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Your search keyword '"Akhoundi MS"' showing total 2 results
Start Over Author "Akhoundi MS" Topic orthodontics
2 results on '"Akhoundi MS"'

1. A comparison between craniofacial templates of Iranian and western populations.

Author

Akhoundi MS, Chalipa J, Hashemi R, Nik TH, Sodagar A, and Afzalifar R

Subjects
Adolescent, Cephalometry, Child, Humans, Iran, Male, Malocclusion diagnosis, Facial Bones anatomy & histology, Orthodontics, Skull anatomy & histology
Abstract

Templates are very useful tools for diagnosis of malocclusions. A number of templates have been provided for some populations in previous years. Since craniofacial characteristics of different ethnic groups are not the same, each population needs its own norms. The aim of this study was to provide orthodontic craniofacial templates for 8-16 year old Iranian boys and compare dentoskeletal features between Iranian and western populations. 3330 boys with the age range of 8-16 years were examined in Tehran, and 107 cases were finally chosen for the study and their lateral cephalograms were traced. Since there is no universal, consensus about the selection of one specific point or line for cephalometric superimposition, both the sella nasion (SN) and basion nasion (Ba-N) lines were chosen for this purpose. Based on both SN and Ba-N lines, a template was prepared for each age. Simple linear regression analysis was used to evaluate the angles and the multivariant regression analysis for evaluation of landmark vectors. Posterior cranial base, maxillary and mandibular lengths, upper and lower anterior facial heights (N-ANS and ANS-Me) and posterior facial height (S-Go) are greater in Iranian population. But anterior cranial base, height and inclination of the incisors and molar height are similar in two populations.

Published
2012

2. Tensile bond strength of metal bracket bonding to glazed ceramic surfaces with different surface conditionings

Author

Akhoundi, MS. Ahmad, Kamel, M. Rahmati, Hashemi, SH. Mahmood, and Imani, M.

Subjects
Tensile Strength, Dental Bonding, Original Article, Orthodontics, Glazed Ceramic
Abstract

Objective The objective of this study was to compare the tensile bond strength of metal brackets bonding to glazed ceramic surfaces using three various surface treatments. Materials and Methods Forty two glazed ceramic disks were assigned to three groups. In the first and second groups the specimens were etched with 9.5% hydrofluoric acid (HFA). Subsequently in first group, ceramic primer and adhesive were applied, but in second group a bonding agent alone was used. In third group, specimens were treated with 35% phosphoric acid followed by ceramic primer and adhesive application. Brackets were bonded with light cure composites. The specimens were stored in distilled water in the room temperature for 24 hours and thermocycled 500 times between 5°C and 55°C. The universal testing machine was used to test the tensile bond strength and the adhesive remenant index scores between three groups was evaluated. The data were subjected to one-way ANOVA, Tukey and Kruskal-Wallis tests respectively. Results The tensile bond strength was 3.69±0.52 MPa forfirst group, 2.69±0.91 MPa for second group and 3.60±0.41 MPa for third group. Group II specimens showed tensile strength values significantly different from other groups (P

Published
2011

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