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Pesquisa : C07.793.818.124 [Categoria DeCS]
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  1 / 2546 MEDLINE  
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PMID:28380015
Autor:Gyurkovics M; Baumann T; Carvalho TS; Assunção CM; Lussi A
Endereço:Department of Preventive, Restorative and Pediatric Dentistry, University of Bern, Bern, Switzerland.
Título:In vitro evaluation of modified surface microhardness measurement, focus variation 3D microscopy and contact stylus profilometry to assess enamel surface loss after erosive-abrasive challenges.
Fonte:PLoS One; 12(4):e0175027, 2017.
ISSN:1932-6203
País de publicação:United States
Idioma:eng
Resumo:The aim of the study was to compare surface loss values after erosion-abrasion cycles obtained with modified surface microhardness measurement (mSMH), focus variation 3D microscopy (FVM) and contact stylus profilometry (CSP). We cut human molars into buccal and lingual halves, embedded them in resin and ground 200 µm of enamel away. The resulting surfaces were polished. To maintain a reference area, we applied Block-Out resin to partly cover the enamel surface. The samples were incubated in artificial saliva (37°C; 1 h), then rinsed in deionized water (10 s) and dried with oil-free air (5 s). We immersed the specimens individually in 30 mL citric acid (1%, pH 3.6) for 2 min (25°C, 70 rpm dynamic conditions) before brushing them (50 strokes, 200 g) in an automatic brushing machine with toothpaste-slurry. We calculated the surface loss as per mSMH, by re-measuring the length of the same six indentations made before the abrasive challenge. The experiment consisted of five experimental groups that received between 2 and 10 erosion-abrasion cycles. Each group contained 15 specimens and samples in groups 1, 2, 3, 4 and 5 underwent a total of 2, 4, 6, 8 and 10 cycles, respectively. The resin was removed from the reference area in one piece under 10× magnification and the FVM and CSP were performed. Agreement between the methods was calculated with the intraclass correlation coefficient (ICC) and depicted in Bland-Altman plots. All methods presented a linear pattern of surface loss measurements throughout the experiment, leading overall to a strong, statistically significant correlation between the methods (ICC = 0.85; p<0.001). So, despite the different surface loss values, all methods presented consistent results for surface loss measurement.
Tipo de publicação: JOURNAL ARTICLE


  2 / 2546 MEDLINE  
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PMID:28222156
Autor:Bizhang M; Schmidt I; Chun YP; Arnold WH; Zimmer S
Endereço:Faculty of Health, School of Dentistry, Department of Operative and Preventive Dentistry, Witten/Herdecke University, Witten, Germany.
Título:Toothbrush abrasivity in a long-term simulation on human dentin depends on brushing mode and bristle arrangement.
Fonte:PLoS One; 12(2):e0172060, 2017.
ISSN:1932-6203
País de publicação:United States
Idioma:eng
Resumo:OBJECTIVE: The aim of this study was to evaluate the susceptibility of dentin to brushing abrasion using four different toothbrushes (rotating-oscillating, sonic and two types of manual toothbrushes) with the same brushing forces. METHODS: Dentin samples (n = 72) were selected from 72 impacted third molars. Half of the surface of dentin samples was covered with an adhesive tape, creating a protected and a freely exposed area in the same specimen. Brushing was performed with either a: sonic (Sonicare PowerUp, Philips GmbH, Hamburg, Germany), b: oscillating-rotating (Oral B Vitality Precisions Clean, Procter & Gamble, Schwalbach am Taunus, Germany) or two different manual toothbrushes c: flat trim brush head toothbrush (Dr. Best: Original, Glaxo-Smith-Kline, Bühl, Germany) and d: rippled-shaped brush head toothbrush (Blend-a-Dent, Complete V-Interdental, Blend-a-med, Schwalbach, Germany) in a custom made automatic brushing machine. The brushing force was set to 2 N and a whitening toothpaste (RDA = 150) was used. The simulation period was performed over a calculated period to mimic a brushing behavior of two times a day brushing for eight years and six months. Dentin loss was quantitatively determined by profilometry and statistically analyzed by Wilcoxon and Mann-Whitney-U Test (p < 0.05). RESULTS: The mean (standard deviation) surface loss was 21.03 (±1.26) µm for the sonic toothbrush, 15.71 (±0.85) µm for the oscillating-rotating toothbrush, 6.13 (±1.24) µm for the manual toothbrush with flat trim brush head and 2.50 (±0.43) µm for the manual toothbrush with rippled-shaped brush head. Differences between all groups were statistically significant at p<0.05. CONCLUSION: Using the same brushing force and a highly abrasive toothpaste, manual toothbrushes are significantly less abrasive compared to power toothbrushes for an 8.5-year simulation.
Tipo de publicação: JOURNAL ARTICLE


  3 / 2546 MEDLINE  
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PMID:28617400
Autor:Iordanishvili AK; Pikhur OL; Cherni DA
Endereço:S.M. Kirov Military Medical Academy, St.-Petersburg, Russia.
Título:[Teeth wedge-shaped defects in adults of different age groups: remark to prevention and treatment].
Título:Klinovidnye defekty zubov u vzroslykh liudei raznykh vozrastnykh grupp: remarki k profilaktike i lecheniiu..
Fonte:Stomatologiia (Mosk); 96(3):14-17, 2017.
ISSN:0039-1735
País de publicação:Russia (Federation)
Idioma:rus
Resumo:The aim of the study was to assess the treatment of teeth wedge defects in different age groups. Records of 383 patients (125 males and 258 females aged 22-85 years) treated in outpatient dental facilities with different ownership forms. It is shown that the medical care of patients with wedge-shaped teeth defects routinely consists of remineralization therapy and restoration of anatomical teeth shape regardless of the form of ownership. The extensiveness of dental rehabilitation as well as the use of more modern technologies are typical for private clinics and 96-100% of patients finished their treatment there. In the state and departmental institutions complete rehabilitation of wedge-shaped defects was provided in 45.5-58.0% and 54.3-83.9, respectively. The paper also highlights the drawbacks of primary medical documentation identified in medical institutions of all forms of ownership.
Tipo de publicação: JOURNAL ARTICLE


  4 / 2546 MEDLINE  
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PMID:28376961
Autor:Milosevic A
Título:Abrasion: A Common Dental Problem Revisited.
Fonte:Prim Dent J; 6(1):32-36, 2017 Feb 28.
ISSN:2050-1684
País de publicação:England
Idioma:eng
Resumo:Dental abrasion is most commonly seen at the cervical necks of teeth, but can occur in any area, even inter-dentally from vigorous and incorrect use of dental floss. Acid erosion has been implicated in the initiation and progress of the cervical lesion, while tooth-brush abrasion has long been held as the prime cause of cervical abrasion. Identification of the risk factors is clearly important in order to modify any habits and provide appropriate advice.
Tipo de publicação: JOURNAL ARTICLE; REVIEW


  5 / 2546 MEDLINE  
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PMID:27351730
Autor:Vieira GH; Nogueira MB; Gaio EJ; Rosing CK; Santiago SL; Rego RO
Título:Effect of Whitening Toothpastes on Dentin Abrasion: An In Vitro Study.
Fonte:Oral Health Prev Dent; 14(6):547-553, 2016.
ISSN:1602-1622
País de publicação:England
Idioma:eng
Resumo:PURPOSE: To compare the effect of toothbrushing abrasion with hydrated silica-based whitening and regular toothpastes on root dentin using contact profilometry. MATERIALS AND METHODS: Ninety dentin specimens (4 x 4 x 2 mm) were randomly divided into five experimental groups (n = 18) according to the toothpaste: three whitening (W1, W2 and W3) and two regular toothpastes (R1 and R2) produced by two different manufacturers. Using a brushing machine, each specimen was brushed with a constant load of 300 g for 2500 cycles (4.5 cycles/s). The toothpastes were diluted at a ratio of 1:3 w/w (dentifrice:distilled water). The brush diamond tip of the profilometer moved at a constant speed of 0.05 mm/s with a force of 0.7 mN. RESULTS: The average value of brushing abrasion in µm (mean ± SD) was obtained from five consecutive measurements of each specimen: W1 = 8.86 ± 1.58, W2 = 7.59 ± 1.04, W3 = 8.27 ± 2.39, R1 = 2.89 ± 1.05 and R2= 2.94 ± 1.29. There was a significant difference between groups (ANOVA, p<0.0001). Post-hoc Tukey's test for multiple comparisons showed differences between all the whitening and regular toothpastes, but not among the whitening nor among the regular toothpastes. CONCLUSION: The whitening toothpastes tested can cause more dentin abrasion than the regular ones.
Tipo de publicação: JOURNAL ARTICLE
Nome de substância:0 (Tooth Bleaching Agents); 0 (Toothpastes)


  6 / 2546 MEDLINE  
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Texto completo SciELO Brasil
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)


  7 / 2546 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


  8 / 2546 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)


  9 / 2546 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)


  10 / 2546 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)



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