title: [Horizontal root fracture repaired by cementum--a case report].
abstract: Horizontal root fractures are rare among dental trauma. According to Dr. Andreasen's report there are four types of repairs after root fractures. They are 1. healing with calcified tissue; 2. interposition of connective tissue; 3. interposition of connective and bony tissue; 4. interposition of granulation tissue. This report presented a case of horizontal root fracture in a 27 years old female patient. The patient had a trauma in the front teeth about 15 years ago. Spontaneous healing occurred without dental treatment at that moment. However, symptoms appeared recently as a dento-alveolar abscess. Radiograph revealed a horizontal fracture at the middle third of the root portion of the left upper central incisor, and irregular hard tissue over the fractured area. Histologically, the main component of repair tissue is cementum.
authors.forename: K R
authors.initials: KR
authors.lastname: Lin
authors.forename: J S
authors.initials: JS
authors.lastname: Kuo
mesh_terms: D000328:Adult; D003739:Dental Cementum; D005260:Female; D006801:Humans; D014082:Tooth Fractures / Q000628:therapy*; D014092:Tooth Root / Q000293:injuries*