Bilateral fusion of primary mandibular lateral incisors and canines: a report of a rare case

Abstract

Purpose: Synodontia or fusion is a developmental anomaly of shape of tooth formed by union of two independently developing primary or secondary teeth. Prevalence of tooth fusion is estimated at 0.5-2.5% in the primary dentition and less in permanent dentition. The bilateral type of fusion in the primary dentition is rare and is about 0.02%. This paper describes a rare case of bilateral fusion of primary mandibular lateral and canine teeth.Case description: An 8 year old girl had a complaint of unusually large sized teeth in her mandible. After physical examination and use of periapical radiographs and study models bilateral fused teeth in the mandibular lateral incisor and canine region was diagnosed.Conclusion: The bilateral fusion of primary mandibular lateral and canine teeth is a rare condition and should be carefully evaluated to diagnose any associated pathology.Key words: Fusion; synodontia; primary teeth; developmental anomaly; double tooth ResumoObjetivo: Sinodontia ou fusão é uma anomalia de desenvolvimento da forma do dente formado pela união de dois dentes decíduos ou permanentes em desenvolvimento de forma independente. A prevalência de fusão dental é estimada em 0,5 a 2,5% na dentadura decídua e menor na permanente. O tipo de fusão bilateral na dentadura decídua é rara e aproximadamente de 0,02%. Este artigo descreve um caso raro de fusão bilateral de dentes decíduos incisivos laterais e caninos inferiores.Descrição do caso: Uma menina de 8 anos de idade tinha uma queixa clínica de dentes de tamanho grande anormal em sua mandíbula. Após exame físico e uso de radiografias periapicais e modelo de estudo, a fusão bilateral de dentes decíduos incisivos laterais e caninos inferiores foi diagnosticada.Conclusão: A fusão bilateral de dentes decíduos incisivos laterais e caninos na mandíbula é uma condição rara e deve ser cuidadosamente avaliada para diagnosticar quaisquer patologias associadas.

Bilateral Fusion of Primary Mandibular Incisors: A Rare Case Report

“…Several problems occurred in permanent dentition follow fused primary teeth such as repeated double teeth, hypodontia (missing teeth), supernumerary teeth and peg shaped teeth [1]. Also, double primary teeth may cause delayed resorption of the root because of the big root mass, resulting in delayed or ectopic eruption of permanent teeth [4].…”

Bilateral Fusion in Mandibular Primary Anterior Teeth: Report of a Rare Case With a Brief Review of Literature

“…9 Fused primary teeth may result in delayed resorption of roots due to its big root mass thereby leading to ectopic resorption of the permanent teeth. 10 The presence of fused teeth in primary dentition has been associated with absence of permanent dentition and the prevalence depends on the combination of fused primary teeth. 11 Cases of fusion of primary mandibular anterior teeth associated with partial anodontia of both primary and permanent dentition 12 or with anodontia of permanent dentition alone have also been reported.…”

Bilateral fusion of mandibular second premolar and supernumerary tooth: A rare case report

“…[ 5 ] Fusions are usually unilateral and in only 0.02% of the cases are bilateral. [ 1 6 ] Literatures reveal the prevalence of bilateral fusion in primary teeth to be 0.01–0.04% and in permanent teeth as 0.05%. [ 6 ]…”

“…Fusion of primary teeth may lead to hypodontia, malformation, impaction, delayed, or altered path of eruption of permanent successors. [ 4 6 ]…”