Two cases of Multiple Idiopathic Root Resorption in Maxilla
Case 1: A 39-year-old woman was referred to our clinic with a chief complaint of discomfort in the right maxillary region. The radiographic examination revealed root resorption of 7 right maxillary teeth (from the central incisor to the second molar). The patient had no history of trauma, orthodontic treatment and general history. Over the next 2 months, the premolar teeth became mobile and also exhibited cervical erosion. Six months after initial consultation, the first and second premolar teeth were extracted. A biopsy of multiple areas of bone and soft tissue was undertaken. Histologically the soft tissue area showed proliferation of the fibrous connective tissue. The diagnosis was MIRR. After the operation, the prognosis was favorable without any sign of recurrence.
Case 2: A 26-year-old woman was referred to our hospital with a chief complaint of tooth movement in the anterior maxillary region. The radiographic examination revealed root resorption of 4 anterior maxillary teeth (from the right central incisor to the left canine). The patient had no history of trauma, orthodontic treatment and general history. Segmental resection of the maxillary alveolar bone including 3 teeth was performed. Histologic examination revealed chronic nonspecific inflammation.The diagnosis was MIRR. After the operation, the prognosis was favorable.
MIRR is a rare disease in which the roots of multiple teeth are resorbed without any particular cause. It is necessary to elucidate the pathogenesis and establish a treatment for MIRR.