Quantitative in-vitro evaluation of enamel surface roughness following two debonding procedures using laser scanning confocal microscope.

Background: The objective of the in vitro study was to evaluate the impact of two adhesive removal techniques on the surface roughness of the human enamel surface using laser scanning confocal microscopy (LSCM).

Methods: Forty healthy first upper molar teeth were included in this experiment (20 teeth per each group). T0 measurement of surface roughness parameter of the teeth were conducted using LSCM.

Advances and Challenges in Polymer-Based Scaffolds for Bone Tissue Engineering: A Path Towards Personalized Regenerative Medicine.

Polymers have become essential in advancing bone tissue engineering, providing adaptable bone healing and regeneration solutions. Their biocompatibility and biodegradability make them ideal candidates for creating scaffolds that mimic the body's natural extracellular matrix (ECM). However, significant challenges remain, including degradation by-products, insufficient mechanical strength, and suboptimal cellular interactions.

Impact of Dental Midline Shift on the Perception of Facial Attractiveness in Young Adults.

The aim of this study was to quantify the threshold of a dental midline shift that would compromise facial attractiveness and indicate a need for treatment from the points of view of laypeople and dental professionals. : Whole-face natural photographs of a male and a female model were digitally manipulated to create various degrees of upper and lower dental midline shifts through bodily movement of the upper or lower midlines as well as alteration of the axial inclination of the upper teeth. The samples were then assessed by two groups of observers (laypeople (LP) and dental professionals (DP)).

The role of vitamin D in outcomes of critical care in COVID-19 patients: evidence from an umbrella meta-analysis of interventional and observational studies.

Objectives: Several meta-analyses have suggested the beneficial effect of vitamin D on patients infected with severe acute respiratory syndrome coronavirus-2. This umbrella meta-analysis aims to evaluate influence of vitamin D supplementation on clinical outcomes and the mortality rate of COVID-19 patients.

Design: Present study was designed as an umbrella meta-analysis.

The effect of vitamin D2 supplementation on vitamin D levels in humans: A time and dose-response meta-analysis of randomized controlled trials.

Background: Inconsistencies exist regarding the influence of vitamin D2 (ergocalciferol) supplementation on serum vitamin D levels. These inconsistencies could be attributed to numerous factors, such as dosage, baseline vitamin D levels, and duration of intervention. Hence, this dose-response meta-analysis of randomized controlled trials was conducted to assess the efficacy of vitamin D2 supplementation on vitamin D levels.

Three-dimensional evaluation of mandibular lingula: Comparisons of skeletal angle classifications and growth patterns.

Objectives: This study aimed to evaluate the position of the mandibular lingula (ML) in adult patients (aged between 18 and 35 years old) with different skeletal and growth patterns using cone-beam computed tomography (CBCT).

Design: Cross-sectional.

Setting: Dentistry department of University.

Are Virtually Designed 3D Printed Surgical Splints Accurate Enough for Maxillary Reposition as an Intermediate Orthognathic Surgical Guide.

Background And Aim: The accuracy of the virtually-designed 3D-printed surgical splints requires investigation for the practical use of surgical plan in the operating room. This study aimed to compare the validity of the 3D-printed and the conventional intermediate splints and evaluate the outcomes after the surgical application of the 3D-printed splint compared with the predicted values.

Methods: In this study, ten patients with dentofacial deformity were recruited.

Posttreatment stability following therapy using passive self-ligating brackets: extraction vs. nonextraction.

Purpose: This study aimed to evaluate the effects of lower premolar extraction on posttreatment stability one year following fixed orthodontic treatment with passive self-ligating brackets (Damon system, Ormco, Orange, CA, USA).

Methods: All patients were treated with fixed orthodontic appliances using passive self-ligating brackets (Damon). For retention, removable Hawley retainers were used.

Reliability of qualitative and quantitative assessment of adhesive remnants after debonding of ceramic brackets bonded with Transbond™XT on human molar teeth: An in vitro study.

Objective: To test the hypothesis that there are any differences between qualitative and quantitative methods of adhesive remnants index (ARI) scores on the buccal surfaces of the upper molar.

Materials And Methods: The study included 34 upper first human molars. After etching for 20seconds by using 35% orthophosphoric acid (Ultra-Etch, Ultradent Products Inc.

Two different designs of mini-screw assisted maxillary expanders, using FEM to analyse stress distribution in craniofacial structures and anchor teeth.

Objective: The objective of this study was to analyse the displacement, strain, and stress distribution of various craniofacial structures after applying maxillary expansion with two different bone-borne Haas-inspired miniscrew-assisted maxillary expander (BB HIMAME) and bone-tooth-borne miniscrew-assisted rapid palatal expander (BTB MARPE) using three-dimensional finite element analysis (3D FEA).

Material And Methods: two expanders including bone-anchored maxillary expander and bone tooth-borne were designed to simulate expansion in a 3D FEA. Expanders were activated transversely for 0.

Three-dimensional assessment of airway volumes in patients with unilateral cleft lip and palate.

Background: Considering the adverse consequences of respiratory insufficiency in cleft lip and palate (CLP) patients, this study aimed to assess the pharyngeal airway dimensions in 9-12-year-old patients with unilateral CLP. This historical cohort evaluated the cone-beam computed tomography (CBCT) scans of 30 patients with non-syndromic unilateral CLP between 9 and 12 years and 30 age- and sex-matched non-cleft controls. Three-dimensional (3D) images were reconstructed by the Mimics software, and the nasopharyngeal, oropharyngeal, and total airway volumes, as well as the minimal cross-sectional area of the airway (minAx), and posterior airway length (PAL) were all measured in the sagittal plane.

The ideal insertion angle after immediate loading in Jeil, Storm, and Thunder miniscrews: A 3D-FEM study.

Objective: The miniscrew is effectively used to provide additional anchorage for orthodontic purposes. The aim of this study was to identify an optimal insertion angle for Jeil, Storm, and Thunder miniscrews on stress distribution at the bone miniscrew interface.

Materials And Methods: To perform 3-dimensional finite element model analysis, a 3-dimensional model with a bone block was constructed with type D2 of bone quality, and with miniscrews of Storm, Thunder, Jeil, with the diameter of 2, 1.

The effect of Alexander, Gianelly, Roth, and MBT bracket systems on anterior retraction: a 3-dimensional finite element study.

Objectives: The aims of this study were to compare the effect of 4 bracket systems including Alexander, Roth, MBT, and Gianelly on upper anterior retraction and to quantify the amount of torque loss ratio in sliding mechanics by help of a 3-dimensional (3D) finite element method.

Method And Materials: 3D FEM models were constructed in order to simulate anterior incisor retraction in first premolar extraction case. Displacement, stress, and strain on the incisal edge and apex of maxillary central incisor were calculated when 1-, 2-, and 3-N retraction forces were applied.

3-dimensional finite element analysis of the outcomes of Alexander, Gianelly, Roth and MBT bracket prescription.

Unlabelled: The purpose of this study was to compare the effect of a 4-bracket system including Alexander, Roth, MBT (Maxillary Transverse Bioadaptation), and Gianelly on the upper anterior tooth movement in sliding mechanics with the help of a 3-Dimensional (3D) Finite Element Method.

Methods: Displacement, stress, strain, centre of rotation and resistance on the incise edge and apex of the maxillary central incisor were calculated when 100, 200, 300, 400grams of retraction force were applied.

Results: The amount of incise edge displacement was 2.

Cephalometric changes in nasopharyngeal area after anterior maxillary segmental distraction versus Le Fort I osteotomy in patients with cleft lip and palate.

Objective: The present study was designed to compare the effects of two surgical methods, anterior maxillary segmental distraction (AMSD) versus conventional Le Fort I osteotomy, on cephalometric changes of velopharyngeal area of patients with cleft lip and palate.

Materials And Methods: This study was conducted on 20 CLP in two groups. The first group had classic Le Fort I maxillary advancement and the second group had AMSD with a modified hyrax as an intraoral tooth-borne distractor.

Treatment decision in adult patients with class III malocclusion: surgery versus orthodontics.

Background: One of the most controversial issues in treatment planning of class III malocclusion patients is the choice between orthodontic camouflage and orthognathic surgery. Our aim was to delineate diagnostic measures in borderline class III cases for choosing proper treatment.

Methods: The pretreatment lateral cephalograms of 65 patients exhibiting moderate skeletal class III were analyzed.

Tooth-borne distraction osteogenesis versus conventional Le Fort I in maxillary advancement of cleft lip and palate patients.

Background: Distraction osteogenesis (DO) is rapidly becoming a mainstream surgical technique for correction of maxillary deficiency. The aim of this study was to compare the effectiveness of a newly designed tooth-borne osteogenic distraction device with conventional Le Fort 1 osteotomy in maxillary advancement of cleft lip and palate patients.

Methods: The DO group consisted of 10 subjects (7 males, 3 females) with a mean age of 21.

Family history and risk factors for cleft lip and palate patients and their associated anomalies.

Background And Aims: Several environmental and genetic issues have been suspected as risk factors for oral clefts; and many studies have been conducted in this regard; however, large socioeconomic impacts of cleft lip and or palate (CL/P) justifies the need for further multifactorial researches. Current study aimed to assess parental risk factors for CL/P and its associated malformations.

Material And Methods: Hospital records of 187 consecutive syndromic and non-syndromic children with cleft lip and or palate (103 boys and 84 girls) with a mean age of 1.

Effect of Bionator and Farmand Appliance on the Treatment of Mandibular Deficiency in Prepubertal Stage.

Objective: The present study aimed to compare dentoskeletal changes in mandibular-deficient patients treated with Bionator and Farmand appliances.

Methods: This study included 54 subjects treated for class II division I malocclusion. All subjects fulfilled the following criteria: ANB>5°, SNB<77°, and overjet >5 mm.

In vivo confocal microscopy analysis of enamel defects after orthodontic treatment: A preliminary study.

After orthodontic treatment with fixed appliances, bonded brackets and residual adhesive must be removed. This procedure should lead to restitutio ad integrum of the enamel or, at least, restore the enamel surface as closely as possible to its pre-treatment conditions. The purpose of this study is the in vivo assessment at a microscopic resolution of enamel surfaces after bracket debonding while avoiding the tooth extraction.

Orthodontic Treatment of Malocclusion and its Impact on Oral Health-Related Quality of Life.

Objectives: Malocclusion, though not life-threatening, has vast impact on individual's social interactions and self-esteem. Therefore, the aim of the current study was to assess whether orthodontic treatment of adolescents with malocclusion had any association with their oral health-related quality of life (OHRQoL).

Methods: The subjects for this study were recruited at a state-funded university clinic.

Cleft sidedness and congenitally missing teeth in patients with cleft lip and palate patients.

Background: The aim of this study was to investigate the prevalence of cleft sidedness, and the number of congenitally missing teeth in regard to cleft type and gender.

Methods: The charts, models, radiographs, and intraoral photographs of 201 cleft patients including 131 males with the mean age of 12.3 ± 4 years and 70 females with the mean age of 12.

Methodological quality and outcome of systematic reviews reporting on orthopaedic treatment for class III malocclusion: Overview of systematic reviews.

Objectives: The aim of this overview of systematic reviews was to investigate methodological quality and outcome of current systematic reviews (SRs) reporting on orthopaedic treatment for class III malocclusion.

Materials And Methods: Computerized and manual searches were performed in Medline, Google Scholar, Cochrane Library, Embase, LILACS, SciELO, American Journal of Orthodontics and Dentofacial Orthopaedics, Angle Orthodontist, European Journal of Orthodontics, Journal of Orthodontics, Conference abstracts and Grey literature. No restrictions were set on language or date of publication.

Release of metal ions from round and rectangular NiTi wires.

Background: The aim of this study was to evaluate the amount of nickel and titanium ions released from two wires with different shapes and a similar surface area.

Methods: Forty round nickel-titanium (NiTi) arch wires with the diameter of 0.020 in.

Photogrammetric analysis of facial profile in Persian adults.

When facial photographs are analyzed for the purpose of identifying esthetics norms, differences in dentofacial relationships among ethnic and racial groups must be taken into consideration. Therefore, it is necessary to establish standards for various populations. The purpose of this study was to establish norms of photogrammetric soft tissue profile analysis for Persian adults.