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Results for “DENTAL CAVITY LINING”

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At least 811 records · Page 45Linked to original sources
PubMed1993

[Study on dental cement. Part 4. Protective effect of a newly designed light-cured varnish on the vulnerability to water of glass polyalkenoate cement restorations].

The protective effect of a newly designed light-cured varnish on the vulnerability to water of two kinds of glass polyalkenoate cement restorations was examined by determining the penetration depth of Ag ion into the set cement on the SEM pictures in comparison with those of the conventional varnish and a light-cured resin bonding agent. The protective effect of the experimental light-cured varnish was perfect, while those of the conventional varnish and the light-cured resin bonding agent were inferior to that.

Dental Cavity Lining↗
PubMed1999

Effect of different liner treatments on postoperative sensitivity of amalgam restorations.

OBJECTIVE: The purpose of this clinical study was to assess the sensitivity experienced and reported by patients following treatment of primary carious lesions with Class I or Class II amalgam restorations. METHOD AND MATERIALS: Only previously untreated teeth were selected. The cavity preparations were treated according to one of four regimens: group 1 = no liner; group 2 = two coats of a copal varnish; group 3 = a dentin adhesive resin liner; group 4 = a resin-modified glass-ionomer liner. Patients were contacted on days 2 and 7 postoperatively and questioned regarding the presence or absence of sensitivity. If sensitivity was experienced, they were asked which stimuli created the sensitivity, the length of time it lasted, and its intensity on a subjective scale. If sensitivity was experienced on day 7, patients were also contacted on days 14, 30, and 90 to assess the degree of sensitivity. Nineteen teeth were included in each of the four groups. RESULTS: By days 2 and 7, no significant difference existed among groups; by day 14, 22% of restorations in group 2 and 17% of those in group 3 were sensitive, while teeth in groups 1 and 4 exhibited no sensitivity reactions. CONCLUSION: Use of a resin-modified glass-ionomer liner or no dentin treatment resulted in short-term sensitivity in fewer than one third of the teeth. Almost one third of the teeth restored with a dentin adhesive resin liner or copal varnish exhibited initial sensitivity, which lasted up to 30 days in a few teeth.

Adolescent↗
PubMed1997

Esthetic posterior restorations utilizing the double-inlay technique: a novel approach in esthetic dentistry.

The employment of adhesively bonded porcelain or resin composite inlays is considered problematic in Class II cavities extending into the dentin and cannot be recommended as a routine procedure for current clinical practice. A two-part restoration in the form of a double inlay provides an alternative to the clinically established gold inlay restoration. The double inlay is composed of a conventionally cemented metal base and an adhesively bonded porcelain inlay. After the metal substructure is coated with silica or a microretentive opaque glaze is fired, the porcelain inlay can be luted to the metallic base with a bonding resin composite. This procedure incorporates the advantages of cast restorations at the critical cervicoproximal cavity margin and the esthetic and stabilizing properties of the adhesively bonded restoration technique in visible areas.

Bicuspid↗
PubMedDate not supplied

Clinical evaluation of a polyacid-modified resin composite (compomer) in Class II restorations of primary teeth: a two-year follow-up study.

PURPOSE: The aim of the study was to assess the clinical performance of a compomer restorative material (Dyract, DeTrey/Dentsply) for the restoration of Class II cavities, extended into dentin in primary teeth. METHODS: The sample of the study consisted of 25 patients with 68 restored cavities. The restorations were evaluated with the modified Ryge criteria at baseline and after 6, 12 and 24 months. Examination was clinical, radiographic, and observation of cast replicas under scanning electron microscope (SEM). RESULTS: After 24 months, 100% of the restorations were retained, 3% presented bulk fractures, and 6% developed secondary caries at cervical margins. After 24 months, there was a significant reduction in marginal integrity while there was only slight change in anatomic form. Proximal contact was defective in 6% of the restorations and 8% showed marginal discoloration. SEM evaluation revealed a generalized occlusal and scattered marginal wear with no marginal gaps. CONCLUSION: The compomer presented acceptable clinical performance in Class II restorations of primary teeth after 24 months in service.

Calcium Hydroxide↗
PubMedDate not supplied

Microleakage of a consolidated silver direct filling material.

Microleakage of an experimental direct filling material comprised of a chemically precipitated silver powder that had been surface treated with a dilute acid to promote cold welding upon consolidation was evaluated. Microleakage was compared to both dispersed-phase and spherical amalgam by use of an in vitro gas-diffusion method and in class 5 restorations placed in extracted human teeth. The effect of two cavity varnishes and two dentin adhesives as cavity liners on microleakage was also evaluated using extracted teeth. Microleakage of silver powder consolidated with dental instruments was less than that found with dental amalgam. The use of copal or polyamide cavity varnish resulted in the lowest combination of microleakage on dentin and enamel margins.

Analysis of Variance↗
PubMed1976

Diagnosis and treatment of pulpal distress.

Both diagnosis and treatment of vital pulp tissues encompass some fairly comprehensive varieties of methods and materials. Diagnosis is arrived at in terms of probability. No one can be absolutely sure that the diagnosed degree of pulpal distress is in fact the actual state of affairs. Treatment, therefore, must be best be a probability also. There can be no guarantee that the treatment rendered will succeed in every instance. Any diagnosis and treatment of reversible pulpal distress is a gamble on the part of both practitioner and patient. However, utilization of every diagnostic means at his disposal, knowledge of the many treatment modalities available for use, and the ability to correlate both the diagnosis and treatment phases of a given case will result in a high probability of success. This is indeed rewarding to both the patient and the dentist.

Dental Cavity Lining↗
PubMed1976

[Methods of determination of fluoride in trace amounts. Application to the study of the diffusion of fluoride from an amalgam in dental tissues].

The study of fluoride diffusion in dental tissues has been performed by microprobe analysis. The fluoride supply is carried out in vivo by various fluorides added to conventional amalgams. This method differs then from previous work (topical applications, electrophoresis or fluoride solutions) by the study of fluoride penetration from amalgams either in dentine or in deep enamel, which are more susceptible to caries than superficial enamel. These experiments give evidence of a fast penetration of fluoride into dental tissues, which may be characterized by an apparent diffusion coefficient of about 10(-10) cm2/s.

Dental Amalgam↗
PubMed1999

Effects of materials used in pediatric dentistry on the pulp: a review of the literature.

This paper reviews a selection of materials used in treating children's teeth. Often, the success of the material is determined by its effect on the underlying pulp tissue, either by virtue of its direct effect or in its ability to prevent ingress of contaminants. The materials reviewed will include some of those used for cavity liners, bases, restorations, pulp capping, and pulpotomies.

Child↗