Zeitschrift für Orthopädie und ihre Grenzgebiete
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Z Orthop Ihre Grenzgeb · Nov 1997
[Periprosthetic mineral density in cement-free hip replacement arthroplasty].
We analysed the periprosthetic bone mineral density (BMD) in a prospective longitudinal study over two years after operation and in a separate cross-sectional study more than five years after implantation of cementless total hip arthroplasty (CLS-stem, Mecron threaded acetabular cup) by using dual-energy X-ray absorptiometry (DEXA). ⋯ The results reflect the different stress on the periprosthetic bone after implantation of the prosthesis and fit to earlier reported good clinical results of the CLS-stem and to increased loosening rate of threaded acetabular cups after five years. Analysing changes of mineralisation in cementless total hip arthroplasty DEXA together with the analization scheme according to Gruen at the femur and to De Lee and Charnley at the acetabulum is a useful method and has been reliable in clinical practise.
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Z Orthop Ihre Grenzgeb · Nov 1997
[10 years follow-up of athrodeses of the hindfoot joints and upper ankle joint].
What is the clinical and radiographic outcome of arthrodeses at the hindfoot and at the ankle more than 10 years postoperatively? ⋯ An unacceptably low rate of bony union in some locations, a high incidence of secondary degenerative changes at neighboring joints, and a persistent abnormality of the plantar weightbearing pattern in the operated feet demonstrate unsatisfactory results with the techniques used more than 10 years ago. We now recommend stable internal fixation with optimum adaptation of the bone surfaces of the arthrodesis.