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ONLINE ONLY ARTICLES

Direct composite veneers are a viable approach to improve the color and esthetics of darkened anterior teeth. Additionally, composite resin veneers are not negatively affected by dark substrates over time.

One frequent clinical complication related to zirconia restorations is decementation. Immediate dentin sealing could increase the bond strength of zirconia to dentin when self-adhesive cements are used.

A single session of in-office bleaching before home treatment yielded limited reduction in time to obtain a satisfactory bleaching effect compared with home treatment alone and could increase the risk and level of tooth sensitivity reported by patients.

Since breakage is one common reason for restoration failure, the ability to withstand fracture is crucial for the clinical success of dental restorative materials.

Adhesive systems doped with epigalocatechin-3-gallate, directly or in poly(D-L lactide-co-glycolide) acid microparticles, do not have a detrimental effect on restorative procedures.

CLINICAL TECHNIQUE/CASE REPORT

Class V lesions can be extremely difficult to restore, particularly when the cavity margins are covered by soft tissue. It is possible to isolate and make access to the cavity easier, with a nontraumatic technique.

CLINICAL RESEARCH

CO2 laser irradiation was effective in controlling bleeding and exudate from mechanically exposed pulp. Dentin bridge formation in teeth capped with CO2 laser was equivalent to that in teeth capped with calcium hydroxide cement at 12 months posttreatment.

When repairing aged (old) composite, etching with phosphoric acid for 20 seconds does not appear to improve composite-composite repair strength. Composite and adhesive types have a significant effect on composite-composite repair strength. When repairing aged (old) composite, matching the repair composite to the old composite that is being repaired appears to make no difference.

Discoloration in composite restoration margins does not indicate the presence or predict the development of recurrent caries over five years in a low- to moderate-risk population. Discoloration at composite resin margins can be repaired to improve esthetics, but it is likely to return at a decreasing rate over time.

LABORATORY RESEARCH

Clinicians should be aware that regardless of the uniformity of the wavelength distribution of beam emissions from multiwave LEDs, violet emittance at 380-420 nm is not capable of being transmitted with depth equivalent to that of blue light.

To enhance the adhesion between zirconia restorations and self-adhesive resin cements (SARC), clinicians need to consider the use of zirconia primer. If using MDP-containing SARC, then zirconia primer is not necessary. If using non–MDP-containing SARC, then zirconia primer is recommended.

Monobond Etch & Prime and Monobond Plus showed comparable tensile bond strength results. Only a few universal adhesive systems provided reliable values for all ceramics tested. Thus, the clinician needs to individualize the selection of the adhesive system for each ceramic.

Amine-free cements may be an alternative selection for esthetic longevity of ceramic veneers. Resin cements containing only diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide might impair bond strength of the restoration in comparison to other photoinitiator systems and combinations.

Red fluorescence measurement may be useful for objectively evaluating activity in smooth surface caries lesions.

The enzymatic activation of hydrogen peroxide–based bleaching agents with peroxidase optimizes tooth whitening and diminishes the diffusion of residual subproducts capable of damaging pulp tissue, which may prevent postbleaching tooth sensitivity in vivo.

The addition of calcium and fluoride in high-concentration hydrogen peroxide gel might be a viable alternative to decrease the negative effects of hydrogen peroxide on enamel microhardness and peroxide diffusion without impairing bleaching efficacy.

The use of a glass fiber reinforced composite may result in more repairable failures when severely compromised endodontically treated molars are restored.

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