Severe infraclusion ankylosis: report of three cases.

Tooth ankylosis may occur at any time during eruption and may show varying degrees of infraclusion. Cases of fully erupted teeth subsequently becoming totally embedded in bone are rare. The three reports described here show cases of severe infraclusion ankylosis; the etiology and related problems are discussed. Associated periodontal, prosthetic and orthodontic problems can be avoided with early diagnosis and treatment.