Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 1.115
Filtrar
1.
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
2.
Clin Oral Investig ; 23(11): 4113-4122, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-30788695

RESUMO

OBJECTIVES: The effect of ultrasonic agitation (UA) on bond strength and adaptation of cervical plugs prepared with MTA Angelus (MTA), MTA Repair HP (MTAHP), and Biodentine (BIO) was evaluated. Dentin discoloration caused by the materials/treatment was also assessed. MATERIALS AND METHODS: Seventy-two single rooted teeth were divided into six groups depending on the materials/treatment. After cervical plug preparation, dentin discs were excised for the push-out test; additional discs were analyzed under the confocal microscope to determine adaptation (gaps occurrence). For dentin discoloration analysis (ΔE), blocks of bovine incisors had cavities prepared and filled with the materials/treatment (from 7 to 180 days). RESULTS: Both bond strength and adaptation were positively influenced by UA (P < 0.05). Comparison between materials showed an advantage for BIO when compared to MTAHP (P < 0.05). The best and worst results were provided by BIO/UA (12.66 MPa and 1.87%) and MTAHP (2.54 MPa and 28.58%), respectively. For ΔE, significant differences were observed throughout the periods. Just the MTA without UA exhibited noticeable discoloration at 180 days (P < 0.05). CONCLUSIONS: UA favored a better adaptation of the materials to the dentin root, resulting in higher bond strength and adaptation of the materials to the root canal walls. Moreover, UA reduced MTA discoloration, keeping it imperceptible over the period evaluated. CLINICAL RELEVANCE: The better adaptation and higher bond strength provided by UA can be considered clinically relevant due to the importance of maintaining blood clot integrity and the possible esthetic compromise provided by reparative materials when used as coronary barrier in regenerative procedures.


Assuntos
Materiais Restauradores do Canal Radicular , Descoloração de Dente , Terapia por Ultrassom , Compostos de Alumínio , Animais , Compostos de Cálcio , Bovinos , Dentina , Combinação de Medicamentos , Estética Dentária , Óxidos , Silicatos , Descoloração de Dente/terapia , Ultrassom
3.
Rev. ADM ; 76(1): 30-37, ene.-feb. 2019. ilus, tab
Artigo em Espanhol | LILACS | ID: biblio-995811

RESUMO

La odontología de mínima invasión se ha convertido en la filosofía de tratamiento dental más aceptada en la actualidad. La posibilidad de incorporarla se ha debido en gran medida a la aparición de nuevos materiales dentales que se adhieren a la estructura dental, a técnicas más conservadoras de estructura dental sana y sobre todo a una nueva forma de pensar tanto de clínicos como de los mismos pacientes. La odontología estética contemporánea se ha visto infl uenciada por este nuevo paradigma. El tratamiento de pigmentaciones dentales también se ha visto benefi ciado por esta nueva tendencia y nuevos materiales han aparecido recientemente que conservan la mayor cantidad de tejido dental sano sin necesidad de preparaciones no conservadoras. Lo más importante al incorporar estas nuevas tecnologías es la realización de un diagnóstico adecuado entendiendo la causa que origina esta condición y así poder implementar el mejor tratamiento posible (AU)


Minimally invasive dentistry has become the standard of care most widely accepted today. This trend has been posible in great extent to the advent of new dental materials that adhere to dental structure, more conservative techniques of healthy dental tissue but mainly from clinicians and patients with a new way of thinking. Contemporary esthetic dentistry has been influenced by this new paradigm. Treatment of dental stainings has also been infl uenced by this new trend and new materials have recently surfaced that keep healthy dental tissue without the need of non conservative preparations. The most important aspect in order to incorporate this new technologies is a correct diagnosis understanding the cause that originated this condition in order to implement the best posible treatment (AU)


Assuntos
Humanos , Descoloração de Dente/terapia , Microabrasão do Esmalte , Estética Dentária , Clareamento Dental , Materiais Biocompatíveis , Hidróxido de Cálcio , Polimento Dentário , Restauração Dentária Permanente , Ácido Clorídrico , Fluorose Dentária/terapia
4.
Oper Dent ; 44(1): 24-33, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30059269

RESUMO

OBJECTIVE:: This randomized clinical study evaluated two parameters: 1) the clinical color rebound of whitening patients' tooth discoloration using the walking bleaching technique and 2) the impact on psychological and aesthetic self-perception at the one-year follow-up of patients who underwent bleaching of nonvital teeth. METHODS AND MATERIALS:: Fifty study participants with nonvital tooth discoloration were recruited. Teeth were assigned randomly into one of two groups: 1) 35% hydrogen peroxide (n=25) and 2) 37% carbamide peroxide (n=25). Intracoronal bleaching was carried out over the course of four sessions using the walking bleach technique. Tooth color was evaluated after each session in order to measure the total color variation (ΔE). The guide was arranged from highest (B1) to lowest values (C4) for evaluating color, and color changes using Vita Classical Shade (ΔSGUs) units were calculated. Subjective and objective assessments were compared with the counterpart of the tooth. Aesthetic perception and psychosocial factors were evaluated before and after treatment by the Oral Health Impact Profile (OHIP) and Psychological Impact of Dental Impact Questionnaire (PIDAQ) surveys. RESULTS:: Color changes (ΔE) were 15.48 ± 5.17 and 14.02 ± 4.85 for carbamide and hydrogen peroxide groups, respectively. There were no significant differences ( p>0.05) between these two groups at the one-year follow-up. There was a decrease in the PIDAQ scores after treatment compared to baseline values ( p<0.05). The majority of OHIP values regressed to baseline values. CONCLUSION:: The technique of walking bleaching was highly effective and showed minimal color rebound in nonvital teeth and had a positive effect on patients' psychological impact at the one-year follow-up.


Assuntos
Qualidade de Vida , Clareadores Dentários/uso terapêutico , Clareamento Dental/métodos , Descoloração de Dente/terapia , Adulto , Idoso , Peróxido de Carbamida/uso terapêutico , Método Duplo-Cego , Estética Dentária , Feminino , Seguimentos , Humanos , Peróxido de Hidrogênio/uso terapêutico , Masculino , Pessoa de Meia-Idade , Recidiva , Fatores de Tempo , Dente não Vital , Resultado do Tratamento
5.
Clin Oral Investig ; 23(1): 161-167, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29654563

RESUMO

OBJECTIVES: To investigate teeth's antibiotic-induced color differences after bleaching using two different techniques. MATERIALS AND METHODS: One hundred twenty extracted maxillar human incisors were examined. The specimens were randomly divided into six groups, each receiving one of six antibiotic paste fillings: (1) triple antibiotic paste (TAP) with minocycline, (2) double antibiotic paste (DAP), (3) TAP with amoxicillin, (4) TAP with cefaclor, (5) TAP with doxycycline, and (6) no filling (control group). Spectrophotometric measurements were obtained at baseline and then during the first, second, and third weeks after paste placement. The specimens discolored by antibiotics pastes were randomly divided into two subgroups: (1) internal bleaching with hydrogen peroxide (H2O2) and (2) internal bleaching with H2O2 plus Nd-YAG laser irradiation. The ∆E value was calculated and analyzed using a two-way analysis of variance and post-hoc Tukey's test (α = 0.05). RESULTS: The ∆E for all groups showed color differences exceeding the perceptibility threshold (∆E Ëƒ 3.7) at all time points except in the control and DAP groups. Minocycline-induced TAP showed the most severe coronal discoloration (32.42). When the ∆E was examined, thermo/photo bleaching (22.01 ± 8.23) caused more bleaching than walking bleaching (19.73 ± 5.73) at every time point (P = 0.19). No group returned to the original color after bleaching (P < 0.05). CONCLUSIONS: Except for DAP, all antibiotic pastes caused discoloration. Internal bleaching with Nd-YAG laser can be useful for bleaching/removing this discoloration. CLINICAL RELEVANCE: For clinically successful final appearances, understanding the effects of bleaching procedures on antibiotic paste discoloration is important.


Assuntos
Antibacterianos/efeitos adversos , Lasers de Estado Sólido/uso terapêutico , Espectrofotometria/métodos , Clareamento Dental/métodos , Descoloração de Dente/induzido quimicamente , Descoloração de Dente/terapia , Amoxicilina/efeitos adversos , Amoxicilina/uso terapêutico , Antibacterianos/uso terapêutico , Cefaclor/efeitos adversos , Cefaclor/uso terapêutico , Ciprofloxacino/efeitos adversos , Ciprofloxacino/uso terapêutico , Doxiciclina/efeitos adversos , Doxiciclina/uso terapêutico , Humanos , Peróxido de Hidrogênio/uso terapêutico , Técnicas In Vitro , Metronidazol/efeitos adversos , Metronidazol/uso terapêutico , Minociclina/efeitos adversos , Minociclina/uso terapêutico
6.
Shanghai Kou Qiang Yi Xue ; 27(3): 257-260, 2018 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-30411119

RESUMO

PURPOSE: The aim of this study was to compare if there was any difference in the enamel discoloration after staining when three orthodontic adhesives and 4 enamel clean-up methods were tested. METHODS: Three types of orthodontic adhesives were used: chemically cured resin, light-cured resin and resin-modified glass-ionomer cement. A total of 120 human extracted premolars were included. Ten teeth of each orthodontic adhesive were randomly cleaned-up with 1 of 4 different procedures and stained in coffee for 7 days: carbide bur (TC), carbide bur and Sof-Lex polishers (TC+SL), carbide bur and One Gloss polishers (TC+OG), carbide bur and PoGo polishers (TC+PG). Colour measurements were made with Crystaleye dental spectrophotometer at baseline and after storage in a coffee solution for 1 week. Two way ANOVA and Bonferroni test were used for statistical analysis with SPSS 13.0 software package. RESULTS: The colour change values of adhesive materials in the TC group were the greatest. The lowest ΔE* values were obtained from the TC+SL group. However, there was no significant difference between the TC+SL and TC+PG group (P>0.05). The resin-modified glass-ionomer cement group showed the lowest colour differences and chemically cured resin group showed the highest ΔE* values among all orthodontic adhesives (P<0.05). CONCLUSIONS: The colour change of enamel surface is affected by the type of adhesive materials and clean-up procedures.


Assuntos
Cimentos Dentários , Descolagem Dentária , Esmalte Dentário , Descoloração de Dente , Condicionamento Ácido do Dente , Resinas Acrílicas , Colagem Dentária , Cimentos de Ionômeros de Vidro , Humanos , Teste de Materiais , Braquetes Ortodônticos , Distribuição Aleatória , Cimentos de Resina , Descoloração de Dente/etiologia , Descoloração de Dente/terapia
7.
J Clin Dent ; 29(2): 57-63, 2018 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-30211992

RESUMO

OBJECTIVES: The aim of this combined in vitro and in vivo study was to evaluate the efficacy of tooth whitening using a mixture of Self- Assembling Peptide Matrix (SAPM) and hydroxyapatite (HA). METHODS: The mixture was applied on stained bovine teeth, and the tooth color was measured using a spectrophotometer; mean changes in L*a*b values between measurements were expressed as DE. Additionally, the nature of the surface layer was investigated by ATRFTIR and EDX. The optical changes due to the additional surface layer were measured using a goniometer. Finally, a proof-of-concept clinical study was performed investigating the mixture of SAPM+HA. RESULTS: The results verified that the SAPM remained on the tooth surface and acted as a temporary adhesive to attach the HA particles to the tooth surface. Further, the optical changes due to the additional surface layer indicated a diffuse reflection to be the origin of the optical whitening. Lastly, the mixture of SAPM+HA showed significant and visible whitening after one application, increasing throughout the first week of home application (DE = 4.9 ± 3.3) and remaining stable for 30 days (DE = 4.8 ± 3.6). CONCLUSIONS: The combination of SAPM+HA particles caused optical whitening based on diffuse reflection by the HA particles on the tooth surface. The whitening effect and its magnitude observed in vitro were also seen in vivo.


Assuntos
Peptídeos , Clareamento Dental , Descoloração de Dente , Dente , Animais , Bovinos , Cor , Durapatita , Peróxido de Hidrogênio , Peptídeos/uso terapêutico , Descoloração de Dente/terapia
8.
Am J Dent ; 31(Sp Is A): 4A-6A, 2018 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-30106526

RESUMO

PURPOSE: Recently, a unique two-step product was introduced that includes sequential use of a novel 0.454% stannous fluoride dentifrice followed by a 3% hydrogen peroxide whitening gel. The technology targeted advanced gingival health benefits plus esthetic benefits such as tooth whitening. The two-step sequence has unique brushing instructions to maximize the efficacy of each step; the stannous fluoride dentifrice is used for 1 minute of brushing followed by 1 minute of brushing with the hydrogen peroxide gel. This two-step sequence has been studied in numerous clinical trials over a series of years. This comprehensive program included different populations and sites, endpoints and time points, with responses measured versus different positive and negative research controls. A total of six clinical trials are reported herein. Outcomes from this research program demonstrate the significant gingival health efficacy of the two-step product, providing therapeutic efficacy comparable to chlorhexidine, and its positive impact on plaque, tooth stain and breath odor. CLINICAL SIGNIFICANCE: This unique dentifrice/gel sequence delivers a combination of advanced gingivitis efficacy with significant stain reduction - benefits that will positively impact oral health as well as patient compliance.


Assuntos
Placa Dentária , Dentifrícios , Fluoretos de Estanho , Descoloração de Dente , Análise de Variância , Dentifrícios/uso terapêutico , Método Duplo-Cego , Humanos , Fluoreto de Sódio , Fluoretos de Estanho/uso terapêutico , Descoloração de Dente/terapia
9.
J Contemp Dent Pract ; 19(7): 762-767, 2018 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-30066677

RESUMO

AIM: To evaluate the effect of different stain removal protocols with or without topical fluoride application on the bond strength of orthodontic brackets to enamel. MATERIALS AND METHODS: Eighty extracted premolars were randomly assigned into four groups according to the stain removal protocol. The stain removal protocols were (1) using rubber cup with prophylaxis paste in (G1, n = 20), (2) air-abrasion with prophy-jet polishing system (G2, n = 20), (3) micro-abrasion with opalusture polishing paste (G3, n = 20), and (4) macro-abrasion with ultrafine diamond finishing tips (G4, n = 20). Ten teeth in each group (SG1, n = 10) had no topical fluoride treatment after stain removal protocol, while the rest (SG2, n = 10) were subjected to topical fluoride application. After bonding the orthodontic brackets, all specimens were thermocycled before testing their bracket-enamel bond strength. The debonded bracket and enamel surfaces of each specimen were also assessed to determine the adhesive remnant index (ARI) for each subgroup. RESULTS: Specimens in G2, G3, and G4 recorded lower shear bond strength as compared with G1 (p < 0.05). For all groups, specimens in SG2 demonstrated lower bond strength than their counterpart in SG1 (p < 0.05). No significant differences were detected between the ARIs of different subgroups (p > 0.05). CONCLUSION: Bonding orthodontic brackets is affected by the protocol of removing enamel stains. The use of the rubber cup with prophylaxis paste provided the highest bracket-enamel bond strength. Topical fluoride application usually complicates the bonding process of orthodontic brackets to cleaned enamel surfaces. CLINICAL SIGNIFICANCE: The results of the current study indicate higher bracket bond strength to enamel surfaces treated with different stain removal protocols than the clinically acceptable values (5.9-7.8 MPa). However, the more aggressive enamel pretreatment methods should not be considered unless the clinical situation necessitates such action. Postponing the topical fluoride application is advisable to follow the bracket bonding procedure. This action would prevent the negative effect of topical fluorides on bracket-enamel bond strength.


Assuntos
Colagem Dentária , Esmalte Dentário , Placa Dentária/terapia , Braquetes Ortodônticos , Resistência ao Cisalhamento , Descoloração de Dente/terapia , Microabrasão do Esmalte , Fluoretos Tópicos/administração & dosagem , Humanos
10.
Int J Esthet Dent ; 13(3): 302-317, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30073215

RESUMO

In the case of discolored devitalized anterior teeth, several treatments are available to enhance the esthetic outcome, from noninvasive external/internal bleaching to freehand resin composites and more complex prosthetic solutions such as veneers or full crowns. Innovative computer-aided design/computer-aided manufacturing (CAD/CAM) chairside technologies and the introduction of new industrially polymerized composite resin blocks coupled with modern adhesive strategies have reduced both biological and financial costs compared to the classic post-core-crown approach. The aim of this article is to show how these new materials can be used in association with noninvasive internal and external tooth bleaching to restore a discolored, fractured, non-vital central incisor.


Assuntos
Restauração Dentária Permanente/métodos , Estética Dentária , Incisivo , Descoloração de Dente/terapia , Dente não Vital/terapia , Condicionamento Ácido do Dente , Adulto , Resinas Compostas , Desenho Assistido por Computador , Humanos , Masculino , Maxila , Cimentos de Resina , Propriedades de Superfície , Clareamento Dental , Descoloração de Dente/etiologia
11.
Int J Esthet Dent ; 13(3): 394-403, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30073220

RESUMO

This study evaluated the effectiveness of resin infiltration or enamel microabrasion for restoring color changes caused by incipient carious lesions as well as the color stability achieved by these treatments. Enamel specimens were subjected to cariogenic challenge to produce white spot lesions (WSLs) using a microcosm biofilm model. These lesions were treated with resin infiltration or enamel microabrasion (n = 8), and color changes were measured with a spectrophotometer at baseline and after the treatments. Untreated specimens were used as a control. The treated specimens were then immersed in coffee for 1 week, and tooth color was measured again. Data for ΔL*, Δa*, Δb*, and ΔE were analyzed by two-way repeated measures ANOVA and Tukey's test (α = 0.05). Caries induction resulted in significant color changes, mainly decreased lightness. Neither resin infiltration nor enamel microabrasion were able to restore tooth color. The specimens subjected to resin infiltration and the control specimens were more susceptible to color changes following immersion in coffee. In conclusion, enamel microabrasion and resin infiltration were unable to restore the initial tooth color observed prior to WSL induction. Moreover, resin-infiltrated enamel seems more susceptible to staining solutions than enamel subjected to microabrasion.


Assuntos
Resinas Compostas/química , Microabrasão do Esmalte , Desmineralização do Dente/terapia , Descoloração de Dente/terapia , Animais , Bovinos , Cor , Cárie Dentária/terapia , Estética Dentária , Técnicas In Vitro , Incisivo , Distribuição Aleatória , Espectrofotometria , Propriedades de Superfície
12.
Shanghai Kou Qiang Yi Xue ; 27(1): 65-67, 2018 Feb.
Artigo em Chinês | MEDLINE | ID: mdl-29946645

RESUMO

PURPOSE: To evaluate the clinical effectiveness of cold-light whitening technique on tetracycline pigmentation teeth and aged extrinsic stain teeth. METHODS: One hundred and fifty-two cases bleached by cold-light whitening technique were included in this study. The patients' teeth were divided into 3 groups: aged extrinsic stain teeth, mild tetracycline pigmentation teeth and moderate tetracycline pigmentation teeth. Visual determination of shade and Olympus crystaleye spectrophotometer were used to measure the tooth discoloration after bleaching. SPSS17.0 software package was used for statistical analysis. RESULTS: Visual determination showed that the efficiency of aged extrinsic stain teeth was significantly higher than that of mild and moderate tetracycline teeth group (P<0.05). Colorimetric method showed that the △E of moderate tetracycline teeth was significantly lower than aged extrinsic teeth and mild tetracycline teeth (P<0.05) . The △E of cervix changed more significantly than that of central and incisal edge in both mild and moderate tetracycline teeth group (P<0.05). CONCLUSIONS: The effect of cold-light whitening technique on aged extrinsic stain teeth is better than that of the tetracycline pigmentation teeth. Cold-light whitening technique can improve pigmentation of tetracycline teeth cervix..


Assuntos
Antibacterianos , Tetraciclina , Clareamento Dental , Descoloração de Dente , Antibacterianos/efeitos adversos , Corantes , Dentifrícios , Humanos , Pigmentação , Tetraciclina/efeitos adversos , Descoloração de Dente/terapia
13.
J Dent ; 74 Suppl 1: S42-S46, 2018 07.
Artigo em Inglês | MEDLINE | ID: mdl-29929588

RESUMO

OBJECTIVES: To review the key concepts of color in the dental domain with specific reference to the use of digital technology to measure color and color appearance. MATERIALS AND METHODS: The literature on color assessment in dentistry is considered and methods for assessing whiteness, yellowness and color appearance are collated and described. RESULTS AND CONCLUSION: A variety of methods for assessing color have been shown to exist and be viable including digital imaging. Equations to predict whiteness are identified; there is evidence that they are effective but further evaluation may be needed.


Assuntos
Clareamento Dental/métodos , Descoloração de Dente/diagnóstico por imagem , Descoloração de Dente/terapia , Cor , Percepção de Cores , Colorimetria/métodos , Estética Dentária , Humanos , Processamento de Imagem Assistida por Computador/métodos , Incisivo/diagnóstico por imagem , Variações Dependentes do Observador , Óptica e Fotônica , Fotografia Dentária/métodos , Espectrofotometria/métodos , Descoloração de Dente/classificação
14.
J Clin Dent ; 29(1): 13-17, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29758152

RESUMO

OBJECTIVES: Two different studies were conducted to evaluate the whitening efficacy of a mouthwash versus a placebo using in vitro and in vivomodels. The tested mouthwash was formulated with no oxidizing or abrasive agents containing chlorhexidine (CHX) and polyvinylpyrrolidone (PVP). METHODS: The purpose of the in vitro study was to determine whether the mouthwash formulation OC15AB could reduce the accumulation of staining in an accepted stain model. Bovine central incisors were cut to obtain enamel specimens of ~8 × 8 mm2. The specimens were then immersed in human saliva (room temperature, slight stirring) for one hour to allow a pellicle film to form. They were then placed in contact with a staining solution containing coffee and tea. The amount of stain (tooth color) was quantified photometrically (Minolta C221 colorimeter) using the L* value of the L*a*b* scale. The purpose of the in vivo study was to evaluate the whitening power and tolerability of OC15AB versus a placebo mouthwash in a double-blind, randomized clinical study. In total, 40 subjects were divided randomly into two homogeneous groups. Each group used a different mouthwash (OC15AB or placebo) for 56 consecutive days. During this period, clinical and instrumental parameters, namely variations in tooth color and mucosal and gum alterations, were evaluated. The in vivo study analyses used a two-sided Student's t-test. Evaluations within groups used t-tests for paired data. RESULTS: From the in vitro test, OC15AB had a significant effect in reducing stain accumulation over the entire treatment period. The in vivo test showed that OC15AB was well tolerated and had whitening power in the subjects. OC15AB demonstrated a statistically significant reduction in extrinsic tooth staining from baseline and versus the placebo. CONCLUSIONS: The in vitro and in vivo methods used to investigate the whitening efficacy of the mouthwash formulation produced similar and consistent results. The experimental model used is an important tool in the search for new technologies for teeth whitening. Our preliminary experimental data confirm the possibility of achieving a whitening effect using a mouthwash formulation with no oxidizing or abrasive agents containing CHX and PVP. The formulation tested demonstrated a significant reduction, in vitro and in vivo, in extrinsic tooth staining from baseline and versus the placebo.


Assuntos
Dentifrícios , Antissépticos Bucais , Clareamento Dental , Descoloração de Dente , Animais , Bovinos , Método Duplo-Cego , Humanos , Distribuição Aleatória , Clareamento Dental/métodos , Descoloração de Dente/terapia
15.
Av. odontoestomatol ; 34(2): 59-71, mar.-abr. 2018. tab
Artigo em Espanhol | IBECS | ID: ibc-172659

RESUMO

El color del órgano dental viene determinado desde el nacimiento, estando determinado por la tonalidad de la dentina aunada a la transparencia y capacidad de refracción de la luz del esmalte. Las descoloraciones den tales son un cambio en el tono, chroma, valor o en la translucidez del diente, puesto que el tejido adamantino es permeable, poco a poco se va tiñendo a causa de diferentes factores externos como pueden ser pigmentos (cromóforos) contenidos en alimentos o bebidas como los tomates, zanahorias, café, té o infusiones varias, que tienden adherirse a los tejidos orgánicos que ocupan los espacios interprismáticos mediante unión química a sus grupos hidroxilo y amino. Además la unión entre estas sustancias pigmentadas y los iones calcio forma nuevas moléculas que varían en tamaño y efecto óptico. Por otro lado numerosos estudios confirman que el tabaco es otro de los factores que alteran el color natural de los dientes, ya sea en cigarrillo, puros, pipa y aún no existe suficiente evidencia sobre el vapor de tabaco. El mecanismo de acción para la decoloración por el tabaco es similar al de los alimentos, salvo que en estos casos se trata de la nicotina, el grupo de alquitranes y el furufral, los cuales se depositan en la superficie dental o incluso llegan a penetrar en los túbulos dentinarios, siendo muy difícil su eliminación. Este tipo de decoloraciones se denominan extrínsecas. Técnicas de blanqueamiento en diferentes formas de aplicación, tiempo, compuestos y su concentración, han demostrado ser suficientes, aunque sin una suficiente evidencia clara y concisa, como vía de mejora del color del diente y lo que esto acarrea


The use of dental implants has become a routine treatment in the clinic. An important prerequisite to ensure proper bone-implant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lastinsthetics and dental implants is essential a firm and lasting cant interface cess in prosthetics and dental implants is essential a firm and lasting cant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lasting tal implants is essential a firm and lasting connecg cant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lasting cant interface cess in prosthetics and dental implants is essential a firm and lasting cant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lasting tal implants is essential a firm and lasting connection to the implant surface and bone. These surfaces can be modified using coatings, different abrasive blasting, or acid treatments, combination of several or all of them


Assuntos
Humanos , Clareamento Dental/métodos , Clareadores Dentários/análise , Descoloração de Dente/terapia , Descoloração de Dente/etiologia , Nicotina/efeitos adversos , Furaldeído/efeitos adversos , Peróxido de Hidrogênio/uso terapêutico
16.
Clin Oral Investig ; 22(9): 3043-3051, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29468599

RESUMO

OBJECTIVES: The objective of this study was to evaluate the dental color exposed to acute cigarette smoke treatment and quantify the amount of nicotine in samples exposed to cigarette smoke, after dental prophylaxis and after in-office bleaching. MATERIALS AND METHODS: Sixty-nine healthy human molars were subjected to cigarette smoke in a cigarette machine. The teeth were divided into three groups: positive control, prophylaxis, and bleaching. Forty cycles of smoke exposition with duration of 15 min each were performed using 10 cigarettes (positive control). Dental prophylaxis was performed with a rotating brush and prophylaxis paste; in-office bleaching was performed with 35% hydrogen peroxide, in two sessions of three 15-min applications, with a 1-week interval between sessions. The color was evaluated at the baseline, after exposure to cigarette smoke, after dental prophylaxis, and after in-office bleaching. Teeth from each group were powdered and analyzed by gas chromatography-mass spectrometry in order to measure the amount of nicotine present in each group. Data from quantification of nicotine and color change were analyzed by one-way ANOVA and Tukey's test (α = 0.05). Data for subjective and objective color evaluation, a perceptible dental darkening occurred in teeth after exposure to cigarette smoke. Dental prophylaxis was able to recover the original color of teeth however, only after bleaching teeth became whiter than at the baseline (p < 0.001). The amount of nicotine was significantly different and higher in positive control group (3.3 ± 1.3 µg/g of tooth), followed by the prophylaxis group (2.1 ± 1.4 µg/g) and the bleaching group (0.8 ± 0.3 µg/g) (p < 0.001). CONCLUSIONS: Cigarette smoke penetrates into the dental structure. Dental prophylaxis and bleaching with 35% hydrogen peroxide can partially remove the nicotine from tobacco smoke. However, when in-office bleaching was applied, a more significant nicotine removal was achieved. CLINICAL SIGNIFICANCE: Dental prophylaxis could remove most of the external nicotine-staining on the tooth surfaces while bleaching could further reduce the external and internal nicotine-staining of teeth.


Assuntos
Profilaxia Dentária , Nicotina/análise , Fumar , Clareamento Dental , Descoloração de Dente/terapia , Cromatografia Gasosa-Espectrometria de Massas , Humanos , Técnicas In Vitro , Dente Molar
17.
Minerva Stomatol ; 67(2): 55-61, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-29446268

RESUMO

BACKGROUND: This paper aimed to compare the tooth color changes and sensitivity in patients undergoing dental bleaching with 10% hydrogen peroxide using customized trays or strips as delivering systems. METHODS: A total of 50 patients aged between 18-30 years old were assigned into two groups (N.=25) according to the bleaching treatment: tray (TB) or strips (SB). For both techniques, the patients underwent a 30-minute application of 10% hydrogen peroxide twice a day for seven days. Tooth color was evaluated before, 3 and 7 days of treatment, and 14 days after bleaching using a tooth color shade guide (VITA® shade). Tooth sensitivity was assessed using the Visual Analogue Scale (VAS). The values obtained from the color changes and tooth sensitivity were statistically analyzed (α=5%). RESULTS: For both groups, there was a significant difference on the tooth color before and after bleaching (P<0.001), although there was no significant difference between them (P=0.4215). The SB group exhibited a lower frequency of sensitivity (50.2%) compared to the TB group (70.2%) (P<0.001). However, the highest number of individuals reporting score 1 of sensitivity was found in the SB group (37.3%) compared to the TB group (20.9%) (P<0.001). For the other scores, there were no differences between the SB and TB groups, with results of 9.8% and 8.4% for score 2 (P=0.744) and 2.7% and 0.5% for score 3 (P=0.122). CONCLUSIONS: The bleaching effect of 10% hydrogen peroxide is not influenced by the delivering system (tray or strips). Even though the technique with strips was associated to a lower frequency of dental sensitivity, the peak level of pain was greater when compared to the technique using trays.


Assuntos
Esmalte Dentário/efeitos dos fármacos , Peróxido de Hidrogênio/farmacologia , Clareadores Dentários/farmacologia , Clareamento Dental/instrumentação , Descoloração de Dente/terapia , Odontalgia/etiologia , Adolescente , Adulto , Cor , Colorimetria , Feminino , Humanos , Peróxido de Hidrogênio/administração & dosagem , Masculino , Pressão , Clareamento Dental/efeitos adversos , Clareamento Dental/métodos , Clareadores Dentários/administração & dosagem , Clareadores Dentários/efeitos adversos , Escala Visual Analógica , Adulto Jovem
18.
Oper Dent ; 43(2): 113-120, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29148913

RESUMO

The restoration of single discolored maxillary anterior teeth is still a difficult task, as not only shape and surface characterization play an important role in the success of the treatment, but the propagation of light throughout the restorative material does as well. In some cases, small changes in morphology, color, and brightness will be noticeable. These factors are sometimes very tricky, and shade guides alone are difficult to use for color selection. This article proposes a protocol of employing cross-polarization imaging for improving the accuracy of the shade selection of resin composites. The step-by-step technique is presented for the restoration of a single discolored tooth.


Assuntos
Resinas Compostas/química , Restauração Dentária Permanente , Fotografação/métodos , Pigmentação em Prótese , Descoloração de Dente/terapia , Adulto , Estética Dentária , Feminino , Humanos , Incisivo , Maxila , Clareamento Dental
19.
J Dent ; 68: 91-97, 2018 01.
Artigo em Inglês | MEDLINE | ID: mdl-29169968

RESUMO

OBJECTIVE: This randomized double-blind clinical trial compared tooth sensitivity (TS), bleaching efficacy, and cytokine levels after applying in-office bleaching treatments containing 15% and 35% hydrogen peroxide (HP15% and HP35%, respectively). METHODS: Twenty-five volunteers were randomly assigned to receive HP15% or HP35% treatment. The bleaching agent was applied in three 15-min applications per session. Two bleaching sessions were separated by a 1-week interval. The participants scored TS using a visual analog scale and numerical rating scale. Bleaching efficacy was determined by subjective and objective methods. Gingival crevicular fluid was collected from three jaws sites per patient for the analysis of fluid volume. Flow cytometry was used to analyze gingival crevicular fluid levels of interleukin (IL)-1ß, IL-2, IL-4, IL-6, IL-10, tumor necrosis factor, and interferon-gamma. All measurements were obtained before and after bleaching. All data were statistically analyzed (α=0.05). RESULTS: The absolute risk and intensity of TS was higher for HP35% than for HP15% (p>0.002). One month post-bleaching, HP35% produced more bleaching than HP15% (p=0.02). However patient perception (p=0.06) and patient satisfaction (p=0.53) with regard to bleaching were not significantly different. No significant differences existed in the gingival fluid volume (p>0.38) or in any cytokine level (p>0.05) for either HP concentration. CONCLUSION: Treatment: with HP35% is more effective than HP15%, but generates a greater risk and intensity of TS. No inflammatory changes occurred despite the difference in the HP concentrations. CLINICAL SIGNIFICANCE: Hydrogen peroxide at a lower concentration (e.g., 15%) should be considered a good treatment alternative for in-office bleaching because the higher concentration for in-office bleaching generates a greater risk and intensity of TS for patients.


Assuntos
Sensibilidade da Dentina/etiologia , Líquido do Sulco Gengival/química , Peróxido de Hidrogênio/efeitos adversos , Clareadores Dentários/efeitos adversos , Clareamento Dental/efeitos adversos , Adolescente , Adulto , Análise de Variância , Citocinas/análise , Método Duplo-Cego , Gengiva/efeitos dos fármacos , Humanos , Peróxido de Hidrogênio/administração & dosagem , Luz/efeitos adversos , Satisfação do Paciente , Clareadores Dentários/administração & dosagem , Descoloração de Dente/terapia , Resultado do Tratamento , Escala Visual Analógica , Voluntários , Adulto Jovem
20.
Artigo em Inglês | MEDLINE | ID: mdl-29240213

RESUMO

Dental therapy of traumatically ankylosed maxillary anterior teeth with an additional slight root resorption represents a great challenge for the restorative team and requires intensive planning and communication between patient, dentist, orthodontist, periodontist, and dental technician. The inhibition of vertical growth often makes dental intervention indispensable. Porcelain laminate veneers have been successfully used for more than two decades, mainly on anterior teeth, and was the minimally invasive treatment option for the present case report. Preprosthetic planning with a digital approach of the width-length ratio and the red-white esthetics were important prerequisites for a satisfactory treatment result. The treatment goal was clarified using a wax-up and a corresponding template for intraoral verification with a mock-up. The template also served as a preparation guide. Despite all risk factors, including the endodontic treatment, the 3-mm intruded position, and the slight root resorption, the patient and the restorative team decided to restore the situation with two feldspathic-ceramic veneers to provide an esthetic, time-saving, nonsurgical process for the patient.


Assuntos
Cerâmica , Facetas Dentárias , Incisivo/lesões , Anquilose Dental/terapia , Descoloração de Dente/terapia , Traumatismos Dentários/terapia , Adulto , Humanos , Masculino , Anquilose Dental/complicações , Descoloração de Dente/complicações , Traumatismos Dentários/complicações
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA