Supernumerary teeth and tooth agenesis are common morphological anomalies in humans. We previously obtained evidence that supernumerary maxillary incisors form as a result of the successive development of the rudimentary maxillary incisor tooth germ in Usag-1 null mice. The development of tooth germs is arrested in Runx2 null mice, and such mice also exhibit lingual epithelial buds associated w...

In dentistry, the term 'fusion' is used to describe a developmental disorder of dental hard tissues. In the permanent dentition, fusion of a normal tooth and a supernumerary tooth usually involves the incisors or canines. However, a few cases of fusion involving premolars have also been reported to date. We present a rare case in which fusion of the maxillary left second premolar and a supernum...

AIM This was to assess the predictability of eruption of delayed permanent incisors after supernumerary removal and creation of adequate space, in relation to: root maturity, degree of vertical impaction, and degree of angulation of impaction. METHODS The dental records of children with supernumerary teeth delaying the eruption of permanent incisors were analysed. The type of a supernumerary ...

Developmental anomalies affecting the number of teeth are occasionally encountered clinically. The incidence of supernumerary teeth is approximately 1-3%. Among these are the maxillary anterior teeth, the maxillary molars, and the maxillo-mandubular premolars, in terms of descending order of occurrence. Supernumeraries occur rarely in the mandibular anterior teeth region. They may be either sup...

UNLABELLED Extra teeth in dentition is termed as 'supernumerary teeth' and is a very well-known dental developmental anomaly. Supernumerary premolars are a rare anomaly in the maxillofacial complex. Its rarity and complex characteristics often makes it difficult to treat. Radiographs play an important role in assessment of both the location and the typing of supernumerary teeth. This article re...

Analysis of breeding records suggests that the occurrence of fused and supernumerary molars in the rice rat, associated with lower body weight than normal and with reduced fertility, is dependent on a single autosomal recessive gene subject to background modification. Molar fusion, which is preceded by stripping of the external enamel epithelium from the interdental lamina, may involve the firs...

A supernumerary tooth is a tooth that is additional to the normal set of teeth and are most commonly seen in the anterior maxillary region [1]. Supernumerary teeth are more common in permanent dentition as compared to primary dentition. The prevalence is 0.15–1% in permanent dentition and 0.3–0.6% in the primary dentition with proportion of 2:1 for male sex [2]. The presence of a supernumerary ...

AIM The aims of this study were firstly to determine the fate of unerupted permanent maxillary incisor teeth following supernumerary tooth removal and secondly to make recommendations regarding the management of such incisor teeth following supernumerary tooth extraction. STUDY DESIGN This is a retrospective study. METHODS Records of children attending the Departments of Paediatric Dentistr...