Effect of interceptive extraction of deciduous canine on palatally displaced maxillary canine: A prospective randomized controlled study

Abstract

Objective: To evaluate the effect of the extraction of deciduous canines on palatally displaced canines (PDCs), to analyze the impact of the age of the patient on this interceptive treatment, and to assess the outcome of one-sided extraction of a maxillary primary canine on the midline of the maxilla. Materials and Methods: This study included 48 PDCs in 24 consecutive patients with bilateral PDCs. The mean age of the patients at diagnosis was 11.6 years (standard deviation 1.2 years). After randomization, one deciduous canine of each patient was assigned to extraction, and the contralateral side served as control. The patients were then followed at 6-month intervals for 18 months with panoramic and intraoral occlusal radiographs. Results: The rates of successful eruption of the PDCs at extraction and control sites were 67% and 42%, respectively, at 18 months. The difference between the sites was statistically significant, and the effect was significantly more pronounced in the younger participants. A significant decrease in arch perimeter occurred at extraction sites compared to control sites during the observation period. No midline shift toward the extraction side was observed in any patient.

Space conditions, palatal vault height, and tooth size in patients with and without palatally displaced canines: A prospective cohort study

“…1 Therefore, early diagnosis and interceptive measures are associated with better treatment prognosis. Some interceptive procedures presented in the literature are extraction of deciduous canines [2][3][4][5] only or, in addition to placement of a transpalatal bar, expansion of the maxilla, 6 and preservation or lengthening of the dental arch length by means of extraoral traction. 7 Two major theories have been proposed to explain the etiology of palatally displaced canines (PDCs): guidance theory and genetic theory.…”

Extraction of primary canines for interceptive orthodontic treatment of palatally displaced permanent canines: A systematic review

“…Table 5 presents the evaluation of the methodological quality of the four studies included in the present systematic review. The two recent studies 21,22 scored higher than did the two older studies. 26,27…”

“…It was encouraging to find two recent studies 21,22 with better methodological rigor than previous studies 26,27 that were also included in similar systematic re- a Methodological quality criteria adapted from the CONSORT statement (24), Jadad quality assessment scale (25), and previous similar studies (3,20). views.…”

“…Three studies 21,22,26 received ethical approval from the respective institutional review boards/committees, and these studies also specified that verbal or written consent was obtained from the subjects or their parents/guardians. Leonardi et al 27 did not obtain ethical approval from an institutional review board; however, the authors received informed consent from the study participants or parents.…”

“…3,19,20 As a result, two recent randomized clinical trials reported the spontaneous correction of PDCs after the extraction of primary canines. 21,22 The present systematic review summarized the relevant randomized clinical trials to provide reliable estimates of the efficacy of interceptive orthodontic intervention, specifically, to find out whether successful management of PDCs can be achieved by interceptive extraction of deciduous maxillary canines.…”