Influence of second-order bracket-archwire misalignments on loads generated during third-order archwire rotation in orthodontic treatment

Romanyk, Dan L.; George, Andrew; Li, Yin; Heo, Giseon; Carey, Jason P.; Major, Paul W.

doi:10.2319/052815-365.1

Cited by 5 publications

(1 citation statement)

References 14 publications

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“…Thirdly, skeletal class II tendency of the subjects in the study favoured dental compensation, 30 resulting in less strict torque control in the patients. Moreover, clinicians can twist the wires before insertion in case of loss of torque, which may fundamentally influence the torque of incisors 31 . Furthermore, this study was conducted in a university dental hospital, and the patients were not treated by one single clinician, which may influence the outcome of torque expression in the present study.…”

Section: Discussionmentioning

confidence: 99%

Torque expression by active and passive self‐ligating brackets in patients with four premolar extractions: A retrospective study

Ren

Zhao

et al. 2020

Orthod Craniofacial Res

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Objective: Appropriate torque expression contributes to ideal treatment outcomes both clinically and aesthetically. Whether active and passive self-ligating brackets (SLBs) have different torque-control capability in vivo has never been reported. The purpose of present study was to explore whether there was difference in torque expression in active and passive SLBs. Setting and Sample Population: In this retrospective study, 225 patients with four first premolar extractions were enrolled. For each patient, the digital lateral cephalometric radiographs were taken before and after treatment. Materials and Methods: The study consisted of 2 groups: 111 subjects were treated with passive SLBs (Damon Q, Ormco) and 114 subjects with active SLBs (Empower 2, American Orthodontics). Measurements to determine skeletal changes and incisor inclination were obtained from cephalometric tracings using Dolphin software (version 11.8, USA). Comparisons in both groups and intergroups were compared using t tests and chi-square test. Results: Significant differences in the variation of U1-SN(°), U1-NA(°), L1-NB(°) and L1-FH(°) were found between two groups. More labially inclined maxillary incisors were found in active SLB group, while more labially inclined mandibular incisors were observed in passive SLB group. Conclusions: With the present prescription set in the two brackets, active SLBs achieved more proclined maxillary incisors and retroclined mandibular incisors. Clinicians should take torque expression of brackets into consideration during orthodontic treatment.

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Section: Discussionmentioning

confidence: 99%

Torque expression by active and passive self‐ligating brackets in patients with four premolar extractions: A retrospective study

Ren

Zhao

et al. 2020

Orthod Craniofacial Res

View full text Add to dashboard Cite

show abstract

A new orthodontic force system for moment control utilizing the flexibility of common wires: Evaluation of the effect of contractile force and hook length

Lai

Midorikawa

Kanno

et al. 2018

Journal of the Formosan Medical Association

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Research paper: The three-dimensional mechanical response of orthodontic archwires and brackets in vitro during simulated orthodontic torque

Tran

Nobes

Major

et al. 2021

Journal of the Mechanical Behavior of Biomedical Materials

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Influence of second-order bracket-archwire misalignments on loads generated during third-order archwire rotation in orthodontic treatment

Abstract: The introduction of a second-order misalignment during third-order torque simulation resulted in statistically significant differences in both second- and third-order torque response; however, the former is arguably clinically insignificant.

Cited by 5 publications

References 14 publications

Torque expression by active and passive self‐ligating brackets in patients with four premolar extractions: A retrospective study

Torque expression by active and passive self‐ligating brackets in patients with four premolar extractions: A retrospective study

A new orthodontic force system for moment control utilizing the flexibility of common wires: Evaluation of the effect of contractile force and hook length

Research paper: The three-dimensional mechanical response of orthodontic archwires and brackets in vitro during simulated orthodontic torque

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