Three-dimensional measurement of tooth inclination: A longitudinal study.

Background: New tools have been introduced for tooth inclination measurement and assessment of its changes over time. This study aimed to measure the change in inclination of teeth after the periods of 2 and 4 years in adolescents with normal occlusion using three-dimensional (3D) software.

Materials And Methods: This retrospective longitudinal study was conducted on 54 pairs of dental casts of 24 adolescents between 9 and 13 years of age with normal occlusion.

Quality of Life Within Three Months After Stroke: A Study in the City of Arak, Iran.

Introduction: The impact of stroke on quality of life (QoL) may be different in diverse societies because of varying availability and accessibility of health and social care services provided in various settings. The purpose of the present study was to evaluate changes in patients' QoL within three months after stroke and to address the research question; "What factors influence QoL after stroke in Iranian population?"

Methods: A total number of 172 patients admitted to the Stroke Unit of Amiralmomenin Hospital in the city of Arak, Iran, were recruited in this study. The Stroke Impact Scale (SIS-16) was used at three different time-points to evaluate post-stroke QoL.

Agreement of the clinician's choice of archwire selection on conventional and virtual models.

Objectives: To compare archwire selection on dental casts with archwire selection using a three-dimensional (3D) software program (OrthoAid) and assess agreement between clinicians.

Materials And Methods: The best-fitting archwires were selected for dental casts of 100 patients with malocclusion using two approaches by three orthodontists. The first method was to visually determine the fitness of five preformed nickel titanium archwires to the arch form on a dental cast (subjective method).

Long-term outcomes of pulpotomy in permanent teeth with irreversible pulpitis: A multi-center randomized controlled trial.

Purpose: To compare success rates of full pulpotomy (FP) with two endodontic biomaterials on symptomatic vital teeth with closed apices in the presence of apical periodontitis.

Methods: In this multicenter controlled clinical trial, 412 volunteers met the inclusion criteria; they were all randomly allocated to either FP/ProRoot mineral trioxide aggregate (MTA) or FP/calcium enriched mixture (CEM) group. The subjects were followed up for 2 and 5 years to evaluate and compare the treatment outcomes.

A comparison of the effect of the active release and muscle energy techniques on the latent trigger points of the upper trapezius.

Background/aim: The increasing use of computer in daily life has brought about numerous musculoskeletal problems. Impairments in the head, neck and shoulders are more common compared with the other parts of the body. The aim of this study was to compare the effect of two manual treatments in two separate groups, i.

Color stability of mineral trioxide aggregate and calcium enriched mixture cement.

Aim: To assess the effect of light irradiation and different immersion media on discoloration of white mineral trioxide aggregate (WMTA) and calcium enriched mixture (CEM) cement at different time intervals.

Methods: Enamel sections of 12 teeth were removed and six cavities were prepared in each tooth. The cavities were filled randomly either with WMTA or CEM and covered with transparent sealant.

Effect of Bonding Application Time on Bond Strength of Composite Resin to Glass Ionomer Cement.

Objectives: This experimental study evaluated the effect of bonding application time on the microshear bond strength of composite resin to different types of glass ionomer cements (GICs).

Materials And Methods: One-hundred and sixty specimens (two conventional and two resin-modified GICs) were prepared and divided into 16 groups. The surface of all specimens was prepared using two different bonding systems (Frog and Stea) at three different times.

Comparison of the Rey Auditory Verbal Learning Test (RAVLT) and Digit Test among Typically Achieving and Gifted Students.

Objective: In this study, different kinds of memory were evaluated using Rey Auditory Verbal Learning (RAVLT) test and were compared between two groups of typical and gifted students using Digit Span test. Finally, we determined if working memory interfered with scores in different Rey stages or not.

Material & Methods: This study was conducted in Tehran City, Iran in 2013.

Evaluation of diagnostic accuracy and dimensional measurements by using CBCT in mandibular first molars.

Background: This study aimed to assess the diagnostic accuracy of cone beam computed tomography (CBCT) and quantitatively evaluate the morphology of mandibular first molars using CBCT.

Material And Methods: Twenty-four double-rooted mandibular first molars were evaluated by NewTom VGi CBCT. The distance from the furcation and apex to the cementoenamel junction (CEJ), diameter and thickness of canal walls, the buccolingual (BL) to mesiodistal (MD) ratio (ΔD), prevalence of oval canals at different sections and taper of the canals were all determined.

Comparison of CT-Number and Gray Scale Value of Different Dental Materials and Hard Tissues in CT and CBCT.

Introduction: Computed tomography (CT) and cone-beam CT (CBCT) are valuable diagnostic aids for many clinical applications. This study was designed to compare the gray scale value (GSV) and Hounsfield unit (HU) of selected dental materials and various hard tissues using CT or CBCT.

Methods And Materials: Three samples of all test materials including amalgam (AM), composite resin (CR), glass ionomer (GI), zinc-oxide eugenol (ZOE), calcium-enriched mixture (CEM) cement, AH-26 root canal sealer (AH-26), gutta-percha (GP), Coltosol (Col), Dycal (DL), mineral trioxide aggregate (MTA), zinc phosphate (ZP), and polycarbonate cement (PC) were prepared and scanned together with samples of bone, dentin and enamel using two CBCT devices, Scanora 3D (S3D) and NewTom VGi (NTV) and a spiral CT (SCT) scanner (Somatom Emotion 16 multislice spiral CT);.

Predicting mandibular growth increment on the basis of cervical vertebral dimensions in Iranian girls.

Background: The purpose of this longitudinal study was to establish an equation to predict incremental mandibular length on the basis of the analysis of the cervical vertebrae on a single cephalometric radiograph and to compare the predictive accuracy with the method by Mito et al.

Methods: Data consist of a group of 33 Iranian girls, 9 to 11 years old with two lateral cephalometric radiographs taken at a 24-month interval. For each individual, on the lateral cephalometric radiographs, points and lines for the description of the morphologic characteristics of the third and fourth cervical vertebral bodies were traced and measured.

A study of growth failure and its related factors in children from 0 to 2 years in Tehran, Iran.

In this study, we aimed to estimate the prevalence of growth failure and identify the risk factors for this health problem in infants under two years old in Tehran, Iran. Using a cluster sampling method, 2182 infants' health files were randomly selected from eight health centers in Tehran. Growth failure was defined as a decrease in a child's weight (minimum 50 grams) at each attendance compared to the previous evaluation.

A clinical and histologic evaluation of gingival fibroblasts seeding on a chitosan-based scaffold and its effect on the width of keratinized gingiva in dogs.

Background: Finding biocompatible matrix materials capable of enhancing the procedures of gingival augmentation is a major concern in periodontal research. This has prompted the investigation of a safe grafting technique by means of synthetic or natural polymers. The objective of this study is to examine the effect of a gingival fibroblast cultured on a naturally derived (i.

The accuracy of a 3-D laser scanner for crown width measurements.

Background: Virtual dental casts have been recently introduced to orthodontics. The problem of capturing the shapes of teeth on study casts may be complicated by the presence of undercut areas and deep grooves.

Aims: This study aimed to develop a 3-D laser scanner and associated software, and to evaluate the reproducibility and validity of mesiodistal crown width measurements based on slice distinction.

Orthodontic treatment need in 14-16 year-old Tehran high school students.

Aim: To assess orthodontic treatment need in a Tehran high school population.

Methods: The Dental Health Component (DHC) of the Index of Orthodontic Treatment Need (IOTN) was used by 21 trained examiners to estimate the orthodontic treatment need in 5200 Tehran high school students. The children, between 14 and 16 years of age, attended 84 high schools in 21 educational areas in Tehran and the neighbouring city of Rey.

Iranian version of childbirth self-efficacy inventory.

Aim: The primary purpose of this study was to translate the Lowe's Childbirth Self-Efficacy Inventory to Persian and to examine the psychometric properties of its Iranian version.

Background: Self-efficacy for childbirth has been found to be a factor in a woman's decision about her choice of delivery and an essential key in coping with labour pain. Creating a valid and reliable questionnaire is necessary to gain a better understanding of the emotional preparation of pregnant women.

Assessment of agreement in measuring orthodontic treatment need with the modified DHC.

Aims: To determine senior dental students' validity, reliability and category distinguishability when using the Dental Health Component (DHC) of the Index of Orthodontic Treatment Need (IOTN).

Methods: Randomly selected pretreatment dental casts of 42 patients were used. The casts were assessed by six senior dental students after a 4-day training period and three orthodontists using the modified Dental Health Component (DHC) of the Index of Orthodontic Treatment Need (IOTN).

The reliability and distinguishability of ultrasound diagnosis of ovarian masses.

Background: For any radiologist, intra-observer agreement in observing and decision making in diagnosis of any disease is of great importance, and so is observing and reading ultrasound pictures of ovarian masses and distinguishing amongst their categories.

Aims: In this study, the reliability and consistency of ultrasound diagnosis of ovarian tumors have been evaluated.

Settings And Design: Two experienced and three less experienced radiologists assessed ultrasounds of 40 patients of Mirza Koochak Khan Hospital in Tehran, Iran, in 2005.