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At least 1,171 records · Page 65Linked to original sources
PubMed2004

Durability of FTLA treatment as a medicament for dentin hypersensitivity--abrasion resistance and profiles of fluoride release.

The purpose of this study was to evaluate the durability of tubules occluded with FTLA treatment by toothbrush abrasion test on the applied surface and by measuring fluoride release from the FTLA components. Dentin specimens with simulated hypersensitive surfaces were treated with APF containing tannic acid. After which, the specimens received lanthanum-chloride-with-powdered-fluoroapatite-glass-ceramics treatment. The specimens were subjected to toothbrush abrasion test up to 6,000 strokes. SEM observation revealed that dentinal tubules of the FTLA treated specimens were completely occluded with fine deposits even after toothbrush abrasion of 6,000 strokes. EPMA analysis revealed that fluoride, lanthanum, and aluminum were the main FTLA components on the dentin surface after 6,000-stroke abrasion. To measure fluoride release from the FTLA components, a slurry was enclosed in a cellulose tube and suspended in deionized water at 37 degrees C. After fluoride was dialyzed against deionized water, a high concentration of fluoride was found to be released from FTLA the components, indicating FTLA treatment's prominent durability. These results suggested that FTLA treatment has a superior resistance against toothbrush abrasion and a high fluoride-releasing performance. These characteristics lend much weight to showing that the FTLA method is an effective and durable medicament for dentin hypersensitivity.

Acidulated Phosphate Fluoride↗
PubMed2000

[A clinical evaluation of two new materials for restoration of dental wedge-shaped defects].

OBJECTIVE: To evaluate clinically two new materials (Dyract Cem and 3M-Vitremer) for restoration of dental wedge-shaped defects with modified USPHS evaluation criterion. METHODS: 317 teeth with wedge-shaped defects were restored by Dyract Cem and 192 teeth by 3M-Vitremer clinically. The 1 year and 2 year follow-up results were evaluated with modified USPHS evaluation criterion. RESULTS: 1 year successful rate was 91.17% in Dyract Cem group and 81.77% in 3M-Vitremer group, and 2 years successful rates were 88.64% and 80.21% separately. The differences of successful rates between the two groups are significant statistically, but there are no significant differences in main indexes except stain rate when analysed item by item with USPHS evaluation criterion. Successful rates were related with the abrasive degree of the restored teeth. CONCLUSIONS: Both Dyract Cem and 3M-Vitremer have high successful rates and a lot of advantages for restoration of dental wedge-shaped defects. The modified USPHS evaluation criterion is a valuable method for clinical evaluation.

Adult↗
PubMed1981

A mastication device designed for the evaluation of chewing gums.

A mechanical device designed to simulate the human mastication of chewing gum was used to evaluate the enamel polish, dentin abrasion, and reduction in enamel solubility produced by several commercial gums, as well as experimental gums incorporated with various additives. The results demonstrated that this mastication device was suitable for evaluating in vitro the physical and chemical effects of chewing gums on teeth.

Chewing Gum↗
PubMed1979

[Composites versus amalgam: comparative measurements of abrasion resistance in vivo: 1-year results].

A method for the in-vivo measurement of wear resistance of restorative materials is described. A profilometer is used to record the reduction in vertical dimension of the test material's occlusal surface. This loss of substance is calculated as the wear resistance index. The technique was used in a 13 month clinical evaluation of 3 different restorative materials, Adaptic, Amalgam (Dispersalloy) and Estic microfill. The procedure is simple in execution and very accurate. Statistical analysis has shown significant differences in wear resistance of the examined materials independent of patient variation. Attrition and abrasion were definitely greater with a standard composite material (Adaptic) than with amalgam and a test composite (Estic microfill). The newly developed composite material utilizing extremely fine filler particles of pyrogenic SiO2 (Estic microfill) was shown to be comparable to amalgam in wear resistance during the 13-month test period.

Adult↗
PubMed1979

Studies of prophylaxis pastes containing sodium-potassium aluminum silicate and fluoride.

A sodium-potassium aluminum silicate cleaning and polishing agent was compared with conventional prophylaxis abrasives and was found to be highly compatible with fluoride. When formulated into a fluoride prophylaxis paste, especially with stannous fluoride, a larger reduction in enamel solubility and greater fluoride uptake were obtained with representative commercial prophylaxis pastes.

Aluminum Silicates↗
PubMed1991

The surface roughness of enamel-to-enamel contact areas compared with the intrinsic roughness of dental resin composites.

The purpose of this study was to determine the surface roughness of enamel-to-enamel contact areas in order to provide a standard for comparison with surface characteristics of commercially available composite restorative materials. In addition, the inherent surface roughness of resin composites was evaluated profilometrically after a toothbrush abrasion procedure. A one-sided t-test analysis was performed to outline significant differences between the surface roughness value of enamel facets and that of the respective composite samples. A surface roughness of 0.64 +/- 0.25 micron (mean +/- S.D.) was found for the enamel-to-enamel contact areas.

Bicuspid↗
PubMedDate not supplied

Fabricating a gold occlusal platform on a removable partial denture to help prevent extrusion of mandibular incisors.

A clinical procedure is presented in which a maxillary removable partial denture replacing anterior teeth was fabricated with a cast gold anterior occlusal platform. This treatment is indicated to correct abrasion caused by extruded mandibular anterior teeth on the maxillary removable partial denture. The advantages compared to prosthetic teeth supported by an acrylic resin base or metal-backed facings are discussed. This technique allows for development of optimal esthetics, strength, and durability while preventing further extrusion and excessive wear of the teeth occluding against prosthesis.

Denture Design↗
PubMed1989

Dentin abrasion (RDA), enamel abrasion (REA) and polishing scores of dentifrices sold in Switzerland.

Assessments of the abrasion of hard dental tissues produced by different dentifrices are usually carried out on extracted teeth in the laboratory. The tests most commonly used to measure dentifrice abrasion on dentin and enamel are the radiotracer (radio-active) and profilometry methods. The radiotracer dentin (RDA) and enamel (REA) abrasion scores of the 32 dentifrices were determined using the ADA specifications. RDA and REA scores are related to a standard abrasive, calcium pyrophosphate (Ca2P2O7), which is assigned a score of 100 for the RDA method and 10 for the REA method. The same abrasive was used as the standard in the enamel polish study and assigned a score of 100. The RDA scores of the dentifrices tested varied from 37 to 203, the REA scores from 1.0 to 11.7, and the polishing scores ranged from 19.63 to 96.88. Half the dentifrices tested had RDA scores below 100.

Dental Enamel↗
PubMed1985

Bruxism and its effect on the natural teeth.

Bruxism is one of the most prevalent, complex, and destructive dental functional disorders. It is difficult to identify, especially in its early stages, because most patients are unaware of the habit. Although many factors contribute to the etiology of the disorder, there is little valid and reliable clinical research to assure a correct diagnosis. The effects of bruxism are multiple and diverse and include temporomandibular joint pain and dysfunction, head and neck pain, tooth wear, mobility, erosion, abrasion, loss of and damage to supporting structures, muscle pain and spasm, disturbance of esthetics, and interference and oral comfort. Treatment may be simple or complex, depending on the nature of the disorder. More severe disorders are difficult to treat, and the prognosis may be questionable. Because the diagnosis and treatment of bruxism is inadequately defined and poorly understood, carefully designed clinical research projects are encouraged.

Bruxism↗
PubMed1999

Fabricating a gold occlusal platform on a removable partial denture to help prevent extrusion of mandibular incisors.

A clinical procedure is presented in which a maxillary removable partial denture (RPD) replacing anterior teeth was fabricated with a cast gold anterior occlusal platform. This treatment is indicated to correct abrasion caused by extruded mandibular anterior teeth on the maxillary RPD. The advantages compared with prosthetic teeth supported by an acrylic resin base or metal-backed facings are discussed. This technique allows for development of optimal esthetics, strength, and durability, while preventing further extrusion and excessive wear of the teeth occluding against prosthesis.

Dental Occlusion, Traumatic↗
PubMed2006

Effect of low O2-gas transmission rate barrier films on knoop hardness and toothbrush abrasion of resin cements.

PURPOSE: To investigate the influence of utilizing films with different oxygen transmission rates (O2-GTR) on Knoop hardness and toothbrush abrasion of resin cements for luting. METHODS: Four dual-activated, composite-type resin cements, and a chemically activated PMMA-type resin cement, were used. Three different types of barrier films (Techbarrier HI, Harden Film N130, and Lix-2) were used. Resin cement was mixed and inserted into a cylindrical mold (4 mm in diameter, 3 mm in height), then chemically activated. The specimens were stored in the dark at 37 +/- 1 degrees C, 90 +/- 5%RH conditions for 1 hour. Knoop hardness on the top surface of the resin cement was measured with a microhardness tester. The top surface of specimens (8 mm in diameter, 3 mm in height) polymerized under the same conditions were used for toothbrush abrasion testing. One-way ANOVA followed by Tukey HSD test (P< 0.05) were done. RESULTS: When the cement surface was covered by low O2-GTR film, a significant increase in Knoop hardness and resistance to toothbrush abrasion was observed for the dual activated, composite-type resin cements, but not for the chemically activated PMMA type resin cement. From the results of this study, the use of low O2-GTR matrix barrier films for the dual activated, composite-type resin cements could be effective in eliminating the oxygen inhibited layer on the cement surface.

Hardness↗
PubMed2004

[Clinical using and observation of occlusion splint of RPD].

PURPOSE: This article describes the design and restoration for 180 cases diagnosed with dentition defect accompanied with medium to severe abrasion and attrition. The purpose of this study is to discuss the rehabilitation of vertical dimension, the balance of occlusion and the whole occlusion system. METHODS: Before clinical preparation of the 180 clinical cases, diagnostic casts were made. Entire restoration treatment plan was adopted to make removable partial dentures with full crown restorations along with occlusion splints. The clinical effect were evaluated at 2nd week, 4th week and 9th week. RESULTS: Of the 180 cases, 148 patients (82.2%) adapted to the denture in 2-3 weeks, 24 patients (13.3%) in 4-5 weeks, 8 patients (14.5%) in 5-6 weeks. The further observation were evaluated over 10-15 years with clinical satisfaction. CONCLUSION: This method not only reserves the tooth structure, but also restores configuration and function of the lost tissues. It's really a constantly effective remedy.

Adult↗
PubMed1995

Abrasive particles in tobacco products: a possible factor in dental attrition.

Tobacco products are known to cause oral soft-tissue lesions, but they may also directly affect the teeth. Abrasive particles contained in tobacco products may contribute to dental attrition. We studied tobacco samples from 16 brands of cigars, eight brands of snuff, four brands of chewing tobacco and several unprocessed tobacco leaves used as cigar wrappers. Insoluble particulate matter made up about 0.5 percent of the weight of an average tobacco sample.

Electron Probe Microanalysis↗
PubMed2003

Wear and superficial roughness of glass ionomer cements used as sealants, after simulated toothbrushing.

The purpose of this study was to evaluate, in vitro, the properties (wear and roughness) of glass ionomer cements that could influence their indication as pit and fissure sealants. The utilized materials were Fuji Plus, Ketac-Molar and Vitremer (in two different proportions: 1:1 and :1). The resin-based sealant Delton was used as control. By means of an electronic balance (precision of 10-4 g), wear was measured in function of weight loss after simulated toothbrushing. Superficial roughness was determined by means of a surface roughness-measuring apparatus. The results revealed that diluted Vitremer and Fuji Plus were less resistant to toothbrushing abrasion and had the greatest increase in superficial roughness. Although in clinical situations luting or diluted ionomer cements are often utilized as alternatives to resin-based sealants, the resultsof this study revealed that the properties of those cements are worse than those of restorative ionomers, whichpresented results similar to those of the evaluated resin sealant.

Dental Restoration Wear↗
PubMed1983

The significance of cusps.

It has been argued that the prolonged retention of cusps in the human dentition is a relatively recent aberration due to the negligible abrasiveness of modern diets and that to achieve maximum efficiency and freedom from disease human teeth should be worn down as they are in many herbivorous mammals. Here we critically review the evidence that has been put forward to support this idea and, after discussing the design of occlusal surfaces in relation to the wide variety of mammalian diets, we conclude that cusps are adaptations for breaking food with specific physical properties.

Animals↗
PubMed1978

[Abrasion-resistant MOD composite fillings made by embedding centric ceramic stops--4 year's results].

The resistance to abrasion of presently available composite restorative materials is unsatisfactory; the utilization of such materials in conventionally prepared occlusal and occluso-proximal stress-bearing restorations has been therefore contraindicated. In a private practice study carried-out between 1972-77, porous triangular-shaped ceramic inserts were polymerized into the centric-stop areas of 528 Class-II composite restorations. Clinical and electron microscopic evaluation have shown a greatly increased resistance to abrasion in the ceramic insert areas as well as no significant attrition of the antagonist cusp. 95% of the restoration were judged functionally and esthetically very satisfactory. Only 1,1% of the inserts demonstrated fracture and partial loss of ceramic material during the test period. The five-year study has shown the procedure to be relatively simple to learn and suitable for private practice application.

Composite Resins↗
PubMed2002

Models for assessing powered toothbrushes.

The continued development of the power toothbrush over the last 25 years has led to some present-day models that demonstrate increased efficacy in plaque removal compared with a manual brush. The wealth of clinical data that supports these claims has a reference to both in vitro and in vivo models. An overview of performance evidence compared with manual toothbrushes must also be considered from a research model view. The issue of power toothbrush safety in relation to soft tissue abrasion will offer an opportunity for the review of the scientific facts behind any fictitious "hype". Specific studies will provide clinical evidence on power toothbrush safety and performance. This paper will consider implications of the evidence for the use of powered toothbrushes in clinical practice and will emphasize the current consensus of clinical opinion in the light of scientific evidence.

Clinical Trials as Topic↗
PubMed1991

Severe abrasion of composite and amalgam restorations in a patient with lupus erythematosus systemic. Case report.

A case of repeated severe abrasion of amalgam and composite resin restorations in a patient under treatment for Lupus erythematosus systemic is reported. The patient had a history of audible nocturnal bruxism. Severe roughening occurred within three weeks of placement of the restorations and was related precisely to surfaces in contact with the opposing restored dentition. Examination by SEM revealed an unusual wear pattern of the amalgam restorations.

Adult↗