Cross-sectional studies
A cross-sectional study is an observational study in which the exposure and the outcome are determined at the same time point for each study participant. Cross-sectional studies comprise the simplest…
Treatment effects of a modified palatal anchorage plate for distalization evaluated with cone-beam computed tomography
Introduction The purpose of this study was to evaluate the treatment effects of maxillary posterior tooth distalization performed by a modified palatal anchorage plate appliance with cephalograms derived from cone-beam…
How to write an expert opinion letter
A reader sent me a copy of an expert opinion letter that he wrote for an insurance company. I thought it was so well written that I want to share…
Time reduction of light curing: Influence on conversion degree and microhardness of orthodontic composites
Introduction The aim of this study was to assess the influence of curing time and power on the degree of conversion and surface microhardness of 3 orthodontic composites. Methods One…
Effectiveness of 3 methods of anchorage reinforcement for maximum anchorage in adolescents: A 3-arm multicenter randomized clinical trial
Introduction The objective of this 3-arm parallel randomized clinical trial was to compare the effectiveness of temporary anchorage devices (TADs), Nance button palatal arches, and headgear for anchorage supplementation in…
Dentoskeletal effects of 3 maxillary expanders in patients with clefts: A cone-beam computed tomography study
Introduction The purpose of this study was to evaluate the skeletal and dental changes in the maxillae of patients with clefts treated with 3 expanders: hyrax, fan-type, and inverted mini-hyrax…
Overjet, overbite, and anterior crowding relapses in extraction and nonextraction patients, and their correlations
Introduction In this study, we aimed to compare the relapse of maxillary and mandibular anterior crowding, overjet, and overbite 5 years after treatment in subjects with Class I and Class…
Compensatory orthodontic treatment for maxillary deficiency: A 4-year follow-up
In this article, we report the orthodontic treatment of a boy (age 12 years 9 months) who had a midface deficiency, a concave facial profile with maxillary retrusion, a complete crossbite (anterior…
Anterior cranial-base time-related changes: A systematic review
Introduction The anterior cranial base has long been considered a stable reference structure for superimposing radiographs. However, some studies have questioned its stability. Therefore, the purposes of this systematic review…
Motivation and compliance with intraoral elastics
Introduction Intraoral elastics are commonly used in orthodontics and require regular changing to be effective. Unfortunately, poor compliance with elastics is often encountered, especially in adolescents. Intention for an action…
Residents’ journal review
Are mutations in parathyroid hormone receptor linked to undererupted molars associated with osteoarthritis? Frazier-Bowers SA, Hendricks HM, Wright JT, Lee J, Long K, Dibble CF, et al. Novel mutations in PTH1R…
Digital tooth-based superimposition method for assessment of alveolar bone levels on cone-beam computed tomography images
Introduction Cone-beam computed tomography images have been previously used for evaluation of alveolar bone levels around teeth before, during, and after orthodontic treatment. Protocols described in the literature have been…
An efficient biomechanical approach for the management of an impacted maxillary central incisor
Treatment of an impacted maxillary central incisor poses a unique challenge to the orthodontist because of its position within the esthetic zone, requiring careful management of the soft tissues and…
Authors’ response
Thank you for the opportunity to reply to Dr Rakhshan’s letter regarding the apparent statistical “issues and ambiguities” with our research. 1. The estimation of power for this study was…
Nothing but the truth…
Eric returns for his monthly adjustment, and his oral hygiene is just as poor as ever. As you retract his lips and observe the plaque accumulation that resembles yellow cottage…
Statistical issues and ambiguities in a recent report on condylar position
I read with interest the article of Kandasamy et al (Kandasamy S, Boeddinghaus R, Kruger E. Condylar position assessed by magnetic resonance imaging after various bite position registrations. Am J Orthod…
Bone stress and strain after use of a miniplate for molar protraction and uprighting: A 3-dimensional finite element analysis
Introduction The aim of this study was to use the finite element method to evaluate the distribution of stresses and strains on the local bone tissue adjacent to the miniplate…
Interdisciplinary treatment for an adult with a unilateral cleft lip and palate
A young man, age 18 years 4 months, with a concave profile, a skeletal maxillary deficiency, and a severe alveolar cleft with an unesthetic appearance of the maxillary anterior teeth was referred…
Biomechanical effectiveness of cortical bone thickness on orthodontic microimplant stability: An evaluation based on the load share between cortical and cancellous bone
Introduction The aim of this study was to determine the appropriate range of cortical bone thickness (CBT) for supporting an orthodontic microimplant. Methods Analysis of an orthodontic microimplant subjected to…
