Ectopic eruption of the permanent maxillary first molar: Study in a population of 505 South European children

Alejandro Iglesias-Linares,Asunción Mendoza-Mendoza,Beatriz Solano-Mendoza,Carolina Caleza-Jiménez,Ernesto González-Mallea,Guadalupe Villalon-Rivero,Rosa Yañez-Vico

doi:10.5348/d01-2014-2-oa-2

Alejandro Iglesias-Linares, Asunción Mendoza-Mendoza + Show 5 more

Open Access

https://doi.org/10.5348/d01-2014-2-oa-2

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Abstract

Aims: Ectopic eruption is a change in the normal path of eruption of a tooth. The aim of this study is to determine the prevalence of ectopic eruption of the permanent maxillary first molars in a Spanish subpopulation of 505 children, its distribution as regards age and gender, unilateral and bilateral occurrence and loss of space. Methods: Periapical and panoramic X-rays were taken of the patients, with six-monthly check-ups to evaluate development. A statistical analysis of the data was performed using the chi-square test (p lessthan 0.05, 95% C.I). Results: A prevalence of 6.7% was obtained being the most common age of presentation was seven years and bilateral occurrence (67.6% of cases) with no statistically significant differences as regards to the gender. Only 14 of the 505 explored patients required treatment for ectopic eruption. Conclusion: This study provides information regarding treatment needs and prevalence regarding molar ectopic eruption in a Spanish population. It is essential for professionals to be familiar with the diagnostic factors, clinical consequences and therapeutic options for ectopic eruption of permanent molars.

Highlights

It is essential for professionals to be familiar with the diagnostic factors, clinical consequences and therapeutic options for ectopic eruption of permanent molars
Ectopic eruption of the permanent maxillary first molars is defined as a disturbance in the eruptive path of the tooth in an abnormal position or orientation, so that it erupts towards the distal aspect of the crown of the primary maxillary second molar
Mooney et al and Baccetti associate the ectopic eruption of the permanent first molars with other anomalies, such as infraocclusion of primary molars and cleft palate and Becktor et al state that patients with ectopic eruption of the permanent maxillary first molar have a higher risk of ectopic eruption of the permanent maxillary canine with root resorption of the permanent maxillary incisors [9,10,11]

Summary

Introduction

Ectopic eruption of the permanent maxillary first molars is defined as a disturbance in the eruptive path of the tooth in an abnormal position or orientation, so that it erupts towards the distal aspect of the crown of the primary maxillary second molar. (1) Reversible ectopic eruption (or “jump”): the permanent molar recovers its eruptive path spontaneously and erupts in the normal position in the dental arch, but with a more or less pronounced atypical resorption of the distal root of the primary second molar. Mooney et al and Baccetti associate the ectopic eruption of the permanent first molars with other anomalies, such as infraocclusion of primary molars and cleft palate and Becktor et al state that patients with ectopic eruption of the permanent maxillary first molar have a higher risk of ectopic eruption of the permanent maxillary canine with root resorption of the permanent maxillary incisors [9,10,11]

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