Migration of the Acetabular Socket After Total hip Replacement Determined by Roentgen Stereophotogrammetry

Surface Replacement of the Hip in Chronic Arthritis:A Clinical, Radiographic and Roentgen Stereophotogrammetric Evaluation

“…To achieve precise results by roentgen stereophotogrammetry the skeletal indicators must be widely spread in the bone (Olsson 1975, Baldursson et al 1980. Probst (1980) has developed a qualified method for roentgen stereophotogrammetry of prosthetic components and has also encountered the problem of skeletal indicators being too close to a straight line.…”

“…Roentgen stereophotogrammetry offers very high accuracy for the determination of the three-dimensional position of implants in the bone (Selvik 1974). This method has been used in Lund for the determination of migration and wear in THR (Baldursson et al 1979(Baldursson et al , 1980. It can also be used in surface replacement of the hip.…”

Definition of endoprosthetic loosening: Comparison of arthrography, scintigraphy and roentgen stereophotogrammetry in prosthetic hips

“…A detailed description of the RSA technique has been given by Selvik (1974), Baldursson et al (1979Baldursson et al ( , 1980 and Mogensen et al (1982). The term instability is used for prosthetic component displacement in relation to bone a t distraction-compression and a t rotation (Mjoberg et al 1984 b).…”

Migration of the Tibial Component in Successful Unicompartmental Knee Arthroplasty: A Clinical, Radiographic and Roentgen Stereophotogrammetric Study

“…A large compliance would allow the component to change position, for example with every step the patient takes, whereas a low compliance would result in a slow, flow-like migration, corresponding to stress being put on the prosthesis over a long period of time. By using different cementation techniques (Miller 1979) as well as no cement at all (Hungerford et al 1982, Blaha et al 1982, differences in both the development of zones as well as the patterns of movement can be anticipated.…”