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1.
Indian J Dent Res ; 29(5): 672-677, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30409952

RESUMO

Denture stomatitis, periodontitis, and peri-implantitis are the growing problems in restorative dentistry. Chemicals play an important role as an adjuvant to mechanical cleaning of teeth, implants, surrounding tissues, and prostheses. Current mouth rinses are reported to affect the tissues and prostheses if used on a long-term basis. Sodium bicarbonate, the common baking soda, has been reported to be versatile. A search of the resources through Medline and Google Scholar was made to understand the current status of the mouth rinses and the use of sodium bicarbonate. Different MeSH and search criteria were used for the different search engines. Baking soda, being a common household item, with its ready availability, safety, minimal abrasivity, and bactericidal property makes it a patient-friendly mouthwash, component in the dentifrice, or chewing gum, which can be used on a long-term basis as an adjunct virtually free of any side effects.


Assuntos
Antissépticos Bucais , Bicarbonato de Sódio , Antibacterianos , Goma de Mascar , Cárie Dentária/prevenção & controle , Dentifrícios , Higienizadores de Dentadura , Humanos , Antissépticos Bucais/efeitos adversos , Higiene Bucal , Peri-Implantite/prevenção & controle , Segurança , Bicarbonato de Sódio/administração & dosagem , Bicarbonato de Sódio/farmacologia , Estomatite/prevenção & controle , Estomatite sob Prótese/prevenção & controle , Abrasão Dentária/induzido quimicamente , Abrasão Dentária/prevenção & controle , Clareadores Dentários
2.
Arch Oral Biol ; 95: 68-73, 2018 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-30064032

RESUMO

OBJECTIVE: Palm oil has demonstrated preventive potential against initial erosive demineralization in vitro. This in situ study evaluated the effect of palm oil alone or associated with stannous-containing (Sn) solution on preventing enamel loss from an erosive/abrasive challenge. DESIGN: This single-blind, randomized, crossover in situ/ex vivo study was developed in four phases (one per group of five days) with sixteen volunteers. Enamel blocks (n = 256) were allocated to groups according to the treatment: Palm oil; Palm oil plus Sn solution; Sn solution - positive control; and Deionized water - negative control. Half of the enamel blocks of each group was subjected to erosion and the other half to erosion + abrasion. The daily ex vivo protocol consisted of four citric acid immersions (2 min). Before the first and third acid exposure, the blocks were treated with the test solutions (1 drop/block) for 1 min followed by acid immersion and abrasive challenge (toothpaste was applied on all blocks and half were brushed for 15 s/block). Enamel loss was quantified profilometrically and data were analyzed by two-way ANOVA and Tukey's test (p < 0.05). RESULTS: A significant difference was found for type of treatment (p < 0.001); wear condition (p = 0.38) and the treatment x condition interaction (p = 0.33) was non-significant. Palm oil associated or not to Sn solution significantly reduced enamel wear in comparison with the negative control but did not differ from the positive control (p > 0.05). CONCLUSIONS: Palm oil was able to prevent enamel loss under erosive and erosive + abrasive challenges in a similar extend to stannous-containing commercial solution.


Assuntos
Óleo de Palmeira/farmacologia , Fluoretos de Estanho/farmacologia , Abrasão Dentária/prevenção & controle , Erosão Dentária/prevenção & controle , Adolescente , Adulto , Animais , Bovinos , Estudos Cross-Over , Feminino , Humanos , Técnicas In Vitro , Masculino , Método Simples-Cego
3.
J Appl Oral Sci ; 26: e20170029, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29742259

RESUMO

Literature has reported positive results regarding the use of lasers in the control of erosive lesions; however, evaluating whether they are effective in the control of the progression of erosive/abrasive lesions is important. Objectives This study aimed to evaluate the effect of the Er:YAG laser irradiation in controlling the progression of erosion associated with abrasive lesions in enamel. Material and methods Bovine incisors were sectioned, flattened and polished. Forty-eight enamel slabs were subjected to treatment in an intraoral phase. Twelve volunteers used an intraoral appliance containing one slab that was irradiated with an Er:YAG laser (5.2 J/cm2, 85 mJ, 2 Hz) and another non-irradiated slab on each side of the appliance, during one phase of 5 d, under a split-mouth design. Devices were subjected to erosive challenges (1% citric acid, 5 min, 3 times a day) and abrasive challenges one h after (brushing force of 1.5 N for 15 s) randomly and independently on each side of the device. Measurements of enamel loss were performed via 3D optical profilometry (µm). We analyzed data using the Kruskal-Wallis and Mann-Whitney tests and morphological characteristics via scanning electron microscopy. Results Following erosive and abrasive challenges, the group that was irradiated with the Er:YAG laser presented less loss of structure than the non-irradiated group. The group that underwent erosion and irradiation did not exhibit a significant difference from the non-irradiated group. Conclusion Irradiation with the Er:YAG laser did not control the loss of structure of enamel subjected to erosion but did control abrasion after erosion.


Assuntos
Esmalte Dentário/efeitos da radiação , Lasers de Estado Sólido/uso terapêutico , Abrasão Dentária/prevenção & controle , Erosão Dentária/prevenção & controle , Animais , Bovinos , Ácido Cítrico/química , Esmalte Dentário/efeitos dos fármacos , Progressão da Doença , Testes de Dureza , Imageamento Tridimensional , Teste de Materiais , Microscopia Eletrônica de Varredura , Reprodutibilidade dos Testes , Estatísticas não Paramétricas , Propriedades de Superfície/efeitos da radiação
4.
J Dent ; 73: 45-49, 2018 06.
Artigo em Inglês | MEDLINE | ID: mdl-29621568

RESUMO

OBJECTIVE: This study compared the effect of an experimental NaF/TiF4 mouth rinse with a commercial tin/F mouth rinse on the prevention of tooth wear in situ. METHODS: Fifteen subjects took part in this crossover and double-blind study, in which they wore a palatal appliance with 8 bovine teeth samples (4 enamel and 4 root dentine) in each of 3 phases (5 days each). Half of the samples were subjected to erosive challenges, and the other half to erosive plus abrasive challenges. The phases corresponded to the use of 1) Experimental solution containing NaF/TiF4 (189 ppm Ti+4, 500 ppm F-, pH 4.4); 2) commercial solution containing SnCl2/NaF/AmF (800 ppm Sn+2, 500 ppm F-, pH 4.5, Elmex®/GABA, positive control); 3) distilled water (negative control). Erosive challenges were performed using 0.1% citric acid (pH 2.5) for 90 s 4 times per day. The abrasion was done using a toothbrush and slurry of fluoride toothpaste, for 15 s 2 times per day. Thereafter, the subjects rinsed with the tested mouth rinse for 60s. Tooth wear was measured using contact profilometry (µm) and submitted to a two-way RM ANOVA/Bonferroni test (p < 0.05). RESULTS: No significant differences were detected between the experimental and the commercial mouth rinses, regardless of the challenge. Both fluoride mouth rinses were able to significantly reduce tooth wear compared to the negative control (p < 0.0001). No significant differences were detected with respect to tooth wear between the challenges (erosion and erosion plus abrasion). CONCLUSION: The experimental NaF/TiF4 mouth rinse has a similar protective effect to the commercial one against tooth wear in situ. CLINICAL SIGNIFICANCE: The experimental NaF/TiF4 solution protected against tooth wear in situ, regardless of the challenge (erosion or erosion plus abrasion), for both enamel and dentine, similarly to a commercial solution (tin/F-Elmex®) applied for this proposal. This result supports the conduction of clinical trials and a possible application of this solution in the future.


Assuntos
Fluoretos/uso terapêutico , Antissépticos Bucais/uso terapêutico , Fluoreto de Sódio/uso terapêutico , Titânio/uso terapêutico , Abrasão Dentária/prevenção & controle , Erosão Dentária/prevenção & controle , Adolescente , Adulto , Animais , Brasil , Bovinos , Estudos Cross-Over , Esmalte Dentário/efeitos dos fármacos , Dentina , Diaminas/uso terapêutico , Método Duplo-Cego , Feminino , Humanos , Masculino , Antissépticos Bucais/química , Compostos de Estanho/uso terapêutico , Escovação Dentária , Cremes Dentais/uso terapêutico , Adulto Jovem
5.
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
6.
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
7.
J Contemp Dent Pract ; 18(10): 859-866, 2017 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-28989121

RESUMO

AIM: This study evaluated the efficacy of self-etching adhesive systems associated or not associated with the neodymium-doped yttrium aluminum garnet (Nd:YAG) laser on the protection against enamel erosive/abrasive wear. MATERIALS AND METHODS: Bovine enamel specimens were demineralized with 0.3% citric acid (5 minutes). The samples were randomly assigned to eight groups (n = 20): SB - Single Bond Universal (3M/ESPE); SB+L - Single Bond Universal + laser (80 mJ/10 Hz); FB - Futurabond U (Voco); FB+L -Futurabond U + laser; GEN - G-aenial bond (GC); GEN+L -G-aenial bond + laser; L - laser irradiation; and C - no treatment. The laser was applied before light curing. The samples were subjected to erosive/abrasive challenges (0.3% citric acid - 2 minutes and tooth brushing four times daily for 5 days). Enamel surface loss was recovered profilometrically by comparison of baseline and final profiles. The adhesive layer thickness, retention percentage of the protective layer, and microhardness of cured adhesive were measured. Data were analyzed using one-way analysis of variance and Tukey's test (5%). RESULTS: There were significant differences for all parameters (p = 0.0001). Mean values ± SD and results of the Tukey's test were: Surface wear: GEN - 4.88 (±1.09)a, L - 5.04 ± 0.99)a, FB - 5.32 (±0.93)ab, GEN + L - 5.46 (±1.27)abc, SB + L - 5.78 (±1.12)abc, FB + L - 6.23 (±1.25)bc, SB - 6.35 (±1.11)c, and C - 6.46 (±0.61)c; layer thickness: GEN - 15.2 (±8.63)c, FB - 5.06 (±1.96)a, GEN + L - 13.96 (±7.07)bc, SB + L - 4.24 (±2.68)a, FB + L - 9.03 (±13.02)abc, and SB - 7.49 (±2.80)ab; retention: GEN - 68.89 (±20.62)c, FB - 54.53 (±24.80)abc, GEN + L - 59.90 (±19.79)abc, SB + L - 63.37 (±19.30)bc, FB + L - 42.23 (±17.68) a, and SB - 47.78 (±18.29)ab; microhardness: GEN - 9.27 (±1.75)c; FB - 6.99 (±0.89)b; GEN + L - 6.22 (±0.87)ab; SB + L - 15.48 (±2.51)d; FB + L - 10.67 (±1.58)c; SB - 5.00 (±1.60)a. CONCLUSION: The application of Futurabond U and G-aenial bond on enamel surface, as well as the Nd:YAG laser irradiation alone, was able to reduce the enamel wear. The use of laser after the adhesive systems did not improve their efficacy. CLINICAL SIGNIFICANCE: Erosive/abrasive wear is a prevalent condition in clinical practice affecting many patients. The association of adhesive systems and Nd:YAG laser is of considerable clinical interest because it assesses new treatments to reduce the erosive/abrasive wear that would help dentists in clinical treatment decisions to reduce enamel wear and achieve a successful treatment.


Assuntos
Cimentos Dentários/uso terapêutico , Esmalte Dentário/lesões , Abrasão Dentária/prevenção & controle , Desgaste dos Dentes/prevenção & controle , Animais , Bovinos , Lasers de Estado Sólido/uso terapêutico
8.
Stomatologiia (Mosk) ; 96(3): 14-17, 2017.
Artigo em Russo | MEDLINE | ID: mdl-28617400

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.


Assuntos
Clínicas Odontológicas/estatística & dados numéricos , Abrasão Dentária/terapia , Erosão Dentária/terapia , Adulto , Fatores Etários , Idoso , Documentação , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Aparelhos Ortodônticos , Federação Russa , Abrasão Dentária/prevenção & controle , Abrasão Dentária/reabilitação , Erosão Dentária/prevenção & controle , Erosão Dentária/reabilitação , Remineralização Dentária/métodos , Adulto Jovem
9.
Oral Health Prev Dent ; 15(3): 269-277, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28530007

RESUMO

PURPOSE: To evaluate the effect of CPP-ACPF paste and fluoride toothpastes on enamel subjected to erosion and erosion plus abrasion in vitro. MATERIALS AND METHODS: A total of 220 human enamel blocks were divided into eleven groups (n = 20): CPP-ACPF paste (MPP), potassium nitrate/sodium fluoride toothpaste (PE), sodium fluoride toothpaste (FD), fluoride-free toothpaste (SO) and control (erosion only with no paste or toothpastes; CO) according to the experimental design: erosion or erosion plus abrasion immediately after erosion (ERO+I-ABR) or 30 min after erosion (ERO+30min-ABR). For 5 days, the specimens were subjected to: (1) erosive challenge (EC) (cola drink, 4 x 5 min/day), topical application of the undiluted paste or diluted toothpastes (1:2 w/w) (4 x 1 min/ day) plus 1 h in artificial saliva (AS) between cycles and overnight; or (2) EC plus abrasion (4 x /60 s/day) performed with the diluted toothpastes (no MMP) plus 1 h in AS between cycles and overnight. Erosion depth was quantified through a 3D profilometer. Data were analysed using Kruskal-Wallis, Mann-Whitney and Wilcoxon tests (p = 0.05). RESULTS: CPP-ACPF paste and NaF toothpaste showed lowest enamel wear among groups and reduced tissue loss by 89% in erosion challenge. Abrasion led to higher enamel wear than erosion only (p = 0.030). ERO+30min-ABR had no protective effect when compared to ERO+I-ABR (p > 0.05). CONCLUSION: A high frequency of CPP-ACPF paste application (4x daily) is effective in reducing the effects of erosion. A waiting period before performing toothbrushing does not protect enamel against erosion regardless the composition of the toothpastes.


Assuntos
Caseínas/farmacologia , Esmalte Dentário/efeitos dos fármacos , Fluoretos/farmacologia , Abrasão Dentária/prevenção & controle , Cremes Dentais/farmacologia , Esmalte Dentário/ultraestrutura , Humanos , Imageamento Tridimensional , Técnicas In Vitro , Pomadas
10.
Clin Oral Investig ; 21(1): 463-468, 2017 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-27059993

RESUMO

OBJECTIVE: The objective of this study was to test the effectiveness of resin-based materials against erosive enamel wear under erosive and abrasive challenges by orange juice and tooth brushing. METHODS: Fifty enamel specimens from third molars were assigned to five groups: ICON resin infiltration with no etching (ICON-NE), ICON resin infiltration with 15 % HCl etching (ICON-AE), Seal & Protect sealant (S&P), Tetric EvoFlow (TEF), and control. Erosive lesions were first created on enamel, then treated with resin-based materials. Erosive and abrasive challenges by orange juice and tooth brushing were repeated after treatments. Erosive wear of the treated areas was measured with 3D scanning microscopy, and data were analyzed using ANOVA and paired t tests. RESULTS: Treatments with ICON, S&P, and TEF created a protective material coating of 4.5 ± 1.9 µm, 44.3 ± 8.1 µm, and 84.6 ± 15.7 µm in thickness on the lesion surfaces, respectively. After 15 cycles of erosive and abrasive challenges, enamel or material losses were 21.9 ± 2.3 µm for control, 24.5 ± 4.0 µm for ICON-NE, 24.6 ± 7.4 µm for ICON-AE, 11.2 ± 4.1 µm for S&P, and 3.9 ± 1.9 µm for TEF, respectively. The protective coatings were completely lost in the ICON infiltration groups but remained intact in both the S&P and TEF groups after erosive and abrasive challenges. CONCLUSION: In contrast to a resin sealant and a flowable composite, ICON infiltration resin was not effective in protecting enamel surfaces from erosive and abrasive wear. CLINICAL RELEVANCE: Sealant and flowable composite resin may create protective coatings on eroded enamel surfaces and prevent further tissue loss.


Assuntos
Citrus sinensis , Resinas Compostas/química , Esmalte Dentário/efeitos dos fármacos , Sucos de Frutas e Vegetais , Cimentos de Resina/química , Resinas Sintéticas/química , Abrasão Dentária/prevenção & controle , Desgaste dos Dentes/prevenção & controle , Escovação Dentária , Condicionamento Ácido do Dente , Humanos , Técnicas In Vitro , Dente Serotino
11.
Caries Res ; 51(1): 52-57, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-27992868

RESUMO

Abrasives may counteract the efficacy of anti-erosion toothpastes either due to physical effects or due to interaction with active agents. This study aimed to investigate whether the amount of abrasives is a determinant for the efficacy of Sn2+-containing toothpastes with or without chitosan additive. Enamel samples were eroded (0.50 wt% citric acid, pH 2.5; 6 × 2 min/day) on a shaking desk - 30/min in experiment 1 (E1) and 35/min in experiments 2 (E2) and 3 (E3) - and immersed in toothpaste slurries (2 × 2 min). Half of the samples were additionally brushed (15 s, load 200 g) within the immersion time. The toothpastes contained 0, 5, 10, 15, and 20% silica. In E1 and E2 the active ingredients were F- (700 ppm as amine fluoride, 700 ppm as NaF) and Sn2+ (3,500 ppm as SnCl2); in E3 chitosan (0.5%) was additionally added. The placebo contained 20% silica. Tissue loss was determined profilometrically. In E1, slurries completely inhibited tissue loss; distinct surface deposits occurred. With brushing, tissue loss significantly increased up to an abrasive content of 10%, but decreased significantly with higher amounts; 20% silica revealed similar values as the abrasive-free formulation. In E2, all slurries inhibited tissue loss distinctly irrespective of the amounts of abrasives. With brushing, a similar trend as in E1 was observed but with much less efficacy. The chitosan-containing formulations in E3 were much more effective; similar results as in E1 were found. In conclusion, the amount of abrasives had no effect when toothpastes were applied as slurries, but played an important role with brushing.


Assuntos
Cariostáticos/farmacologia , Quitosana/farmacologia , Fluoretos/farmacologia , Dióxido de Silício/farmacologia , Fluoretos de Estanho/farmacologia , Abrasão Dentária/prevenção & controle , Erosão Dentária/prevenção & controle , Cremes Dentais/farmacologia , Análise de Variância , Cariostáticos/uso terapêutico , Quitosana/uso terapêutico , Ácido Cítrico/farmacologia , Cárie Dentária/prevenção & controle , Esmalte Dentário/efeitos dos fármacos , Relação Dose-Resposta a Droga , Fluoretos/uso terapêutico , Humanos , Dióxido de Silício/uso terapêutico , Estatísticas não Paramétricas , Fluoretos de Estanho/uso terapêutico , Escovação Dentária , Cremes Dentais/uso terapêutico
12.
Bauru; s.n; 2017. 135 p. ilus, tab, graf.
Tese em Português | LILACS, BBO - Odontologia | ID: biblio-879738

RESUMO

O presente trabalho teve como objetivo avaliar em esmalte, a aplicação de materiais resinosos com e sem excesso, quando submetido à erosão de curta duração in vitro (subprojeto 1) e avaliar a resistência desses materiais quando submetidos à erosão e/ou abrasão em estudo prolongado in vitro (subprojeto 2) e in situ (subprojeto 3). O estudo foi desenvolvido com espécimes/blocos preparados a partir de esmalte bovino previamente erodidos (imersão em HCl 0,01 M, pH 2,3 por 30 s), os quais foram aleatorizados entre os grupos e tratados de acordo com as recomendações do fabricante. No subprojeto 1 foram avaliados dois fatores: o tipo de tratamento (controle, selante de fossas e fissuras, sistema adesivo convencional de 3 passos, sistema adesivo autocondicionante e infiltrante) e a condição do material (com/sem remoção de material na superfície de esmalte). Em metade dos espécimes, após a aplicação dos materiais houve a remoção de seu excesso na superfície de esmalte, anteriormente à fotoativação. Após os tratamentos os espécimes foram submetidos à ciclagem erosiva por 5 dias (HCl 0,01 M, pH 2,3, por 2 min e saliva artificial por 2 h, 4 vezes/dia) e os resultados delinearam os demais sobreprojetos. No subprojeto 2 foram avaliados dois fatores: o tipo de tratamento (controle, selante de fossas e fissuras, sistema adesivo convencional de 3 passos e infiltrante) e o tipo de desgaste (erosão, abrasão, erosão/abrasão). Após os tratamentos, os espécimes sem remoção do excesso foram submetidos à ciclagem erosiva (HCl 0,01 M, pH 2,3, por 2 min e saliva artificial por 2 h, 4 vezes/dia), abrasiva (30 movimentos recíprocos, com força de 1,5 N e solução de slurry 1:3, dentifrício fluoretado) e associação de ambas (erosão 4 vezes/dia + 2 vezes/dia de abrasão) durante 30 dias. No subprojeto 3 foram avaliados três fatores: tipo de tratamento (controle, selante de fossas e fissuras, sistema adesivo convencional de 3 passos e infiltrante), o tipo de desgaste (erosão, erosão/abrasão) e o tempo de desafio (5 e 28 dias). Em uma única fase, 21 voluntários usaram um dispositivo palatino contendo os blocos de esmalte tratados sem remoção do excesso (uma fileira correspondia à erosão e a outra a erosão/abrasão, e cada uma continha 2 espécimes por tratamento). Durante 28 dias úteis de desafio, os blocos foram submetidos ex vivo à erosão (HCl 0,01 M, pH 2,3, por 2 min, e saliva humana por 2 h, 4 vezes/dia), e erosão/abrasão (erosão, 4 vezes/dia + 2 vezes/dia de abrasão, com movimentos oscilatórios por 15 s e solução de slurry 1:3, com dentifrício fluoretado), sendo que após os desafios e durante os finais de semana, os aparelhos permaneceram imersos em saliva artificial, totalizando 28 dias de ciclagem. Os resultados foram avaliados por perfilometria e os dados foram submetidos à ANOVA, seguido do teste Tukey (p <0,05). No subprojeto 1, observou-se que todos os materiais sem remoção do excesso formaram uma camada protetora sobre o esmalte, e após o desafio erosivo, permaneceram sobre a superfície inibindo a sua perda. Nos grupos onde o excesso de material foi removido, houve perda de esmalte no selante, adesivo convencional e infiltrante já após o tratamento, e todos os materiais nos quais o excesso foi removido houve perda de esmalte estatisticamente semelhante ao grupo controle, com exceção do selante, que promoveu menor perda de esmalte. No subprojeto 2, houve diferença na espessura de material após o tratamento, sendo que o adesivo foi o que apresentou maior espessura, seguido do selante e infiltrante. Após a fase in vitro, observou-se que a erosão/abrasão resultou em perda de esmalte significativamente maior que a erosão e esta, por sua vez, maior que a abrasão. Todos os materiais, independente do tipo de desgaste, se mantiveram após os 30 dias de desafio, porém, o adesivo foi o que sofreu maior perda em espessura, diferindo estatisticamente do selante e infiltrante. No subprojeto 3, houve diferença na espessura de material após o tratamento, sendo que o infiltrante foi o grupo que apresentou maior espessura, seguido do selante e depois do adesivo. Após a fase in situ, não houve diferença entre erosão e erosão/abrasão, e ao comparar os materiais, com 5 e 28 dias de desafio, não foi observada mudança significativa na espessura de material. A perda de esmalte foi superior com 28 dias de desafio. Considerando os resultados, conclui-se que os materiais resinosos aplicados sobre o esmalte erodido foram efetivos na inibição da perda de esmalte, quando submetidos a desafios erosivos associados ou não a abrasão in vitro e in situ.(AU)


This study aimed to evaluate the application of resin-based materials on enamel with and without removal of the excess subjected to short erosion in vitro (subproject 1) and to evaluate the resistance of these materials when subjected to erosion and/or abrasion in a prolonged study in vitro (subproject 2) and in situ (subproject 3). Specimens/blocks of bovine enamel previously eroded (immersion in 0.01 M HCl, pH 2.3 for 30 s) were randomized among groups and treated following the manufacturer's instructions. On subproject 1 there were 2 factors under study, type of treatment (control, sealant, self-etching adhesive, 3-step adhesive and infiltrant) and materials condition (with/without material excess removal). After materials application, in half of the specimens, the excess was removed, prior to polymerization. The specimens were subjected to erosive cycling for 5 days (0.01 M HCl, pH 2.3 for 2 min and artificial saliva for 2 h, 4 times/day). On the subproject 2, there were 2 factors under study, type of treatment (control, sealant, adhesive and infiltrant) and type of wear (erosion, abrasion, erosion/abrasion). After the treatments, the specimens were subjected to erosive cycling (0.01 M HCl, pH 2.3 for 2 min and artificial saliva for 2 h, 4 times/day), abrasive (30 reciprocal movements, force 1.5 N and slurry with fluoride dentifrice) and combination of both (erosion, 4 times/day + abrasion 2 times/day) for 30 days. On subproject 3, there were 3 factors under study, types of treatment (control, sealant, adhesive and infiltrant), type of wear (erosion, erosion/abrasion) and challenge time (5 and 28 days). In a single phase, 21 volunteers used a palatal appliance (one row corresponded to erosion and the other to erosion/abrasion, 2 specimens per treatment in each row). During 20 days of challenge, the blocks were subjected to erosion (0.01 M HCl, pH 2.3 for 2 min, and human saliva for 2 h, 4 times/day), and erosion/abrasion (erosion 4 times/day + abrasion 2 times/day with oscillatory motions for 15 s and slurry with fluoridated dentifrice). After the challenges and during the weekends, the appliance was kept immersed in artificial saliva. The results were evaluated by profilometry and the data were analyzed by ANOVA, followed by the Tukeys test (p<0.05). On subproject 1, it was observed that all materials without excess removal formed a layer over enamel. After the erosive challenge this layer remained inhibiting enamel loss. Sealant, 3- steps adhesive and infiltrant with material excess removal showed enamel loss after treatment. All materials with excess removal, showed loss of enamel statistically similar to the control group, except for the sealant, that promoted minor enamel loss. On subproject 2, after the treatment, materials thickness showed significance differences. The adhesive had the highest thickness followed by the sealant and infiltrant. There was no significant difference between sealant and infiltrant. After the erosive challenge in vitro it was observed that erosion/abrasion resulted in significantly higher enamel loss than erosion, which was higher than abrasion. All materials, regardless wear conditions, were maintained after the 30 days of challenge, however, the adhesive showed greatest material thickness loss, statistically differing from the sealant and infiltrant. On subproject 3, the application of resin-based materials did not cause superficial enamel loss. After the erosive challenge, there was no difference between the conditions ERO and ERO + ABR (p=0.869). All materials promoted protection against erosion compared to control group (p=0.001). The infiltrant group showed a thicker layer of material above enamel compared to the other materials (p =0.001). Based on results, it is concluded that the resin-based materials applied onto enamel were effective in inhibiting enamel loss subjected to erosive challenges associated or not with abrasion in vitro and in situ.(AU)


Assuntos
Humanos , Animais , Bovinos , Esmalte Dentário/química , Esmalte Dentário/efeitos dos fármacos , Resinas Sintéticas/química , Abrasão Dentária/prevenção & controle , Erosão Dentária/prevenção & controle , Testes de Dureza , Valores de Referência , Saliva/química , Fatores de Tempo
13.
Braz Oral Res ; 30(1)2016 Jun 14.
Artigo em Inglês | MEDLINE | ID: mdl-27305512

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.


Assuntos
Esmalte Dentário/efeitos dos fármacos , Dentina/efeitos dos fármacos , Ebenaceae/química , Abrasão Dentária/prevenção & controle , Erosão Dentária/prevenção & controle , Adolescente , Adulto , Análise de Variância , Bebidas Gaseificadas , Géis , Testes de Dureza , Humanos , Reprodutibilidade dos Testes , Salivação , Estatísticas não Paramétricas , Propriedades de Superfície/efeitos dos fármacos , Fatores de Tempo , Resultado do Tratamento , Adulto Jovem
14.
Caries Res ; 50(3): 337-45, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27246229

RESUMO

The present study evaluated the effect of chitosans with different viscosities, dissolved in an AmF/SnCl2 solution, against erosion or erosion/abrasion. A total of 192 specimens were assigned to 2 × 6 groups (n = 16 specimens each): negative control, 4 chitosan solutions (groups Ch50, Ch500, Ch1000, and Ch2000, with viscosity of 50, 500, 1,000, or 2,000 mPas, respectively, 0.5% chitosan, 500 ppm F-, 800 ppm Sn2+, pH 4.4), and positive control (500 ppm F-, 800 ppm Sn2+, pH 4.3). One half of the groups was demineralized (experiment 1, E1; 10 days, 6 × 2 min/day, 0.5% citric acid, pH 2.8) and exposed to solutions (2 × 2 min/day); the other half was additionally brushed (15 s, 200 g) with non-fluoridated toothpaste before solution immersion (experiment 2, E2). Treatment effects were investigated by profilometry, energy-dispersive X-ray spectroscopy and scanning electron microscopy (SEM). In E1, all the chitosan-containing solutions reduced enamel loss by 77-80%, to the same extent as the positive control, except for Ch2000 (p ≤ 0.05), which completely inhibited tissue loss by the formation of precipitates. In E2, Ch50 and Ch500 showed best performance, with approximately 60% reduction of tissue loss compared to the negative control group (p ≤ 0.05 compared to other groups). SEM analysis showed differences between negative control and the other groups but only minor differences amongst the groups treated with active agents. In both E1 and E2, treatment with active agents resulted in surface enrichment of carbon and tin compared to negative control (p ≤ 0.001); brushing removed parts of carbon and tin (p ≤ 0.001). Chitosan shows different properties under erosive and erosive/abrasive conditions. Under erosive conditions high viscosity might be helpful, whereas lower viscosity seems to be more effective in cases of chemo-mechanical challenges.


Assuntos
Quitosana/farmacologia , Esmalte Dentário/efeitos dos fármacos , Abrasão Dentária/prevenção & controle , Desmineralização do Dente/prevenção & controle , Erosão Dentária/prevenção & controle , Ácido Cítrico/efeitos adversos , Humanos , Técnicas In Vitro , Microscopia Eletrônica de Varredura , Fluoreto de Sódio/farmacologia , Espectrometria por Raios X , Fluoretos de Estanho/farmacologia , Abrasão Dentária/diagnóstico por imagem , Desmineralização do Dente/diagnóstico por imagem , Erosão Dentária/diagnóstico por imagem , Escovação Dentária/efeitos adversos , Cremes Dentais/farmacologia
15.
Caries Res ; 50(2): 170-9, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27115419

RESUMO

There is no standard for testing anti-erosive/anti-abrasive agents, making the assessment and comparison of study results difficult. Factors which are varied in study designs are amongst others the erosive medium regarding concentration and pH or movement type of acid. The present study therefore investigated the impact of these factors on dimension of tissue loss and on efficacy of active agents used as anti-erosive/anti-abrasive therapeutics. In 8 experiments, consisting of 8 groups each (n = 20 each), resulting in a total of 64 groups, enamel specimens were demineralised (10 days, 6 × 2 min/day) using different acids (1, 0.5 and 0.3% citric acid at native pH 2.3, 2.5 and 2.8, respectively, and 0.3% citric acid adjusted to pH 3.6) with two different movement types (jerky or smooth). Specimens were immersed (2 × 2 min/day) in slurries of 1,450 ppm F- toothpaste (NaF), 1,450 ppm F- and 3,436 ppm Sn2+ toothpaste (NaF/SnF2), 970 ppm F- and 3,000 ppm Sn2+ gel (SnF2) or placebo, or were additionally brushed during immersion (15 s, 200 g). All groups were in between stored in a mineral salt solution. Tissue loss was determined profilometrically. Movement type, pH and concentration of acid had a substantial impact on study outcome. The combination of jerky movement and concentrated acid masked, to some extent, differences between erosive and erosive-abrasive tissue loss. The acid at low concentration (0.3%), independent of pH, was too mild to produce any tissue loss. The model with the best ability to demonstrate effects of abrasive impacts and active agents used the 1% acid concentration combined with smooth acid movements.


Assuntos
Fluoreto de Sódio/uso terapêutico , Fluoretos de Estanho/uso terapêutico , Abrasão Dentária/prevenção & controle , Erosão Dentária/prevenção & controle , Ácido Cítrico/farmacologia , Esmalte Dentário/patologia , Humanos , Concentração de Íons de Hidrogênio , Imagem Óptica , Projetos de Pesquisa , Fluoreto de Sódio/farmacologia , Estatísticas não Paramétricas , Fluoretos de Estanho/farmacologia , Abrasão Dentária/induzido quimicamente , Abrasão Dentária/terapia , Desmineralização do Dente/prevenção & controle , Erosão Dentária/induzido quimicamente , Erosão Dentária/terapia , Escovação Dentária , Cremes Dentais/farmacologia , Cremes Dentais/uso terapêutico , Resultado do Tratamento
16.
Caries Res ; 50(2): 104-10, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26930495

RESUMO

This study evaluated the influence of toothbrushing on the antierosive effect of solutions containing sodium fluoride (225 ppm/F), stannous chloride (800 ppm/Sn), sodium linear polyphosphate (2%/LPP), and their combinations, and deionized water as negative control (C). Solutions were tested in a 5-day erosion-remineralization-abrasion cycling model, using enamel and dentin specimens (n = 8). Erosion was performed 6 times/day for 5 min, exposure to the test solutions 3 times/day for 2min, and toothbrushing (or not) with toothpaste slurry 2 times/day for 2 min (45 strokes). Surface loss (SL) was determined by noncontact profilometry. Data were analyzed using three-way ANOVA (α = 0.05). Brushing caused more SL than no brushing for enamel (mean ± SD, in micrometers: 52.7 ± 6.6 and 33.0 ± 4.5, respectively), but not for dentin (28.2 ± 1.9 and 26.6 ± 1.8, respectively). For enamel without brushing, F+LPP+Sn showed the lowest SL (23.8 ± 3.4), followed by F+Sn (30.6 ± 4.9) and F+LPP (31.7 ± 1.7), which did not differ from each other. No differences were found between the other groups and C (37.8 ± 2.1). When brushing, F+LPP+Sn exhibited the lowest SL (36.7 ± 2.4), not differing from F+LPP (39.1 ± 1.8). F, F+Sn and LPP+Sn were similar (46.7 ± 2.9, 42.1 ± 2.8 and 45.3 ± 4.6, respectively) and better than C (52.7 ± 4.3). Sn (55.0 ± 2.4) and LPP (51.0 ± 4.3) did not differ from C. For dentin, neither groups differed from C, regardless of brushing. In conclusion, toothbrushing did not affect the antierosive effect of F+Sn, F+LPP and F+LPP+Sn on enamel, although overall it led to more erosion than nonbrushing. F and LPP+Sn showed a protective effect only under brushing conditions, whereas Sn and LPP did not exhibit any protection. For dentin, neither toothbrushing nor the test solutions influenced the development of erosion.


Assuntos
Cariostáticos/farmacologia , Esmalte Dentário/efeitos dos fármacos , Dentina/efeitos dos fármacos , Fosfatos/farmacologia , Fluoreto de Sódio/farmacologia , Compostos de Estanho/farmacologia , Erosão Dentária/prevenção & controle , Escovação Dentária/efeitos adversos , Animais , Bovinos , Sinergismo Farmacológico , Humanos , Técnicas In Vitro , Saliva/fisiologia , Abrasão Dentária/etiologia , Abrasão Dentária/prevenção & controle , Erosão Dentária/etiologia , Remineralização Dentária
17.
J Appl Oral Sci ; 24(1): 61-6, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27008258

RESUMO

UNLABELLED: The use of gels and mouthrinses with MMP inhibitors (chlorhexidine, and green tea extract) was shown to prevent erosive wear. The aim of this study was to analyze the protective effect of toothpastes containing MMP inhibitors on dentine loss induced by erosion in vitro. MATERIAL AND METHODS: Five groups each containing 12 specimens of human root dentine were prepared. The specimens were subjected to 1 min erosion by immersion in a cola drink, 4 times a day, for 5 d. Each day, after the first and last erosive challenges, the specimens were brushed for 15 s with a slurry of dentifrice and water (1:3) containing placebo, 1,100 ppm fluoride, 0.61% green tea extract, 0.12% chlorhexidine or 0.004% chlorhexidine (commercial toothpaste). Between the acid challenges, the specimens were stored in artificial saliva with remineralizing potential until the next treatment. Dentine loss was determined using profilometry. Data were analyzed using one-way ANOVA after log transform (p<0.05). RESULTS: The mean wear values (µm) were as follows: placebo 1.83±0.53; 0.61% green tea extract 1.00±0.21; fluoride 1.27±0.43; 0.12% chlorhexidine 1.19±0.30; and 0.004% chlorhexidine 1.22±0.46. There was a significant difference in wear between placebo and all the treatment toothpastes, which did not differ from each other. CONCLUSION: The results suggest that toothpastes containing MMP inhibitors are as effective as those based on NaF in preventing dentine erosion and abrasion.


Assuntos
Dentina/efeitos dos fármacos , Inibidores de Metaloproteinases de Matriz/química , Abrasão Dentária/prevenção & controle , Erosão Dentária/prevenção & controle , Cremes Dentais/química , Análise de Variância , Bebidas Gaseificadas , Clorexidina/química , Humanos , Teste de Materiais , Distribuição Aleatória , Saliva Artificial/química , Propriedades de Superfície/efeitos dos fármacos , Fatores de Tempo , Escovação Dentária
18.
J. appl. oral sci ; 24(1): 61-66, Jan.-Feb. 2016. graf
Artigo em Inglês | LILACS | ID: lil-777356

RESUMO

ABSTRACT The use of gels and mouthrinses with MMP inhibitors (chlorhexidine, and green tea extract) was shown to prevent erosive wear. The aim of this study was to analyze the protective effect of toothpastes containing MMP inhibitors on dentine loss induced by erosion in vitro. Material and Methods Five groups each containing 12 specimens of human root dentine were prepared. The specimens were subjected to 1 min erosion by immersion in a cola drink, 4 times a day, for 5 d. Each day, after the first and last erosive challenges, the specimens were brushed for 15 s with a slurry of dentifrice and water (1:3) containing placebo, 1,100 ppm fluoride, 0.61% green tea extract, 0.12% chlorhexidine or 0.004% chlorhexidine (commercial toothpaste). Between the acid challenges, the specimens were stored in artificial saliva with remineralizing potential until the next treatment. Dentine loss was determined using profilometry. Data were analyzed using one-way ANOVA after log transform (p<0.05). Results The mean wear values (μm) were as follows: placebo 1.83±0.53; 0.61% green tea extract 1.00±0.21; fluoride 1.27±0.43; 0.12% chlorhexidine 1.19±0.30; and 0.004% chlorhexidine 1.22±0.46. There was a significant difference in wear between placebo and all the treatment toothpastes, which did not differ from each other. Conclusion The results suggest that toothpastes containing MMP inhibitors are as effective as those based on NaF in preventing dentine erosion and abrasion.


Assuntos
Humanos , Abrasão Dentária/prevenção & controle , Erosão Dentária/prevenção & controle , Cremes Dentais/química , Dentina/efeitos dos fármacos , Inibidores de Metaloproteinases de Matriz/química , Saliva Artificial/química , Propriedades de Superfície/efeitos dos fármacos , Fatores de Tempo , Escovação Dentária , Teste de Materiais , Bebidas Gaseificadas , Distribuição Aleatória , Clorexidina/química , Análise de Variância
19.
J Oral Rehabil ; 43(1): 69-80, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26333037

RESUMO

Tooth wear is a multifactorial condition, leading to the loss of dental hard tissues, viz. enamel and dentine. Tooth wear can be divided into the subtypes mechanical wear (attrition and abrasion) and chemical wear (erosion). Because of its multifactorial aetiology, tooth wear can manifest itself in many different representations, and therefore, it can be difficult to diagnose and manage the condition. A systematic approach is a sine qua non. In the below-described tooth wear evaluation system (TWES), all necessary tools for a clinical guideline are present in different modules. This allows the dental clinician, in a general practitioner setting as well as in a referral practice setting, to perform a state-of-the-art diagnostic process. To avoid the risk of a too cumbersome usage, the dental clinician can select only those modules that are appropriate for a given setting. The modules match with each other, which is indispensable and essential when different modules of the TWES are compared. With the TWES, it is possible to recognise the problem (qualifying), to grade its severity (quantifying), to diagnose the likely causes and to monitor (the progress of) the condition. In addition, a proposal for the classification of tooth wear is made. Further, it is possible to determine when to start a treatment, to make the decision which kind of treatment to apply and to estimate the level of difficulty of a restorative treatment.


Assuntos
Higiene Bucal/métodos , Abrasão Dentária/patologia , Atrito Dentário/patologia , Erosão Dentária/patologia , Dentição , Comportamento Alimentar , Humanos , Anamnese , Guias de Prática Clínica como Assunto , Fatores de Risco , Índice de Gravidade de Doença , Abrasão Dentária/etiologia , Abrasão Dentária/prevenção & controle , Atrito Dentário/etiologia , Atrito Dentário/prevenção & controle , Erosão Dentária/etiologia , Erosão Dentária/prevenção & controle
20.
J Prosthet Dent ; 115(3): 350-5, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-26553254

RESUMO

STATEMENT OF PROBLEM: Contemporary pressable and computer-aided design/manufacturing (CAD/CAM) ceramics exhibit good mechanical and esthetic properties. Their wear resistance compared with human enamel and traditional gold based alloys needs to be better investigated. PURPOSE: The purpose of this in vitro study was to compare the 2-body wear resistance of human enamel, gold alloy, and 5 different dental ceramics, including a recently introduced zirconia-reinforced lithium silicate ceramic (Celtra Duo). MATERIAL AND METHODS: Cylindrical specimens were fabricated from a Type III gold alloy (Aurocast8), 2 hot pressed ceramics (Imagine PressX, IPS e.max Press), 2 CAD/CAM ceramics (IPS e.max CAD, Celtra Duo), and a CAD/CAM feldspathic porcelain (Vitablocs Mark II) (n=10). Celtra Duo was tested both soon after grinding and after a subsequent glaze firing cycle. Ten flat human enamel specimens were used as the control group. All specimens were subjected to a 2-body wear test in a dual axis mastication simulator for 120000 loading cycles against yttria stabilized tetragonal zirconia polycrystal cusps. The wear resistance was analyzed by measuring the vertical substance loss (mm) and the volume loss (mm(3)). Antagonist wear (mm) was also recorded. Data were statistically analyzed with 1-way ANOVA tests (α=.05). RESULTS: The wear depth (0.223 mm) of gold alloy was the closest to that of human enamel (0.217 mm), with no significant difference (P>.05). The greatest wear was recorded on the milled Celtra Duo (wear depth=0.320 mm), which appeared significantly less wear resistant than gold alloy or human enamel (P<.05). CONCLUSIONS: The milled and not glazed Celtra Duo showed a small but significantly increased wear depth compared with Aurocast8 and human enamel. Wear depth and volumetric loss for the glaze-fired Celtra Duo and for the other tested ceramics did not statistically differ in comparison with the human enamel.


Assuntos
Cerâmica/química , Esmalte Dentário/química , Porcelana Dentária/química , Desgaste de Restauração Dentária , Desenho Assistido por Computador , Humanos , Teste de Materiais , Propriedades de Superfície , Abrasão Dentária/etiologia , Abrasão Dentária/prevenção & controle , Desgaste dos Dentes/etiologia , Desgaste dos Dentes/prevenção & controle
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