Periprothetische Knochendichteveränderung um den Hüftprothesenschaft Optan® Zementiert/Zementfrei im Verlauf eines Jahres

Abstract

Background: Periprosthetic bone loss is a well documented problem around cemented and cementless total hip arthroplasty (THA). So far there exists no comparison of stems with the same geometrical design. Patients and methods: We studied 25 patients (group A) receiving a cementless and 18 receiving a cemented Optan femoral component over the period of one year performing DEXA to detect periprosthetic BMD changes. Results: Clinical results documented with the Harris hip score and the WOMAC were equal in both groups. Bone loss was different in all Gruen zones except region 7 with the main bone loss in both groups. Interpretation: Fixation with or without cement changes the physiological load transfer in the femur with stress shielding in the proximal part as one of the main problems of cementless THA.