[Case report of osteogenesis imperfecta].

Osteogenesis imperfecta (OGI) is a rare genetic disease which, as a result of a disorder in the formation of the organic stroma of the bone due to a defect in osteogenic function, induces brittle bones, whereby only weak forces bring about multiple, repeated pathological fractures. This disease is thought to entail various problems with regards to carrying out pediatric dentistry due to the ease with which bones may be fractured. We report here the findings obtained as a result of the careful examination of a 1-year-3-month-old girl encountered in our practice and who was diagnosed as having osteogenesis imperfecta. 1) Out of the three major symptoms for osteogenesis imperfecta, this case showed signs of fragile bones and blue scleras, but did not reveal signs of deafness. 2) There was retardation in system growth and development. 3) Aside from a high level of alkaline phosphatase, there were no notable abnormalities revealed in the biochemical blood tests. 4) Dentinogenesis imperfecta was observed throughout the erupted teeth. 5) There was a definite improvement in cooperation with each visit to the clinic.