Accuracy and reproducibility of dental measurements on tomographic digital models: a systematic review and meta-analysis.

Objectives: The aim of this systematic review with meta-analysis was to assess the accuracy and reproducibility of dental measurements obtained from digital study models generated from CBCT compared with those acquired from plaster models.

Methods: The electronic databases Cochrane Library, Medline (via PubMed), Scopus, VHL, Web of Science, and System for Information on Grey Literature in Europe were screened to identify articles from 1998 until February 2016. The inclusion criteria were: prospective and retrospective clinical trials in humans; validation and/or comparison articles of dental study models obtained from CBCT and plaster models; and articles that used dental linear measurements as an assessment tool.

Reliability and reproducibility of three-dimensional cephalometric landmarks using CBCT: a systematic review.

Objective: The aim of this study was to review the reliability and reproducibility of 3D-CBCT (cone beam computed tomography) cephalometric landmark identification.

Methods: Electronic databases (Pubmed, Scopus, Web of Science) were searched for papers published from 1998 to October 2014. Specific strategies were developed for each database, with the guidance of a librarian.

A double-blind, randomized clinical trial assessing the effects of a single dose of preemptive anti-inflammatory treatment in orthodontic pain.

Objective: Strategies about how to mitigate or prevent the appearance of pain associated with orthodontic treatment are poorly defined. Herein we conduct a prospective, double-blind, randomized controlled clinical trial assessing the effects of a single dose of anti-inflammatory medication to preemptively treat pain following the placement of orthodontic separating elastics.

Materials And Methods: Fifty one participants were randomly selected and divided into three groups: (a) 17 patients took placebo one hour prior to the elastic separator placement; (b) 17 patients took 400 mg lumiracoxib one hour prior to the elastic separator placement; and (c) 17 patients didn't take anything prior to the procedure.

Display of the incisors as functions of age and gender.

Background: Older subjects usually show less of their upper incisors and more of their lower incisors than younger subjects.

Objectives: To determine how much of the upper and lower central incisor crowns are visible in Brazilian subjects with their lips at rest.

Methods: The subjects were 240 white Brazilian subjects divided into four age groups: Group 1, 12 to 15 years of age; Group 2, 20 to 30 years of age; Group 3, 31 to 50 years of age and Group 4, 51 years of age and older.

In vitro evaluation of frictional forces between archwires and ceramic brackets.

The aim of this study was to evaluate the frictional force between orthodontic brackets and archwires. The differences in magnitude of the frictional forces generated by ceramic brackets, ceramic brackets with metal reinforced slot, and stainless steel brackets in combination with stainless steel, nickel-titanium, and beta-titanium orthodontic archwires were investigated. Brackets and wire were tested with tip angulations of 0 degrees and 10 degrees.