نتایج جستجو برای: ceramic brackets

تعداد نتایج: 27817  

Journal: :journal of lasers in medical sciences 0
soghra yassaei department of orthodontics, faculty of dentistry, shahid sadoughi university of medical sciences, yazd, iran hossein aghili department of orthodontics, faculty of dentistry, shahid sadoughi university of medical sciences, yazd, iran azadeh hosseinzadeh firouzabadi department of oral pathology, faculty of dentistry, lorestan university of medical sciences, khorramabad, iran hamidreza meshkani department of orthodontics, faculty of dentistry, lorestan university of medical sciences, khorramabad, iran

introduction: this study was performed to determine the shear bond strength of rebonded mechanically retentive ceramic brackets after recycling with erbium-doped yttrium aluminum garnet (er:yag) laser or sandblasting. methods: twenty-eight debonded ceramic brackets plus 14 intact new ceramic brackets were used in this study. debonded brackets were randomly divided into 2 groups of 14. one group...

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Journal: Caspian Journal of Dental Research 2022
Ali Bijani, Maysam Mirzaie, Mostafa Ebrahimi, Reza Ghorbanipour, Tania Ghasemi,

Introduction: Metal brackets are the most commonly used brackets in clinical orthodontics, but the sight of color of the metal bracket can be unpleasant for some patients. Ceramic brackets offer the desired beauty but they have higher frictional resistance.  Considering that in vitro studies suggest that CO2 laser reduces the friction between the wire and slot of the bracket in the sliding mech...

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2012
Behnam Mirzakouchaki Soodabeh Kimyai Mahboubeh Hydari Shirin Shahrbaf Parvin Mirzakouchaki-Boroujeni

INTRODUCTION Bracket debonding from the tooth surface is a common problem in fixed orthodontics. The aims of the present study were to assess the bond strength and failure sites in two ways of bonding technique, with metallic and ceramic brackets. MATERIALS AND METHODS One hundred premolars were assigned to 4 groups of 25 each: Group A, metallic brackets/conventional procedure; Group B, metal...

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Journal: :journal of dentistry, tehran university of medical sciences 0
ms. ahmad akhoundi associate professor, dental research center, tehran university of medical sciences, tehran, iran m. rahmati kamel assistant professor, school of dentistry, babol university of medical sciences, babol, iran sh. mahmood hashemi orthodontist, private practice m. imani postgraduate student, department of orthodontics, school of dentistry, tehran university of medical

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...

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2018
Murilo MATIAS Marcos Roberto de FREITAS Karina Maria Salvatore de FREITAS Guilherme JANSON Rodrigo Hitoshi HIGA Manoela Fávaro FRANCISCONI

Coated archwires and ceramic brackets have been developed to improve facial esthetics during orthodontic treatment. However, their mechanical behavior has been shown to be different from metallic archwires and brackets. Therefore, the aim of this study was to compare the deflection forces in coated nickel-titanium (NiTi) and esthetic archwires combined with ceramic brackets. Material and Method...

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Journal: :The journal of contemporary dental practice 2012
P V Girish Uma Dinesh C S Ramachandra Bhat Pradeep Chandra Shetty

AIM To evaluate and compare the shear bond strength of metal brackets bonded to ceramic surfaces using different conditioning methods and to assess the site of bond failure after debonding. MATERIALS AND METHODS A total of 70 ceramic surfaces were produced with uniform shape, size and composition. The samples were divided into 7 groups (each of 10 samples). Group 1 was the control group (untr...

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2014
Soghra Yassaei Abdolrahim Davari Mahjobeh Goldani Moghadam Ahmad Kamaei

OBJECTIVE The aim of this study was to compare the shear bond strength (SBS) of resin modified glass ionomer (RMGI) and composite resin for bonding metal and ceramic brackets. MATERIALS AND METHODS Eighty-eight human premolars extracted for orthodontic purposes were divided into 4 groups (n=22). In groups 1 and 2, 22 metal and ceramic brackets were bonded using composite resin (Transbond XT),...

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Journal: :The journal of contemporary dental practice 2012
Abdolrahim Davari Soghra Yassaei Mariam Karandish Fateme Zarghami

AIM The aim of the present study was to evaluate these two high intensity light curing units regarding microleakage beneath metal and ceramic brackets. MATERIALS AND METHODS A total of 60 freshly extracted human premolar teeth were randomly divided into four groups of 15 samples; group I: Metal bracket + LED cured, group II: Ceramic bracket + LED cured, group III: Metal bracket + plasma arc c...

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Journal: :European journal of orthodontics 1996
U Stratmann K Schaarschmidt H Wegener U Ehmer

This clinical study investigated the practical value of two methods for debonding brackets attached by the adhesive Concise to acid-etched enamel surfaces. Forty-two Ultratrimm Standard metal brackets and 42 Fascination ceramic brackets were collected from juvenile patients undergoing orthodontic treatment. All metal brackets were mechanically debonded by a conventional bracket removal plier, w...

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Journal: :European journal of orthodontics 1999
S P Jones J R Gledhill E H Davies

An ex vivo study was carried out to determine differences in the bond strengths achieved with brackets placed using a crystal growth technique compared with a conventional acid-etch technique. A solution of 37 per cent phosphoric acid was used for acid-etching and a commercially available polyacrylic acid gel, Crystal-lok for crystal growth. A heavily-filled composite resin was used for all sam...

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