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Editorial
Diversity: A Blessing or a Curse?
Research
Mechanical Properties of Compomer Restorative Materials
Clinical Relevance:
Results of compressive strength, flexural strength, and microhardness testing revealed the following ranking of tested materials: resin-modified glass ionomer (Vitremer) was less than compomers (Compoglass, Dyract, and Hytac, which had the highest overall values) were less than composite (Z100).
Two-Year Clinical Performance of a Resin-modified Glass-ionomer Restorative Material.
Clinical Relevance:
A resin-modified glass-ionomer restorative material was an effective restoration of cervical abrasion/abfraction lesions and was approximately equal in clinical performance to its chemically cured predecessor.
Fluoride Release from Some Dental Materials in Different Solutions.
Clinical Relevance:
The cariostatic potential of dental materials that release fluoride can change depending on the media used to evaluate them.
Radiopacity of Compomers, Flowable and Conventional Resin Composites for Posterior Restorations.
Clinical Relevance:
Utilization of materials ranked more radiopaque than enamel would enable clinicians to distinguish the initial increment of a posterior resin composite restoration from tooth structure.
Retention of Microfilled and Hybrid Resin-based Composite in Noncarious Class 5 Lesions: A Double-blind, Randomized Clinical Trial.
Clinical Relevance:
At 12 months, no difference was found in the proportion of restorations retained between two groups of subjects, one group whose restorations were placed using a microfilled composite and the other a small-particle hybrid composite.
Effect of Curing-Tip Diameter on the Accuracy of Dental Radiometers.
Clinical Relevance:
Some commercially available radiometers are poor indicators of the actual irradiance generated by visible-light polymerization units.
Hardening of New Resin Cements Cured through a Ceramic Inlay.
Clinical Relevance:
Among a group of eight dual-cure resin cements, some had hardness values obtained through self-curing less than 50% of those obtained through dual-curing. Ceramic inlay thickness of more than 2 mm inhibited maximum hardening of a number of the cements.
Fracture Strength of Class 2 Amalgams with Various Cavity-lining Materials.
Clinical Relevance:
The fracture resistance of class 2 amalgam restorations is not affected by the presence of a 0.5 mm-thick material lining the approximal box of a cavity preparation when a 3 mm-thick bulk of amalgam remains over the material.
Bond Strength of Composite to Enamel and Dentin Using Primer & Bond 2.1.
Clinical Relevance:
High bond strengths of composite to enamel and dentin can be achieved using one-component adhesive systems.
Abstracts
Book Reviews
Editorial
Research
Thickness and Morphology of Resin-infiltrated Dentin Layer in Young, Old, and Sclerotic Dentin.
Clinical Relevance:
Sclerotic and old dentin are relatively acid-resistant substrates that resist resin infiltration, especially in superficial dentin. Of the dentin bonding systems tested, Prime&Bond 2.0 produced the thickest resin-infiltrated dentin layers in sclerotic dentin.
Study of the Shear Bond Strength of Five One-Component Adhesives under Simulated Pulpal Pressure.
Clinical Relevance:
As the storage time increased, combined with simulated pulpal pressure, there was a significant decrease in the shear bond strength for all the adhesive systems used.
Effect of Dentin Primer Application on Regional Bond Strength to Cervical Wedge-shaped Cavity Walls.
Clinical Relevance:
Multiple primer applications when using Clearfil Liner Bond II improved bond strength to cervical dentin.
In Vitro Microleakage of Glass-Ionomer Composite Resin Hybrid Materials.
Clinical Relevance:
Microleakage of glass-ionomer composite resin hybrid materials placed on root surface cavities did not reveal significant differences when compared to composite resin. Two polyacid-modified composite resins and a resin-modified glass ionomer showed less microleakage than a conventional glass-ionomer cement.
The Effect of Surface Treatment on the Bond Strength of Resin Composite to Dentin.
Clinical Relevance:
Etching of dentin with a strong acid does not always lead to strong bonding.
Surface Treatment of Mercury-free Alloys.
Clinical Relevance:
The mercury-free metal restorative materials, gallium alloy and consolidated silver, can be polished with instruments and techniques similar to those used for conventional amalgam.
Successful Photocuring: Don't Restore without It.
Clinical Relevance:
Photocuring is becoming an integral part of restorative dentistry. Proper curing-light function must be understood, monitored, and maintained to assure successful photocuring of restorative materials within a prescribed time.
Glass Ionomers: A Review of Their Current Status.
Awards
Clinician of the Year Award:
Distinguished Member Award:
Editorial
A Dream of Preservative Health
Research
Effect of Cutting Instruments on Permeability and Morphology of the Dentin Surface.
Clinical Relevance:
Dentin bonding agents may have their effectiveness reduced when the dentin has been cut with diamond burs.
Marginal Adaptation of heat-pressed Glass-Ceramic Veneers to Dentin in Vitro.
Clinical Relevance:
High-viscosity composite resin cements used with their matching bond system provide good marginal adaptation of ceramic veneers both to enamel and to dentin.
Dentin Bond Strength and Marginal Adaptation: direct Composite Resins versus Ceramic Inlays.
Clinical Relevance:
Precuring the adhesive resin proved to be an important factor in direct composite restorations, but is not necessary for luting ceramic inlays. Recent one-bottle adhesives performed poorly compared with multi-step systems.
Shear Bond Strength of Repaired Composite Resins Using a Hybrid Composite Resin.
Clinical Relevance:
The hybrid composite resin produced minimally adequate shear bond strength when it was used to repair the composite resins used in this study.
Microleakage of a Consolidated Silver Direct Filling Material.
Clinical Relevance:
The microleakage associated with an experimental mercury-free consolidated silver is less than that measured with spherical and dispersed-phase amalgams. The consolidated silver also appears to perform well when using copal and polyamide cavity varnishes.
Self-Etching Primer versus Phosphoric Acid: An Alternative Concept for Composite-to-Enamel Bonding.
Clinical Relevance:
Measurement of shear bond strength and analysis of marginal adaptation in class 2 composite resin restorations indicate that self-etching priming agents are effective in composite-to-enamel bonding without phosphoric acid pretreatment.
Nanoleakage at the Dentin Adhesive Interface vs Microtensile Bond Strength.
Clinical Relevance:
Overetching dentin with 35% phosphoric acid revealed no effect on short-term dentinal bond strength values but showed an increase in nanoleakage that raised concern about the long-term hydrolytic stability of resin and collagen fibrils in the resin-infiltrated dentin.
Awards
Award of Excellence
Operative Pearls
E-Z Gold to Restore Contact in a Porcelain Crown (Bridge)
Editorial
Research
Sealing and Dentin Bond Strengths of Adhesive Systems.
Clinical Relevance:
A perfect seal to water seems impossible with current adhesive materials.
Effect of Bonded Amalgam Restorations on Microleakage.
Clinical Relevance:
Microleakage was significantly reduced when Amalgambond Plus and All-Bond 2 were used as liners in comparison to either Copalite varnish or no liner under amalgam restorations.
Retention and Shear Bond Strength of Two Post Systems.
Clinical Relevance:
As a result of the high incidence of root fractures with each post system, especially the C posts, clinicians must evaluate each restorative situation and choose the system best suited for that circumstance.
Quantitative Microleakage Evaluation around Amalgam Restorations with Different Treatments on Cavity Walls.
Clinical Relevance:
The use of hydrophilic adhesive systems or glass ionomer/composite resin hybrid materials on cavity walls before the restoration may help to reduce microleakage around freshly packed amalgam restorations.
Bond Strength of Composite to Dentin Treated by Air Abrasion.
Clinical Relevance:
Air abrasion is an effective method of dentin surface conditioning prior to adhesive bonding and is able to produce bond strength values comparable to acid etching.
Marginal Adaptation of Heat-pressed Glass-Ceramic Veneers to Class 3 Composite Restorations in Vitro.
Clinical Relevance:
Class 3 composite restorations did not significantly influence the marginal adaptation of adjacent ceramic veneers.
A Method for Mounting Natural Teeth in a Commercial Dentoform.
Awards
Hollenback Prize for 1999
Abstracts
Book Reviews
Editorial
Where is the Next Generation of Dental Academics?
Buonocore Memorial Lecture
Thoughts on Contemporary Restorative Materials
Research
Total Bonding vs Selective Bonding: Marginal Adaptation of Class 2 Composite Restorations.
Clinical Relevance:
Although microleakage at the cervical margin was not prevented by either method tested, total bonding may be a suitable alternative to selective bonding when using certain materials.
Water Storage Effect on the Marginal Seal of Resin-modified Glass-Ionomer Restorations.
Clinical Relevance:
Polishing glass-ionomer restorations at the second appointment appears to be most appropriate, since the marginal gap is significantly reduced after 1 day in water storage for both of the two glass-ionomer materials used in this study.
Evaluation of Antibacterial Activity of Three Dentin Primers Using an in Vitro Tooth Model.
Clinical Relevance:
Although all dentin primers showed antibacterial activity, ED primer exhibited the strongest effect among three primers on both the in vitro tooth model and disk diffusion method.
Antibacterial Activity of Glass-Ionomer Restorative Cements Exposed to Cavity-producing Microorganisms.
Clinical Relevance:
The confirmed antibacterial action of glass-ionomer cements may provide protection from the microorganisms involved in enamel caries as well as root caries.
Color of Restorative Materials aafter Staining and Bleaching.
Clinical Relevance:
The bleaching agent tested removed stains from the composite and the hybrid ionomer but not the compomer.
Flouride Release and Antibacterial Properties of New-Generation Tooth-colored Restoatives.
Clinical Relevance:
For the materials investigated, the conventional glass-ionomer cement released significantly more fluoride than fluoride-releasing composites, compomers, or the resin-modified glass-ionomer cement. There was no correlation noted between fluoride-release potential and antibacterial properties.
Polymerization Color Changes of Esthetic Restoratives.
Clinical Relevance:
All materials evaluated undergo color changes during polymerization. Therefore, the clinical practice of polymerizing some material on, or adjacent to, the undried tooth to confirm shades of esthetic restoratives before restorative procedures is prudent.
Digital Radiology and Image Analysis for Approximal Caries Diagnosis.
Clinical Relevance:
Radiovisiography proved useful in the diagnosis of simulated early incipient approximal caries.
Editorials
Where Has Excellence Gone?
Research
Effect of Mechanical Properties of Resin Composites on the Efficacy of the Dentin Bonding System.
Clinical Relevance:
Higher tensile bond strengths cannot be used to predict improved marginal adaptation of composite restorations.
Evaluation of Different Methods for Cleaning and Preparing Occlusal Fissures.
Clinical Relevance:
Teeth prepared with the #1/4 round bur and air abrasion demonstrated a better marginal seal.
Cuspal Deflection of Maxillary Premolars Restored with Bonded Amalgam.
Clinical Relevance:
Bonded MOD amalgam restorations decreased cuspal deflection of maxillary premolars, which confirms their potential for tooth strengthening.
Influence of Two Dentin Bonding Systems on the Demineralization of the Root Surface.
Clinical Relevance:
The application of dentin adhesives on exposed root surfaces is possibly a caries prophylactic preventive measure.
Effect of Saliva contamination on the Bond of Dentin to Resin-modified Glass-Ionomer Cement.
Clinical Relevance:
Salivary contamination adversely affects the adhesion of resin-modified glass-ionomer cement to dentin. Rinsing and re-etching the dentin failed to result in strength as great as to noncontaminated dentin, indicating the importance of moisture control when using these materials.
Human-Eye versus Computerized Color Matching.
Clinical Relevance:
Differences in color matching between human-eye assessment and computerized colorimetry is shade dependent.
Cuspal reinforcement in Endodontically Treated Molars.
Clinical Relevance:
When restoring endodontically treated mandibular molars with intact facial cusps, horizontal pins in combination with an amalgam adhesive may be used to reinforce the facial cusps, permitting the use of an esthetically conservative MODL amalgam restoration without incurring significant risk of cuspal fracture.
Effects of Aging on Repair Bond Strengths of a Polyacid-modified Composite Resin.
Clinical Relevance:
After 3 and 6 months of aging, surface conditioning with sandblasting and resin application resulted in the highest repair bond strength for the repair of polyacid-modified composite resins.
Clinical Article
Amalgam Restsorations: Postoperative Sensitivity as a Function of Liner Treatment and Cavity Design.
Clinical Relevance:
Cavity depth does not seem to affect postoperative sensitivity of amalgam restorations.
Book Review
(C) Operative Dentistry, 1999