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 .
The Influence of a Suction Device on Fixation of a Cemented Cup using RSA
The quality of technique used at the time of socket cementation is crucial in ensuring a durable long-term result of the implant . We asked whether a new instrument , an aspirator retractor introduced into the wing of the ilium before socket preparation and cementation , would enhance cement fixation as defined by RSA and radiographic examination . We r and omized 38 patients into two groups . The surgical technique was identical between the groups with the exception of the use of the aspirator retractor .  Patients were followed clinical ly and with radiostereometry at a minimum of 2 years . We compared gross radiographic appearances , including the depth of penetration of cement and the incidence of postoperative and 2-year radiolucent lines . There was no difference in proximal migration between the two groups . No improvement of fixation was proven from the measured translations and rotations of the socket in the suction group . We found no difference in the number or extent of radiolucent lines or the depth of cement penetration when the iliac suction device was used in conjunction with contemporary cementing techniques . Although the data suggest no short-term advantage in this small study , we will continue to follow these patients presuming there will be improved outcomes in the longer term and since the device provides an easier method of obtaining adequate fixation , especially if technical difficulties are encountered during the pressurization procedure
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 .