In which type of Dentinogenesis Imperfecta are primary teeth more severely affected?

Dentinogenesis Imperfecta is a genetic disorder that affects the structure and composition of dentin, leading to various dental abnormalities. Shields Type I is specifically associated with osteogenesis imperfecta, a condition that results in fragile bones and has been observed to affect primary teeth more severely than secondary (permanent) teeth.

In Shields Type I, the structural integrity of the primary teeth is significantly compromised, resulting in features such as a blue-gray or yellow-brown coloration, increased translucency, and a higher likelihood of wear and fracture compared to secondary teeth. This heightened severity in primary teeth occurs because the dentin mineralization process is altered, making the primary teeth more vulnerable to environmental factors and mechanical stresses.

In contrast, the other types of Dentinogenesis Imperfecta (Types II, III, and IV) show less pronounced differences in the severity of involvement between primary and secondary teeth, with Type II often presenting a more uniform impact on both dentitions. Thus, when considering the severity of the condition in primary teeth as opposed to permanent teeth, Shields Type I stands out as the type where primary teeth are more dramatically affected.