Transversal changes in dental arches from non-extraction treatment with self ligating brackets

Abstract

The results indicated that the majority of transverse changes occurred at the premolar areas, both the first and the second, as well as on the upper and lower dental arches. The intercanine distance increased 0.75 mm, on average, in the upper arch and 1.96 mm in the lower arch. The molars also demonstrated a tendency towards an increase in their transverse dimension, however, at a lower intensity comparing to premolars. All measurements presented statistically significant differences with the exception of the maxillary second molars.

Evaluation of the alignment efficiency of nickel-titanium and copper-nickel-titanium archwires in patients undergoing orthodontic treatment over a 12-week period: A single-center, randomized controlled clinical trial

“…Insufficient occlusal contacts, which can limit dental tipping unlike in the posterior teeth, could be the reason for the shift of this protrusion through the anterior region. 22 In our study, the mean values for the intercanine arch perimeter were higher in the CuNiTi group than in the NiTi group ( p < 0.01) from the second week. The covariates were adjusted for initial values of all examined parameters.…”

“… 24 Some studies have suggested an increase in arch perimeter after nonextraction orthodontic treatment in patients with Class I malocclusion. 22 24 …”

“…Previous studies have reported increases in intercanine widths of between 0.54 and 1.96 mm. 22 24 25 However, studies have also reported that this increase in width was lost after the retention period. 25 This suggests that the risk of relapse, which could occur after treatment in both the groups, should be evaluated in further studies.…”

A Retrospective Study to Evaluate the Intra-Arch Dimensional Changes in Moderate Crowding Cases Treated Non Extraction with a Passive Self-Ligation Appliance.

“…More expansion in the premolars region can be because of lip bumper effect which minimizes the proclination of anterior teeth and allow more expansion in posterior region. Previous study also showed majority of transverse changes in the premolar areas in both upper and lower arches, with less expansion in the canine and molar region (16,17). While assessing maxillary arch depth, the study showed (Table 1) a decrease in arch depth which can be because of more of transverse expansion, which created space and helped in unraveling of crowding in upper anteriors and less proclination.…”

Are self-ligating brackets an advantageous alternative for non-extraction treatments?

“…The inter-molar distance also showed a widening but to a lesser degree. All the transverse measurements proved to be equally significant with the exception of the width between the maxillary second molars 28 .…”