Perception of discrepancy in the upper midline position in conjunction with the gingival display according to various occupations in Iran.

Objective: This study evaluated the influence of various gingival displays on the esthetic perception in the presence of upper dental midline discrepancy.

Methods: A smiling image of a male subject was altered digitally to produce five image series: normal smile (series A), decreased tooth show (series B), increased gingival show (series C), maxillary cant (series D), and asymmetric upper lip elevation (series E). In each image series, the midline was deviated to the right and left incrementally.

Effect of 8% arginine toothpaste on Streptococcus mutans in patients undergoing fixed orthodontic treatment: randomized controlled trial.

Objective: To assess the effect of toothpaste containing 8% arginine on Streptococcus mutans (S. mutans) in dental plaque around orthodontic brackets, and to draw a comparison with a regular fluoride toothpaste.

Trial Design: A single-center, parallel-arm, triple-blind, randomized controlled trial was conducted.

Preventive practice, vaccine acceptance, and knowledge toward coronavirus disease-19: An online cross-sectional questionnaire-based report in Iranian dentists.

Background: The coronavirus disease (COVID) is predicted to cause serious mental health problems among healthcare providers (HCPs) especially dentists. Also understanding the influencing factors of the acceptance of COVID-19 vaccination among HCPs are important aspects in the design of effective strategies to improve the vaccine coverage rate. Therefore, this study aimed to assess the knowledge, vaccination acceptance, fear, and obsession, as well as the preventive practice behaviors of Iranian dentists and dental students in late 2020 toward COVID-19.

Er,Cr:YSGG Laser as a Means of Orthodontic Adhesive Removal: Myth or Reality?

This study aimed to compare the effect of Er,Cr:YSGG laser with a tungsten carbide bur in orthodontic finishing on the enamel surface roughness and the heat generated in the pulp chamber. Before bonding, of 125 intact extracted premolar teeth, 15 teeth were randomly assigned to the control group. Of the remaining 110 bonded teeth, 50 were used to determine the laser parameters, and 60 were included in the main study.

Evaluation of the preventive effect of two concentrations of xylitol varnish versus fluoride varnish on enamel demineralization around orthodontic brackets: a randomized controlled trial.

Background: The highly prevalent white spot lesions around orthodontic brackets necessitate introducing preventive materials without relying on patient compliance.

Objective: To evaluate the antidemineralizing effect of two concentrations of xylitol varnish.

Trial Design: Triple-blind, four-arm, parallel-group, single-center, randomized controlled clinical trial.

Are individuals with orofacial pain more prone to psychological distress during the COVID-19 pandemic?

Background: It is of utmost importance to identify and treat groups susceptible to psychological problems during the coronavirus disease 2019 (COVID-19) pandemic.

Objectives: This study aimed to compare the psychological status between the general population and subjects with orofacial pain (OFP) during the COVID-19 pandemic.

Material And Methods: A total of 509 young adults were recruited based on the inclusion and exclusion criteria, using the convenient sampling approach.

Evaluation of the Preventive Effect of Composites Containing Silver and TiO Nanoparticles on Demineralization around Orthodontic Brackets.

Aim: The aim of this study was to investigate the antidemineralization effect of composites containing silver and titanium dioxide (TiO) nanoparticles used for bonding brackets to tooth specimens.

Materials And Methods: A total of 75 freshly extracted teeth were etched and primed and then randomly assigned to three adhesive groups: (1) conventional orthodontic adhesive, (2) conventional adhesive mixed with TiO nanoparticles, and (3) conventional adhesive mixed with silver nanoparticles. In each group, brackets were bonded with the pertinent adhesive.

Evaluating the effect of clinical usage and autoclave sterilization on the load deflection properties of three different orthodontic wires: Ex-vivo study.

Objective: The aim of this study was to evaluate the effect of intraoral aging and sterilization on the physical properties of rectangular Nickel-Titanium (NiTi), Beta-Titanium and Cooper NiTi (Cu-NiTi) arch wires.

Methods: Three types of preformed 0.018×0.

The effects of the headgear therapy on the airway dimensions in patients with class II malocclusion: A systematic review.

Class II malocclusion may be caused by the maxillary protrusion or the mandibular retrusion. One treatment method is to use a headgear, which might affect the dimensions of the patient's airway. The aim of this study was to assess the effect of a headgear on the airway dimensions in class II malocclusion patients.

Effect of different surface treatment methods on the shear bond strength of orthodontic brackets to temporary crowns.

Introduction: The number of adult patients seeking orthodontic treatment has been consistently increasing. Since the placing of the final restoration must be postponed until the completion of the orthodontic treatment, provisional restoration is recommended for the duration of the orthodontic treatment. These surfaces have special chemical properties, which necessitate the orthodontists to prepare the bonding area with special measures.

Effect of different surface treatment on the shear bond strength of metal brackets to bleached and desensitized enamel.

Introduction: The aim of this study was to determine the effect of bleaching and desensitizing on shear bond strength (SBS) of metal brackets to enamel.

Methods: One hundred extracted human premolar were randomly assigned to 5 groups of 20. In the first group (control), no bleaching or desensitizing agent was used.

Evaluation of the effect of different surface conditioning methods on shear bond strength of metal brackets bonded to aged composite restorations.

Introduction: There are controversies regarding the most reliable conditioning method of the aged composite surface to ensure optimum bond strength. The purpose of this study was to evaluate the shear bond strength of metal brackets to microhybrid composite restorations after different surface preparation techniques.

Materials And Methods: A total of sixty microhybrid composite samples were prepared using upper right central incisor celluloid crown as a mold.

Assessment of the changes in alveolar bone quality after fixed orthodontic therapy: A trabecular structure analysis.

Tooth displacement changes the periodontium. The aim of orthodontic treatment is desired tooth movement with minimum side effects on the alveolar bone quality. The aim of the present study was to assess changes of alveolar trabeculation in children, young adults and adults and the two genders.

Esthetic evaluation of lip position in silhouette with respect to profile divergence.

Introduction: The aim of this study was to determine the preferred lip position in silhouette profiles with different amounts of divergence.

Methods: A normal profile was constructed based on normal values and was altered using software (Photoshop CS, version 8.0; Adobe Systems, San Jose, Calif) to produce a series of 15 profiles in 3 sets (straight, anterior, and posterior divergent).

The Effect of Four Surface Treatment Methods on the Shear Bond Strength of Metallic Brackets to the Fluorosed Enamel.

Statement Of The Problem: Some studies have reported the bond strength to be significantly lower in fluorotic enamels than the non-fluorosed.

Purpose: The purpose of this study was to evaluate the shear bond streongth of metallic brackets to non-fluorosed and fluorosed teeth after different enamel conditioning.

Materials And Method: A total of 176 freshly extracted human premolars (88 non-fluorosed and 88 fluorosed teeth) were used in this study for bonding the metallic brackets.

Comparison of the effects of preemptive acetaminophen, ibuprofen, and meloxicam on pain after separator placement: a randomized clinical trial.

Background: This study aims to evaluate and compare the effect of pre-procedural administration of acetaminophen, ibuprofen, and meloxicam in reducing pain after separator placement.

Methods: Three hundred twenty-one patients who needed orthodontic treatment and aged above 15 were randomly assigned to one of the three study groups: group A: 650 mg acetaminophen, group B: 400 mg ibuprofen, and group C: 7.5 mg meloxicam.

Esthetic evaluation of incisor inclination in smiling profiles with respect to mandibular position.

Introduction: The smile is a key facial expression, and a careful assessment of the facial profile in smiling is an essential part of a complete orthodontic diagnosis. The aim of this study was to determine the preferred maxillary incisor inclination in the smile profile with regard to different mandibular positions.

Methods: A smiling profile photograph of a man with normal facial profile features was altered digitally to obtain 3 different mandibular sagittal positions in 4-mm decrements or increments from -4 to +4 mm.

Evaluation of the effect of four surface conditioning methods on the shear bond strength of metal bracket to porcelain surface.

Objective: This study evaluated the effect of superpulse CO2 laser irradiation and deglazing of porcelain surfaces on the shear bond strength (SBS) of metal orthodontic brackets, and compared it with two conventional etching techniques.

Methods: Forty-eight Feldspathic porcelain fused to metal specimens embedded in cylindrical acrylic resin tubes were fabricated, and all the specimens were divided into four groups. In Group 1, the specimens were roughened with a diamond bur and etched with hydrofluoric acid (HFA) gel for 4 min.

Study skills and habits in Shiraz dental students; strengths and weaknesses.

Introduction: The dental students, the same as other students, during their academic courses are required to learn a wide range of scientific subjects. Obviously, choosing the inappropriate method of study leads to confuse and disenchantment of students and it causes wasting of their energy. The purpose of this study was to assess the existing strengths and weaknesses of the skills and study habits in Dental Students of Shiraz University of Medical Sciences in 2009-10.

Comparison of survival time between two types of orthodontic fixed retainer: a prospective randomized clinical trial.

Background: The aim of this prospective clinical study was to compare the mean durability and the failure rates of two types of orthodontic retainers.

Methods: Orthodontic patients (142) aged between 14 and 28 years were recruited in this study. The polyethylene woven ribbon (Ribbond, Seattle, WA, USA) retainer was compared with a 0.