Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 3.306
Filtrar
1.
Georgian Med News ; (313): 48-51, 2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-34103429

RESUMO

The aim - to study the efficiency of correction of hard tooth tissues discoloration. The study was conducted on 135 patients with tooth discoloration. Clinical - complex examination of patients with determination of hard tooth tissues color (Vіta scale), indexes of individual oral hygiene, intensity and prevalence of gums inflammation for the study of efficiency of the applied medical and preventive complexes of correction of hard tooth tissues discoloration depending on a clinical situation; statistical - for determination of authenticity of differences of the results. Patients of O-1 group, who used abrasive bleaching toothpastes, during the initial examination, had a poor oral hygiene. In patients O-2 group, who used peroxide containing bleaching toothpastes, during examination of 420 teeth hard tooth tissues discoloration were noted in 187 (44.53%) patients teeth. Patients O-3 group, who used enzyme containing bleaching toothpastes, during the initial examination had hard tooth tissues discoloration in 198 (47.14%) tooth. The proposed algorithms for whitening with usage of oral hygiene facilities tested positive. However, obtained in the long-term observation results showed that the most pronounced bleaching effect with enzyme containing toothpaste. Studies had shown the most pronounced efficacy of enzyme containing whitening toothpaste in the complex treatment and prevention of correction of hard tooth tissues discoloration compared to other whitening toothpastes.


Assuntos
Clareadores , Clareamento Dental , Descoloração de Dente , Dente , Humanos , Cremes Dentais
2.
J Clin Pediatr Dent ; 45(2): 112-116, 2021 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-33951168

RESUMO

OBJECTIVE: Calcium silicate-based cements (CSCs) may lead to coronal staining in young permanent teeth over the time. The purpose of this study was to evaluate and compare the long-term tooth discoloration induced by different CSCs. STUDY DESIGN: Ninety freshly-extracted human molars were assigned randomly into 6 groups (n=15/group) according to the CSC used as a pulpotomy material: ProRoot MTA, MTA Angelus, NeoMTA, EndoSequence Putty, Biodentine and Negative control (No cement). The color was assessed at baseline, and thereafter at 3, 6, 12 and 24 months by using both a spectrophotometer and digital images taken with and without a cross-polarizing filter. The time-dependent changes in color (ΔE) were compared within and among groups using Analysis of Variance. RESULTS: Angelus MTA and ProRooT MTA showed severe coronal discoloration (p>0.05) starting at 3 months. ΔE values of NeoMTA, EndoSequence Bioceramic Putty and Biodentine were below the perceptibility threshold, with Biodentine showing greater ΔE values than NeoMTA and EndoSequence Putty in the absence of statistical significance (p>0.05). CONCLUSIONS: Discoloration elicited by CSCs may develop soon after placement, and continue to increase for up to two years. Angelus MTA and ProRooT MTA cannot be recommended for vital pulp therapies in the esthetic zone of young individuals.


Assuntos
Descoloração de Dente , Dente , Compostos de Alumínio/efeitos adversos , Compostos de Cálcio/efeitos adversos , Cimentos Dentários/efeitos adversos , Combinação de Medicamentos , Humanos , Óxidos/efeitos adversos , Pulpotomia , Silicatos/efeitos adversos , Descoloração de Dente/induzido quimicamente
3.
Braz Dent J ; 32(1): 53-58, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33914003

RESUMO

The endodontic revascularization may be an alternative treatment for necrotic immature teeth, however, several treatment steps may cause tooth discoloration. This study evaluated the use of three calcium silicate-based cements with different radiopacifying agents on the color alteration (∆E) of extracted premolars after simulation of revascularization. Forty single rooted extracted premolars were shaped with #1-6 gates Glidden drills, rinsed with sodium hypochlorite, and filled with fresh human blood. Three calcium silicate-based cements with different radiopacifying agents (bismuth oxide - CSBi, calcium tungstate - CSW, and zirconium oxide - CSZr) were applied over the blood clot (n=10). The control group received the application of a temporary zinc oxide-based cement (TFZn) (n=10). ∆E was measured with a spectrophotometer, using the L*a*b* color system of the International Commission on Illumination (CIELab), in different times: prior to the preparation of the access cavity (t0); right after treatment (t1); and after one (t2), two (t3), three (t4) and four (t5) months. The tooth site for color evaluation was standardized by silicon matrix, the color reading was performed 3 times per tooth, and the teeth were stored in 37º water between evaluations. ∆E, whiteness (WID index) and yellowness (b*) were evaluated. Data were subjected to one-way ANOVA and repeated measures ANOVA, followed by Tukey's post hoc test (α=0.05). All groups were similar in ∆E1 (t0-t1). The ∆E was the lowest and constant in the control group. In all evaluation times, CSBi presented the highest ∆E (p<0.01). CSW and CSZr were similar in all evaluated times and presented intermediate ∆E values. WID index from CSBi and CSW presented more distancing from 'white' reference. CSBi presented the greatest decrease in yellowness (b* value). The cement containing bismuth oxide presented the highest color alteration values. All tested calcium silicate-based cements presented clinically perceptible discoloration. Calcium tungstate and zirconium oxide may be used as alternative radiopacifiers to decrease tooth discoloration after endodontic tooth revascularization.


Assuntos
Materiais Restauradores do Canal Radicular , Descoloração de Dente , Compostos de Alumínio , Compostos de Cálcio , Cimentos Dentários , Combinação de Medicamentos , Humanos , Óxidos , Silicatos
4.
Pan Afr Med J ; 38: 38, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33777306

RESUMO

Introduction: patients´ satisfaction with their dental appearance and tooth colour is often influenced by certain factors which need to be addressed periodically among different populations. Methods: a self-administered questionnaire consisting of sociodemographic data, questions on patients´ satisfaction with tooth colour, perceived malalignment of teeth, non-aesthetic anterior tooth-coloured restoration and presence of tooth fracture were distributed. Data collected was analysed using Statistical Package for Social Sciences (IBM, SPSS version 20). Chi square was used to test the statistical differences at a significance of p> 0.05. Results: a total of 410 patients (M=147, F=263) participated in the study. About 73% had tertiary education while 36.3% were within the modified ISCO-08 Group 2. The respondents that were satisfied with the general dental appearance and tooth shade were 66.3% and 63.5% respectively. More males (65.1%) than females (62.7%) were satisfied with tooth colour while more females (69.1%) were satisfied with dental appearance. The older age group were more satisfied with dental appearance and tooth colour. Awareness of tooth whitening (Over 80%) and the desire to undergo tooth whitening was more among the post-secondary individuals. More of dental patients (73.1%) than medical (59.2%) were satisfied with teeth appearance (p=0.003). Conclusion: patients are increasingly aware of their dental appearance/tooth colour and the need to improve it with tooth bleaching and/or orthodontic treatment. Female were more dissatisfied with their tooth colour but more satisfied with their dental appearance than the male. Older people were more satisfied with their dental appearance and tooth colour compared to younger age group.


Assuntos
Satisfação Pessoal , Clareamento Dental/psicologia , Descoloração de Dente/psicologia , Dente/patologia , Adulto , Fatores Etários , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Nigéria , Ortodontia Corretiva/psicologia , Percepção , Fatores Sexuais , Inquéritos e Questionários , Adulto Jovem
5.
Rev. ADM ; 78(2): 73-79, mar.-abr. 2021. ilus, tab
Artigo em Espanhol | LILACS | ID: biblio-1247336

RESUMO

El color es un efecto visual de los rayos de luz reflejándose y su concepto es complejo por ser una sensación que se percibe y por las características electromagnéticas. Los dientes varían espacialmente porque son curvados, tienen prolongaciones relativamente pequeñas y vistas en contra de una variable de fondo no uniforme así como típicamente una iluminación no estandarizada, por lo cual difieren en relación con su colorimetría, por lo que el estudio del color es fundamental en la odontología. En la actualidad hay métodos para evaluar el color, desde una simple revisión visual hasta instrumentos como el colorímetro y los espectrofotómetros, los cuales son aparatos utilizados en la medida del color de un objeto a través de su longitud de onda reflejada. Una pigmentación dental se produce por varios factores, ya sean intrínsecos y extrínsecos, estas pigmentaciones son factores importantes tanto en la estética como en el aspecto físico, por lo que es importante poder evaluar la estabilidad de los dientes naturales ante diferentes sustancias que podrían modificar su color natural. En este estudio nos dimos a la tarea de evaluar el cambio de color de dientes naturales ante diferentes bebidas, se eligieron tres bebidas pigmentantes y de uso común: café, vino tinto y jugo de arándano; se utilizaron 10 dientes unirradiculares del mismo color previamente analizados con el espectrofotómetro. Un diente fue la muestra control y los nueve restantes se sumergieron en frascos separados con 10 mL de las tres bebidas elegidas. Realizando la evaluación de color a los 15, 30 y 90 días con ayuda del espectrofotómetro, pudimos observar que el diente sumergido en café no tuvo variación durante los primeros 15 días y el cambio más notable de color fue hasta los 90 días a diferencia de las muestras sumergidas en vino y jugo de arándano cuya variación máxima de color se presentó en 15 días respectivamente (AU)


Color is a visual effect of light rays reflecting and its concept is complex, for being a sensation that is perceived and for the electromagnetic characteristics. Teeth vary spatially because they are curved, have relatively small extensions, and are viewed against a non-uniform background variable as well as typically non-standardized illumination, which is why they differ in relation to their colorimetry. So the study of color is fundamental in dentistry. Currently, there are methods to evaluate color, from a simple visual check to instruments such as the colorimeter and spectrophotometers, which are devices used to measure the color of an object through its reflected wavelength. A dental pigmentation is produced by various factors, both intrinsic and extrinsic, these pigmentations are currently important factors in both aesthetics and physical appearance, so it is important to be able to evaluate the stability of natural teeth against different substances that could modify its natural color. In this study, we undertook the task of evaluating the change in the color of natural teeth when faced with different beverages. Three pigment and commonly used beverages were chosen: coffee, red wine and cranberry juice; 10 single-rooted teeth of the same color previously analyzed with the spectrophotometer were used. One tooth was the control sample and the remaining nine were immersed in separate bottles with 10 mL of the three chosen drinks. Carrying out the color evaluation at 15, 30 and 90 days with the help of the spectrophotometer, we could see that the tooth immersed in coffee did not change during the first 15 days and the most notable change in color was up to 90 days, unlike the samples immersed in wine and cranberry juice whose maximum color variation was presented in 15 days respectively (AU)


Assuntos
Humanos , Descoloração de Dente , Bebidas , Cor , Colorimetria , Estética Dentária , Espectrofotometria/métodos , Vinho , Técnicas In Vitro , Epidemiologia Descritiva , Análise Estatística , Café , Sucos , Luz
6.
BMC Oral Health ; 21(1): 113, 2021 03 11.
Artigo em Inglês | MEDLINE | ID: mdl-33706750

RESUMO

OBJECTIVE: To assess the effects for controlling extrinsic tooth stain of a whitening toothpaste containing 10% high cleaning silica, 0.5% sodium phytate and 0.5% sodium pyrophosphate, in comparison with a negative control toothpaste. METHODS: A total of 86 adults who met with the inclusion and exclusion criteria were invited to take part in the study. They were distributed into test and control groups randomly. At baseline, 4 weeks and 8 weeks, the same examiner provided the clinical examinations, including evaluations of oral soft and hard tissues and measurements of tooth stain of the anterior teeth using the Lobene Stain Index. Adverse events and any changes in general health conditions of the patients were monitored. RESULTS: When the study was completed, comparisons between patients in test and control groups yielded statistically significant differences in Lobene stain adjusted mean area score [0.83 (0.05) vs. 1.13 (0.05)], Lobene stain adjusted mean intensity score [0.99 (0.06) vs. 1.32 (0.06)] and Lobene stain adjusted mean composite score [1.45 (0.13) vs. 2.50 (0.13)] (All, P < 0.001). Patients in the test group exhibited reductions of 26.55%, 25% and 42%, respectively in Lobene stain area, intensity and composite scores, relative to patients in the control group. Comparisons within groups showed that all three Lobene scores at 8 weeks in both groups were lower than those at baseline (All, P < 0.001). CONCLUSION: This study demonstrates that 8-week use of a toothpaste containing 10% high cleaning silica, 0.5% sodium phytate and 0.5% sodium pyrophosphate can effectively reduce extrinsic tooth stain. Trial registration NCT04238429 (before enrollment of the first participant). Data register: March 4, 2018.


Assuntos
Dentifrícios , Clareamento Dental , Descoloração de Dente , Adulto , Difosfatos , Humanos , Ácido Fítico/uso terapêutico , Dióxido de Silício , Fluoreto de Sódio/uso terapêutico , Descoloração de Dente/tratamento farmacológico , Cremes Dentais/uso terapêutico , Resultado do Tratamento
7.
J Formos Med Assoc ; 120(1 Pt 2): 476-482, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-32600866

RESUMO

BACKGROUND/PURPOSE: Mineral trioxide aggregate (MTA) was widely used in endodontic therapy as bioceramic material. Although MTA has high biocompatibility, it may lead to tooth discoloration. The aim of this study was to investigate the discoloration of two different bioceramic materials and the effects of internal bleaching. METHODS: Thirty single-canal mandibular premolars were extracted and randomly assigned to three groups (n = 10), white ProRoot® MTA, SavDen® MTA and a control group. Endodontic access opening, cleaning and shaping were performed, then the teeth were obturated using the two bioceramic materials. Tooth color was recorded at baseline, day 1, and 1, 2, 4, 6, 8, 12, 16, and 24 weeks after treatment. At the end of 24 weeks, sodium perborate was used to perform internal bleaching. Tooth color was recorded at 1, 2, and 6 weeks subsequently. Teeth were measured using a DeguDent® spectrophotometer, and data were transformed into Commission Internationale de l'Eclairage (CIE) L∗a∗b∗ system. RESULTS: Teeth treated with white ProRoot® MTA showed significant color change and decrease in L∗ value. Internal bleaching leaded to decrease of the ΔE∗ value for all three groups and increase in the L∗ value. There was no difference in tooth discoloration between SavDen® MTA and the control group after obturation and internal bleaching. CONCLUSION: In terms of visual perception, white ProRoot® MTA tends to cause black and blue discoloration. SavDen® MTA, formulated with calcium lactate gluconate, could be used to reduce tooth discoloration in endodontic treatment.


Assuntos
Materiais Restauradores do Canal Radicular , Descoloração de Dente , Compostos de Alumínio/efeitos adversos , Clareadores , Compostos de Cálcio/efeitos adversos , Combinação de Medicamentos , Humanos , Óxidos/efeitos adversos , Materiais Restauradores do Canal Radicular/efeitos adversos , Silicatos/efeitos adversos , Descoloração de Dente/induzido quimicamente
8.
J Dent ; 105: 103559, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33346061

RESUMO

OBJECTIVE: To evaluate whether a blue covarine containing silica-based toothpaste promotes a whitening effect immediately after tooth brushing. METHODS: A triple-blind, parallel group, randomized design was used to compare the tooth color before and after brushing. Two silica-based toothpastes were chosen, one of them containing blue covarine (BCT) and the other one without pigment to serve as control (CT). Tooth color was measured using a spectrophotometer and expressed as CIEDE 2000 ΔE, CIELAB values, WIO index, WID index and VITA scale tooth shade. In addition, the participants' satisfaction with and perception of their own tooth color were registered using an aesthetic numeric analogue scale. RESULTS: No significant changes in color components or dimensions measured using CIEDE 2000 ΔE (CT: mean = 1.3, 95% CI 0.8, 1.7; BCT: mean = 1.6, 95% CI 1.2, 2.1), WIO, WID, VITA scale or CIELAB values were detected for the CT and BCT groups, comparing the results before and after brushing. Likewise, the participants' satisfaction with the treatment results (P = 0.31) and the participants' evaluation of tooth color (P = 0.71) did not differ significantly between groups. CONCLUSION: After a single application, no significant improvement in tooth whiteness by the presence of blue covarine in a silica-based toothpaste was detected in color dimensions or by assessing the participants' satisfaction and perception. CLINICAL SIGNIFICANCE: The present study does not show a clinically relevant increase in tooth whiteness after a single brushing with a blue covarine containing toothpaste, nor could the study participants observe a difference between treatment with blue covarine containing toothpaste and control treatment.


Assuntos
Clareamento Dental , Descoloração de Dente , Cor , Corantes , Estética Dentária , Humanos , Isoindóis , Metaloporfirinas , Descoloração de Dente/tratamento farmacológico , Escovação Dentária , Cremes Dentais
9.
Ars pharm ; 61(4): 223-229, oct.-dic. 2020. ilus, tab
Artigo em Espanhol | IBECS | ID: ibc-195235

RESUMO

INTRODUCCIÓN: La apariencia y el color de los dientes es una preocupación común para los pacientes por lo que hay una creciente necesidad de contar con tratamientos que mejoren la estética dental. Por esa razón, en los últimos 20 años la ciencia dental ha buscado nuevas técnicas y materiales capaces de reducir la discoloración dental. MÉTODO: Se prepararon pastillas de goma fantasía, caramelos de goma o gominolas que contenían dos concentraciones diferentes (7% y 14% m/v) de peróxido de hidrógeno microencapsulado por gelificación iónica. Durante 30 días se realizó un tratamiento diario de blanqueamiento dental in vitro para evaluar la acción blanqueadora de las dos formulaciones. La medición del color de la superficie de los dientes tratados se llevó a cabo utilizando una técnica colorimétrica. RESULTADOS: Se encontraron diferencias significativas entre los tratamientos de blanqueamiento con las dos formulaciones elaboradas en comparación con un grupo de control, siendo el esquema de dos procedimientos diarios con la formulación al 7% de peróxido de hidrógeno más efectivo que el de un único procedimiento diario con la formulación al 14%. CONCLUSIONES: Las dos formulaciones desarrolladas en este estudio tuvieron un mayor efecto de blanqueamiento in vitro en comparación con un grupo de control, y además se encontró que se logran mejores resultados al disminuir la concentración de peróxido si el número de aplicaciones aumenta para dosis diarias iguales


INTRODUCTION: The appearance and color of the teeth are common concerns for patients and are associated with an increased need for treatments that can improve dental aesthetics. For this reason, in the past 20 years, dental science has been searching for new techniques and materials able to reduce dental discoloration. METHOD: Gummy candies containing two different concentrations (7% and 14% w/v) of hydrogen peroxide microencapsulated by ionic gelation were prepared. In vitro tooth whitening treatment was carried out for 30 days to test the bleaching action of these formulations. The surface color of the treated teeth was measured using a colorimetric technique. RESULTS: Significant differences were found on comparing the whitening treatments for the two formulations with a control group, with two daily treatments using the formulation with 7% hydrogen peroxide being more effective for whitening than a daily single treatment using the formulation with 14 %. CONCLUSIONS: The two formulations developed had an in vitro higher bleaching effect in comparison with the control group, and in addition, better results were achieved if the daily dose was provided by more applications at a lower concentration of hydrogen peroxide


Assuntos
Humanos , Clareadores Dentários/química , Peróxido de Hidrogênio/química , Composição de Medicamentos/métodos , Borracha/química , Colorimetria/métodos , Clareamento Dental/métodos , Descoloração de Dente/prevenção & controle , Análise de Variância , Fatores de Tempo , Valores de Referência , Teste de Materiais , Reprodutibilidade dos Testes
10.
Niger J Clin Pract ; 23(12): 1643-1647, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33355815

RESUMO

Aims: The aim of this study is to evaluate the gap distance of two cementation techniques for laminate veneers fabricated on maxillary anterior teeth using heat-pressed ceramic, finger pressure, and ultrasonic cementation techniques. Material and Methods: A total number of 42 extracted natural central incisors were prepared to receive ceramic laminate veneers, laminate veneers were constructed in the laboratory using heat-pressed ceramic according to manufacturer's instructions (IPS e.max). Ceramic veneers were divided into two groups and cemented using two different cementation techniques (Ultrasonic, finger pressure). Marginal gap distance was measured in microns at the margins using a stereomicroscope and special computer software (quantitative assessment). Results: The ultrasonic cementation technique recorded 63.3 ± 27.8 µm, which was significantly lower than the finger pressure technique (91.5 ± 21.4 µm). Conclusions: The ultrasonic cementation technique improved the gap distance at the tooth/ceramic interface when compared to the finger pressure technique using the light cure cement.


Assuntos
Cimentação , Descoloração de Dente , Cerâmica , Facetas Dentárias , Temperatura Alta , Humanos , Teste de Materiais , Cimentos de Resina
11.
Ned Tijdschr Tandheelkd ; 127(12): 677-681, 2020 Dec.
Artigo em Holandês | MEDLINE | ID: mdl-33367294

RESUMO

A healthy adult male patient presented himself, 11 days after a fixed orthodontic appliance was placed, with a sudden pink discoloration of the dental crown of tooth 21. The emergency dentist on call diagnosed the discoloration as non-painful peri-apical periodontitis, partly on the basis of a radiograph, and recommended endodontic treatment of tooth 21. Prior to endodontic treatment, the patient was first seen by the orthodontist who had initiated treatment. Tooth 21 was investigated and reacted normally to percussion and palpation but did not react to the cold test. The patient was referred to an endodontist who made the likely diagnosis: 'Transient apical breakdown'. No endodontic treatment was carried out and the orthodontic treatment was not interrupted. Six weeks after the discoloration appeared, visible recovery was evident.


Assuntos
Periodontite Periapical , Descoloração de Dente , Adulto , Dente Pré-Molar , Humanos , Masculino , Descoloração de Dente/diagnóstico , Descoloração de Dente/etiologia
12.
Beijing Da Xue Xue Bao Yi Xue Ban ; 52(5): 943-947, 2020 Oct 18.
Artigo em Chinês | MEDLINE | ID: mdl-33047734

RESUMO

OBJECTIVE: To select the most effective method among different masking treatments, such as different thickness and transparence, tissue surface's opaque coating, and opaque resin cement to restore discolored teeth esthetically by porcelain veneer. METHODS: Four extracted intact maxillary central incisors were prepared for porcelain veneer restoration and each three heat pressed porcelain veneers from three thicknesses (0.8 mm, 1.0 mm, 1.2 mm) and two transparency(high transparence, HT and low transparence, LT))in Vita shade A2 were fabricated for each tooth, in total of 72 pieces. The surfaces of three prepared teeth were then painted to mimic situations of severe dental fluorosis, severe tetracycline teeth, and necrotic teeth. Each of the veneers was temporarily cemented to the corresponding tooth surface using try-in cements with three different colors (transparent, opaque, and yellow), then used the shade guide (3D master) and electronic colorimeter (easy shade) to record the shade of each porcelain veneer through hue, lightness, and chroma reading. After that, high-transparence porcelain veneers in thickness of 0.8 mm was fused with a layer of opaque porcelain in tissue surface, and were shade matched again after cementation. Statistic treatments were performed to analyze the difference in each masking method. RESULTS: For each 0.2 mm increase in the veneer thickness of porcelain, the average lightness was reduced by 1 unit, while the chroma was not changed which was independent of the type of the resin cements. When the thickness of the porcelain veneer was decreased to 0.8 mm, the opacity effect was not remarkable even if a low-transparence porcelain veneer was used. Transparent and yellow resin cements had poor opaque performance, while opaque resin cement could reduce the lightness by 2 units and the chroma was also reduced. The opaque layer of the tissue surface could be applied uniformly, and the lightness and chroma could be reduced to Vita 2M1 to 2M1.5 levels regardless of the color of resin cements, which suggested a stable opacity effect for different discolored teeth in this study. CONCLUSION: For porcelain veneer restoration of discolored teeth, thickened veneers are the most effective means to display a natural transmittance and color. Tissue surface's opacity coatings and opaque resin cements can also be used to reduce grayscale and increase lightness.


Assuntos
Descoloração de Dente , Cor , Humanos , Teste de Materiais , Pigmentação em Prótese , Cimentos de Resina , Descoloração de Dente/terapia
13.
J Endod ; 46(12): 1913-1919, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-32949559

RESUMO

INTRODUCTION: New tricalcium silicate cements have been shown to induce less coronal discoloration. The purpose of this in vitro study was to evaluate the degree of color change induced by various silicate materials in the presence and absence of blood. METHODS: One hundred human extracted anterior single-canal teeth were sectioned to standardized root lengths, accessed, and instrumented. Eight random experimental groups and 2 control groups were created wherein specimens were filled with experimental materials below the buccal cementoenamel junction as follows: EndoSequence RRM putty (Brasseler USA, Savannah, GA), EndoSequence RRM fast set putty (Brasseler USA), Biodentine (Septodont, Saint-Maur-des-Fossés, France), and white mineral trioxide aggregate (Dentsply Sirona, York, PA) either with the presence or absence of blood. Blood-only and saline-only samples were used for the positive and negative controls. After incubation in 100% humidity at 37°C, color changes were evaluated with a spectrophotometer (Ocean Optics, Dunedin, FL) on days 0, 30, 60, and 180 after material placement. Data were transformed into Commission International de I'Eclairage's L∗a∗b color values, and corresponding ΔE values were calculated. The 1-way analysis of variance test was performed for statistical analysis. RESULTS: Discoloration was observed in all specimens in the presence of blood. There was no statistical significance when comparing different materials in contact with blood. Intragroup observation at various time points, Biodentine, and EndoSequence RRM fast set putty showed significant difference between the presence and absence of blood at 180 days (P < .05). CONCLUSIONS: Contamination with blood of tricalcium silicate materials has the potential to cause coronal tooth discoloration.


Assuntos
Materiais Restauradores do Canal Radicular , Descoloração de Dente , Dente , Compostos de Alumínio , Compostos de Cálcio/efeitos adversos , Combinação de Medicamentos , França , Humanos , Óxidos , Materiais Restauradores do Canal Radicular/efeitos adversos , Silicatos/efeitos adversos , Descoloração de Dente/induzido quimicamente
15.
Acta Odontol Latinoam ; 33(2): 59-68, 2020 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-32920607

RESUMO

The aim of this in vitro study was to evaluate the effect of bleaching protocols on the surface roughness (Ra), color change and surface micromorphology of a low-viscosity bulk-fill composite (Filtek Bulk Fill Flow, 3M ESPE), a highviscosity bulk-fill composite (Filtek Bulk Fill, 3M ESPE) and a conventional nanoparticulate composite resin (control) (Filtek Z350 XT, 3M ESPE). Forty samples of each composite (disks 5 mm in diameter and 2 mm thick) were randomly divided into four groups (n=10), according to bleaching protocol: a) 10% carbamide peroxide gel (Opalescence, Ultradent Products) (2 h/ day, for 14 days); b) 40% hydrogen peroxide gel (Opalescence Boost, Ultradent Products) (three bleaching sessions, once a week, 45 min/session); c) whitening rinse (Listerine Whitening Extreme, Johnson & Johnson) (2 min/day, for 14 days); and d) distilled water (control). The samples were submitted to triplicate readings (Ra and color [CIELAB parameters]) before and after contact with bleaching protocols. Micromorphology was analyzed in a scanning electron microscope (SEM). Ra and color parameters (ΔL, Δa, Δb and ΔE) were analyzed by generalized linear models (α=0.05). The Ra of the high-viscosity bulk-fill was significantly higher than that of the other composites (p<0.05). Ra increased significantly (p<0.05) and surface became more irregular (SEM analysis) in all the composite resins, regardless of the bleaching protocol (p<0.05). The high-viscosity bulk-fill composite resin group had significantly lower ΔE (p<0.05) than the nanoparticulate composite resin group immersed in distilled water. It was concluded that the characteristics of each resin significantly influenced the Ra more than the bleaching protocol. The high-viscosity bulk-fill resin presented minor color change.


Assuntos
Resinas Compostas/química , Peróxido de Hidrogênio/química , Clareadores Dentários/química , Clareamento Dental/métodos , Descoloração de Dente/tratamento farmacológico , Viscosidade/efeitos dos fármacos , Cor , Humanos , Teste de Materiais
16.
Niger J Clin Pract ; 23(9): 1312-1317, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32913173

RESUMO

Objective: The present study compared the ability of bleaching, resin infiltration and microabrasion to restore the appearance of existing white spot lesions (WSL) on tooth surfaces as close as possible to that of the original healthy enamel. Materials and Methods: Sixty extracted human teeth with WSL were randomly assigned to three treatment groups (20/group). Prior to treatment, the colour of the surrounding healthy enamel and the WSL were measured as the baseline and pre-treatment (PreRX) colours respectively using spectrophotometer based on CIE L*A*B. The L-value was used for the statistical comparison. WSLs in each group were treated respectively by bleaching, infiltration or microabrasion following the manufacturer's instructions. Colour measurement was repeated after treatment. Both intragroup and intergroup comparisons were performed using ANOVA followed by Tukey's multiple comparison test (α=0.05). Result: In all groups the mean L-values were significantly higher in PreRX WSL (P < 0.01; Tukey) compared to baseline (sound enamel). After treatment the difference in mean L-value between baseline and WSL increased significantly (P < 0.01, Tukey) in Bleaching and Microabrasion groups by 1.4% and 1% respectively, but decreased in Infiltration group by 3.4%. Thus resin infiltration decreased the L-value of the WSL, bringing it closer to the L-value of the sound enamel while bleaching and microabrasion increased the L-value. Conclusions: Among the three treatment modalities investigated in this study, resin infiltration was the most effective in masking the WSLs.


Assuntos
Cárie Dentária/terapia , Microabrasão do Esmalte , Estética Dentária , Resinas Sintéticas/uso terapêutico , Clareamento Dental/métodos , Biometria , Cárie Dentária/patologia , Humanos , Resinas Sintéticas/química , Espectrofotometria , Descoloração de Dente , Resultado do Tratamento
17.
J Oral Sci ; 62(4): 458-460, 2020 Sep 26.
Artigo em Inglês | MEDLINE | ID: mdl-32863316

RESUMO

The purpose of this case report is to describe a minimally invasive technique for non-vital tooth bleaching using traditional Japanese paper, known as washi. Non-vital tooth bleaching with a mixture of sodium perborate and 30% hydrogen peroxide rolled in Japanese paper for a traumatically injured tooth, and in-office vital-tooth bleaching for the upper front six teeth and first premolars, were performed. Five-year follow-up showed satisfactory stability in the bleaching effects and did not show any problems in the traumatically injured tooth. The use of Japanese paper for non-vital tooth bleaching may minimize damage to discolored non-vital teeth.


Assuntos
Clareamento Dental , Descoloração de Dente , Dente não Vital , Dente Pré-Molar , Humanos , Peróxido de Hidrogênio , Japão
18.
Ann Afr Med ; 19(3): 211-214, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32820736

RESUMO

Fluorosis is an endemic disease, prevailing in about 25 countries globally. Dental fluorosis is an acquired defect of enamel due to the exposure of an individual to excessive fluoride levels during tooth development. It could result in mild-to-severe discoloration of teeth, which might necessitate esthetic correction. Bleaching is one of the common treatment modalities used in the esthetic correction of such cases. In-office power bleaching is one of the techniques of tooth bleaching that involves clinical application and activation of the bleaching agent with light to accelerate the bleaching process. This case report describes the esthetic correction of severe dental fluorosis by power bleaching, without any need for invasive treatment. This report suggests that in-office power bleaching is an effective and conservative method for esthetic correction of tooth discoloration in severe dental fluorosis.


Assuntos
Fluorose Dentária/terapia , Clareamento Dental/métodos , Descoloração de Dente/etiologia , Adolescente , Estética , Fluorose Dentária/complicações , Humanos , Masculino , Clareamento Dental/efeitos adversos , Descoloração de Dente/terapia , Resultado do Tratamento
19.
Ned Tijdschr Tandheelkd ; 127(7-08): 402-405, 2020.
Artigo em Holandês | MEDLINE | ID: mdl-32840494

RESUMO

Activated charcoal-based whitening dentifrices claim to whiten teeth. Scientific evidence for the actual whitening effect, however, is still limited. A search in PubMed shows one randomized controlled double blinded in vitro study in which the'Black is White Curaprox® dentifrice is less effective in reducing extrinsic staining than other whitening dentifrices. One systematic literature review and one review article concluded there is insufficient scientific evidence to substantiate the cosmetic benefits of charcoal-based dentifrices.


Assuntos
Dentifrícios , Clareamento Dental , Descoloração de Dente , Humanos , Dióxido de Silício , Fluoreto de Sódio
20.
Braz Dent J ; 31(3): 221-235, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32667517

RESUMO

There is an increased accessibility of over-the-counter (OTC) whitening agents with very little data in the literature regarding their effectiveness. This review was done to determine their effectiveness of the predominant OTC whitening agents from 2006 until 2018 where a comparison of each agent was made with a placebo, no treatment or with other OTC whitening agents. The major categories of OTC whitening agents such as dentifrices, whitening strips and paint on gels. Dentist prescribed bleaching applied at home and in-office bleaching studies and studies that demonstrated whitening products to participants were excluded. Articles were searched for in the databases of Medline (Ovid), PubMed, the Cochrane Library and Cochrane Central Register of Controlled Trials. Twenty-four articles were included in the systematic review and the quality of studies was determined by the GRADE (Grading of Recommendations, Assessment, Development and Evaluations) ranking criteria. Compared to other OTC, strips are reported to be effective. Two studies determined whitening strips to be effective. Whitening strips have been shown to be effective when compared with placebos and other OTC whitening agents. Dentifrices are effective in changing the shade of the tooth "by removing extrinsic stains" when compared to a placebo and non-whitening dentifrices, but they are not as effective in comparison to whitening strips. There is a lack of evidence with regards to the effectiveness of paint-on gels. While there is some evidence that OTC can alter shade in the short term, there is a need for better-designed studies.


Assuntos
Clareadores Dentários , Clareamento Dental , Descoloração de Dente , Peróxido de Carbamida , Humanos , Ureia
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...