Abstract
Histologic, physical and chemical analyses of the excised bony mass from a case of myositis ossificans traumatica were carried out. X-ray diffraction showed that the newly formed bone was an intermediate fluorhydroxylapatite. Infrared spectroscopy and chemical analysis supported this finding. Contrary to articular free bodies the mineral part of the bony mass from the myositis ossificans investigated was formed most probably in a basic environment.