Table 1: Classification of osteogenesis imperfecta (OI).
The classification is based on the proposals and descriptions of Van Dijk and Sillence [4]. The optional presence of dentinogenesis imperfecta increases the likelihood of further skeletal changes and symptoms. The frequencies are approximations to the observed phenotypes derived from the literature and vary according to the preferred classification criteria. Some authors divide patients with OI into further types beyond the presented classification, which numerically follow the presented number series.