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2.
Rev. cuba. estomatol ; 56(4): e1998, oct.-dez. 2019.
Article in Portuguese | LILACS | ID: biblio-1093255

ABSTRACT

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)


Subject(s)
Humans , Tooth Abrasion/etiology , Tooth Erosion/therapy , Review Literature as Topic , Tooth Attrition/etiology , Databases, Bibliographic , Diagnostic Techniques and Procedures/adverse effects
3.
Rev. Ateneo Argent. Odontol ; 57(2): 33-38, nov. 2017. ilus
Article in Spanish | LILACS | ID: biblio-973121

ABSTRACT

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.


Subject(s)
Humans , Tooth Cervix/injuries , Tooth Erosion/etiology , Tooth Erosion/prevention & control , Tooth Erosion/therapy , Tooth Abrasion/etiology , Tooth Abrasion/prevention & control , Tooth Abrasion/therapy , Tooth Wear , Crown Lengthening/methods , Tooth Attrition/etiology , Tooth Attrition/prevention & control , Tooth Attrition/therapy , Fluorides, Topical/administration & dosage , Tooth Remineralization/methods , Preventive Dentistry , Dental Occlusion , Malocclusion/prevention & control
5.
Article in English | IMSEAR | ID: sea-154596

ABSTRACT

Background: Abrasive wear is one of the most common type of wear that not only affect teeth, as also dental restorations. Thus to investigate one of the etiological factors as tooth brushing procedure is clinical relevant in order to select the best material combination that may prevent damage of resin dental restoration's abrasion. Aims: This study evaluated the influence of tooth brushing on mass loss and surface roughness of direct Venus (Vs) and indirect Signum (Sg) resin composites, with and without a surface sealant, Fortify (F). Materials and Methods: Twenty‑four specimens were prepared with each resin composite, using their proprietary curing units, according to manufacturer’s instructions. All the specimens were polished and ultrasonically cleaned in distilled water for 5 minutes. Half of the specimens of each resin (n = 12) were covered with F (VsF and SgF), except for the control (C) specimens (VsC and SgC), which were not sealed. Mass loss (ML) as well as surface roughness (Ra) was measured for all the specimens. Then, the specimens were subjected to toothbrush–dentifrice abrasion, using a testing machine for 67.000 brushing strokes, in an abrasive slurry. After brushing simulation, the specimens were removed from the holder, rinsed thoroughly and blot dried with soft absorbent paper. The abrasion of the material was quantitatively determined with final measurements of ML and surface roughness, using the method described above. Results: ML data were analyzed by two‑way analysis of variance (ANOVA) and the analysis indicated that resin composites were not statistically different; however, the specimens sealed with F showed higher ML. Ra mean values of the groups VsF and SgF significantly increased. Conclusion: Tooth brushing affects mainly the roughness of the direct and indirect resin composites veneered with a sealant.


Subject(s)
Composite Resins/chemistry , Dental Veneers , Pit and Fissure Sealants , Tooth Abrasion/etiology , Toothbrushing/adverse effects
7.
Article in Portuguese | LILACS | ID: lil-724205

ABSTRACT

Objetivo: determinar as características clínicas e a prevalência de lesões cervicais não-cariosas (LCNCs) em pacientes adultos. Métodos: a coleta dos dados foi realizada por meio de exame clínico e questionário. Um total de 491 dentes foi avaliado em 23 pacientes, dos quais 121 dentes apresentavam LCNCs. Critérios como forma, dimensão horizontal e vertical, profundidade, término, classificação e sensibilidade dentinária das lesões, além dos fatores oclusais fizeram parte da avaliação. Os dados foram submetidos à análise estatística pelo teste não paramétrico Exato de Fischer, com nível de significância de 5%. Uma análise descritiva foi utilizada para dados que caracterizavam a amostra no nível do indivíduo (sexo e fatores etiológicos das LCNCs) e no nível do dente (presença, tipo e formato da lesão; dentes e faces mais comprometidos). Resultados: um total de 24,64% dos dentes apresentava algum tipo de lesão cervical, sendo os dentes pré-molares inferiores os mais acometidos (30,58%). A abfração foi a lesão mais presente (52,89%). A face vestibular foi mais comprometida pelas LCNCs com significância estatística (p = 0,013). As cavidades rasas foram mais prevalentes em todos os tipos de lesões (p = 0,001). Facetas de desgaste foram bastante encontradas nos dentes com LCNCs (p = 0,008). A sensibilidade dentinária severa foi mais observada em dentes com abrasão (p=0,037). Conclusão: dentre as LCNCs, as lesões de abfração foram mais encontradas em pessoas do sexo feminino, nas faces vestibulares de dentes pré-molares e com profundidade rasa...


Objective: To determine the clinical characteristics and prevalence ofnon-carious cervical lesions (NCCL) in adult patients. Method: Data were collected by clinical examination and questionnaire-based interviews. A total of 491 teeth from 23 patients were examined, resulting in a sample of 121 teeth with NCCL. The evaluation criteria included shape, horizontal and vertical dimensions, depth, cervical margin, classification, presence of dentinal hypersensitivity and occlusal factors. The data were subjected to statistical analysis by the non-parametric Fisher?s exact test at a 5% significance level. Descriptive analysis was used for the data that characterized the sample at individual level (gender and NCCL etiologic factors) and tooth level (presence, type and shape of the lesion, and the most affected teeth and surfaces). Results: As much as 24.64% of the teeth presented some kind of cervical lesion, the mandibular premolars being the most affected (30.58%). Abfraction was the prevalent type of lesion (52.89%). The buccal surface was the most affected by NCCL (p=0.013). Shallow cavities were the most prevailing lesion type (p=0.001). Wear facets were largely found in teeth with NCCL (p=0.008). Severe dentinal hypersensitivity was mainly observed in abraded teeth (0.037).Conclusion: Among the types of NCCL, abfraction lesions were mostly found in female patients, in the buccal surface of premolars and had shallow depth...


Subject(s)
Humans , Male , Female , Adolescent , Middle Aged , Young Adult , Tooth Abrasion/etiology , Tooth Erosion/diagnosis , Dental Occlusion , Statistics, Nonparametric , Cross-Sectional Studies , Surveys and Questionnaires
8.
Article in English | IMSEAR | ID: sea-140135

ABSTRACT

Background: The tooth whitening substances for extrinsic use that are available in Brazil contain hydrogen peroxide or carbamide peroxide. Several studies have attributed the appearance of lesions in the enamel morphology, including hypersensitivity, to these substances. Such lesions justify fluoride therapy and application of infrared lasers, among other procedures. However, there is no consensus among researchers regarding the relevance of the severity of lesions detected on the tooth surface. Objectives: The present study was carried out with an aim of evaluating in vitro the effects of the hydrogen peroxide, carbamide peroxide and sodium bicarbonate contained in dentifrice formulations, on human tooth enamel. Materials and Methods: After darkening process in laboratory, human premolars were brushed using dentifrice containing the two whitening substances (Rembrandt - carbamide peroxide and Mentadent - hydrogen peroxide) and the abrasive product (Colgate - sodium bicarbonate). The degree of specimen staining before and after this procedure was determined using spectrophotometry. Scanning electron microscopy (SEM) was used to obtain images, which were analyzed to show the nature of the lesions that appeared on the enamel surface. Results: The effectiveness of the whitening caused by hydrogen peroxide and carbamide peroxide and the abrasion caused by bicarbonate were confirmed, given that the treated test pieces returned to their original coloration. Based on SEM, evaluation of the enamel surfaces subjected to the test products showed that different types of morphologic lesions of varying severity appeared. Conclusions: Whitening dentifrice containing hydrogen peroxide and carbamide peroxide produced lesions on the enamel surface such that the greatest sequelae were associated with exposure to hydrogen peroxide.


Subject(s)
Carbonated Beverages , Coffee , Dental Enamel/drug effects , Dental Enamel/ultrastructure , Dentifrices/therapeutic use , Double-Blind Method , Humans , Hydrogen Peroxide/therapeutic use , Materials Testing , Microscopy, Electron, Scanning , Peroxides/pharmacology , Peroxides/therapeutic use , Polyvinyls/pharmacology , Porosity , Silicic Acid/pharmacology , Sodium Bicarbonate/therapeutic use , Spectrophotometry , Tea , Tobacco , Tooth Abrasion/etiology , Tooth Bleaching/methods , Tooth Bleaching Agents/therapeutic use , Tooth Discoloration/drug therapy , Toothbrushing/methods , Toothpastes/pharmacology , Urea/analogs & derivatives , Urea/therapeutic use , Wine , Carbonated Beverages , Coffee , Dental Enamel/drug effects , Dental Enamel/ultrastructure , Dentifrices/therapeutic use , Double-Blind Method , Humans , Hydrogen Peroxide/therapeutic use , Materials Testing , Microscopy, Electron, Scanning , Peroxides/pharmacology , Peroxides/therapeutic use , Polyvinyls/pharmacology , Porosity , Silicic Acid/pharmacology , Sodium Bicarbonate/therapeutic use , Spectrophotometry , Tea , Tobacco , Tooth Abrasion/etiology , Tooth Bleaching/methods , Tooth Bleaching Agents/therapeutic use , Tooth Discoloration/drug therapy , Toothbrushing/methods , Toothpastes/pharmacology , Urea/analogs & derivatives , Urea/therapeutic use , Wine
9.
Bauru; s.n; 2011. 91 p. ilus, tab, graf.
Thesis in Portuguese | LILACS, BBO | ID: biblio-865836

ABSTRACT

Neste estudo, foi avaliada a resistência ao desgaste abrasivo de uma resina composta, através de três diferentes métodos: do disco retificado, por escovação e do nanodurômetro. Nos dois primeiros métodos, foram utilizados 20 espécimes da resina Filtek Z250 (10 da cor Incisal e 10 da cor C4, ambos fotopolimerizados por 30 segundos cada) e 10 de polimetilmetacrilato (PMMA), atuando estes últimos como padrão de referência. Para os ensaios com o nanodurômetro, foi utilizado apenas um espécime de cada cor, assim como um único de PMMA, em cujas superfícies planas foram efetuadas sete medições, o que foi considerado equivalente a sete espécimes. No método do disco retificado, cada espécime de resina composta era confeccionado diretamente numa cavidade semicircular, localizada na periferia de um disco-suporte; os espécimes de PMMA consistiam em discos constituídos exclusivamente por este material; o desgaste de cada espécime era promovido por um disco de porcelana e seu conseqüente deslocamento era detectado por um palpador; assim, a taxa de desgaste era estabelecida, expressa em milímetros cúbicos por newton por segundo (mm3/N.s). No método de escovação, cada espécime cilíndrico ficava preso numa placa metálica, a qual era fixada no interior da máquina de escovação; sua perda de massa (em miligramas) era verificada através de uma balança analítica. No método do nanodurômetro, existiu apenas um espécime ci líndrico para cada condição, em cuja face plana superior eram feitos sete sulcos (equivalentes a sete espécimes); o coeficiente de atrito permitia estabelecer a respectiva resistência ao desgaste. Para cada método utilizado, os dados foram tratados estatisticamente, através de análise de variância (ANOVA) e de teste de Tukey. Pôde-se concluir que, através do disco retificado, a taxa de desgaste (em mm3/N.s) dos materiais foi: Incisal (0,6807) > C4 (0,5012) > PMMA (0,1439); que, através da escovação, a taxa de desgaste (em mg) foi de 5,40 para...


Abrasive wear of a composite resin, using three different methods (ground disc, toothbrushing and nanodurometer). The aim at this study was to evaluate the resistance to abrasive wear of a composite resin, using three different methods: ground disc, toothbrushing and nanodurometer. At the first two methods were employed 20 specimens of Filtek Z250 composite resin (10 of Incisal and 10 of C4, both the colors cured for 30 seconds each one) and 10 of polymethylmethacrylate (PMMA), the latter acting as a reference standard. For the tests with the nanodurometer it was used only one specimen of each color, as well as just one of PMMA, in whose flat surfaces seven measurements were made, what was considered equivalent to seven specimens. At the ground disc method, each composite resin specimen was directly made on a semicircular cavity located on the periphery of a supporting disc; PMMA specimens consisted of discs made up exclusively with this material; the wear of each specimen was promoted by a ceramic disc and its consequent displacement was detected by a sensor; thus, the wear rate was established, expressed in cubic millimeters per newton per second (mm3/N.s). At the toothbrushing method, each cylindrical specimen was trapped in a metal plate, which was fixed inside the machine brushing; its weight loss (in milligrams) was verified by an analytical balance. At the nanodurometer method, there was only one cylindrical specimen for each condition, in whose flat upper face seven grooves were made (what was equivalent to seven specimens); the coefficient of friction was used to establish its wear resistance. For each method, data were statistically analyzed by ANOVA and Tukey's test. It could be concluded that, by ground disc method, materials wear rate (in mm3/N.s) was Incisal (0.6807) > C4 (0.5012) > PMMA (0.1439); by brushing method, materials wear rate (in mg) was 5.40 for Incisal, 9.35 for C4 and 5.88 for PMMA, without significant difference...


Subject(s)
Tooth Abrasion/etiology , Toothbrushing/adverse effects , Composite Resins/chemistry , Hardness Tests , Materials Testing , Polymerization , Surface Properties , Time Factors
10.
Full dent. sci ; 1(3): 305-310, abr.-jun. 2010. ilus, tab
Article in Portuguese | LILACS, BBO | ID: lil-642955

ABSTRACT

O presente estudo avaliou a tomada de decisão dos cirurgiões-dentistas da cidade de São Miguel do Oeste, Santa Catarina, em relação à classificação, etiologia e o tratamento das lesões cervicais não-cariosas. A pesquisa foi descritiva e utilizou como instrumento de pesquisa questionários com perguntas a respeito de duas imagens clínicas de lesões cervicais não-cariosas. A amostra contou com 31 cirurgiões-dentistas sócios da Associação Brasileira de Odontologia de Santa Catarina. Os resultados mostraram que a maioria dos cirurgiões-dentistas classificou a lesão da primeira figura como abrasão (54,8%), sendo a sua principal etiologia a escovação dentária (87,1%) e o tratamento escolhido foi a proservação com aplicações tópicas de flúor e desensibilizantes (90,3%). A segunda figura foi classificada como abfração (67,7%), sendo as forças oclusais a sua principal etiologia (41,9%), seguida pela escovação dentária (38,7%) e o tratamento de escolha foi restaurador (87,1%). Verificou-se que apesar da dificuldade na determinação do diagnóstico, das causas e do tratamento desse tipo de lesão, a maioria dos profissionais tomou decisões semelhantes frente às lesões cervicais não-cariosas.


The present study has evaluated the decision making of the dentists acting in São Miguel do Oeste, Santa Catarina, related to the classification, etiology and treatment of non-carious cervical lesions. The study was descriptive and used as research instrument, questionnaires with questions about two clinical images of non-carious cervical lesions. The sample was composed of 31 dentists, all belonging to the Association of Brazilian Dentists of the state of Santa Catarina. The results show that most dentists classified the first picture lesion as abrasion (54.8%). The toothbrushing of the teeth was the preferred etiology (87.1%) and the chosen treatment was follow up with topical fluoride and desensibilizing agents (90.3%). The second picture was classified as abfraction (67.7%) and the occlusal forces were the main etiology (41.9%), followed by toothbrushing (38.7%) and the treatment of choice was the restoration (87.1%). It was concluded that in spite of the difficulty in determining the diagnosis, the etiology and treatment of this type of injury, most professionals decision maked cervical lesions similar.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Tooth Abrasion/diagnosis , Tooth Abrasion/etiology , Decision Making , Dentists , Tooth Wear/diagnosis , Tooth Wear/etiology , Tooth Erosion/diagnosis , Tooth Erosion/etiology , Epidemiology, Descriptive , Surveys and Questionnaires
11.
Rev. Asoc. Odontol. Argent ; 97(2): 147-151, abr.-mayo 2009. ilus, tab
Article in Spanish | LILACS | ID: lil-528982

ABSTRACT

El objetivo del presente trabajo fue evaluar la resistencia al desgaste de seis materiales restauradoresestéticos, utilizando como abrasivo una pasta dentífrica a base de bicarbonato de sodio y un dispositivo ad hoc con cepillos dentales, simulando una situación clínica, para considerar su utilización en restauraciones de lesiones cervicales por abrasión. Se confeccionaron 10 probetas (n =60) de cada material, quedando conformados los siguientes grupos: F (F2000/3M ESPE); A (A110/3M ESPE); DY (Dyract Flow/Dentsply); T (Tetric Ceram/Vivadent); PH (Photac Fil/ 3M ESPE) y PF (Perma Flo/Ultradent). Se registró la masa inicial para cada espécimen (PI) previamente al ensayo experimental; posteriormente las probetas fueron pesadas nuevamente para determinar la masa final (PF) a los 7, 30 y 60 días. De la diferencia entre los valores registrados (PI/PF), en losdiferentes períodos de tiempo, se dedujo la pérdida total de masa para cada material. El mayor desgaste lo presentó el ionómero vítreo híbrido con diferencias significativas con respecto a los otros materiales y sólo a los siete días.


Subject(s)
Tooth Abrasion/etiology , Dental Restoration Wear/statistics & numerical data , Tooth Cervix/injuries , Composite Resins/chemistry , Dental Restoration, Permanent/instrumentation , Analysis of Variance , Data Interpretation, Statistical
12.
Article in English | IMSEAR | ID: sea-139711

ABSTRACT

Background/Aims: The use of cold water during toothbrushing can cause dentine sensitivity and, to avoid this painful stimulus, some patients used to rinse their mouths with warm water when brushing. Thus, the objective of this study was to determine the effect of water temperature on the dental root surface during toothbrushing. Materials and Methods : Fragments of bovine dental roots were submitted to 15,000 strokes in a toothbrushing machine using a slurry of toothpaste/water, medium brushes, and a 200-g load. They were randomly divided into two groups: toothbrushing with cold water or with hot water. Tooth wear was measured by loss of weight and by tissue height. Statistical Analysis: The weight and height data obtained in 17 and 10 replicas respectively are presented as mean ± standard error of mean. The data were compared using the Kolgomorov-Smirnof (Lilliefors) test followed by one-way ANOVA. The level of significance was 5% (P < 0.05). Results: There were no significant differences between the two experimental groups. The mean percentages of weight losses were 5.61 ± 1.66 for cold water and 6.25 ± 1.98 for hot water. The mean dentine height losses were 51.02 ± 15.92 µm for cold water and 63.54 ± 17.75 µm for hot water. Conclusion: The use of warm water during toothbrushing promoted root dentine wear similar to that produced by the use of cold water. The results suggest that warm or cold water may be used during toothbrushing without any additional damage to the patients' dental hard tissues.


Subject(s)
Animals , Cattle , Cold Temperature , Dentin/pathology , Equipment Design , Hot Temperature , Random Allocation , Stress, Mechanical , Tooth Abrasion/etiology , Tooth Root/pathology , Toothbrushing/instrumentation , Toothbrushing/methods , Toothpastes/chemistry , Water/chemistry
13.
Braz. oral res ; 22(1): 11-17, Jan.-Mar. 2008. ilus, tab
Article in English | LILACS | ID: lil-480577

ABSTRACT

Noncarious cervical lesions (NCCLs) are considered to be of multifactorial origin, normally associated with inadequate brushing. This study assessed the influence in vitro of simulated brushing on NCCL formation. Fifteen human premolars were submitted to brushing in the cementoenamel junction region, using hard-, medium- and soft-bristled brushes associated with a toothpaste of medium abrasiveness under a 200 g load, at a speed of 356 rpm for 100 minutes. The surface topography of the region was analyzed before and after brushing, by means of a laser interferometer, using "cut-off" values of 0.25 and considering roughness values in mm. The initial roughness (mm) results for dentin (D / bristle consistency: 1 - soft, 2 - medium and 3 - hard) were as follows: (D1) 1.25 ± 0.45; (D2) 1.12 ± 0.44; (D3) 1.05 ± 0.41. For enamel (E / bristle consistency: 1 - soft, 2 - medium and 3 - hard), the initial results were: (E1) 1.18 ± 0.35; (E2) 1.32 ± 0.25; (E3) 1.50 ± 0.38. After brushing, the following were the values for dentin: (D1) 2.32 ± 1.99; (D2) 3.30 ± 0.96; (D3) Over 500. For enamel, the values after brushing were: (E1) 1.37 ± 0.31; (E2) 2.15 ± 0.90; (E3) 1.22 ± 0.47. Based on the results of the ANOVA and Tukey statistical analyses (a = .05) it was concluded that soft, medium and hard brushes are not capable of abrading enamel, whereas dentin showed changes in surface roughness by the action of medium- and hard-bristled brushes.


Subject(s)
Humans , Dental Enamel , Dentin , Dentifrices/adverse effects , Tooth Abrasion/etiology , Toothbrushing/adverse effects , Analysis of Variance , Dental Devices, Home Care , Dentin/pathology , Hardness , Tooth Cervix/drug effects , Tooth Cervix/pathology , Toothpastes/adverse effects
14.
Braz. oral res ; 22(2): 112-118, 2008. ilus, tab
Article in English | LILACS | ID: lil-485949

ABSTRACT

This study evaluated weight loss and surface roughening after toothbrushing of different resin composites: one packable (Solitaire 2, Heraeus Kulzer), one microhybrid (Charisma, Heraeus Kulzer), one nanohybrid (Simile, Pentron) and one microfilled (Durafill VS, Heraeus Kulzer). Cylindrical specimens (n = 20) were prepared. Half of the samples were submitted to 60,000 strokes, at 4 Hz, with a dentifrice-water slurry. Control samples (n = 10) remained stored at 37°C. Pre- and post-abrasion parameters for weight (mg) and surface roughness (Ra, µm) were determined on an analytical balance and a surface profilometer. Data were separately submitted to Repeated Measures ANOVA and Tukey's test (a = 0.05). Percentages of weight loss were analyzed by ANOVA and Tukey's test (a = 0.05). The relationship between both evaluations was assessed by Pearson's test (a = 0.05). The means ( percent) for weight loss (standard deviation) were 0.65(0.2), 0.93(0.2), 1.25(0.6) and 1.25(0.4) for Simile, Durafill, Charisma and Solitaire, respectively. Baseline roughness means ranged from 0.065(0.01), 0.071(0.01), 0.066(0.02) and 0.074(0.01) for Simile, Durafill, Charisma and Solitaire, respectively, to 0.105(0.04), 0.117(0.03), 0.161(0.03) and 0.214(0.07) after testing. The composites with larger fillers presented higher weight loss and roughening than the finer materials (p < 0.05). For both evaluations, control specimens showed no significant alteration. No significant relationship between loss of weight and roughness alteration was detected (r = 0.322, p = 0.429).


Subject(s)
Acrylic Resins/chemistry , Composite Resins/chemistry , Dental Enamel/chemistry , Dentifrices/chemistry , Polyurethanes/chemistry , Tooth Abrasion/etiology , Toothbrushing/adverse effects , Analysis of Variance , Dental Enamel/ultrastructure , Dentifrices/adverse effects , Materials Testing , Surface Properties
15.
Braz. oral res ; 22(2): 132-138, 2008. ilus
Article in English | LILACS | ID: lil-485952

ABSTRACT

This in situ study investigated, using scanning electron microscopy, the effect of stimulated saliva on the enamel surface of bovine and human substrates submitted to erosion followed by brushing abrasion immediately or after one hour. During 2 experimental 7-day crossover phases, 9 previously selected volunteers wore intraoral palatal devices, with 12 enamel specimens (6 human and 6 bovine). In the first phase, the volunteers immersed the device for 5 minutes in 150 ml of a cola drink, 4 times a day (8h00, 12h00, 16h00 and 20h00). Immediately after the immersions, no treatment was performed in 4 specimens (ERO), 4 other specimens were immediately brushed (0 min) using a fluoride dentifrice and the device was replaced into the mouth. After 60 min, the other 4 specimens were brushed. In the second phase, the procedures were repeated but, after the immersions, the volunteers stimulated the salivary flow rate by chewing a sugar-free gum for 30 min. Enamel superficial alterations of all specimens were then evaluated using a scanning electron microscope. Enamel prism core dissolution was seen on the surfaces submitted to erosion, while on those submitted to erosion and to abrasion (both at 0 and 60 min) a more homogeneous enamel surface was observed, probably due to the removal of the altered superficial prism layer. For all the other variables - enamel substrate and salivary stimulation -, the microscopic pattern of the enamel specimens was similar.


Subject(s)
Adult , Animals , Cattle , Female , Humans , Male , Young Adult , Dental Enamel/ultrastructure , Saliva/chemistry , Tooth Abrasion/pathology , Tooth Erosion/pathology , Toothbrushing/adverse effects , Beverages/adverse effects , Chewing Gum , Carbonated Beverages/adverse effects , Dental Enamel Solubility , Dental Caries/prevention & control , Dental Enamel/drug effects , Food , Hydrogen-Ion Concentration , Microscopy, Electron, Scanning , Surface Properties , Saliva/physiology , Tooth Remineralization , Tooth Abrasion/etiology , Tooth Erosion/etiology , Young Adult
16.
Rev. Asoc. Odontol. Argent ; 95(3): 235-242, jun.-jul. 2007. ilus
Article in Spanish | LILACS | ID: lil-475023

ABSTRACT

Se denomina abfracción a la lesión en forma de cuña en el límite amelocementario (LAC) causada por fuerzas oclusales excéntricas que llevan a la flexión dental provocando la ruptura de prismas de esmalte, cemento y dentina. Los objetivos de este trabajo son: 1) comprender los mecanismos que generan la abfracción, su etiología, desarrollo y patología generada; 2) cuáles trabajos de investigación fundamentan la etiopatogenia de estas lesiones; 3) describir las características clínica; 4) valorar la abfracción y su importancia en el futuro como lesión en las próximas generaciones; 5) establecer las situaciones en que estas lesiones cervicales deben ser restauradas.


Subject(s)
Humans , Tooth Abrasion/etiology , Tooth Abrasion/pathology , Tooth Cervix/injuries , Tooth Erosion/etiology , Tooth Erosion/pathology , Tooth Abrasion/therapy , Crowns/adverse effects , Tooth Erosion/therapy , Stress, Psychological/physiopathology , Dental Occlusion, Traumatic/physiopathology
17.
Braz. oral res ; 20(2): 148-154, Apr.-June 2006. ilus
Article in English | LILACS | ID: lil-432192

ABSTRACT

Este estudo avaliou o amolecimento superficial e o desgaste do esmalte bovino erodido com ou sem influência da escovação. Cinco voluntários fizeram parte deste estudo in situ de 5 dias. Eles usaram aparelhos palatinos de acrílico contendo 6 blocos de esmalte bovino divididos em 2 fileiras com 3 blocos, cada fileira correspondeu a um grupo em estudo: erosão sem escovação dentária (GI) e erosão seguida de escovação dentária (GII). Os blocos foram submetidos à erosão por imersão do aparelho em uma bebida à base de cola por 10 minutos, 4 vezes ao dia. Depois disso, nenhum tratamento foi realizado em uma fileira (GI), enquanto a outra fileira foi escovada (GII). Em seguida, o aparelho foi recolocado na boca. Alterações do esmalte foram determinadas por teste de perfilometria e microdureza. Os dados foram analisados usando-se teste t de Student (p < 0,05). O valor médio de desgaste (µm) e da porcentagem de perda de microdureza superficial (%PDS) foi respectivamente: GI – 2,77 ± 1,21/91,61 ± 3,68 e GII – 3,80 ± 0,91/58,77 ± 11,47. Houve uma diferença estatisticamente significante no desgaste (p = 0,001) e na %PDS (p = 0,001) entre grupos. Conclui-se que o desgaste foi mais pronunciado quando associado à abrasão pela escovação. Entretanto, a escovação promoveu menor %PDS, devido à remoção da camada de esmalte superficial alterada.


Subject(s)
Adult , Animals , Cattle , Humans , Dental Enamel , Tooth Abrasion/etiology , Tooth Erosion/etiology , Toothbrushing/adverse effects , Beverages/adverse effects
19.
Braz. oral res ; 18(2): 156-161, Apr.-Jun. 2004. tab
Article in English | LILACS | ID: lil-363267

ABSTRACT

O objetivo deste estudo foi mensurar a perda de massa e as alterações de rugosidade superficial de diferentes marcas de resinas compostas "flow" após teste de escovação simulada. A hipótese nula testada foi de que não haveria diferença de massa e rugosidade de superfície após o teste e de que não haveria correlação entre essas variáveis. Os materiais testados foram: Aeliteflo (Bisco), Flow-It (Pentron), Flow-It LF (Pentron), Natural Flow (DFL) e Wave (SDI). As resinas compostas Z100 (3M/ESPE) e Silux Plus (3M/ESPE) foram utilizadas como controle. Doze espécimes (5 mm de diâmetro, 3 mm de espessura) de cada material foram confeccionados de acordo com as instruções do fabricante. O teste foi conduzido em uma máquina de escovação simulada, em todos os espécimes de todos os materiais, totalizando 100.000 ciclos. Antes e depois do teste, a massa e a rugosidade de cada material foram aferidas por uma balança analítica Sartorius de 0,0001 g de precisão e pelo equipamento Hommel Tester T1000, respectivamente. Os valores obtidos foram comparados pelos testes t-pareado e Tukey (p < 0,05). Todos os materiais apresentaram diferenças estatísticas de perda de massa entre os valores iniciais e finais, com exceção da resina Flow-It LF. Entretanto, nenhuma diferença foi observada quando se comparou a porcentagem de perda de massa entre os diferentes materiais testados. Todos os materiais tornaram-se mais rugosos, sendo Wave, estatisticamente, o mais rugoso. As resinas compostas "flow" não demonstraram superioridade em relação aos materiais de controle, devendo-se esperar o desgaste por perda de massa do material e maior rugosidade após a ação da escovação. A hipótese nula antecipada foi parcialmente aceita.


Subject(s)
Composite Resins/chemistry , Toothbrushing , Tooth Abrasion/etiology , Dental Restoration Wear , Materials Testing , Surface Properties , Toothbrushing/adverse effects
20.
Braz. oral res ; 18(2): 168-173, Apr.-Jun. 2004. graf
Article in English | LILACS | ID: lil-363269

ABSTRACT

Os dentifrícios atualmente encontrados no mercado contêm muitas substâncias anticariogênicas, flúor e abrasivos para higienizar melhor as superfícies dentárias, remover a placa dentária, melhorar o fluxo salivar e a capacidade tampão e reduzir as colônias bacterianas, como de S. mutans, agente causador da cárie dentária. O objetivo deste estudo foi avaliar a possibilidade de remover placa adequadamente usando um dentifrício experimental, sem abrasivos nem agentes antiplaca, à base de óleo de amêndoas: Titoil. Foi realizado um estudo com 80 recrutas de 18 anos de idade do Tiro de Guerra de Araçatuba - SP. A coleta de amostras de saliva e a coloração da placa dentária foram realizadas ao início e ao final de 28 dias de escovação com um dentifrício de baixa abrasividade (Grupo 1: 40 voluntários) ou com Titoil (Grupo 2: 40 voluntários). Através de análises estatísticas, os resultados mostraram que o dentifrício experimental: não interfere no fluxo salivar; promove maior redução de placa dentária do que o dentifrício de baixa abrasividade; melhora a capacidade tampão e diminui o número de S. mutans salivares (kit Caritest-SM) tanto quanto o dentifrício regular. Concluiu-se que, se as indústrias de dentifrício substituíssem os abrasivos dos dentifrícios por óleo vegetal, estes seriam mais eficientes na manutenção da saúde bucal e provocariam menos abrasão.


Subject(s)
Humans , Male , Adolescent , Dental Plaque/drug therapy , Dentifrices/therapeutic use , Plant Oils/therapeutic use , Toothbrushing , Dental Plaque Index , Dental Caries/prevention & control , Dental Plaque/prevention & control , Dentifrices/adverse effects , Plant Oils/pharmacology , Statistics, Nonparametric , Saliva , Streptococcus mutans/drug effects , Tooth Abrasion/etiology , Toothbrushing/adverse effects
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