Tooth ankylosis is the fusion of the tooth to the bone, preventing
the tooth from erupting. This can happen in both primary
("baby") teeth and permanent teeth, and may
occur at any stage during development or eruption. The
cause of this condition is still uncertain. Theories
include trauma and heredity. An exam and x-ray
are the main diagnostic methods for determining ankylosis.
Some cases require surgical extractions
for orthodontic and functional purposes.