Femoral fit in ABG-II hip stems, influence on clinical outcome and bone remodeling: a radiographic study

Introduction In a consecutive series of 64 patients with an ABG-II stem, we analyzed whether the tightness of the fit of the prosthesis affected bone remodeling and if there was a relation between clinical and radiological results. Materials and methods Radiographic analysis of bone remodeling in different Gruen zones was done. Bone density changes were graded as present or absent in the AP and lateral radiographs as compared with the previous sets of radiographs. Bone remodeling was compared to literature values of the ABG-I stem. Three stem levels were defined. The proximal level was set at the upper border of the lesser trochanter, the mid-stem level at halfway the stem and the distal level 1 cm above the tip of the prosthesis. Femoral fit was defined as tight when the ratio of the fit was ≥0.8 and as non-tight if the fit was