Influence of Teeth Preparation Finishing on the Adaptation of Lithium Disilicate Crowns.

The polishing step of teeth preparations for crowns is a step often performed, so that there is an increased time during the clinical procedure. The aim of this study is to evaluate the marginal and internal adaptation of all-ceramic CAD/CAM lithium disilicate crowns in polished preparations for crown and nonpolished preparations for crowns. For this purpose, 20 first molars were selected, which were divided into two groups ( = 10) G1, teeth that received surface roughening similar to preparation without polishing, and G2 (control), polished preparations.

Esthetic Rehabilitation of Retained Primary Teeth-A Conservative Approach.

With the advancement in ceramic restorations bonded to tooth structure, the treatment has become a feasible and conservative option to restore teeth with alteration in shape when owing to high demand in esthetics, with or without minimum tooth preparation. This article describes a report of a 32-year-old woman who was dissatisfied with her smile. The patient reported that she still had deciduous teeth, and that the maxillary lateral incisors had been restored with direct resin composite to correct the teeth shape.

Clinical evaluation of different desensitizing agents in home-bleaching gels.

Statement Of Problem: The influence of different compositions of desensitizing agents in whitening gels should be evaluated.

Purpose: The purpose of this clinical trial was to compare the effectiveness of 4 carbamide peroxide (CP)-based bleaching gels containing desensitizing agents regarding the degree of bleaching, tooth sensitivity, degree of participant satisfaction, and gingival irritation.

Material And Methods: The maxillary arch of the 50 participants was bleached using a split mouth, home-bleaching technique.

Heat Treatment Influences Monomer Conversion and Bond Strength of Indirect Composite Resin Restorations.

Purpose: To assess the resin microtensile bond strength (MTBS) and the degree of conversion (DC) of indirect composite resin restorations polymerized with light and heat.

Materials And Methods: Two direct (Filtek Z100 and Premise) and one indirect (Premise Indirect) composite resins were polymerized with a combination of light and heat (138°C for 20 min). For MTBS, 42 cylinders were fabricated (n = 7).

Effect of ceramic thickness and composite bases on stress distribution of inlays--a finite element analysis.

The purpose of this study was to determine the effect of cavity depth, ceramic thickness, and resin bases with different elastic modulus on von Mises stress patterns of ceramic inlays. Tridimensional geometric models were developed with SolidWorks image software. The differences between the models were: depth of pulpal wall, ceramic thickness, and presence of composite bases with different thickness and elastic modulus.

Bond strength and monomer conversion of indirect composite resin restorations, Part 1: Light vs heat polymerization.

Purpose: To assess the resin microtensile bond strength (MTBS) and the monomer conversion (MC) of indirect composite resin restorations made of three different materials.

Materials And Methods: Two light-polymerized direct materials (Filtek Z100 and Premise) and one light- and heat-polymerized indirect material (Premise Indirect) were used. For MTBS testing, 42 cylindrical samples were fabricated (7 pairs per material).

Silorane adhesive system: a case report.

Silorane-based composite resin requires a specific adhesive system: a 2-step self-etching adhesive. Clinical protocols are well established and are based on the principles of adhesion to mineralized dental tissues. In this paper, we present a clinical application of the silorane adhesive system in a class-II restoration using silorane-based composite resin.

Influence of resin composite shade and location of the gingival margin on the microleakage of posterior restorations.

Objective: The objective of this in vitro study was to evaluate the influence of resin composite shade and location of the gingival margin (enamel or dentin) on the microleakage of proximal restorations on posterior teeth.

Methods And Materials: Sixty freshly extracted human third molars were prepared with standardized Class II box-shaped cavities with proportional size and shape, with distal gingival margins located on the enamel and mesial gingival margins on dentin. The teeth were randomly divided into 6 groups according to resin shade (n=10): G1-Incisal; G2-A1; G3-A2; G4-A3; G5-A3.

Effect of led light curing on the marginal sealing of composite resin restorations.

Light-emitting diode (LED) curing units are becoming increasingly popular; however, questions remain about their ability to adequately polymerize composite resins. This study was conducted to evaluate the marginal seal of restorations placed with a tungsten halogen curing unit compared to three LED curing units through a microleakage test. The results did not indicate statistical differences between the groups tested for both enamel and dentin margins.

Effect of placement techniques on the marginal adaptation of Class V composite restorations.

Statement Of The Problem: Several techniques are proposed for the restoration of Class V cavities but there is no agreement in the literature as to which technique is more effective.

Purpose: To evaluate the effect of different techniques of composite increment placement on the marginal adaptation of Class V restorations.

Methods And Materials: Twenty-four human molars were selected and prepared with standardized saucer-shaped cavity dimensions of 3.

Effect of different ceramic surface treatments on resin microtensile bond strength.

Purpose: The objective of this study was to evaluate the effect of different surface treatments on the microtensile bond strength (micro-tbs) of composite bonded to hot-pressed ceramic. The null hypothesis tested was that neither of the surface treatments (silanization or fluoric acid etching) would produce greater bond strength of composite resin to the ceramic.

Materials And Methods: Four 7 x 7 x 5 mm hot-pressed ceramic blocks of IPS Empress 2 were fabricated and polished to 600 grit followed by sandblasting with 50 microm alumina.

Reestablishing biologic width with forced eruption.

Maintenance of gingival health is one of the keys for the longevity of teeth, as well as for the longevity of restorations. In this context, the biologic width functions as a barrier against the entrance of microorganisms into the internal medium of the periodontal ligament and into the gingival and osseous connective tissue. This clinical case describes a technique to reestablish the biologic width of a central incisor using forced extrusion and done without post-treatment corrective surgery.

Direct adhesive restoration of anterior teeth: Part 3. Procedural considerations.

Direct composite restorations represent a minimally invasive, aesthetic treatment option. The development of contemporary bonding procedures has allowed for improved aesthetics and restorative success. Incorporation of predictable adhesive protocols will increase the restoration's longevity and durability.

Direct adhesive restoration of anterior teeth. Part 1. Fundamentals of excellence.

Contemporary composite resin materials have significantly evolved, facilitating the delivery of aesthetic and functional restorations. The predictability of this treatment modality has been significantly improved by the introduction of adhesive protocols. This three-part series proposes a simplified protocol and the fundamentals for minimally invasive, aesthetic, direct adhesive restorations of anterior teeth.

Diagnosis and management of maxillary incisors affected by incisal wear: an interdisciplinary case report.

Unlabelled: In the attempt to restore anterior teeth affected by erosion and bruxism, many clinicians have been frustrated with the constant restorative failures. Frequently, these failures are attributed to the restorative materials employed, especially in cases in which composite resins are used. However, some flaws of the restorations are related to the oversight of occlusal principles.