 2 cements was also evaluated in a prospect i ve r and omized study of 47 hips , where either of the cement types was used to fixate Lubinus SP2 prostheses with the stem made of titanium alloy . Cemex Rx had a reduced tensile strength , probably because this cement was manually mixed , as recommended by the manufacturer . A st and ardized laboratory test showed lower curing temperature for Cemex , but measurements at 37 ° and with prechilled Palacos R and Cemex Rx , as in clinical work , showed no difference . In the clinical study radiostereometric measurements of cup and stem migration showed similar values in the 2 groups up to 5 years after the operation . The cement mantle was stable in both groups , but the stems migrated similarly inside the cement mantle regardless of the type of cement used . Proximal wear was low ( 0.04 - 0.05 mm/year ) and tended to be lower in the Cemex group ( p = 0.02 ) . Aluminum and vanadium levels in serum increased 5 years after the operation , but no difference was noted between the 2 groups . Collagen markers ( PICP , ICTP ) showed similar increases in bone turnover 6 weeks and 6 months after operation in both groups
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 .