The aim of the present study is to report the demographic and clinical characteristics of all jaw cysts diagnosed in a single Oral Pathology Department. 5294 cases of jaw cysts diagnosed during a 38-year period were retrospectively collected and classified according to the latest classification of Head and Neck Tumors of the World Health Organization. The patients' gender and age, as well as the main clinical features of the cysts were retrieved from biopsy report forms. Jaw cysts were more common in male patients, with a male to female ratio of 1.6:1. Most patients were in the 4th-6th decade of life, with a mean age of 42.3 ± 16.1 years. There was no jaw predilection and the majority of lesions were more commonly encountered in the anterior region of the maxilla, followed by the molar region of the mandible. The most common jaw cyst was radicular cyst followed by dentigerous cyst, residual cyst and odontogenic keratocyst. The majority of jaw cysts are of inflammatory origin and represent a sequale of pulp necrosis. However, other type of jaw cysts may also be found.

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Objective Oral ulceration with bone sequestration (OUBS) describes a site‐specific intraoral ulcer that covers exposed, non‐vital bone in patients lacking any etiological factor known to induce osteonecrosis. We aimed to conduct a retrospective study of eight new cases of OUBS and review the literature. Subjects and Methods This is a retrospective study of OUBS cases, diagnosed and managed during 2007–2017. Inclusion criteria were the presence of oral ulcer with exposed non‐vital bone at sites of bone prominence and the absence of any factor known to cause osteonecrosis. The English literature was reviewed on original OUBS cases. Results Eight patients (5 males and 3 females, aged 27–75 years) were diagnosed with OUBS during years 2007–2017. Four cases involved the mandibular mylohyoid ridge, one a mandibular anterior exostosis and three the maxillary buccal/palatal exostoses. Exposed bone was removed under local anesthesia, resulting in complete healing in all cases. The literature review yielded 32 OUBS cases in the mandible. Conclusion Oral ulceration with bone sequestration is a distinct, probably under‐reported rather than rare clinical entity that should be regarded the provisional diagnosis in case of an oral ulcer covering exposed, non‐vital bone at sites of bone prominence in patients lacking any etiological factor known to induce osteonecrosis.