Which type of dentin dysplasia is associated with normal-shaped pulp chambers?

The condition associated with normal-shaped pulp chambers is Type II: Coronal Dentin Dysplasia. In this type, the coronal dentin is affected, leading to anomalies in the shape and structure of teeth, but the pulp chambers remain normal in shape.

Type I: Radicular Dentin Dysplasia is characterized by abnormal root development which results in small, irregularly shaped pulp chambers.

Type III: Mixed Dentin Dysplasia involves both pulp and root abnormalities, resulting in irregular and malformed pulp chambers.

Type IV: Areal Dentin Dysplasia, a less commonly referenced type, would also likely result in alterations to pulp chamber morphology.

Therefore, the distinguishing feature of Type II is that while the enamel and dentin may exhibit abnormalities, the pulp chambers typically retain their normal anatomical shape.