Source of Support: None, Conflict of Interest: None
The early and late roentgenograms of the first 50 consecutive Charnley low friction artheoplasties, performed at Medical College and Hospital, Rohtak from 1975 to 1982, demonstrated interesting reactions of the joint structure. Osteoporosis, early breakage of the wires and a trochanteric bed covered by cement were the main factors preventing or delaying the healing of the osteotomy of the greater trochanter. Almost all the hips showed a radiolucent line at the acetabular bone-cement junction and about half at femoral bone-cement junction. One third of the hips had increased femoral cortical thickness. One hip had sterile loosening of the femoral component with a varus shift. Dislocation of components was observed in 2 cases. Though 4 hips had some ectopic ossification, in only one hip it was severe enough to adversely affect the end result. The use of radio-opaque cement seems advantageous over the radiolucent type.