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...

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...

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...

INTRODUCTION The position of lower incisor has been of considerable concern when planning an orthodontic treatment, having been recognized as one of diagnostic keys, Very important in the development of malocclusion and facial pattern. OBJECTIVES In this study we claim to determine the importance of the position and inclination of lower incisor in the different malocclusions and facial patter...

OBJECTIVE: To evaluate the influence of the initial vertical position of impacted maxillary incisor on spontaneous eruption frequency and its timing after surgical removal of the supernumerary tooth. Material And Methods: 44 patients with unilateral impaction of maxillary permanent central incisor with an average age of 10.5 years were studied for spontaneous eruption of impacted tooth. Orthopa...

2). O ccas ional ly , orthodontists and genera l dentists encounter a patient who has traumatically avulsed a maxillary central incisor or a pa tient with a geminated or fused maxillary central incisor that must be removed. In either situa tion, a decision must be made about the eventual restoration of the anterior edentulous space. Several options exist for replacing a missing maxillary centra...

The area of the oral vestibule is often a place where pathologies appear (e.g., peripheral odontomas). The origin of these pathologies is not fully understood. In the present study, we traced a cell population expressing Sonic hedgehog (Shh) from the beginning of tooth development using Cre-LoxP system in the lower jaw of wild-type (WT) mice. We focused on Shh expression in the area of the earl...

Background To evaluate if changes in lower incisor position following orthodontic treatment are correlated with development of gingival recessions. Material and Methods Pre- and post-treatment digital models and lateral cephalograms of 22 subjects were collected retrospectively. The clinical crown length, gingival scallop, and papilla height of the central lower incisor were measured along wi...

OBJECTIVE To evaluate the magnitude of lower incisor inclination associated with the vertical facial type in adolescent Class II patients treated with the Xbow appliance. MATERIALS AND METHODS A total of 172 consecutive Class II patients treated with only the Xbow appliance were used. The sample was divided into three groups based on their vertical facial type (24 short, 122 normal, and 25 lo...