Dental Bonding ; methods ; Dentin ; Dentin-Bonding Agents ; chemistry ; Electricity ; Humans

Dental bonding technique has become an essential technique for dental clinical practice over the past several decades. Dental adhesion is widely used in direct and indirect restorations. However, problems such as technique sensitivity, postoperative sensitivity, secondary caries and marginal discoloration always appear in the dental bonding procedures. Fiber post and all-ceramic restoration bonding are essential step in esthetic dentistry. If these problems are not well handled, it will result in failure of the restorations. Therefore, the aim of this article is to provide adequate consultations and advice for the clinical practitioners based on the author's experience and relevant literatures.
Ceramics ; Dental Bonding ; Dental Caries ; Dental Restoration Failure ; Humans

Noncarious cervical sclerotic lesions (NCSL) are dental cervical lesions with noncarious sclerotic dentine (NCSD), which appears smooth, hard, and either light yellow or dark brown. Most NCSLs are wedge or dish shaped and commonly occur in canines and premolars, leading to dental hypersensitivity and aesthetic defect. The principal treatment is composite resin restoration; however, many clinical problems, such as retention loss, should not be ignored. NCSL's bonding interface includes NCSD and enamel, and interface pre-treatment can promote the bonding effect. This review summarizes current surface treatment methods and their influence on the bonding effectiveness of NCSL to provide guidance for clinical practice.
Acid Etching, Dental ; Composite Resins ; Dental Bonding ; Dental Restoration, Permanent ; Dentin-Bonding Agents ; Tooth Cervix

No abstract available.
Dental Porcelain* ; Dentin* ; Dentin-Bonding Agents*

The bonding restoration has become an important clinical technique for the development of dental bonding technology. Because of its easy operation and the maximum preservation of tooth tissues, bonding repair is widely used in dental restoration. The recent multi-mode universal adhesives have brought new progress in dental bonding restoration. In this article the universal adhesives were reviewed according to its definition, development, improvement, application features and possible problems.
Adhesives ; administration & dosage ; Dental Bonding ; methods ; Dentin-Bonding Agents ; Humans ; Technology, Dental

OBJECTIVEThis study aims to evaluate the bond strength of a self-adhesive resin cement to dentin by ethylene diamine tetraacetic acid (EDTA) and NaClO.

METHODSTwenty-seven freshly extracted non-carious human premolars were prepared to expose the buccal dentin and randomly divided into three groups: control group (A group), EDTA group (B group) and NaClO group (C group). All teeth were bonded to dentin using a self-adhesive resin cement after the teeth in the A group were processed with distilled water. The B and C group were processed with 3%EDTA and 1%NaClO, respectively. After 24 hours at 37 °C water, the shear bond strengths of the twenty-four specimens were measured. All statistical analysis was performed using SPSS 17.0 software package. Each fractured specimen was examined under dental microscope. Three new specimens were cut, and the morphologies of the cement-dentin interface were observed under scanning electron microscope (SEM).

RESULTSThe shear bond strength in the A group, B group and C group was (8.55±0.63), (8.47±0.56) and (12.97± 0.59) MPa, respectively. The difference between A group and B group was no statistically significant (P>0.05), whereas the difference between C group and B group (or A group) was statistically significant (P<0.05). SEM observation of the cement-dentin interface in the C group showed good adaptation, but resin tags were not observed. The other two groups showed poor bonding interface. Most of the fractured adhesive dentin surfaces exhibited cohesive failure in the A group and B group. All the fractured adhesive dentin surfaces exhibited cohesive failure in the C group.

CONCLUSION1% NaClO can increase the bond strength of self-adhesive resin cement to dentin, but 3%EDTA has no effect.

Adhesives ; Dental Bonding ; Dental Stress Analysis ; Dentin ; chemistry ; Dentin-Bonding Agents ; Detergents ; chemistry ; Humans ; Resin Cements

OBJECTIVETo evaluate the coronal microleakage of teeth restored with fiber posts and composite cores with four different resin bonding systems.

METHODSSixty extracted human maxillary single-rooted teeth were endodontically treated and randomly divided into four groups. Post spaces were prepared in the root canals. Four different resin bonding systems (RelyX Unicem, Dulink, DC core Automix, Luxacore) were used respectively to bond fiber posts and reconstruct cores. The specimens were immersed in India ink for one week. Subsequently all teeth were demineralized, dehydrated and rendered transparent. Then microleakage was observed with stereomicroscope.

RESULTSThe microleakage degrees among four resin bonding systems were significantly different (P = 0.007), and group C showed the least microleakage compared with the other three.

CONCLUSIONSelf-etching resin bonding systems have a super margin sealing ability.

Composite Resins ; Dental Bonding ; Dental Leakage ; Dentin-Bonding Agents ; Humans ; Post and Core Technique ; Resin Cements

OBJECTIVETo evaluate the effect of desensitizer on shear bond strength of adhesive system.

METHODSTwenty specimens were made and divided randomly into an experiment group and a control group. In the experiment group, the dentin bonding surface was applied with Green Or and in the control, the dentin bonding surface was untreated. The IPS-Empress specimens were bonded to the dentin bonding specimens using Variolink II adhesive system. The shear bond strength of all testing samples was determined with Instron testing machine. The surfaces of the drawing sections were observed using the scanning electron microscope (SEM).

RESULTSThe shear bond strength of the experimental group and the control group was (5.53 +/- 0.96) MPa and (7.32 +/- 1.34) MPa respectively and there was statistically significant difference between two groups (P = 0.003). In the experimental group, adhesive failure was the most prevalent type of failure, while in the control group, cohesive failure was the most prevalent type.

CONCLUSIONSThe application of Green Or on the dentin bonding surface decreased the shear bond strength between dentin and IPS-Empress specimens when using Variolink II adhesive system.

Dental Bonding ; Dental Stress Analysis ; Dentin-Bonding Agents ; chemistry ; Materials Testing ; Resin Cements ; chemistry ; Surface Properties

OBJECTIVETo compare the microleakage of compomer sealant with non-rinse conditioner and resin sealant with phosphoric acid (35%) by dye test and scanning electron microscope (SEM) observation.

METHODS16 extracted third permanent molars were divided into 4 groups: Group I, non-rinse conditioner (NRC) + Prime & Bond NT + Dyract seal; Group II, phosphoric acid (35%) + Concise sealant; Group III, phosphoric acid (35%) + Dyract seal; Group IV, NRC + Prime & Bond NT + Concise sealant. The teeth were then coated with nail polish, placed in a 50% AgNO3 dye for 18 hours, and sectioned with a diamond saw. SEM observation was performed to evaluate microleakage in the teeth.

RESULTSSilver nitrate penetration was found in each group. The percentage of microleakage in group I was higher than that in group II, and group IV was higher than that in group II (P < 0.01). The percentage of microleakage of resin sealant with phosphoric acid was lower than that in compomer sealant with NRC (P < 0.01). On SEM observation, resin tags and few gaps were found in groups with phosphoric acid. Some gaps and bubbles were found at the bottom of the fissures, particularly in the narrow fissures because of the failure of sealant penetration.

CONCLUSIONResin sealant used with phosphoric acid was better than compomer sealant with NRC on microleakage.

Acid Etching, Dental ; Compomers ; Dental Bonding ; Dentin-Bonding Agents ; Humans ; Maleates ; Molar ; Phosphoric Acids ; Polymethacrylic Acids

As a convenient and effective surface modification approach, non-thermal atmospheric pressure plasma (NTAPP)can be used to improve dentin bonding, and has recently become a research focus. Studies have shown that NTAPP can alter dentin surface properties, improve the penetration and polymerization of adhesives, stimulate the cross-linking of collagen, and change the micro-morphology and element content of dentin surface, thus improve the dentin bonding quality. This article introduces the current research progress in the application of NTAPP in the field of dentin bonding, in order to provide innovative information for future research in optimization of the quality of dentin bonding.
Dental Bonding ; Dental Cements ; Dentin ; Dentin-Bonding Agents ; Materials Testing ; Plasma Gases ; Resin Cements ; Surface Properties