نتایج جستجو برای: enamel surface preparation

تعداد نتایج: 804438  

Journal: :journal of dentistry, tehran university of medical sciences 0
ayoub pahlevan associate professor, dental research center dentistry research institute, department of operative dentistry, school of dentistry, tehran university of medical sciences, tehran, iran. mansoreh mirzaee assistant professor, dental research center dentistry research institute, department of operative dentistry, school of dentistry, tehran university of medical sciences, tehran, iran. esmaeil yassine professor, dental research center dentistry research institute, department of operative dentistry, school of dentistry, tehran university of medical sciences, tehran, iran. ladan ranjbar omrany assistant professor, dental research center dentistry research institute, department of operative dentistry, school of dentistry, tehran university of medical sciences, tehran, iran. masumeh hasani tabatabaee associate professor, dental research center dentistry research institute, department of operative dentistry, school of dentistry, tehran university of medical sciences, tehran, iran. hamid kermanshah associate professor, dental research center dentistry research institute, department of operative dentistry, school of dentistry, tehran university of medical sciences, tehran, iran.

in this investigation the thickness of enamel in the gingival, middle, and incisal thirds of the labial surface of the anterior teeth were measured regarding preparation of the teeth for porcelain laminate veneers.part one, 20 extracted intact human maxillary central and lateral incisors ten of each were selected. the teeth were imbedded in autopolimerize acrylic resin. cross section was prefor...

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Journal: :journal of dentistry, tehran university of medical sciences 0
m h hosseini assisstant professor, department of orthodontic, school of dentistry, tehran university of medical science, tehran, iran. f namvar j chalipa k saber n chiniforush s sarmadi

the purpose of this study was to compare shear bond strength (sbs) of orthodontic brackets bonded to enamel prepared by er:yag laser with two different powers and conventional acid-etching.forty-five human premolars extracted for orthodontic purposes were randomly assigned to three groups based on conditioning method: group 1- conventional etching with 37% phosphoric acid; group 2- irradiation ...

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2014
Ayoub Pahlevan Mansoreh Mirzaee Esmaeil Yassine Ladan Ranjbar Omrany Masumeh Hasani Tabatabaee Hamid Kermanshah Sakineh Arami Mehdy Abbasi

OBJECTIVE In this investigation the thickness of enamel in the gingival, middle, and incisal thirds of the labial surface of the anterior teeth were measured regarding preparation of the teeth for porcelain laminate veneers. MATERIALS AND METHODS Part one, 20 extracted intact human maxillary central and lateral incisors ten of each were selected. The teeth were imbedded in autopolimerize acry...

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Journal: :Dental materials : official publication of the Academy of Dental Materials 2005
William J Dunn John T Davis Anneke C Bush

OBJECTIVES The purpose of this study was to evaluate dentin and enamel bond strength to resin composite following high-speed rotary or Er:YAG laser preparation using a total etch adhesive system. The microstructure of resin-tooth interfaces was also investigated. METHODS Human dentin and enamel specimens were prepared with a high-speed handpiece (KaVo) or Er:YAG laser (DELight) at manufacture...

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Journal: :European journal of paediatric dentistry : official journal of European Academy of Paediatric Dentistry 2012
M Shahabi H Moosavi A Gholami F Ahrari

AIM The aim of this study was to evaluate the efficiency of several surface preparation methods for improving shear bond strength of brackets to demineralised enamel. MATERIALS AND METHODS STUDY DESIGN in vitro study. Eighty premolars were selected and divided into 5 groups. Group 1 served as the control, while the remaining 4 groups were immersed in a demineralising solution (pH 4.8) for ...

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2017
Mohammad Sadegh Ahmad Akhoundi Ardavan Etemadi Maryam Nasiri Elahe Soltanmohamadi Borujeni

Objectives Many studies have evaluated re-etched enamel by using scanning electron microscopy (SEM); however, there is no evidence regarding the use of Erbium-doped yttrium aluminium garnet (Er:YAG) laser at primary and secondary bonding instead of acid etching with regards to enamel surface changes. The purpose of the present study was to determine that whether or not the methods of primary an...

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Journal: :journal of dentistry, tehran university of medical sciences 0
zahra bahrololoomi associate professor, department of pedodontics, member of social determinants of oral health research center, faculty of dentistry, shahid sadoughi university of medical sciences, yazd, iran mona kabudan pedodontist leila gholami assistant professor, department of periodontics, faculty of dentistry, zahedan university of medical sciences, zahedan, iran

o bjectives: bond strength of composite resin to enamel and dentin of primary teeth is lower than that to permanent teeth; therefore, it may compromise the ad- hesive bonding. new methods, such as laser application have been recently intro- duced for tooth preparation. the purpose of this study was to evaluate the effect of tooth preparation with bur and er:yag laser on shear bond strength of c...

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Journal: :European journal of orthodontics 2012
H R Pakshir H Zarif Najafi S Hajipour

Bond failure after rebonding for newly placed brackets can be reduced by appropriate enamel surface treatment. This in vitro study investigated the effect of two enamel surface treatments on the bond strength of metallic brackets in the rebonding process. After debonding the brackets and removing the residual adhesive on the enamel surface of 50 upper premolar teeth, the teeth were divided into...

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Journal: :Journal of prosthodontics : official journal of the American College of Prosthodontists 2011
Ana Rafaela Luz de Aquino Alessandra Oliveira Barreto Luana Maria Martins de Aquino Ângela Maria Fernandes Ferreira Adriana da Fonte Porto Carreiro

PURPOSE Adequate preparation of abutment teeth for removable partial denture (RPD) rest seats allows appropriate masticatory force transmission, retention, and stability of supporting structures. It follows that careful preparation will be important for the longevity of the rehabilitation. The present study aimed to clinically evaluate rest seats and undercut areas of abutment teeth in RPD wear...

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2015
Zahra Bahrololoomi Mona Kabudan Leila Gholami

OBJECTIVES Bond strength of composite resin to enamel and dentin of primary teeth is lower than that to permanent teeth; therefore, it may compromise the adhesive bonding. New methods, such as laser application have been recently introduced for tooth preparation. The purpose of this study was to evaluate the effect of tooth preparation with bur and Er:YAG laser on shear bond strength of composi...

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