[Radiological criteria of the evaluation of prosthetic hip implants]

The radiographic criteria are described for the evaluation of total hip replacement. The authors' purpose is to uniform all different parameters for a correct long-term radiographic follow-up. The basic radiographic parameters are pointed out for the assessment of eventual loosening/wearing out of prosthetic material: 1) correct positioning of the acetabular and femoral components; 2) initial wearing of the plastic; 3) state of the bone-cement, bone-implant attachments. These criteria represent the base for a prognostic evaluation of the implant, for they allow the quantification of the radiographic changes (sinking, demarcations, fractures of cement, loosening etc.) during time.