An Investigation into the Response of Palatally Displaced Canines to the Removal of Deciduous Canines and an Assessment of Factors Contributing to Favourable Eruption

Abstract

The effect of the removal of deciduous canines on palatally displaced maxillary canines was assessed and factors contributing to a successful outcome were analysed. Thirty-nine consecutive patients of mean age 11·2 years (standard deviation 1·43), with 47 palatalfy displaced canines were included in the study. The cases were examined clinically and radiographically for a maximum period of 2 years following deciduous canine removal. Twenty-nine (62 per cent) of the 47 ectopic canines achieved a normal eruptive position and nine (19 per cent) showed some improvement in eruptive position. The outcome of the removal of the deciduous canine depended on the position of the permanent canine. Horizontal overlap of the nearest incisor was found to be the most significant factor. If this exceeded half the tooth width, success was unlikely. The presence of crowding was found to affect adversely the favourable eruption of the canine. Discriminant analysis was carried out to try to identify clinical features which could act as prognostic indicators for the outcome of deciduous canine removal.

Bilateral congenitally missing cannines. A case Report

“…Ectopic eruption of canines is reported to be responsible for some 12 per cent of root resorption of permanent incisors in children 10-13 years of age. 9 7. There was also the remote possibility that the teeth may be congenitally missing, or their eruption impeded by some unusual oral pathosis, such as a supernumerary tooth or an odontome.…”

National clinical guidelines for management of the palatally ectopic maxillary canine

“…A later investigation appeared to confirm this finding, although the success rate was found to be slightly lower (62%). 21 Subsequently, in a longitudinal prospective study of this interceptive technique, 22 it was found that successful permanent canine eruption occurred in 36% of cases in the untreated control group but 65.2% of cases that had had isolated extraction of the deciduous canine, which was statistically significant. Interestingly, when (cervical pull) headgear was used, along with extraction of the deciduous canine, the success rate increased to 87.5%.…”

3 '2' 1: Orthodontic re-positioning of canines into central incisors

“…15 Another preventive measure suggested is the surgical exposure of the superficial and buccally impacted canine which may be enough to induce eruption. 16,17 Clinicians must be vigilant in detection and alerting dental factors include agenesis, dental malformation, short roots, taurodontism, invaginations and abnormal eruption.…”