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All Journal Indian Journal of Forensic Medicine & Toxicology Journal of Global Pharma Technology
Shahbaa A. Mohammed
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Medicine & Pharmacology Public Health

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Evaluating the Effect of Air Abrasive Polishing on Friction and Surface Micromorphology of Ceramic Brackets Using Different Wires Ahmed R. Mohammed Hassan; Shahbaa A. Mohammed
Indian Journal of Forensic Medicine & Toxicology Vol. 15 No. 4 (2021): Indian Journal of Forensic Medicine & Toxicology
Publisher : Institute of Medico-legal Publications Pvt Ltd

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37506/ijfmt.v15i4.16735

Abstract

Objectives: The aim of this in vitro study was to evaluate the Resistance to Sliding (RS) provided by ceramic(Perfect clear) sapphire ceramic brackets using round 2 types of orthodontic wires (Fiber-Reinforced PolymerComposite (FRPC) and Epoxy fully coated Stainless-Steel), before and after the use of sodium bicarbonateairborne particle abrasion, in an experimental model with 3 non levelled brackets and to evaluate the surfacemicromorphology of these brackets by means of scanning electron microscopy.Materials and Methods: 0ne commercial brands of ceramic brackets were evaluated. The fourty specimenswere divided into two groups (n = 20) according to the two type of arch wires and each group was dividedinto four subgroup of five specimens according to the application or not of sodium bicarbonate airborneparticle abrasion for (5, 10 and 20) seconds. A device adapted to a universal testing machine was used tosimulate the movement of retraction in sliding mechanics, measuring the traction force needed to slide 10mm of the wire over the test specimen brackets. The test speed was 5 mm/min. The data were analyzed bytwo-way analysis of variance (ANOVA) and Tukey test.Conclusions: It may be concluded that it is not recommended to apply airborne particle abrasion on the slotsof ceramic.
Photographical Assessment of Face Pleasantness using Facial Analysis for a Sample of Iraqi Adults Females (Retrospective Study) Shahbaa A. Mohammed
Journal of Global Pharma Technology Volume 11 Issue 05.
Publisher : Journal of Global Pharma Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (626.873 KB)

Abstract

Aims: The aim of this study was to assess facial attractiveness and to check if the numeric facial analysis can determine this attractiveness for a sample of Iraqi adults' females and characterize the studied sample according to subjective concepts of facial esthetics in esthetically pleasant, esthetically acceptable and esthetically unpleasant, considering frontal photographs.  Subjects and Methods: Forty frontal standardized photograph of females aged between 20 and 22 years old. The frontal photograph and lateral photograph were obtained by asking each female to look to the center of the lens and at a distant mirror respectively which is placed in front of her face. All the frontal photographs were evaluated by using our own esthetics criteria (orthodontist evaluation) as graduation in: pleasant, acceptable and not pleasant. The numeric facial analysis was then performed. Linear, proportional and angular measurements were compared among groups. Results: The sample was consisted of 25% of unpleasant, 55% of acceptable and 20% of pleasant according to subjective analysis.  In most measurements there were no differences among groups. Just in one linear measurement (sn-U1 FILS) significant statistical difference was observed. Group III has higher right and a left symmetry angel despite it has lower facial symmetry Conclusions: In the evaluation of facial measurements, it was observed that there were statistically non-significant except for the sn-U1 FILS, which is statistically significant. The photographic evaluations require more than one evaluator in different specialties to give more reliable judgment. The facial analysis influenced by, age, gender, cultural and racial factors.Keywords: Attractiveness, Facial esthetics, Facial analysis.
Co-Authors Ahmed R. Mohammed Hassan