Subpontic osseous hyperplasia: A case report

Subpontic osseous hyperplasia is an ectopic growth of bone occurring on the edentulous ridge beneath a fixed partial denture replacing a mandibular fi rst molar. A 56-year-old woman experienced an enlargement of the hard and s oft tissues beneath the pontic region of a fixed partial denture replacing her mandibular left first molar. Following removal of the fixed partial den ture, the bony enlargement was surgically removed, and the bony fragments w ere submitted for histologic analysis, which demonstrated mature lamellar b one and appositional growth. One year postoperatively, there has been no re currence of the lesion. The possible etiologies and treatment modalities ar e reviewed and a rationale for treatment is presented.