What tooth anomaly is characterized by the dental union of two embryologically developing teeth with separate pulp chambers?

The anomaly characterized by the dental union of two embryologically developing teeth with separate pulp chambers is fusion. In this condition, two distinct teeth unite in their development, resulting in a single larger tooth structure. Despite the physical connection, each tooth maintains its own pulp chamber, which is a critical characteristic that differentiates fusion from other dental anomalies.

For example, in contrast to gemination, where a single tooth attempts to split into two, fusion refers specifically to the merging of two separate teeth. The key feature of fusion is the presence of two pulp chambers, highlighting that while the teeth are joined, they are still distinct entities rather than being combined into one. This distinction is important for diagnostic and clinical purposes, as it can affect treatment planning and anticipated outcomes in dental care.

Other terms, like concrescence and twinning, also refer to different dental anomalies that do not involve the separate pulp chambers seen in fusion. Concrescence occurs when two teeth are joined specifically at their roots through cementum, without forming a distinct combined crown or pulp. Twinning is typically considered a variation of gemination and does not involve the union of two separate teeth. Understanding these nuances is essential for accurately identifying and managing dental anomalies.