搜索结果: 1-15 共查到“口腔正畸学 Composite”相关记录19条 . 查询时间(0.14 秒)
Marginal integrity and microleakage of direct and indirect composite inlays: SEM and stereomicroscopic evaluation
Composite resins Dental restoration failure Dental leakage Marginal adaptation Adaptaç ã o marginal
2009/10/20
The aim of this study was to evaluate the microleakage of direct and indirect composite inlays by stereomicroscopy and scanning electron microscopy (SEM). Thirty bovine incisors were ground to obtain ...
Influence of composite restorative materials and light-curing units on diametrical tensile strength
Light emitting diode Composite resins Diametrical tensile strength Mechanical properties
2009/10/19
The aim of this study was to evaluate the diametrical tensile strength (DTS) of three light-curing photo-activated composites with two different light curing units (LCU). Three types of dental restora...
Hardness of a bleaching-shade resin composite polymerized with different light-curing sources
Composite resins Dental materials Hardness
2009/10/19
The microhardness of a bleaching-shade resin composite polymerized with different light-curing units was evaluated. Composite samples (3M ESPE Filtek Supreme) were applied to brass rings (2 mm in thic...
Diametral tensile strength of composite resins submitted to different activation techniques
Composite resins Physical properties Tensile strength
2009/10/19
The aim of this study was to evaluate the diametral tensile strength (DTS) of composite resins submitted to different curing techniques. Four composite resins were tested in this study: Targis (Ivocla...
Streptococcus mutans-induced secondary caries adjacent to glass ionomer cement,composite resin and amalgam restorations in vitro
Dental caries Streptococcus mutans Dental materials
2009/10/19
The aim of this study was to define, in vitro, the potential to inhibit secondary caries of restorative materials currently used in dental practice. Standard cavities were prepared on the buccal and l...
Flexural and diametral tensile strength of composite resins
Composite resins Tensile strength Physical properties
2009/10/16
This study evaluated the flexural strength (sf) and the diametral tensile strength (st) of light-cured composite resins, testing the hypothesis that there is a positive relation between these properti...
Clinical Study of a Polyacid-Modified Resin Composite-Based Fissure Sealant in Young Permanent Molars
Composite resins compomers pit and fissure sealants retention
2009/4/2
Background: Treating caries-susceptible pits and fissures with resin sealants enjoys wide acceptance as a preventive strategy. The aim of this study was to evaluate the one-year clinical performance...
Bond Strength of Amorphous Calcium Phosphate–Containing Orthodontic Composite Used as a Lingual Retainer Adhesive
Bond strength Amorphous calcium phosphate Lingual retainer
2010/3/5
Objective: To evaluate the shear bond strength and fracture mode difference between amorphous calcium phosphate (ACP)–containing adhesive and conventional resin-based composite material used as an ort...
The effect of enamel preparation on the tensile bond strength of orthodontic composite resin
Tensile bond strength Orthodontic brackets Air-powder polisher Enamel surface preparation Sodium bicarbonate residue Orthodontic composite resin
2009/1/13
The bonding of orthodontic brackets to enamel surface using bis-GMA composite resin is usually accomplished by first cleaning the tooth surface then etching with phosphoric acid. This study compar...
Laser-aided degradation of composite resin
Laser Nd: YAG Composite resin Dental enamel Orthodontic brackets
2009/1/9
The removal of residual composite resin after debonding orthodontic brackets often creates surface scratches, enamel loss, and enamel tearouts. If the Nd: YAG laser could selectively degrade the res...
Stress-relaxing composite ligature wires：Formulations and characteristics
Composite Ligature Mechanical properties Stress relaxation.
2009/1/7
A stress-relaxing composite ligature was developed that has both mechanical and esthetic characteristics that make it attractive for use in orthodontics. The neutrally-colored polymer-polymer comp...
Combinations of etchants, composite resins, and bracket systems：An important choice in orthodontic bonding procedures
Orthodontic bonding Acid concentrations
2009/1/7
The objectives of this investigation were: (1) to compare the shear bond strengths (SBS) of metal, ceramic, and plastic brackets using different concentrations of maleic and phosphoric acid gels and...
The Effect of Repeated Bonding on the Shear Bond Strength of a Composite Resin Orthodontic Adhesive
Rebonding Orthodontic brackets Shear bond strength
2009/1/4
One of the problems clinicians face during treatment is bracket failure. This is usually the result either of the patient's accidentally applying inappropriate forces to the bracket or of a poor bon...
Sliding Mechanics of Coated Composite Wires and the Development of an Engineering Model for Binding
Binding Coatings Composites Friction Wire mechanics
2008/12/29
A tribological (friction and wear) study, which was designed to simulate clinical sliding mechanics, was conducted as part of an effort to determine the suitability of poly(chloro-p-xylylene) coat...
A New One-Step Dental Flowable Composite for Orthodontic Use: An In Vitro Bond Strength Study
Shear bond strength Flowable composite Orthodontic brackets
2008/12/1
A new flowable composite, Denfil Flow®, has shown an acceptable shear bond strength for bonding orthodontic brackets, when used with an intermediate, unfilled, low-viscosity resin. According t...