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Pesquisa : C07.793.818.124 [Categoria DeCS]
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  1 / 2540 MEDLINE  
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PMID:27305512
Autor:Sales-Peres SH; Xavier CN; Mapengo MA; Forim MR; Silva Mde F; Sales-Peres A
Endereço:Universidade de São Paulo, Universidade de São Paulo, Bauru School of Dentistry, Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru SP , Brazil, Universidade de São Paulo - USP, Bauru School of Dentistry, Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru,
Título:Erosion and abrasion-inhibiting in situ effect of the Euclea natalensis plant of African regions.
Fonte:Braz Oral Res; 30(1), 2016 Jun 14.
ISSN:1807-3107
País de publicação:Brazil
Idioma:eng
Resumo:This study evaluated the effect of Euclea natalensis gel on the reduction of erosive wear with or without abrasion, in enamel and dentin. During two five-day experimental crossover phases, volunteers (n = 10) wore palatal devices containing human enamel and dentin blocks (E = 8 and D = 8). The gel was applied in a thin layer in the experimental group, and was not applied in the control group. In the intraoral phase, volunteers used the palatal appliance for 12 h before the gel treatment, and were instructed to start the erosive challenges 6 h after the gel application. Erosion was performed with Coca-Cola® (for 5 min) 4 times/day. The appliance was then put back into the mouth and was brushed after 30 minutes. After intraoral exposure, the appliances were removed and the specimens were analyzed using profilometry (mean ± SD, µm). The Euclea natalensis gel caused less wear in enamel in the experimental group (EROS = 12.86 ± 1.75 µm; EROS + ABRAS = 12.13 ± 2.12 µm) than in the control group (EROS = 14.12 ± 7.66 µm; EROS + ABRAS = 16.29 ± 10.72 µm); however, the groups did not differ from each other significantly. A statistically significant value was found for erosion and eros + abrasion in dentin (p = 0.001). Euclea natalensis may play a role in the prevention of dentin loss under mild erosive and abrasive conditions. A clinical trial is required to confirm these promising results in a clinical situation.
Tipo de publicação: JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL
Nome de substância:0 (Gels)


  2 / 2540 MEDLINE  
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PMID:27278907
Autor:Lussi A; Schaffner M; Jaeggi T
Endereço:Klinik für Zahnerhaltung, Präventiv- und Kinderzahnmedizin Zahnmedizinische Kliniken der Universität Bern, Bern, Switzerland.
Título:[Diagnosis of dental erosions].
Título:Die Diagnose dentaler Erosionen..
Fonte:Swiss Dent J; 126(5):466-7, 2016.
ISSN:2296-6498
País de publicação:Switzerland
Idioma:ger
Tipo de publicação: JOURNAL ARTICLE


  3 / 2540 MEDLINE  
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PMID:27070901
Autor:Bizhang M; Riemer K; Arnold WH; Domin J; Zimmer S
Endereço:Department of Operative and Preventive Dentistry, Witten/Herdecke University, Witten, Germany.
Título:Influence of Bristle Stiffness of Manual Toothbrushes on Eroded and Sound Human Dentin--An In Vitro Study.
Fonte:PLoS One; 11(4):e0153250, 2016.
ISSN:1932-6203
País de publicação:United States
Idioma:eng
Resumo:AIM: The aim of this study was to determine the influence of manual toothbrushes with different bristle stiffness on the abrasivity on eroded and sound human dentin. MATERIALS AND METHODS: Dentin specimens were made from impacted third molars and attributed to three groups: erosion-abrasion (EA), abrasion (A) and erosion (E). The specimens from EA and E were treated with 1% citric acid (pH 2.3) for 1 min rinsed, and neutralized with artificial saliva for 15 min. This cycle was repeated five times. Thereafter, specimens from EA and A were treated with three toothbrushes types with different bristle stiffness (soft, medium, and hard) in a custom-made toothbrushing machine. The brushing was performed at a load of 3 N with a toothpaste slurry for 630 s. This procedure was repeated five times, in group EA after each erosion cycle. EA and A groups passed through five cycles with a total of 6300 strokes. The abrasivity was analyzed by contact-free profilometry. Kruskal-Wallis and Mann-Whitney U tests were performed for statistical analysis. RESULTS: With respect to bristle stiffness there was no statistically significant difference in dentin loss within the EA group. In group A, a statistically significantly higher dentin loss was found for the soft in comparison to the hard bristles. No statistically significant differences were measured between soft/medium and medium/hard toothbrushes. The amount of dentin loss from specimens in the EA group was significantly higher than in the A group. CONCLUSIONS: Within the limitations of this study, the dentin loss in the Abrasion group was higher with soft bristles than with hard ones. This result might have an influence on the toothbrush recommendations for patients with non-carious cervical lesions.
Tipo de publicação: EVALUATION STUDIES; JOURNAL ARTICLE
Nome de substância:0 (Saliva, Artificial); 0 (Toothpastes)


  4 / 2540 MEDLINE  
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PMID:27042713
Autor:Selent B
Título:Mechanical effects of different Swiss market-leading dentifrices on dentin.
Fonte:Swiss Dent J; 126(2):126, 2016.
ISSN:2296-6498
País de publicação:Switzerland
Idioma:eng
Tipo de publicação: COMMENT; LETTER
Nome de substância:0 (Dentifrices)


  5 / 2540 MEDLINE  
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PMID:27038781
Autor:Arnold WH; Gröger Ch; Bizhang M; Naumova EA
Endereço:Department of Biological and Material Sciences in Dentistry, School of Dentistry, Witten/Herdecke University, Witten, Germany. wolfgang.arnold@uni-wh.de.
Título:Dentin abrasivity of various desensitizing toothpastes.
Fonte:Head Face Med; 12:16, 2016 Apr 02.
ISSN:1746-160X
País de publicação:England
Idioma:eng
Resumo:BACKGROUND: The aim of this study was to compare the abrasivity of various commercially available toothpastes that claim to reduce dentin hypersensitivity. METHODS: Dentin discs were prepared from 70 human extracted molars. The discs were etched with lemon juice for 5 min, and one half of the discs were covered with aluminum tape. Following this, they were brushed with 6 different toothpastes, simulating a total brushing time of 6 months. As a negative control, discs were brushed with tap water only. The toothpastes contained pro-arginine and calcium carbonate, strontium acetate, stannous fluoride, zinc carbonate and hydroxyapatite, new silica, or tetrapotassium pyrophosphate and hydroxyapatite. After brushing, the height differences between the control halves and the brushed halves were determined with a profilometer and statistically compared using a Mann-Whitney U test for independent variables. RESULTS: A significant difference (p < 0.001) in height difference between the controls and the toothpaste-treated samples was found in all cases, except for the stannous fluoride-containing toothpaste (p = 0.583). The highest abrasion was found in the toothpaste containing zinc carbonate and hydroxyapatite, and the lowest was found in the toothpaste containing pro-arginine and calcium carbonate. CONCLUSIONS: Desensitizing toothpastes with different desensitizing ingredients have different levels of abrasivity, which may have a negative effect on their desensitizing abilities over a long period of time.
Tipo de publicação: COMPARATIVE STUDY; JOURNAL ARTICLE
Nome de substância:0 (Toothpastes)


  6 / 2540 MEDLINE  
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Buzalaf, Marilia Afonso Rabelo
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PMID:27008258
Autor:Hannas AR; Kato MT; Cardoso Cde A; Magalhães AC; Pereira JC; Tjäderhane L; Buzalaf MA
Endereço:Departamento de Ciências Biológicas, Faculdade de Odontologia de Bauru, Universidade de São Paulo, Bauru, SP, Brasil.
Título:Preventive effect of toothpastes with MMP inhibitors on human dentine erosion and abrasion in vitro.
Fonte:J Appl Oral Sci; 24(1):61-6, 2016 Jan-Feb.
ISSN:1678-7765
País de publicação:Brazil
Idioma:eng
Resumo:UNLABELLED: The use of gels and mouthrinses with MMP inhibitors (chlorhexidine, and green tea extract) was shown to prevent erosive wear. The aim of this study was to analyze the protective effect of toothpastes containing MMP inhibitors on dentine loss induced by erosion in vitro. MATERIAL AND METHODS: Five groups each containing 12 specimens of human root dentine were prepared. The specimens were subjected to 1 min erosion by immersion in a cola drink, 4 times a day, for 5 d. Each day, after the first and last erosive challenges, the specimens were brushed for 15 s with a slurry of dentifrice and water (1:3) containing placebo, 1,100 ppm fluoride, 0.61% green tea extract, 0.12% chlorhexidine or 0.004% chlorhexidine (commercial toothpaste). Between the acid challenges, the specimens were stored in artificial saliva with remineralizing potential until the next treatment. Dentine loss was determined using profilometry. Data were analyzed using one-way ANOVA after log transform (p<0.05). RESULTS: The mean wear values (µm) were as follows: placebo 1.83±0.53; 0.61% green tea extract 1.00±0.21; fluoride 1.27±0.43; 0.12% chlorhexidine 1.19±0.30; and 0.004% chlorhexidine 1.22±0.46. There was a significant difference in wear between placebo and all the treatment toothpastes, which did not differ from each other. CONCLUSION: The results suggest that toothpastes containing MMP inhibitors are as effective as those based on NaF in preventing dentine erosion and abrasion.
Tipo de publicação: JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Nome de substância:0 (Matrix Metalloproteinase Inhibitors); 0 (Saliva, Artificial); 0 (Toothpastes); R4KO0DY52L (Chlorhexidine)


  7 / 2540 MEDLINE  
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PMID:26848070
Autor:Hara AT; Livengood SV; Lippert F; Eckert GJ; Ungar PS
Endereço:Indiana University School of Dentistry, Indianapolis, IN, USA ahara@iu.edu.
Título:Dental Surface Texture Characterization Based on Erosive Tooth Wear Processes.
Fonte:J Dent Res; 95(5):537-42, 2016 May.
ISSN:1544-0591
País de publicação:United States
Idioma:eng
Resumo:The differential diagnosis of dental wear lesions affects their clinical management. We hypothesized that surface texture parameters can differentiate simulated erosion, abrasion, and erosion-abrasion lesions on human enamel and dentin. This in vitro study comprised 2 parts (both factorial 4 × 2), with 4 lesion types (erosion, abrasion, erosion-abrasion, and sound [no lesion; control]) and 2 substrates (enamel and dentin). Flattened/polished dental specimens were used in part 1, whereas natural dental surfaces were used in part 2. Testing surfaces were evaluated in blind conditions, using average surface roughness (Sa) and the following scale-sensitive fractal analysis parameters: area-scale fractal complexity (Asfc), exact proportion length-scale anisotropy of relief (eplsar), scale of maximum complexity (Smc), and textural fill volume (Tfv). Two-way analyses of variance, followed by Fisher's protected least significant difference tests (α = 0.05), were used to evaluate the effects of lesion and substrate. Classification trees were constructed to verify the strength of potential associations of the tested parameters. In part 1,Asfc, Sa, and Tfv were able to differentiate erosion and erosion-abrasion lesions from the sound (no lesion) control in both substrates; only Asfc differentiated erosion and erosion-abrasion enamel lesions (allP< 0.05). The best association of parameters correctly classified up to 84% and 94% of the lesions on enamel and dentin, respectively. In part 2, only Asfc differentiated erosion and erosion-abrasion lesions from the sound (no lesion) control in both substrates, whereas eplsar was able to differentiate erosion from erosion-abrasion (allP< 0.05). The association of parameters correctly classified up to 81% and 91% of the lesions in enamel and dentin, respectively.Asfc, Sa, and Tfv were able to differentiate erosion and erosion-abrasion lesions, despite their complicated surface textures. The association of parameters improved the differentiation of lesions for both enamel and dentin in polished or natural surfaces.
Tipo de publicação: COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Nome de substância:0 (Cariostatic Agents); 0 (Toothpastes); 2968PHW8QP (Citric Acid); Q80VPU408O (Fluorides)


  8 / 2540 MEDLINE  
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PMID:26333037
Autor:Wetselaar P; Lobbezoo F
Endereço:Department of Oral Kinesiology, Academic Centre for Dentistry Amsterdam (ACTA), MOVE Research Institute Amsterdam, University of Amsterdam and VU University Amsterdam, Amsterdam, The Netherlands.
Título:The tooth wear evaluation system: a modular clinical guideline for the diagnosis and management planning of worn dentitions.
Fonte:J Oral Rehabil; 43(1):69-80, 2016 Jan.
ISSN:1365-2842
País de publicação:England
Idioma:eng
Resumo:Tooth wear is a multifactorial condition, leading to the loss of dental hard tissues, viz. enamel and dentine. Tooth wear can be divided into the subtypes mechanical wear (attrition and abrasion) and chemical wear (erosion). Because of its multifactorial aetiology, tooth wear can manifest itself in many different representations, and therefore, it can be difficult to diagnose and manage the condition. A systematic approach is a sine qua non. In the below-described tooth wear evaluation system (TWES), all necessary tools for a clinical guideline are present in different modules. This allows the dental clinician, in a general practitioner setting as well as in a referral practice setting, to perform a state-of-the-art diagnostic process. To avoid the risk of a too cumbersome usage, the dental clinician can select only those modules that are appropriate for a given setting. The modules match with each other, which is indispensable and essential when different modules of the TWES are compared. With the TWES, it is possible to recognise the problem (qualifying), to grade its severity (quantifying), to diagnose the likely causes and to monitor (the progress of) the condition. In addition, a proposal for the classification of tooth wear is made. Further, it is possible to determine when to start a treatment, to make the decision which kind of treatment to apply and to estimate the level of difficulty of a restorative treatment.
Tipo de publicação: JOURNAL ARTICLE; REVIEW


  9 / 2540 MEDLINE  
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PMID:26794053
Autor:Tirone F; Salzano S; Borga FC; Guarnieri N; Rolando E
Título:Treatment of a case of serious occlusal instability associated with TMDs through a modern mini-invasive approach.
Fonte:Int J Esthet Dent; 10(4):576-86, 2015.
ISSN:2198-591X
País de publicação:Germany
Idioma:eng
Resumo:BACKGROUND: The latest trends in restorative dentistry are guided both by esthetic and mini-invasive procedures. New ceramic materials, such as lithium disilicate, allow the clinician to obtain invisible restorations with a minimum preparation thickness. SUMMARY: A young female patient presented at our practice with left temporomandibular closed locking and uncomfortable occlusal instability. After manual reduction, medical therapy, and reversible treatment with a stabilization splint, a mini-invasive lithium disilicate occlusal inferior posterior rehabilitation was conceived and performed. The esthetic integration of the onlay restorations was excellent, no fractures had occurred by the time of the 1-year follow-up, and the patient perceived the dental occlusion as comfortable. CONCLUSION: We strongly believe that a careful approach to esthetics is mandatory nowadays, including in the case of posterior teeth. New ceramic materials and the latest adhesive techniques make it possible to resort to mini-invasive and esthetic approaches, even in cases of restorations that are difficult in terms of functionality.
Tipo de publicação: CASE REPORTS; JOURNAL ARTICLE
Nome de substância:0 (lithia disilicate); 12001-21-7 (Dental Porcelain)


  10 / 2540 MEDLINE  
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PMID:26775295
Autor:Schneiderman E; Colón E; White DJ; St John S
Título:A Profilometry-Based Dentifrice Abrasion Method for V8 Brushing Machines Part II: Comparison of RDA-PE and Radiotracer RDA Measures.
Fonte:J Clin Dent; 26(3):61-5, 2015.
ISSN:0895-8831
País de publicação:United States
Idioma:eng
Resumo:OBJECTIVE: The purpose of this study was to compare the abrasivity of commercial dentifrices by two techniques: the conventional gold standard radiotracer-based Radioactive Dentin Abrasivity (RDA) method; and a newly validated technique based on V8 brushing that included a profilometry-based evaluation of dentin wear. This profilometry-based method is referred to as RDA-Profilometry Equivalent, or RDA-PE. METHODS: A total of 36 dentifrices were sourced from four global dentifrice markets (Asia Pacific [including China], Europe, Latin America, and North America) and tested blindly using both the standard radiotracer (RDA) method and the new profilometry method (RDA-PE), taking care to follow specific details related to specimen preparation and treatment. RESULTS: Commercial dentifrices tested exhibited a wide range of abrasivity, with virtually all falling well under the industry accepted upper limit of 250; that is, 2.5 times the level of abrasion measured using an ISO 11609 abrasivity reference calcium pyrophosphate as the reference control. RDA and RDA-PE comparisons were linear across the entire range of abrasivity (r2 = 0.7102) and both measures exhibited similar reproducibility with replicate assessments. RDA-PE assessments were not just linearly correlated, but were also proportional to conventional RDA measures. CONCLUSION: The linearity and proportionality of the results of the current study support that both methods (RDA or RDA-PE) provide similar results and justify a rationale for making the upper abrasivity limit of 250 apply to both RDA and RDA-PE.
Tipo de publicação: COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Nome de substância:0 (Dentifrices); 0 (Radioactive Tracers); X69NU20D19 (Calcium Pyrophosphate)



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