Unerupted permanent incisors and associated dental anomalies

Abstract

Aim:The aim of the present study was to investigate the association between unerupted permanent incisors and dental anomalies among children and adolescents. Methods:The clinical records of patients between January 2005 and December 2014 were retrieved to identify those with unerupted permanent incisors. A retrospective audit on the presence or absence of any dental anomalies was done from all available records of the included patients. Results:A total of 266 patients with 320 unerupted permanent incisors were identified from the 15 987 patients in the study. Among the unerupted permanent incisors, 222 (69.4%) were associated with dental anomalies, which was significantly higher than those showing an absence of dental anomalies (N = 98, 30.6%, P < 0.001). For the unerupted maxillary central incisors, a significantly higher proportion was associated with supernumerary teeth (P < 0.001). For the unerupted maxillary lateral incisors, a significantly higher proportion was associated with the ectopic eruption of permanent canines when compared with other dental anomalies (P < 0.001). The presence of the ectopic eruption of permanent canine, double teeth, and hyperdontia was significantly higher among male patients with unerupted permanent incisors. Conclusions:Unerupted permanent incisors were associated with supernumerary teeth and ectopic eruption of permanent canines. Specifically, a higher proportion of unerupted maxillary central incisors was associated with the presence of supernumerary teeth, whereas a higher percentage of unerupted maxillary lateral incisors was associated with the ectopic eruption of permanent canines. K E Y W O R D S dental anomalies, ectopic eruption, permanent canines, supernumerary teeth, unerupted permanent incisors 1 | INTRODUC TI ON According to the updated clinical guidelines of Royal College of Surgeons of England, an observation or intervention is needed for unerupted permanent maxillary central incisors when there is aberration from the standard sequence of eruption, or the contralateral teeth have erupted >6 months ahead of the unerupted incisors, or both central incisors remain unerupted and the lower incisors erupted >1 year prior. 1 The incidence of unerupted maxillary incisors in 5-12-year-old children has been reported to be 0.13%, 2 while the How to cite this article: Tan C, Ekambaram M, Lee GHM, Yiu CKY. Unerupted permanent incisors and associated dental anomalies. J Invest Clin Dent. 2019;10:e12395. https://doi.

Root Resorption of the Permanent Central Incisor through Ectopic Eruption of the Maxillary Canine

“…Akkuc et al observed in their study, an incidence of maxillary permanent canine impaction of 3.43%, with resorption of maxillary lateral incisors in 33% of cases. Ectopic eruption of the permanent canine can also be related to the noneruption of the permanent lateral incisor [36]. In addition to concerns regarding the consequences of ectopic eruption in the involvement of oral there are also psychological consequences, with an impact on the quality of patients' lives, as also concluded by Masood et al This was noted in the patient in the present study because of the evident change in the smile line after the loss of the permanent central incisor.…”

“…Akkuc et al observed in their study, an incidence of maxillary permanent canine impaction of 3.43%, with resorption of maxillary lateral incisors in 33% of cases. Ectopic eruption of the permanent canine can also be related to the non-eruption of the permanent lateral incisor [ 36 ].…”