Ectopic eruption of first permanent molars: presenting features and associations.

被引：28

作者：

Mooney G.C. ^{[1
]}

Morgan A.G. ^{[1
]}

Rodd H.D. ^{[1
]}

North S. ^{[1
]}

机构：

[1] Dept. Paediatric Dentistry, Charles Clifford Dental Hospital, Sheffield

来源：

European Archives of Paediatric Dentistry | 2007年 / 8卷 / 3期

关键词：

Ectopic eruption; first permanent molar; dental anomalies; cleft lip and palate;

D O I：

10.1007/BF03262586

中图分类号：

学科分类号：

摘要：

To investigate presenting features of ectopically erupting first permanent molars and associations with other dental anomalies. Prospective convenience study. 28 panoral radiographs were collected, over a 24-month period, of 7-11 year-old children with radiographic evidence of ectopic eruption of first permanent molars who presented to a Dental Teaching Hospital in the North of England. A further 20 radiographs were collected of matched patients with no evidence of ectopic molar eruption. All radiographs were analysed under standard conditions to record the distribution and type of ectopic eruption (if present). In addition, the presence of the following dental anomalies was noted: cleft lip and/or palate; supernumerary teeth; hypodontia, and infraocclusion of primary molars. Chi-squared analysis was performed to determine any significant differences in the frequency of these dental anomalies between ectopic molar and control groups. For patients with ectopic molar eruption, the majority demonstrated ectopic eruption of either one or two first permanent molars (32% and 57% of subjects respectively). There were a similar proportion of 'jumps' and 'holds'. 92% of these were maxillary teeth and there was equal left and right distribution. Interestingly, a positive record of ectopic eruption was only documented in the dental records of 35.7% of these subjects. Children with ectopic eruption were significantly more likely to have at least one additional dental anomaly than was the case for the control group (60.7% versus 25%). Notably, primary molar infraocclusion and cleft lip/palate were significantly more frequent in the ectopic group. This study, the first in a British population, has identified a significant association between ectopic eruption of first permanent molars and other dental anomalies. A multifactorial aetiology is thus supported and clinicians should be alert to the co-existence of ectopic eruption and other dental anomalies.

引用

页码：153 / 157

页数：4

共 37 条

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