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Supernumerary nines: Rare after all? an overview and case series Eleanor O'Grady Sophie Mills Veronica Phillips Costantinos Aristotelous Vijay Santhanam Dental Update 2024 50:11, 707-709.
Supernumerary molars are rarely reported in literature. A literature review was undertaken to identify the prevalence of supernumerary nines following multiple cases attending at local oral and maxillofacial clinics. The review found a prevalence range of 0.06–0.96% for supernumerary molars, with proliferation of epithelial remnants of dental lamina (induced by pressure or ‘induction factors’) being the most accepted aetiology. This article explores supernumerary molars and their associated comorbidities, such as disruption and damage to other teeth. The case studies illustrate management techniques.
CPD/Clinical Relevance: An awareness of supernumerary teeth and their management is of clinical benefit.
Article
Supernumerary teeth, a form of hyperdontia, are defined as an odontostomatological anomaly where teeth, or tooth substance, are in excess of the usual configuration of 20 deciduous and 32 permanent teeth.1,2,3,4 Supernumerary teeth are classified according to their position in the dental arch or their morphological form. Conversely, supplemental teeth are a type of hyperdontia without anatomical differences. These developmental abnormalities arise due to a combination of genetic and environmental factors.3,4
A supernumerary molar is defined by position as a paramolar, distomolar or parapremolar. Paramolars are small and rudimentary, often found buccally or palatally to maxillary molars.1,4,5 A distomolar is a fourth permanent molar, which is usually placed either directly distal or distolingual to the third molar.4 Finally, parapremolars commonly occur interproximally and buccally to the upper first and second premolars.1,3,4
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