Author/Authors :
Tsuji, Chiaki Department of Oral and Maxillofacial Surgery - School of Dentistry - Aichi Gakuin University, Nagoya, Japan , Watanabe, Hiroshi Department of Oral and Maxillofacial Surgery - School of Dentistry - Aichi Gakuin University, Nagoya, Japan , Nakayama, Hidenori Department of Oral and Maxillofacial Surgery - School of Dentistry - Aichi Gakuin University, Nagoya, Japan , Goto, Mitsuo Department of Oral and Maxillofacial Surgery - School of Dentistry - Aichi Gakuin University, Nagoya, Japan , Kurita, Kenichi Department of Oral and Maxillofacial Surgery - School of Dentistry - Aichi Gakuin University, Nagoya, Japan
Abstract :
Subpontic osseous hyperplasia (SOH) is a growth of bone occurring on the edentulous ridge beneath the pontics of fixed partial
dentures (FPDs). This report describes a case of bisphosphonate- (BP-) related osteonecrosis of the jaw (BRONJ) in a SOH patient
followed by deciduation of the bony lesion. A 73-year-old woman visited a dental clinic after experiencing pain and swelling beneath
the pontics of a FPD that had been inserted 15 years ago. The pontics were removed, but the symptoms persisted and she was
referred to our hospital. There was an osseous bulge and gum swelling around the edentulous ridge of teeth 18 and 19, as well as
bone exposure. As she had been taking an oral BP for 6 years, we diagnosed this case as stage 2 BRONJ. Following BP withdrawal,
the bony lesion detached from the mandible. The tissue was diagnosed as sequestrum based on the histopathological findings. Two
months after deciduation, epithelialization over the area of exposed bone was achieved and no recurrence has been observed.
