Gemination is defined as an attempt to make two teeth from one enamel organ. Bilateral presentation of this phenomenon is very rare, with prevalence of 0.01% to 0.04% in the primary, and 0.05% in the permanent dentition. This paper describes a rare case of huge bilateral gemination of permanent maxillary central incisors in a nine-year-old Iranian boy with poor aesthetic. The patient did not ha...

Transposition may affect both sexes equally and, although it may occur in the maxilla or in the mandible, the frequency of maxillary permanent canine involvement is the greatest [3]. In the maxilla the canine is transposed most frequently with the first premolar (Figure 1a,b), less often with the lateral incisor followed rarely by central incisor or second premolar In the mandible transposition...

Aim The aim of the present study was to report the frequency of developmental disturbances in permanent teeth as a result of intrusive injuries to the primary predecessors and relate this to the degree of intrusion, the age of the child, the developmental stage of permanent germ and the treatment given. Methods Seventy children with previous intrusive trauma of their maxillary primary incisors ...

Purpose: To establish a new coordinate system using the incisive canal and incisive foramen in cases confirmed to have root resorption in the maxillary incisor region by cone beam computed tomography (CBCT) to investigate the positions of the central and lateral incisor roots and erupting maxillary canine tooth crowns in the horizontal plane. Methods: Nine patients (two males; mean age: 10.5 ye...

Where a permanent anterior tooth cross bite results from over-retention o[ z~ primary incisor, a rapid correction method may prove successlrul. When the over-retained primary incisor is extracted, the permanent successor in cross bite is tipped into the extraction site, correcting the cross bite. Moyers defines a simple anterior tooth cross bite as a dental malocclusion resulting from the abnor...

INTRODUCTION The purposes of this study were to determine the incidence of open gingival embrasures after a single mandibular incisor extraction and to investigate whether age, sex, interproximal pretreatment and posttreatment contact location, or the type of mandibular incisor were predictors of the incidence and magnitude of open gingival embrasures. METHODS Pretreatment and posttreatment i...

The purpose of this study was to determine the severity of gingival margin discrepancy affecting the mandibular incisors in children with a single-tooth anterior crossbite. The response of the position of the gingival margin to correction of the crossbite also was investigated. Twenty-two subjects with a single central crossbite and 16 subjects with a single lateral crossbite were identified fr...