Periprosthetic bone density around fully hydroxyapatite coated femoral stem

Carlo Trevisan, Marco Bigoni, Gianni Randelli, Edoardo Carlo Marinoni, Giovanni Peretti, Sergio Ortolani

Research output: Contribution to journalArticlepeer-review


In this study, periprosthetic bone mineral density was measured at scheduled time intervals after surgery by dual energy xray absorptiometry in 21 patients to assess the history of bone density redistribution after femoral stem insertion. Measurements of changes in bone density with time were obtained for the regions of the greater trochanter, the lateral cortex, the tip, the medial cortex, and the calcar. In all regions, bone density decreased during the first 3 months after surgery; this was followed by a prolonged period of 18 to 30 months of bone gain, a subsequent period of steady state, and the final resumption of bone aging processes after the third postoperative year. The greatest loss was observed in the calcar region after 6 months (greater than 50%). The characteristic pattern of time related bone density changes obtained in this study may make it possible to compare other pathologic, design, or stiffness related patterns. This could have clinical relevance in the early diagnosis of pathologic processes and as a means of evaluating prosthetic designs.

Original languageEnglish
Pages (from-to)109-117
Number of pages9
JournalClinical Orthopaedics and Related Research
Issue number340
Publication statusPublished - Jul 1997

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine


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