Cavity Prepared
Mostrando 25-36 de 94 artigos, teses e dissertações.
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25. Effect of betamethasone on the pulp after topical application to the dentin of rat teeth: vascular aspects of the inflammation
OBJECTIVE: This study investigated the pulpal effect of topically applied betamethasone to the dentin of rat molars in the vascular phase of inflammation. MATERIAL AND METHODS: Deep cavities were prepared on the occlusal face of the maxillary right and left 1st molars with non-refrigerated inverted-cone steel burs at low speed. Three groups were formed: Grou
Journal of Applied Oral Science. Publicado em: 2009-08
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26. Sealing ability of castor oil polymer as a root-end filling material
OBJECTIVE: The purpose of this study was to evaluate the sealing ability of castor oil polymer (COP), mineral trioxide aggregate (MTA) and glass ionomer cement (GIC) as root-end filling materials. Forty-five single-rooted human teeth were cleaned and prepared using a step-back technique. The apical third of each root was resected perpendicularly to the long
Journal of Applied Oral Science. Publicado em: 2009-06
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27. Fracture resistance of weakened teeth restored with condensable resin with and without cusp coverage
OBJECTIVES: This in vitro study evaluated the fracture resistance of weakened human premolars (MOD cavity preparation and pulp chamber roof removal) restored with condensable resin composite with and without cusp coverage. MATERIAL AND METHODS: Thirty human maxillary premolars were divided into three groups: Group A (control), sound teeth; Group B, wide MOD
Journal of Applied Oral Science. Publicado em: 2009-06
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28. A influência da técnica do preparo cavitário utilizando laser Er: YAG e dos tipos de materiais restauradores na prevenção de cárie secundária
The influence of the cavity preparation technique and the types of restorative materials containing fluorides in the prevention of the secondary caries lesions was evaluated in this in vitro study. In a logic sequence the subject was approach by four manuscripts. The first study made a bibliographic revision about the laser employment in the prevention of th
Publicado em: 2009
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29. Propriedades físicas da resina acrílica para coroas provisórias em função de diferentes técnicas de polimerização (rugosidade, porosidade, microdureza, sorção e solubilidade) / Physical properties of acrylic resin for provisional crowns under different curing techniques
An in vitro evaluation of the influence of three variables (polymerization medium (air/water), temperature and pressure) on roughness, porosity, microhardness, sorption and solubility of an acrylic resin for provisional crowns was conducted according to 4 techniques (direct and indirect). The samples were prepared using a poly (methylmethacrylate) (PMMA) res
Publicado em: 2009
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30. Pulpal temperature increase with high-speed handpiece, Er:YAG laser and ultrasound tips
The aim of this study was to compare intrapulpal temperature increase produced by high-speed handpiece, Er:YAG laser and CVDentus ultrasound tips during cavity preparation. Thirty bovine mandibular incisors with an enamel/dentin thickness of 4 mm at buccal surface had their roots amputated and were allocated to the following groups (n=10): Group I- high-spee
Journal of Applied Oral Science. Publicado em: 2008-06
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31. O efeito Casimir dinâmico e decoerência
In this thesis we first demonstrate that the inevitable action of the environment can be substantially weakened when considering appropriate nonstationary quantum systems. Beyond protecting quantum states against decoherence, an oscillating frequency can be engineered to make the system-reservoir coupling almost negligible. Differently from the program for e
Publicado em: 2008
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32. Avaliação comparativa pelos testes micropush-out e micro-cisalhamento da resistência adesiva de restaurações diretas de resina composta usando diferentes sistemas adesivos
The bond strength may be influenced by the different composition and manipulation of the adhesive systems, the dentin structure and the method of evaluation. After exposure of the occlusal dentin surface 160 third human molars were divided in 2 groups (n=80) for the micropush-out (μPBS) and microshear (μSBS) bond strength tests. For the μPBS,
Publicado em: 2008
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33. Assessment of the disinfection of root canals using a rotatory system associated or not to a complementary chemical treatment / Avaliação da desinfecção do canal radicular frente ao preparo químico-cirúrgico por meio rotatório associado ou não a tratamento químico complementar
The effective disinfection of root canals represents a constant clinical concern. This research aimed at verifying the level of disinfection achieved by mechanical instrumentation using the K3 system when compared to the associated use of the same system and a complementary chemical dentinal treatment. Sixteen singlerooted lower canines were randomly divided
Publicado em: 2008
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34. Fluoride release of six restorative materials in water and pH-cycling solutions
The fluoride release of restorative materials in deionized water has been the subject of many studies, but the behavior of these materials under conditions of acid challenge that simulates the oral cavity, needs to be further explored. Therefore, the aim of this study was to evaluate the fluoride release of restorative materials in two storage protocols: dei
Journal of Applied Oral Science. Publicado em: 2007-10
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35. Analysis of gap formation at tooth-composite resin interface: effect of C-factor and light-curing protocol
OBJECTIVE: The aim of this study was to evaluate the effect of C-factor and light-curing protocol on gap formation in composite resin restorations. Material and METHODS: Cylindrical cavities with 5.0 mm diameter and three different depths (A=1.0, B=2.0 and C=3.0 mm) were prepared on the occlusal surface of 30 human molars and restored in a single increment w
Journal of Applied Oral Science. Publicado em: 2007-08
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36. Effect of acid etching of glass ionomer cement surface on the microleakage of sandwich restorations
The purposes of this study were to evaluate the sealing ability of different glass ionomer cements (GICs) used for sandwich restorations and to assess the effect of acid etching of GIC on microleakage at GIC-resin composite interface. Forty cavities were prepared on the proximal surfaces of 20 permanent human premolars (2 cavities per tooth), assigned to 4 g
Journal of Applied Oral Science. Publicado em: 2007-06