Deciduous teeth in which bone has fused to cementum and dentin, preventing exfoliation of the deciduous tooth and eruption of the underlying permanent tooth are termed

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A tooth is ankylosed if it is fused to bone. This condition is especially common with retained deciduous teeth. Embedded teeth do not erupt because of a lack of eruptive force. Impacted teeth cannot erupt because of physical obstruction. Erupted teeth are not fused to cementum and dentin.

Deciduous Teeth in Which Bone Has Fused to Cementum and Dentin