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To determine if microetching the mandibular premolars and first molars prior to acid-etching reduced bracket failures during the first six months of orthodontic treatment.

To compare the clinical failure rates over six months of indirectly bonded brackets with and without methyl methacrylate monomer (MMM) conditioned custom bases.

To compare the effectiveness of a self-ligating (SL) porcelain bracket with a conventional porcelain (CP) bracket tied with ligatures for initial alignment in the upper arch, to compare the discomfort of both bracket – archwire combinations and to compare the times taken (both assisted and unassisted) to untie and ligate both bracket – archwire combinations.

Many techniques and appliances claim to reduce orthodontic treatment time, one of which is micro-vibration applied by the AcceleDent Aura appliance.

This second survey of Australian Society of Orthodontists members was conducted to assess their treatment preferences and compare with the results of the 2013 survey.

Aim: This survey of Australian orthodontists was conducted to assess treatment preferences.

Introduction: The aim of this study was to assess the rate of tooth movement and discomfort experienced by orthodontic patients using a vibrational appliance (Tooth Masseuse).

Objective: To compare the effectiveness of SmartClip brackets and conventional twin brackets for initial alignment of the lower arch.

Research involving the upper airway has assessed linear measurements of certain structures on the assumption that the landmarks involved can be reliably identified.

This study compared the retention rates of thermally-cured (TC) and light-cured (LC) custom bases attached to metal mini-diamond brackets and clear Spirit MB brackets, when used in indirect bonding procedures. The custom base comprised either the light-cured or thermally-cured material attached to the bracket base and prepared in the laboratory, the whole unit later being bonded to the natural teeth. Thirty consecutively treated patients had fixed appliances fitted in both arches, with Spirit MB brackets on the maxillary anterior teeth, and metal brackets on the maxillary posterior and all mandibular teeth. All brackets were bonded using either the LC or TC method. All procedures and treatment was by the same operator, using identical techniques. Observation was for six months. All bonding failures were recorded. The results indicated no significant differences in the retention rates of either of the custom-base materials when used with metal brackets. However, the Spirit MB brackets exhibited a significantly higher bonding failure rate when a TC custom base was used. It was therefore concluded that either material could be used in the indirect bonding of metal brackets, and that LC custom bases should be used in the indirect bonding of Spirit MB brackets.

Aim: To compare the clinical failure rates aver six months of indirectly banded brackets with and without methyl methacrylate monomer (MMM) conditioned custom bases. Methods: Thirty-six consecutive patients satisfying the selection criteria were randomly assigned to two groups in a split-mouth study design. In Group 1, the maxillary right and mandibular left quadrants were indirectly bonded after the custom bases had been conditioned with MMM. The brackets bonded to the teeth in the contralateral quadrants were not conditioned. In Group 2, the custom bases on the brackets indirectly bonded to the teeth in the maxillary left and mandibular right quadrants were conditioned and the brackets in the contralateral quadrants were not conditioned. Over the 6-month observation period all loose brackets were recorded, and the data were compared with a Wilcoxon signed ranks test. Results: Of the 828 brackets placed, six with the MMM conditioning came loose (1.4 per cent Failed) compared with five in the Control group (1.2 per cent failed). The difference was not statistically significant (p = 0.74). Conclusion: These results indicate that conditioning custom bases with methyl methacrylate monomer is an unnecessary step when indirectly bonding brackets. [ABSTRACT FROM AUTHOR]

Objective: To compare the effectiveness of a self-ligating (SL) porcelain bracket with a conventional porcelain (CP) bracket tied with ligatures for initial alignment in the upper arch, to compare the discomfort of both bracket - archwire combinations and to compare the times taken (both assisted and unassisted) to untie and ligate both bracket - archwire combinations. Methods: Sixty nonextraction patients were randomly assigned to either a group with CP brackets on the upper six anterior teeth and conventional metal brackets on the premolars and first molars, or a group with SL porcelain brackets on the anterior teeth and SL metal brackets on the posterior teeth. The CP brackets were tied with coated ligatures. The irregularity index was measured at the start of treatment and at the first recall 10.7 weeks later. Discomfort was recorded over the first week with a Likert scale and the times to untie and ligate the six anterior porcelain brackets (assisted and unassisted) were recorded. Results: There were no differences in irregularities at the start of treatment (p = 0.91) or 10.7 weeks later (p = 0.12). No significant difference in discomfort was found between the bracket types (p = 0.90). The porcelain SL brackets were significantly faster (p < 0.001) to untie and ligate than the CP brackets with ligatures. Conclusion: Porcelain SL brackets were faster to untie and ligate by 22 seconds per bracket, but there were no significant differences in the alignment achieved or discomfort experienced. [ABSTRACT FROM AUTHOR]

Aim: To determine if microetching the mandibular premolars and first molars prior to acid-etching reduced bracket failures during the first six months of orthodontic treatment. Methods: Sixty four patients with 384 mandibular first molar and premolar brackets were used in a split-mouth study design. In each patient the teeth on one side were acid-etched and the contralateral teeth were microetched prior to acid-etching. The microetched side was alternated in successive patients. The brackets were indirecl bonded to the teeth on both sides. First time bracket failures were recorded over a 6-month period. Results: Two brackets (1 per cent) came loose on the microetched enamel side and four brackets (2.1 per cent) failed on the conventionally acid-etched side. This difference was not clinically or statistically significant (p = 0.41 ). Conclusion: The addition of microetching prior 10 acid-etching does not result in fewer bracket failures during the first six months of treatment. [ABSTRACT FROM AUTHOR]

The article presents abstracts on topics related to orthodontics which include "Spontaneous Third-Molar Eruption After Second-Molar Extraction in Orthodontic Patients," "Periodontal Status of Mandibular Central Incisors After Orthodontic Proclination in Adults" and "Factors Affecting the Clinical Success of Screw Implants Used as Orthodontic Anchorage."

A letter to the editor commenting on the article "Effects of adenoidectomy and changed mode of breathing on incisor and molar dentoalveolar heights and anterior face heights," by D. Mahony, A. Karsten, and S. Linder-Aronson is presented in one of the previous issues.