supernumerary root


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su·per·nu·mer·ar·y root

(sūpĕr-nūmĕr-ar-ē rūt)
Tooth root in excess of number usually present, taking into acount normal variability of a given tooth.
References in periodicals archive ?
The significant variant in mandibular first permanent molar is the existence of supernumerary root that can be found distolingually.
Most of the reported data on dental anomalies in Indian populations are case reports of supernumerary teeth, supernumerary root, hypodontia, double teeth, and talon cusps.
Supernumerary root in deciduous dentition is very rare and occurs most commonly in mandibular molars and in canines.
Supernumerary root is a developmental condition and may involve any tooth.
In the permanent dentition supernumerary roots are not uncommon; with normally single-rooted permanent premolars and canines being particularly affected.
Other researchers have suggested that fusion or gemination may be related to the clinical presentation of supernumerary roots. The enamel organ plays an important part in root development by forming Hertwig's epithelial root sheath, which moulds the shape of root and initiates dentin formation.
The findings of Morrow and Hylin, whose primary central incisors all demonstrated bifurcation only in the apical fourth of the roots, suggest that the potential for developing supernumerary roots is present throughout the course of root elongation.
The mandibular first molar is a frequently treated tooth and has a wide variety of root canal configurations.3 Varia- tions in the morphology of the dental pulp are caused by genetic and environmental influences, and there is very definite need for clinicians to be made aware of the frequency of racially determined forms.4 The major variant in mandibular first molars is the presence of a supernumerary root that can be found distolingually and has a curve at the apex.
Also supernumerary root in primary teeth may have potential of interference with eruption of the succedanuous teeth.
In multirooted teeth, morphodifferentiation continues but the stimulating factors are not known yet.6 If during dental development the epithelial sheath of Hertwig is disrupted or folded, supernumerary roots and accessory root canals may be formed.
Hence, an accurate diagnosis of these supernumerary roots can avoid complications is the endodontic procedures.
In dysmorphic, supernumerary roots, its formation could be related to external factors during odontogenesis, or to penetrance of an atavistic gene or polygenetic system (13).