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1.
J Oral Sci ; 63(2): 191-194, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33790090

RESUMO

PURPOSE: To investigate the effect of slurry abrasive levels and acidic challenges on the development of non-carious cervical lesions. METHODS: Ninety-six extracted upper premolars were affixed in pairs to acrylic blocks and had their root surfaces covered by acrylic resin except for 2 mm from the cemento-enamel junction. The specimens were distributed into six groups (n = 8 pairs) based on two experimental factors: (1) slurry abrasivity level [low/medium/high] and (2) citric acid challenge [yes/no]. Specimens were brushed for 5,000, 15,000, 35,000, and 65,000 strokes. Volume loss (VL) was determined based on optical profilometry scans of specimens impressions at the baseline and at subsequent brushing levels. Data were analyzed using repeated measures analysis of variance and Bonferroni pairwise comparison (α = 0.05). RESULTS: Higher VL values were associated with high-abrasivity slurries relative to low- and medium-abrasivity slurries (P < 0.001). Increasing the slurry abrasivity level increased the VL regardless of the acidic challenge, which did not have a significant effect (P = 0.184). After 65,000 strokes, significant VL was recorded in all groups relative to preceding brushing levels (P < 0.001). CONCLUSION: Higher values of time-dependent surface loss were associated with increased dentifrice slurry abrasivity, regardless of the citric acid challenge.


Assuntos
Dentifrícios , Abrasão Dentária , Erosão Dentária , Humanos , Abrasão Dentária/etiologia , Colo do Dente , Erosão Dentária/etiologia , Escovação Dentária , Cremes Dentais
2.
J Dent ; 105: 103577, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33388388

RESUMO

OBJECTIVE: To investigate the effect of different types of manual toothbrushes and brushing loads on the progression of erosive tooth wear (ETW) on enamel. METHODS: Bovine enamel specimens (n = 10) were submitted to a 5-day erosive-abrasive cycling model (0.3 % citric acid for 5 min, artificial saliva for 60 min, 4x/day). Toothbrushing was carried out 2x/day for 15 s, according to the toothbrushes tested (ultra-soft (a): Curaprox 5460; ultra-soft (b): Sensodyne Repair & Protect; soft (a): Colgate Slim Soft; soft (b): Oral-B Indicator Plus; medium: Johnson's Professional; hard: Tek) and brushing loads (1.5 N, 3 N). Surface loss (SL, in µm) was assessed by optical profilometry on conclusion of the cycling. Some of the toothbrush characteristics were evaluated. Data were statistically analyzed (α = 0.05). RESULTS: For the 1.5 N load, the hard brush showed the highest SL value, with statistical significance. The other toothbrushes did not differ significantly, except that ultra-soft (a) caused significantly higher SL than ultra-soft (b). For the 3 N load, hard and soft (a) exhibited the highest SL. Soft (b) and medium had the lowest SL value, with statistical significance. Only soft (a) and ultra-soft (b) showed significant difference between loads, with lower SL for the load of 1.5 N. None of the toothbrush characteristics were significantly correlated with SL. CONCLUSIONS: Although different degrees of enamel surface loss were observed with use of the different toothbrushes, no association was found between the toothbrush characteristics and SL. Depending on the toothbrush, the force of brushing was capable of modulating the ETW of enamel. Based on the brushing loads usually applied by healthy individuals, hard brushes are not recommended for use by patients with ETW. CLINICAL SIGNIFICANCE: The use of hard bristle brushes is not recommended for use by individuals who exert healthy forces when brushing their teeth. The toothbrush characteristics are of secondary importance in terms of causing enamel loss in ETW.


Assuntos
Abrasão Dentária , Atrito Dentário , Desgaste dos Dentes , Animais , Bovinos , Esmalte Dentário , Humanos , Abrasão Dentária/etiologia , Abrasão Dentária/prevenção & controle , Desgaste dos Dentes/prevenção & controle , Escovação Dentária
3.
Proc Natl Acad Sci U S A ; 117(36): 22264-22273, 2020 09 08.
Artigo em Inglês | MEDLINE | ID: mdl-32839331

RESUMO

Food processing wears down teeth, thus affecting tooth functionality and evolutionary success. Other than intrinsic silica phytoliths, extrinsic mineral dust/grit adhering to plants causes tooth wear in mammalian herbivores. Dental microwear texture analysis (DMTA) is widely applied to infer diet from microscopic dental wear traces. The relationship between external abrasives and dental microwear texture (DMT) formation remains elusive. Feeding experiments with sheep have shown negligible effects of dust-laden grass and browse, suggesting that intrinsic properties of plants are more important. Here, we explore the effect of clay- to sand-sized mineral abrasives (quartz, volcanic ash, loess, kaolin) on DMT in a controlled feeding experiment with guinea pigs. By adding 1, 4, 5, or 8% mineral abrasives to a pelleted base diet, we test for the effect of particle size, shape, and amount on DMT. Wear by fine-grained quartz (>5/<50 µm), loess, and kaolin is not significantly different from the abrasive-free control diet. Fine silt-sized quartz (∼5 µm) results in higher surface anisotropy and lower roughness (polishing effect). Coarse-grained volcanic ash leads to significantly higher complexity, while fine sands (130 to 166 µm) result in significantly higher roughness. Complexity and roughness values exceed those from feeding experiments with guinea pigs who received plants with different phytolith content. Our results highlight that large (>95-µm) external silicate abrasives lead to distinct microscopic wear with higher roughness and complexity than caused by mineral abrasive-free herbivorous diets. Hence, high loads of mineral dust and grit in natural diets might be identified by DMTA, also in the fossil record.


Assuntos
Ração Animal , Cobaias , Plantas , Abrasão Dentária/veterinária , Desgaste dos Dentes/veterinária , Animais , Dieta/veterinária , Herbivoria , Tamanho da Partícula , Abrasão Dentária/etiologia
5.
Rev. cuba. estomatol ; 56(4): e1998, oct.-dez. 2019.
Artigo em Português | LILACS | ID: biblio-1093255

RESUMO

RESUMO Introdução: As lesões cervicais não cariosas são lesões dentárias, que apresentam etiologia multifatorial, sem o envolvimento de bactérias. Objetivo: Descrever as características clínicas, etiologia e tratamento das lesões cervicais não-cariosas. Métodos: Realizou-se uma revisão bibliográfica de estudos publicados nos últimos 5 anos (2014-2018) por meio da busca nas bases de dados: PubMED/Medline, Lilacs, Science Direct, SciELO (Scientific Eletronic Library) e Google Acadêmico. Para a pesquisa foram utilizados os seguintes descritores: "lesões cervicais não cariosas (non-carious cervical lesions)", "abrasão dentária (dental abrasion)", "erosão dentária (dental erosion)", "abfração dentária (dental abfraction)" e "atrição dentária (dental atrittion). Após criteriosa filtragem, foram selecionados 26 artigos e 2 livros para inclusão no estudo. Análise e integração das informações: As lesões cervicais não cariosas comumente classificadas em: abrasão, abfração, erosão e atrição. Essas lesões podem apresentar diversas formas, apesar de serem incluídas em uma classe genérica de denominação. São lesões que causam a perda gradativa dos tecidos mineralizados dentários, podendo trazer inúmeras consequências ao dente acometido. Conclusão: Para um correto diagnóstico e decisão de tratamento, essas lesões devem ser vistas sob seu aspecto etiológico multifatorial. Diversas possibilidades terapêuticas podem ser utilizadas no tratamento dessas lesões sendo necessário que o clínico conheça os principais fatores etiológicos e características clínicas que as diferenciem(AU)


RESUMEN Introducción: Las lesiones cervicales no cariosas son lesiones dentales, que presentan etiología multifactorial, sin la participación de bacterias. Objetivo: Describir las características clínicas, etiología y tratamiento de las lesiones cervicales no cariosas. Métodos: Se realizó una revisión bibliográfica de estudios publicados en los últimos 5 años (2014-2018) a través de la búsqueda en las bases de datos: PubMED / Medline, Lilacs, Science Direct, SciELO (Scientific Eletronic Library) y Google Académico. Para la investigación se utilizaron los siguientes descriptores: "lesiones cervicales no cariosas", "abrasión dental", "erosión dental", "abfracción dental" y " " atrición dental. Después de un cuidadoso filtrado, se seleccionaron 26 artículos y 2 libros para su inclusión en el estudio. Análisis e integración de las informaciones: Las lesiones cervicales no cariosas comúnmente clasificadas en: abrasión, abfración, erosión y atrición. Estas lesiones pueden presentar diversas formas, aunque se incluyen en una clase genérica de denominación. Son lesiones que causan la pérdida gradual de los tejidos mineralizados dentales, pudiendo traer innumerables consecuencias al diente acometido. Conclusiones: Para un correcto diagnóstico y decisión de tratamiento, estas lesiones deben ser vistas bajo su aspecto etiológico multifactorial. Diversas posibilidades terapéuticas pueden ser utilizadas en el tratamiento de esas lesiones, por lo que resulta necesario que el clínico conozca los principales factores etiológicos y características clínicas que las diferencien(AU)


ABSTRACT Introduction: Non-carious cervical lesions are dental lesions of a multifactorial etiology, without the involvement of bacteria. Objective: Describe the clinical characteristics, etiology and treatment of non-carious cervical lesions Methods: A bibliographic review was conducted of studies published in the last five years (2014-2018) by searching the databases PubMED / Medline, Lilacs, Science Direct, SciELO (Scientific Electronic Library) and Google Scholar. The following descriptors were used: "non-carious cervical lesions", "dental abrasion", "dental erosion", "dental abfraction" and "dental attrition. After careful filtering, 26 articles and two books were selected for inclusion in the study. Data analysis and integration: Non-carious cervical lesions are commonly classified as abrasion, abfraction, erosion and attrition. These lesions may present various forms, but they are all grouped in a single generic class. They are lesions that cause the gradual loss of mineralized dental tissue, which may bring countless consequences to the affected tooth. Conclusions: For a correct diagnosis and treatment decision, these lesions must be seen under their multifactorial etiological aspect. Various therapeutic possibilities may be used in the treatment of these lesions, and it is necessary for the clinician to know the main etiological factors and clinical characteristics that differentiate them(AU)


Assuntos
Humanos , Abrasão Dentária/etiologia , Erosão Dentária/terapia , Literatura de Revisão como Assunto , Atrito Dentário/etiologia , Bases de Dados Bibliográficas , Técnicas e Procedimentos Diagnósticos/efeitos adversos
6.
BMC Oral Health ; 19(1): 167, 2019 07 26.
Artigo em Inglês | MEDLINE | ID: mdl-31349831

RESUMO

BACKGROUND: There is a need for analytical techniques for measuring Erosive Tooth Wear (ETW) on natural surfaces in clinical studies. The purpose was to investigate the use of two instruments aimed to assess initial to more advanced stages of ETW. METHODS: Human premolar enamel samples (2x3mm) (n = 24), were polished flat and mounted in resin cylinders (4 cylinders, 6 samples in each). Part 1: Baseline analyses by White Light Interferometer (WLI), Surface Reflection Intensity (SRI: TableTop and OptiPen) and Surface Hardness (SH). Erosion (1% citric acid (pH 3.6) for 1, 2, 4, 6, 8, 10 min. SRI and SH analyses after every erosion episode and by WLI after 10 min. New indentations were made and enamel loss; was measured by change in indentation depths from toothbrush abrasion (200 g, 60 strokes, 30 s). Another series of 2 × 5 min erosion (totally15 min and 20 min) was analysed with SH and SRI after each erosion, and by WLI (on samples and impressions of samples) after 20 min. Part 2 investigated WLI performance in the interface where initial erosion increases in severity and substance loss occurs. The samples were repolished. Baseline analyses by WLI, SRI (TableTop and OptiPen) and SH. Four cylinders were etched for 1, 2, 4, 8 min respectively and analysed by SRI, SH on samples, and WLI on samples and impressions). RESULTS: Part1: SRI decreased from baseline to ~ 6 min etch and increased slightly after abrasion, the two devices correlated well (ICC 0.98 p < 0.001, Spearmans rs 0.91 p < 0.001). SH decreased nearly linearly to 10 min etch, but increased distinctly after abrasion. Mean enamel loss from abrasion alone was 0.2 µm (change in indentation depths). After 10 min etch, it was 0.27 µm (WLI) and after 20 min etch, it was 2.2 µm measured on samples vs 2.4 µm on impressions of samples (7% higher). Part 2: From baseline to 8 min etch; SRI and SH decreased whereas WLI presented increasing etch depths. CONCLUSIONS: With some adjustments, the use of SRI and WLI in combination seems to be a promising strategy for monitoring ETW in clinical studies.


Assuntos
Abrasão Dentária/etiologia , Atrito Dentário , Erosão Dentária/etiologia , Desgaste dos Dentes , Escovação Dentária/efeitos adversos , Ácido Cítrico/química , Esmalte Dentário/patologia , Dureza , Humanos , Abrasão Dentária/patologia , Erosão Dentária/patologia , Escovação Dentária/instrumentação
7.
Niger J Clin Pract ; 21(12): 1607-1614, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-30560825

RESUMO

Aim: The aim of this case-control study was to compare the associated risk factors between adults with tooth wear (TW) and age- and sex-matched controls without TW. Methods: Fifty participants with TW and 50 age- and sex-matched controls participated in this study. A questionnaire was prepared to assess oral healthcare and consumption of erosive food and drinks. All participants completed the diet analysis forms. Saliva characteristics were evaluated with GC Saliva-Check BUFFER test. Examiners measured the TW of case patients, using the TW index. Data were statistically analyzed using Chi-square and Mann-Whitney U-tests (P < 0.05). Results: Individuals in the case group brush their teeth more often (P < 0.05). The difference in erosive food consumption between the case and control groups was significant (P < 0.05). There was no erosive effect of acidic food when consumed as a main meal or a snack (P > 0.05). Although there was no difference between stimulated saliva flow rate and buffering capacity between groups, the difference between the resting saliva flow rates and pH values was significant (P < 0.05). Although some wear was seen on buccal/labial surfaces of teeth, cervical and occlusal/incisal surfaces were scored higher. No TW was observed on palatal/lingual surfaces. The cervical surfaces of mandibular premolars and incisal surfaces of anterior teeth were most affected. Conclusion: Of the factors investigated, TW in the case group was correlated with consumption of acidic foods, lower salivary flow rate, and pH.


Assuntos
Bebidas Gaseificadas/efeitos adversos , Dieta , Higiene Bucal , Saliva/metabolismo , Abrasão Dentária/etiologia , Erosão Dentária/etiologia , Desgaste dos Dentes/complicações , Adolescente , Adulto , Idoso , Estudos de Casos e Controles , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Taxa Secretória , Estatísticas não Paramétricas , Inquéritos e Questionários , Abrasão Dentária/epidemiologia , Erosão Dentária/epidemiologia , Desgaste dos Dentes/epidemiologia , Adulto Jovem
8.
Swiss Dent J ; 128(1): 14-19, 2018 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-29533050

RESUMO

This study was to analyse the abrasive wear of differently composed diamond dentifrices loaded with 2.4 µm diamond particles on dentine and enamel surfaces in vitro. Bovine specimens were brushed with a diamond-loaded dentifrice (DD2; 2 g particles/kg), a diamond-loaded dentifrice (1.5 g/kg) containing 20% hydrated silica as extra abrasive (DD1.5+S), or a diamond-loaded dentifrice (3 g/kg) containing 20% hydrated silica abrasive (DD3+S). Values were compared to those obtained with Colgate Total (CT) and Elmex Sensitive plus (ES). Brushing was performed using a cross brushing machine (F = 2.5 N; 120 brushing strokes/min). Abrasive wear [µm] of specimens (n = 12) was measured profilometrically and adjusted to 10,000 brushing strokes (10 kBS). Data were compared between groups using one-way ANOVA and post-hoc pairwise tests with Tukey correction, alpha = 0.05. Diamond dentifrices and ES showed no difference on dentine specimens: DD2 7.7 ± 2.6 µm/10 kBS; DD1.5+S 10.1 ± 2.3 µm/ 10 kBS; DD3+S 10.1 ± 2.6 µm/10 kBS; ES 7.4 ± 1.1 µm/10 kBS, while CT­brushed specimens exhibited significantly higher dentinal abrasion compared to all other groups: CT 31.0 ± 7.7 µm/ 10 kBS. Diamond loading significantly influenced enamel wear (mean ± SD µm/10 kBS): DD2 1.8 ± 0.5 µm/10 kBS. Conversely, addition of the silica abrasive reduced these values: DD1.5+S 1.1 ± 0.3 µm/10 kBS; DD3+S 1.6 ± 0.3 µm/10 kBS. CT and ES revealed similarly low values: CT 0.3 ± 0.1 µm/10 kBS; ES 0.2 ± 0.1 µm/10 kBS. These data suggest that abrasion caused by diamond particles in experimental toothpastes is differentially affected by diamond particle load, additional abrasives, and the type of hard tissue.


Assuntos
Esmalte Dentário , Dentifrícios/efeitos adversos , Dentina , Diamante/efeitos adversos , Abrasão Dentária/etiologia , Desgaste dos Dentes/etiologia , Animais , Bovinos , Esmalte Dentário/efeitos dos fármacos , Dentina/patologia , Técnicas In Vitro , Microscopia Eletrônica de Varredura , Desgaste dos Dentes/patologia
9.
Arch Oral Biol ; 89: 65-69, 2018 05.
Artigo em Inglês | MEDLINE | ID: mdl-29475189

RESUMO

OBJECTIVE: This study aims to evaluate how casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) associated with Nd:YAG or Diode laser affects dentin exposed to hydrochloric acid (HCl) with or without tooth brushing. DESIGN: One hundred and sixty human root dentin blocks were selected after they were initially eroded with liquid HCl (pH 1.2) 3x for one day. The blocks were divided into the following groups: G1- liquid HCl (HCl-l), G2- HCl-l + brushing, G3- gaseous HCl (HCl-g), and G4- HCl-g + brushing. Each group was randomly assigned to the following treatments (n = 10): A) Control (no treatment), B) CPP-ACP, C) CPP-ACP associated with Nd:YAG laser (λ = 1064 nm) (40 mJ, 10 Hz, 0.4 W, 15 s), and D) CPP-ACP associated with Diode laser (λ = 980 nm) (0.5 W, 200 µs, 15 s). The treatment with CPP-ACP (G2, G3 and G4) was applied on the dentine surface for 5 min. Erosion (6x/day/20 s) and erosion (6x/day/20 s) with abrasion (2x/10 s) were performed for five days. Dentin volume loss was determined by 3D confocal laser microscopy. Data were analyzed with two-way ANOVA and Tukey's tests. RESULTS: G1 - CPP-ACP (10.77 ±â€¯1.66) and CPP-ACP associated with Diode laser (9.98 ±â€¯0.89) showed lower volume loss in relation Control group (12.86 ±â€¯0.63) (p < 0.05). G2 - CPP-ACP associated with Diode laser (12.41 ±â€¯1.08) elicited lower volume loss as compared to the Control (14.42 ±â€¯1.24) (p < 0.05). As for G3 and G4, all treatments showed similar volume loss. CONCLUSION: CPP-ACP and CPP-ACP associated with Diode laser could control dental tissue loss in dentin eroded by liquid HCl. Moreover, CPP-ACP associated with Diode laser could effectively decrease dental tissue loss in dentin exposed to liquid HCl and brushing.


Assuntos
Caseínas/farmacologia , Dentina/efeitos dos fármacos , Gases , Ácido Clorídrico/efeitos adversos , Lasers de Estado Sólido/uso terapêutico , Abrasão Dentária/tratamento farmacológico , Erosão Dentária/tratamento farmacológico , Escovação Dentária/efeitos adversos , Dentina/diagnóstico por imagem , Dentina/patologia , Humanos , Concentração de Íons de Hidrogênio , Microscopia Confocal , Distribuição Aleatória , Propriedades de Superfície , Abrasão Dentária/etiologia , Abrasão Dentária/prevenção & controle , Erosão Dentária/etiologia , Erosão Dentária/patologia , Erosão Dentária/prevenção & controle , Raiz Dentária/diagnóstico por imagem , Raiz Dentária/efeitos dos fármacos , Raiz Dentária/patologia
10.
Int J Dent Hyg ; 16(2): e128-e132, 2018 May.
Artigo em Inglês | MEDLINE | ID: mdl-29457353

RESUMO

OBJECTIVE: To compare the brushing abrasion carried out by manual toothbrushes with different bristle types (hard and soft) on normal and demineralized human enamel. MATERIALS AND METHODS: Thirty enamel blocks (N = 30) were prepared and were randomly divided into three main groups: A, teeth kept in artificial saliva with no brushing (control, n = 2); B, teeth brushed with toothbrushes with hard bristles (n = 14); and C, teeth brushed with toothbrushes with soft bristles (n = 14). Seven teeth belonging to groups B and C were brushed normally, and the remaining seven were demineralized before brushing experiments with 6 wt.% citric acid (pH = 2.2) for 5 minutes. The brushing experiments were carried out twice a day for 2 mins for 7 days inside a toothbrush simulation machine. The changes in the surface of enamel (prebrushing and post-brushing) were evaluated using non-contact profilometry. The results were analysed statistically using Kruskal-Wallis test and the Wilcoxon signed rank test. RESULTS: For both normal and demineralized enamel, toothbrushes with soft bristles caused more abrasion. The results revealed significant differences (P = .055) in the surface roughness values between the four groups prebrushing. Within each group, the prebrushing and post-brushing surface roughness value differences were all statistically significant (P < .05). CONCLUSIONS: The results demonstrate that soft bristles caused more abrasion as compared with the hard bristles. These results could have an impact on the toothbrush recommendations for patients.


Assuntos
Esmalte Dentário , Abrasão Dentária/etiologia , Escovação Dentária/instrumentação , Desenho de Equipamento , Humanos , Técnicas In Vitro , Distribuição Aleatória , Saliva Artificial , Propriedades de Superfície
11.
Oper Dent ; 43(1): 38-50, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-28857711

RESUMO

The purpose of the present in vitro study was to compare the two-body wear resistance of a type 3 gold alloy (Aurocast8), two lithium disilicate glass ceramics (IPS e.max CAD and IPS e.max Press), a heat-pressed feldspathic porcelain (Cerabien ZR Press), an yttria-stabilized tetragonal zirconia polycrystal ceramic (Katana Zirconia ML), and three heat-cured composite resins (Ceram.X Universal, Enamel Plus Function, and Enamel Plus HRi) opposing antagonistic cusps made out of the same restorative materials. Ten 6-mm-thick samples and 10 cusp-shaped abraders were manufactured with each test material (n=10) according to standard laboratory procedures. All sample/antagonist pairs made out of the same material were subjected to a two-body wear test in a dual-axis chewing simulator for up to 120,000 loading cycles. The total vertical wear (mm) and the total volumetric loss (mm3) for each sample/antagonist pair were calculated. Data were statistically analyzed using one-way analysis of variance tests. The total vertical wear for the gold alloy was not significantly different compared to Ceram.X Universal, Enamel Plus Function, IPS e.max CAD, and Cerabien ZR Press. Significantly increased wear values were observed for Enamel Plus HRi and IPS e.max Press. The lowest values for total vertical wear and volumetric loss were recorded on the monolithic zirconia.


Assuntos
Resinas Compostas/uso terapêutico , Porcelana Dentária/uso terapêutico , Prótese Dentária , Ligas de Ouro/uso terapêutico , Abrasão Dentária/etiologia , Ítrio/uso terapêutico , Zircônio/uso terapêutico , Humanos , Técnicas In Vitro
12.
Rev. Ateneo Argent. Odontol ; 57(2): 33-38, nov. 2017. ilus
Artigo em Espanhol | LILACS | ID: biblio-973121

RESUMO

El objetivo de este trabajo consiste en describir las distintas lesiones cervicales no cariosas, la abrasión, la erosión y la abfracción. Se desarrollarán en detalle su etiología, localización y características clínicas. Se mencionarán los diferentes procedimientos a realizar para su prevención y los materiales a utilizar para su restauración.


This article describes the different types of non-cariouscervical lesions, for example abrasion, erosionand abfraction. We will discuss their etiology, location and clinical features in detail. We will describe the procedures to prevent them, aswell as the materials used for their restoration.


Assuntos
Humanos , Colo do Dente/lesões , Erosão Dentária/etiologia , Erosão Dentária/prevenção & controle , Erosão Dentária/terapia , Abrasão Dentária/etiologia , Abrasão Dentária/prevenção & controle , Abrasão Dentária/terapia , Desgaste dos Dentes , Aumento da Coroa Clínica/métodos , Atrito Dentário/etiologia , Atrito Dentário/prevenção & controle , Atrito Dentário/terapia , Fluoretos Tópicos/administração & dosagem , Remineralização Dentária/métodos , Odontologia Preventiva , Oclusão Dentária , Má Oclusão/prevenção & controle
13.
J Dent ; 67: 84-87, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29017845

RESUMO

OBJECTIVES: To assess the interplay between dietary acid intake, toothbrushing and erosive tooth wear as aetiological factors in self-reported DH MATERIALS AND METHODS: This is a secondary analysis on previously collected data from 600 participants with (n=300) and without (n=300) severe erosive tooth wear. Participants recruited from restorative clinics of King's College London Dental Institute (REC Ref 14/EM/1171) were questioned on their self-reported DH, frequency and timing of dietary acid intake, habits associated with consumption of dietary acids and tooth brushing habits. Erosive tooth wear was assessed using Basic Erosive Wear Examination (BEWE). Differences in diet and brushing habits between those with self-reported DH and those without were analysed using descriptives and logistic regression in SPSS vers. 24. RESULTS: Of those reporting with DH (n=272), a greater number spent ≥10min eating fruit per sitting, (n=46) and had a drinking habit such as sipping, swishing or holding drinks in the mouth (n=72) compared to those without DH (n=26 OR 2.72, 95%CI [1.32-5.61], p=0.007 and n=38 OR2.33, 95%CI [1.40-3.88], p=0.001, respectively). More DH participants used a soft toothbrush (n=36) compared to those without DH (n=18 OR 2.35, 95%CI [1.20-4.59], p=0.013). No association was observed with frequency of daily toothbrushing or dietary acid intake. CONCLUSION: Contact time between the tooth and the acid may be a more important risk factor for DH compared to frequency of dietary acid intake or frequency of toothbrushing. Other possible aetiological factors should be considered. CLINICALTRIALS. GOV NUMBER: NCT02449434 CLINICAL SIGNIFICANCE: Increased contact time with dietary acids and sipping swishing or holding drinks in the mouth prior to swallowing should be addressed as an aetiological factor in DH. Toothpaste abrasivity and toothbrush filament stiffness may play a greater role in DH compared to frequency of toothbrushing.


Assuntos
Ácidos/efeitos adversos , Sensibilidade da Dentina/etiologia , Dieta/efeitos adversos , Comportamento Alimentar , Desgaste dos Dentes/etiologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Bebidas/efeitos adversos , Bebidas/estatística & dados numéricos , Sensibilidade da Dentina/epidemiologia , Dieta/estatística & dados numéricos , Comportamento de Ingestão de Líquido , Ingestão de Alimentos , Feminino , Frutas/efeitos adversos , Sucos de Frutas e Vegetais/efeitos adversos , Humanos , Concentração de Íons de Hidrogênio , Modelos Logísticos , Londres , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Autorrelato , Inquéritos e Questionários , Fatores de Tempo , Abrasão Dentária/etiologia , Erosão Dentária/epidemiologia , Erosão Dentária/etiologia , Desgaste dos Dentes/epidemiologia , Escovação Dentária/efeitos adversos , Cremes Dentais , Adulto Jovem
14.
J Am Dent Assoc ; 148(11S): S27-S33, 2017 11.
Artigo em Inglês | MEDLINE | ID: mdl-29056187

RESUMO

BACKGROUND: Toothpastes can be formulated with different abrasive systems, depending on their intended clinical application. This formulation potentially affects their effectiveness and safety and, therefore, requires proper understanding. In this article, the authors focused on abrasive aspects of toothpastes containing sodium bicarbonate (baking soda), which have gained considerable attention because of their low abrasivity and good compatibility, while providing clinical effectiveness (further detailed in the other articles of this special issue). The authors first appraised the role of toothpaste abrasivity on tooth wear, exploring some underlying processes and the existing methods to determine toothpaste abrasivity. TYPES OF STUDIES REVIEWED: The authors reviewed the available data on the abrasivity of toothpastes containing baking soda and reported a summary of findings highlighting the clinical implications. CONCLUSIONS: On the basis of the collected evidence, baking soda has an intrinsic low-abrasive nature because of its comparatively lower hardness in relation to enamel and dentin. Baking soda toothpastes also may contain other ingredients, which can increase their stain removal effectiveness and, consequently, abrasivity. PRACTICAL IMPLICATIONS: Even those formulations have abrasivity well within the safety limit regulatory agencies have established and, therefore, can be considered safe.


Assuntos
Dentifrícios/uso terapêutico , Bicarbonato de Sódio/uso terapêutico , Abrasão Dentária/etiologia , Cremes Dentais/uso terapêutico , Esmalte Dentário/efeitos dos fármacos , Dentifrícios/efeitos adversos , Dentifrícios/farmacologia , Dentina/efeitos dos fármacos , Humanos , Bicarbonato de Sódio/efeitos adversos , Bicarbonato de Sódio/farmacologia , Cremes Dentais/efeitos adversos , Resultado do Tratamento
15.
Swiss Dent J ; 127(7-8): 634-639, 2017 07 24.
Artigo em Inglês | MEDLINE | ID: mdl-28911219

RESUMO

Eroded enamel is more susceptible to abrasive wear than sound enamel. New toothpastes utilizing diamond particles as abrasives have been developed. The present study investigated the abrasive wear of eroded enamel by three commercially available toothpastes (one containing diamond particles) and compared it to the respective wear of sound enamel caused by these toothpastes. Seventy-two bovine enamel samples were randomly allocated to six groups (S1­S3 and E1­E3; n=12). Samples were submitted to an abrasive (S1­S3) or erosion plus abrasion (E1­E3) cycling. Per cycle, all samples were brushed (abrasion; 20 brushing stokes) with the following toothpastes: S1/E1: Signal WHITE SYSTEM, S2/E2: elmex KARIESSCHUTZ and S3-E3: Candida WHITE DIAMOND (diamond particles). Groups E1­E3 were additionally eroded with HCl (pH 3.0) for 2 min before each brushing procedure. After 30, 60 and 90 cycles enamel wear was measured by surface profilometry. Within the same toothpaste and same number of cycles, enamel wear due to erosion plus abrasion was significantly higher than due to mere abrasion. After 30, 60 and 90 cycles, no significant difference in the wear in groups S1 and S2 was observed while the wear in group E1 was significantly (p<0.05, ANOVA, Scheffecyc) lower than that in group E2. After 90 cycles, wear in group S3 was about 5 times higher than that in group S2, while wear in group E3 was about 1.3 times higher than that in group E2. As compared to the other two investigated toothpastes, the dentifrice containing diamond particles caused slightly higher abrasive wear of eroded enamel and distinctly higher wear of sound enamel compared to the conventional toothpastes under investigation.


Assuntos
Dentifrícios/efeitos adversos , Diamante , Abrasão Dentária/etiologia , Erosão Dentária/complicações , Animais , Bovinos , História do Século XX
16.
US Army Med Dep J ; (2-17): 71-79, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28853123

RESUMO

STATEMENT OF PROBLEM: A novel esthetic porcelain characterization technique involves mixing an appropriate amount of ceramic colorants with clear, low-fusing porcelain (LFP), applying the mixture on the external surfaces, and firing the combined components onto the surface of restorations in a porcelain oven. This method may provide better esthetic qualities and toothbrush abrasion resistance compared to the conventional techniques of applying color-corrective porcelain colorants alone, or applying a clear glaze layer over the colorants. However, there is no scientific literature to support this claim. PURPOSE: This research evaluated toothbrush abrasion resistance of a novel porcelain esthetic characterization technique by subjecting specimens to various durations of simulated toothbrush abrasion. The results were compared to those obtained using the conventional characterization techniques of colorant application only or colorant followed by placement of a clear over-glaze. METHOD AND MATERIALS: Four experimental groups, all of which were a leucite reinforced ceramic of E TC1 (Vita A1) shade, were prepared and fired in a porcelain oven according to the manufacturer's instructions. Group S (stain only) was characterized by application of surface colorants to provide a definitive shade of Vita A3.5. Group GS (glaze over stain) was characterized by application of a layer of glaze over the existing colorant layer as used for Group S. Group SL (stain+LFP) was characterized by application of a mixture of colorants and clear low-fusing add-on porcelain to provide a definitive shade of Vita A3.5. Group C (Control) was used as a control without any surface characterization. The 4 groups were subjected to mechanical toothbrushing using a 1:1 water-to-toothpaste solution for a simulated duration of 32 years of clinical use. The amount of wear was measured at time intervals simulating every 4 years of toothbrushing. These parameters were evaluated longitudinally for all groups as well as compared at similar time points among groups. RESULTS: In this study, the novel external characterization technique (stain+LFP: Group SL) did not significantly enhance the wear resistance against toothbrush abrasion. Instead, the average wear of the applied extrinsic porcelain was 2 to 3 times more than Group S (stain only) and Group GS (glaze over stain). Application of a glaze layer over the colorants (Group GS) showed a significant improvement on wear resistance. Despite its superior physical properties, the leucite reinforced ceramic core (Group C) showed 2 to 4 times more wear when compared with other test groups. CONCLUSION: A conventional external esthetic characterization technique of applying a glaze layer over the colorants (Group GS) significantly enhanced the surface wear resistance to toothbrush abrasion when compared with other techniques involving application of colorants only (Group S) or mixture of colorant and LFP (Group SL). The underlying core ceramic had significantly less wear resistance compared with all externally characterized specimens. The novel esthetic characterization technique showed more wear and less color stability, and is thus not advocated as the "best" method for surface characterization. CLINICAL IMPLICATIONS: Application of a glaze layer provides a more wear-resistant surface from toothbrush abrasion when adjusting or extrinsically characterizing leucite reinforced ceramic restorations. Without the glaze layer, the restoration is subjected to a 2 to 4 times faster rate and amount of wear leading to possible shade mismatch.


Assuntos
Cerâmica/análise , Porcelana Dentária/análise , Abrasão Dentária/patologia , Escovação Dentária , Estética , Humanos , Medicina Militar/métodos , Abrasão Dentária/etiologia
17.
Int Dent J ; 67(6): 344-350, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28574173

RESUMO

OBJECTIVES: To investigate the loss of enamel and dentin surface caused by the interaction between abrasives in toothpaste and toothbrush filament stiffness. METHODS: The study followed a 2 (high-level or low-level abrasive; silica) × 3 (filament stiffness; soft, medium or hard) × 2 (cycling time; 3 or 5 days) factorial design. Polished bovine enamel and dentin specimens (n = 8 each per group) were subjected to 5 days of erosion/abrasion cycling: erosion (5 minutes, four times daily, 0.3% citric acid, pH 3.75); abrasion (15 seconds, twice daily, 45 strokes each, 150 g load, automated brushing machine); and fluoride treatment [15 seconds with abrasion and 45 seconds without abrasion; 275 p.p.m. fluoride (F- ) as sodium fluoride (NaF) in abrasive slurry]. Enamel and dentin specimens were exposed to artificial saliva between erosion and abrasion/F- treatment (1 hour) and at all other times (overnight). Non-contact profilometry was used to determine surface loss (SL) after 3 and 5 days of cycling. Data were analysed using three-way analysis of variance (ANOVA) (factors: abrasive/filament stiffness/time), with separate analyses conducted for enamel and dentin. RESULTS: For enamel, only 'cycling time' was found to affect SL, with 5 days of cycling resulting in a greater SL than 3 days of cycling. Overall, there was little SL for enamel (range: 0.76-1.85 µm). For dentin (SL range: 1.87-5.91 µm), significantly higher SL was found for 5 days of cycling versus 3 days of cycling, with particularly large differences for hard stiffness/high-level abrasive and medium stiffness/low-level abrasive. For high-level abrasive, after 5 days of cycling hard stiffness resulted in significantly higher SL than did medium stiffness, with no other significant differences according to stiffness. Overall, high-level abrasive resulted in significantly higher SL than did low-level abrasive, with strong effects for all combinations, except medium stiffness after 5 days. CONCLUSION: The interplay between abrasivity and filament stiffness appears to be more relevant for dentin than for enamel.


Assuntos
Abrasão Dentária/etiologia , Erosão Dentária/etiologia , Escovação Dentária/efeitos adversos , Cremes Dentais/efeitos adversos , Animais , Bovinos , Dentifrícios/efeitos adversos , Técnicas In Vitro
18.
Arch Pediatr ; 24(7): 659-666, 2017 Jul.
Artigo em Francês | MEDLINE | ID: mdl-28587727

RESUMO

Bruxism is defined as repetitive activity of the masticatory muscles, characterized by clenching the teeth or teeth grinding and/or by tapping and swaying. This study investigated sleep bruxism. The etiology is multifactorial: mainly central (neuropathic disorder, anxiety) but also genetic and local (posture, mouth breathing). The diagnosis is based primarily on the anamnesis and examination of dental wear and progression over time (photos and dental castings). A diagnostic guide is proposed in this article. Frequently found in children, bruxism is not always considered pathological. The severity criteria relate intensity (number of dental attrition facets) as well as the context found in children: anxiety, ventilation disorders, and fragile dental structures. Management is multidisciplinary and depends on the etiologic diagnosis.


Assuntos
Bruxismo do Sono/etiologia , Bruxismo do Sono/terapia , Adenoidectomia , Criança , Terapia Cognitivo-Comportamental , Árvores de Decisões , Prótese Dentária , Restauração Dentária Temporária , Revestimento de Dentadura , Prótese Parcial Removível , Humanos , Técnica de Expansão Palatina , Educação de Pacientes como Assunto , Fatores de Risco , Bruxismo do Sono/diagnóstico , Tonsilectomia , Abrasão Dentária/etiologia , Abrasão Dentária/terapia
19.
J Dent ; 63: 14-20, 2017 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-28478212

RESUMO

OBJECTIVE: The aim of this study is to characterize the morphological and histological features of NCCLs in a group of extracted teeth using a focus variation optical microscopic technique that is capable of detecting minute variation in surface topography. METHODS: Twenty three extracted teeth containing NCCLs were collected. Histological features of the surface and longitudinal cross sections were examined using a focus variation microscope (FVM). RESULTS: The sample included 8 teeth with wedge-shaped lesions; the remaining 15 contained saucer-shaped lesions. Wedge-shaped lesions showed obliterated dentinal tubules, parallel furrows and micro-fractures in the surface; longitudinal cross sections revealed subsurface micro-fractures extending toward the pulp chamber. The surfaces of typical saucer-shaped lesions were smooth and relatively featureless. CONCLUSIONS: FVM imaging shows microstructures that are consistent with simultaneous erosion and toothbrush abrasion. Saucer shaped lesions have a smooth featureless surface as well as craters and dimples that could be attributed to uneven acid attack. In wedge-shaped lesions, the presence of scratches and furrows could be attributed to mechanical forces such as tooth brush abrasion. The furrows and in-surface micro-factures of wedge shaped lesions suggest a possible role of tensile stresses but require further investigation. CLINICAL SIGNIFICANCE: NCCLs present in two morphologies, either saucer-shaped or wedge-shaped. Erosion and toothbrush abrasion are important in both types of lesions. Tensile stresses due to occlusal loading may be important in some wedge-shaped lesions. Knowing the etiology of cervical lesions is the key for their prevention.


Assuntos
Microscopia/métodos , Desgaste dos Dentes/diagnóstico por imagem , Desgaste dos Dentes/patologia , Escovação Dentária/efeitos adversos , Dentina/patologia , Humanos , Imageamento Tridimensional/métodos , Propriedades de Superfície , Abrasão Dentária/diagnóstico por imagem , Abrasão Dentária/etiologia , Abrasão Dentária/patologia , Atrito Dentário/etiologia , Atrito Dentário/patologia , Colo do Dente/diagnóstico por imagem , Colo do Dente/patologia , Doenças Dentárias/patologia , Erosão Dentária/diagnóstico por imagem , Erosão Dentária/etiologia , Erosão Dentária/patologia , Fraturas dos Dentes/diagnóstico por imagem , Fraturas dos Dentes/etiologia , Fraturas dos Dentes/patologia , Desgaste dos Dentes/etiologia
20.
Prim Dent J ; 6(1): 32-36, 2017 Feb 28.
Artigo em Inglês | MEDLINE | ID: mdl-28376961

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.


Assuntos
Restauração Dentária Permanente/métodos , Abrasão Dentária/etiologia , Abrasão Dentária/terapia , Esmalte Dentário/patologia , Estética Dentária , Humanos , Fatores de Risco , Colo do Dente/patologia
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