Dentoalveolar mandibular changes with self-ligating versus conventional bracket systems: A CBCT and dental cast study

Almeida, Márcio Rodrigues de; Futagami, Cristina; Conti, Ana Cláudia de Castro Ferreira; Oltramari-Navarro, Paula Vanessa Pedron; Navarro, Ricardo de Lima

doi:10.1590/2176-9451.20.3.050-057.oar

Cited by 15 publications

(25 citation statements)

References 23 publications

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“…Studies evaluating the changes in inter-first premolar width in fixed orthodontic treatment have shown that the results obtained vary between 1.46 and 3.22 mm because of the differences in materials and methodology. 24 28 In contrast to the results of our study, Fleming et al 24 found no statistically significant increase in inter-first and inter-second premolar width changes before and after fixed orthodontic treatment at the leveling stage. The reason for this difference could be the difference in the design materials and methods.…”

Section: Discussioncontrasting

confidence: 97%

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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

2018

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ObjectiveThe aim of this trial was to compare the alignment efficiency and intermaxillary arch dimension changes of nickel-titanium (NiTi) or copper-nickel-titanium (CuNiTi) round archwires with increasing diameters applied sequentially to the mandibular arch.MethodsThe initial alignment phase of fixed orthodontic treatment with NiTi or CuNiTi round archwires was studied in a randomly allocated sample of 66 patients. The NiTi group comprised 26 women, 10 men, and the CuNiTi (27℃) group comprised 20 women, 10 men. The eligibility criteria were as follows: anterior mandibular crowding of minimum 6 mm according to Little's Irregularity Index (LII), treatment requiring no extraction of premolars, 12 to 18 years of age, permanent dentition, skeletal and dental Class I malocclusion. The main outcome measure was the alignment of the mandibular anterior dentition; the secondary outcome measure was the change in mandibular dental arch dimensions during 12 weeks. Simple randomization (allocation ratio 1:1) was used in this single-blind study. LII and mandibular arch dimensions were measured on three-dimensional digital dental models at 2-week intervals.ResultsNo statistically significant difference was observed between NiTi and CuNiTi according to LII (p > 0.05). Intercanine and intermolar arch perimeters increased in the CuNiTi group (p < 0.001). Inter-first premolar width showed a statistically significant interaction in week × diameter × application (p < 0.05).ConclusionsThe effects of NiTi and CuNiTi round archwires were similar in terms of their alignment efficiency. However, the intercanine and intermolar arch perimeters, and the inter-first premolar width changes differed between groups.

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Section: Discussioncontrasting

confidence: 97%

“…Additionally, alveolar buccal changes do not follow dental expansion. 28 Since neither group showed changes in alveolar widths, this is considered a favorable factor for retention. 30…”

Section: Discussionmentioning

confidence: 98%

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

2018

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“…Some studies (Table 6) have investigated variables in the transverse and sagittal plane, but none of them used a sample as large as that of the present study. Other research [7][8][9] in which SL brackets without oversized arches were used showed fewer increases in the transverse plane than increases achieved with oversized wires, possibly suggesting the effect of the shape of the wires used in the technique. In this regard, other authors 6,10 have claimed that the changes are due to the arch shape, and not to the type of bracket.…”

Section: Discussion Of Resultsmentioning

confidence: 84%

“…6 In the second study, measurements in both the conventional and self-ligating type were also performed with CBCT; however, the sample in that study was smaller than the sample used in the present paper, and the measurements were only taken at the beginning of the treatment and at seven months post-treatment. 7…”

Section: Discussion Of the Study Methodologymentioning

confidence: 99%

Comparison of changes in the dental transverse and sagittal planes between patients treated with self-ligating and with conventional brackets

Moyano

Montagut²,

Perera³

et al. 2020

Dental Press J. Orthod.

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Introduction: Several advantages have been established regarding the efficiency of self-ligating brackets (SL). In spite of some controversy surrounding this question in the literature, clinical results confirm that “arch development” requires fewer extractions. Objective: The objective of this study was to compare changes in the transverse and sagittal planes in patients treated with conventional ligating brackets (CL)as well as in patients treated with SL brackets and oversized arches. Methods: A sample was selected from a pool of 300 consecutive cases treated by a single clinician: 51 patients with SL brackets and oversized wires, and 55 with CL brackets. These two groups were compared with a control group of 20 patients. All plaster models were scanned and dental landmarks were measured to identify changes from commencement (T0) to conclusion (T1) of treatment. Lateral cephalograms were analyzed for changes in the lower incisor (IMPA) and the first lower molar distal angulation (MAng). Intraoperator reliability was tested with linear regression analysis. To assure all groups were comparable at T0, an ANOVA test with a 95%confidence interval (CI) was performed for all values. To assess changes from T0 to T1 in all groups, a Student’s t-test with 95% CI was used. Finally, results from the three groups were compared using an ANOVA-test (95% CI) and a post-hoc test. Results: Increases in all the transverse variables were recorded in the two groups treated (SL and CL), except for the lower intercanine distance in the SL group. IMPA difference from T0 to T1 was higher in the CL group, and molar distal angulation (MAng) took place in the SL group. Conclusions: Self-ligating brackets with oversized arches and conventional ligating brackets showed increases in all variables in the transverse plane, except for the SL group at the mandibular intercanine distance. In comparison with the CL group, fewer different IMPA values were observed in the SL group, in which distal molar angulation occurred.

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“…4,5 However, these concepts are still controversial, since there is evidence showing no difference in the expansion of the dental arch and transversal bone thickness after orthodontic treatment by comparing the performance of conventional brackets with self-ligating brackets. 6,7 Furthermore, considerable and uncontrolled dental tipping, up to ∼26 degrees, were reported during the expansion of dental arches with the use of selfligating brackets.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of lower anterior dental changes in patients treated with self-ligating brackets

Shibasaki

Silva

Fuziy

et al. 2019

Journal of Oral Biology and Craniofacial Research

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The aim of this study was to evaluate and compare changes in linear distance and inclination of lower incisors and canines and intercanine distance after a 30 months orthodontic treatment with self-ligating appliances. Seven patients were treated orthodontically with a Roth prescription passive self-ligating bracket. To perform the measurements and comparisons, CBCT scans were taken before the start of the orthodontic treatment (T 1) and after a period of 30 months treatment (T 2). The following measurements were performed: (1) the lower incisors and canines inclination in relation to the mandibular plane, (2) intercanine linear distance in millimeters and (3) linear distance in millimeters of the incisal and apical part of lower anterior teeth to a plane (POGM) passing through pogonion point and perpendicular to the mandibular plane. No significant difference were observed between T 1 and T 2 for canine inclination (p = 0.835), incisors inclination (p = 0.149), canine incisal distance to POGM (p = 0.423) and incisors incisal distance to POGM (p = 0.966), however canine apical distance (p = 0.049) and incisors apical distance (p = 0.002) to POGM was lower at T 1 than at T 2. The intercanine distance was significantly lower (p = 0.022) at T 1 when compared to T 2. The use of passive self-ligating brackets in orthodontic treatment to solve 4 mm tooth crowding were able to produce dental arch expansion by bodily tooth movement.

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Dentoalveolar mandibular changes with self-ligating versus conventional bracket systems: A CBCT and dental cast study

Cited by 15 publications

References 23 publications

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

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

Comparison of changes in the dental transverse and sagittal planes between patients treated with self-ligating and with conventional brackets

Evaluation of lower anterior dental changes in patients treated with self-ligating brackets

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