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1.
Oral Health Prev Dent ; 18(1): 53-59, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32051971

RESUMO

PURPOSE: To investigate dental enamel wear caused by erosion and abrasion while using a combination of anti-erosive toothbrush/-paste. MATERIALS AND METHODS: A total of 60 enamel specimens from bovine incisors were randomly assigned into five groups of 12 specimens each (G1-5, n = 12): (G1) control group (no treatment), (G2) standard medium toothbrush Paro M43 and standard toothpaste Elmex Caries Protection, (G3) standard medium toothbrush Paro M43 and anti-erosive toothpaste Elmex Protection Erosion, (G4) anti-erosive toothbrush Elmex Erosion Soft and standard toothpaste Elmex Caries Protection, (G5) anti-erosive toothbrush Elmex Erosion Soft and anti-erosive toothpaste Elmex Protection Erosion. Initially, surface baseline profiles were recorded using profilometry. In a total of 60 cycles, all specimens were exposed to hydrochloric acid (pH = 3) for 1 min, rinsed with tap water to stop the erosive attack and brushed according to the specific protocol of each group (15 brushing strokes per run). Enamel loss was determined by comparing the surface profiles before and after 60 cycles and the results were statistically analysed using analysis of variance (ANOVA). RESULTS: The significantly highest loss of enamel was observed in the control group G1(1.4 ± 0.20 µm) (p < 0.001). G2 turned out to be the most abrasive toothbrush/-paste combination (1.12 ± 0.15 µm), G3 the least invasive (0.40 ± 0.04 µm) (p < 0.001, respectively). CONCLUSION: All combinations of the investigated toothbrushes/-pastes reduce erosive/abrasive enamel wear. However, the highest reduction was observed for the combination of anti-erosive toothpaste and standard toothbrush (G3).


Assuntos
Abrasão Dentária , Erosão Dentária , Animais , Bovinos , Esmalte Dentário , Escovação Dentária , Cremes Dentais
2.
Am J Dent ; 33(1): 12-16, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-32056409

RESUMO

PURPOSE: To evaluate the in vitro effects of commercially available charcoal dentifrices on Streptococcus mutans biofilm development and their ability to prevent enamel demineralization. METHODS: Streptococcus mutans biofilm was formed on polished bovine enamel specimens (n= 9 per treatment), and treated twice-daily for 120 seconds over the course of 5 days with: charcoal dentifrice containing fluoride (1,000 ppm F) (CF+), fluoride-free charcoal dentifrice (CF-), regular fluoride (1,100 ppm F) dentifrice (F+ ), or regular fluoride-free dentifrice (F-). Chlorhexidine (CHX, 0.12%) and deionized water (DIW) were used as positive and negative controls, respectively. Biofilms were analyzed for bacterial viability (colony-forming units, CFU). The pH of the medium was measured daily. Enamel specimens were analyzed using Vickers microhardness ( HV) and transversal microradiography (TMR). Data were analyzed using one-way ANOVA followed by post-hoc tests (α= 0.05). RESULTS: F+ showed higher pH values than CF+ and CF-, and CF- presented higher pH than CF+, showing that CF+ did not have inhibitory effects on the acidogenicity of cariogenic biofilms. CFU was significantly decreased when specimens were treated with CF+, CF- and F+, compared to specimens treated with DIW (P≤ 0.035) or F- (P≤ 0.001), respectively. However, the reduction observed was minimal (approximately 1 log). CF+ and CF- were less effective than F+ in preventing enamel demineralization as determined using HV (P= 0.041 and P= 0.003, respectively) and TMR ( P≤ 0.001). Both charcoal dentifrices (CF+, CF-) did not show relevant inhibition of S. mutans biofilm growth. Additionally, neither product prevented enamel demineralization compared to a regular fluoride-containing dentifrice. CLINICAL SIGNIFICANCE: The tested charcoal dentifrices did not exhibit anticaries potential.


Assuntos
Dentifrícios , Desmineralização do Dente , Animais , Biofilmes , Cariostáticos , Bovinos , Carvão Vegetal , Esmalte Dentário , Fluoretos , Fluoreto de Sódio , Streptococcus mutans , Remineralização Dentária
3.
Am J Dent ; 33(1): 25-28, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-32056411

RESUMO

PURPOSE: To evaluate the effect of different electrical brushing systems on the surface roughness and wear profile of the enamel of sound primary teeth and teeth with induced white spot lesions. METHODS: 45 specimens were obtained from sound primary incisors, and the buccal surface was divided into four parts: sound enamel; enamel with white spot lesions; sound enamel with brushing; and enamel with white spot lesions and brushing. Specimens were randomly divided into three groups (n =15), according to the different brushing systems: Group 1 - Electric rotating toothbrush (Kid's Power Toothbrush - Oral B); Group 2 - Sonic electric toothbrush (Baby Sonic Toothbrush); and Group 3 - Manual toothbrush (Curaprox infantil) (control). The specimens were analyzed for surface roughness and wear profile. Data were analyzed by appropriate statistical tests, with a significance level of 5%. RESULTS: Regarding the surface roughness, no significant difference was observed between the groups. However, with respect to the wear profile, Group 1 caused significantly higher wear in the sound tooth enamel and in the presence of white spot lesions, in comparison to the other brushing systems (2 and 3) (P< 0.05), which did not cause wear. Manual and electric brushing (rotational and sonic) did not increase surface roughness in primary tooth enamel. However, the electric rotational brushing caused significant wear of the sound and demineralized enamel surface of primary teeth. CLINICAL SIGNIFICANCE: None of the toothbrushing systems tested caused significant alterations on sound dental enamel. However, rotational toothbrushing on enamel of primary teeth with white spot lesion increased wear.


Assuntos
Cárie Dentária , Escovação Dentária , Esmalte Dentário , Eletricidade , Humanos , Dente Decíduo
4.
Am J Dent ; 33(1): 29-32, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-32056412

RESUMO

PURPOSE: To assess the association between obstructive sleep apnea (OSA) and enamel cracks. METHODS: 219 patients were included. Separate operators assessed the sleep component of the study and the visual evaluation of the enamel cracks. Anthropometric data were also obtained. RESULTS: Patients with slightly marked (superficial) enamel cracks had a significantly lower apnea-hypoapnea index (AHI) than the patients with moderately-to-severely marked (deep) craze lines. The frequency of patients with moderately-to-severely marked craze lines increased with the severity of OSA. Spearman's correlation indicated the presence of a statistically significant association between the severity of enamel crack and the severity of OSA. Multiple regression analysis indicated that age, sex, body mass index and OSA significantly affected the enamel cracks. Compared to patients with slightly marked craze lines, those with moderate-to-severe craze lines are higher aged males, with a higher body mass index and increased severity of OSA. CLINICAL SIGNIFICANCE: The presence of moderate to severe enamel cracks may alert the clinician to the need to diagnose obstructive sleep apnea.


Assuntos
Apneia Obstrutiva do Sono , Índice de Massa Corporal , Esmalte Dentário , Humanos , Masculino , Polissonografia
5.
Am J Dent ; 33(1): 43-47, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-32056415

RESUMO

PURPOSE: To investigate the effect of acid etchants with different low concentrations on remineralization of white spot lesion (WSL). METHODS: WSL were prepared on buccal surfaces of 100 intact premolars using the methyl cellulose gel/lactic acid method. The samples were then placed in a remineralizing solution in addition to fluoride application twice daily for 5 minutes. The changes were quantified weekly using the Quantitative Light-induced Fluorescence (QLF) system. When changes in fluorescence radiance approached zero, each sample was etched with one of the following acids; 5% phosphoric acid, 10% phosphoric acid, 5% polyacrylic acid or 10% polyacrylic acid for 15 seconds, washed, dried, and placed again in the remineralizing solution. Two samples were randomly selected from each group for transverse microradiography (TMR) and scanning electron microscopy (SEM) analysis. RESULTS: The 10% polyacrylic acid group showed the most significant improvement in fluorescence gain over the second phase of remineralization. It also showed partial loss of surface minerals without affecting enamel thickness as the phosphoric acid did. Additionally, 10% polyacrylic acid created the largest number of pores and smallest in size when compared to phosphoric acid, thus enhancing remineralization more efficiently than phosphoric acid without compromising the enamel outermost layer. CLINICAL SIGNIFICANCE: The findings of this study may improve the remineralization of WSL from the bottom of the lesion instead of precipitation on the outermost layer of the lesion leaving a better quality of enamel. 10% polyacrylic acid enhanced remineralization more efficiently than phosphoric acid without compromising the enamel outermost layer.


Assuntos
Cárie Dentária , Remineralização Dentária , Esmalte Dentário , Fluoretos , Humanos , Microrradiografia
6.
J Adhes Dent ; 22(1): 99-105, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32030380

RESUMO

PURPOSE: To use shear bond strength (SBS) and shear fatigue strength (SFS) testing to determine the durability of adhesion of self-adhesive restorative materials compared to composite resin bonded with a universal adhesive. MATERIALS AND METHODS: A universal adhesive, Prime & Bond Active, was used in self-etch mode to bond Z-100 composite resin to enamel and dentin. Three commercially available restorative materials and one experimental material with self-adhesive properties, Activa (A), Fuji II LC(F), and Equia Forte (E) and ASAR-MP4 (S) were also bonded to enamel and dentin. The SBS and SFS were determined for all materials. A staircase method was used to determine the SFS with 10 Hz frequency for 50,000 cycles or until failure occurred. RESULTS: On enamel, S generated similar values to the adhesive/composite materials and higher values than F, E, and A. On dentin, the composite/universal adhesive showed significantly higher SBS and SFS than the self-adhesive materials. S, F, and E generated higher values than A on dentin. CONCLUSION: SBS and SFS values to enamel were similar for all materials tested except Activa which generated lower enamel values. On dentin surfaces, the self-adhesive materials generated similar SBS and SFS, with the exception of Activa. Those values were lower than that generated with composite resin and a universal adhesive.


Assuntos
Colagem Dentária , Adesivos Dentinários , Ataque Ácido Dentário , Cimentos Dentários , Esmalte Dentário , Análise do Estresse Dentário , Dentina , Teste de Materiais , Cimentos de Resina , Resistência ao Cisalhamento
7.
J Clin Pediatr Dent ; 44(1): 47-51, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31995417

RESUMO

Objective: The present study compared the mineral contents of enamel and dentin of primary teeth from children exposed to desalinated water with those from children drinking ground water. Study design: The study comprised of two groups of teeth, seven primary teeth from children living in areas supplied exclusively with desalinated water and seven primary teeth from children that have been exposed solely to ground water from in-utero until the teeth were either extracted or naturally shed. Mineral content of three tooth regions was determined by scanning electron microscopy with an energy dispersive X-ray spectrometer (EDS). The main ion content of each region was calculated. Results: Children exposed to ground water presented higher levels of magnesium in pre- and post- natal enamel than children living in areas supplied exclusively with desalinated water but without significant differences. The same was found for calcium levels. Excluding post-natal enamel calcium level (of borderline statistical significance), no significant differences were found in magnesium and calcium levels of primary teeth enamel and dentin of children exposed to desalinated water in comparison to children exposed to ground water. Conclusion: Mineral content of enamel and dentin in primary teeth is not affected by consuming desalinated water.


Assuntos
Cálcio , Magnésio , Criança , Esmalte Dentário , Dentina , Humanos , Minerais , Dente Decíduo
8.
J Clin Pediatr Dent ; 44(1): 35-40, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31995419

RESUMO

Purpose: Recent studies have suggested that disruptions in the RANKL/RANK/OPG system might be involved in enamel conditions. The aim of this study was to test whether genetic polymorphisms in RANK, RANKL and OPG are associated with dental caries, developmental defects of enamel (DDE) and enamel microhardness. Study design: Saliva samples were collected from two subsets for the purpose of genomic DNA extraction. In the first subset, composed of 248 children, dental caries and DDE were evaluated during their clinical examination. In the second subset, composed of 72 children, enamel samples from the buccal surface of primary teeth were used for enamel microhardness analysis. Genetic polymorphisms in RANK, RANKL and OPG were genotyped by real-time polymerase chain reactions in all samples from both populations. The chi-square test was used for dental caries and DDE analysis while, one-way ANOVA with Tukey's post-test was used for microhardness analysis. Hardy-Weinberg equilibrium was also calculated. The established alpha was 5%. Results: Caries experience analysis demonstrated a statistically-significant difference for OPG allele distribution in primary dentition (p=0.033). The studied polymorphisms in RANK, RANKL and OPG were not associated with DDE or enamel microhardness (p>0.05). Conclusion: The genetic polymorphism rs2073618 in OPG is associated with dental caries experience in primary dentition.


Assuntos
Cárie Dentária , Hipoplasia do Esmalte Dentário , Criança , Esmalte Dentário , Humanos , Polimorfismo Genético , Dente Decíduo
9.
J Clin Pediatr Dent ; 44(1): 20-27, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31995422

RESUMO

Purpose: Molar Incisor Hypomineralization (MIH) is a developmental enamel anomaly of systemic origin affecting the first permanent molars and often the permanent incisors. Despite MIH being a prevalent anomaly, its diagnosis and management are challenging for practitioners; including poor anesthesia, failure of restorations, rapid enamel breakdown, poor resin adhesion, and related child anxiety. This study aimed to evaluate knowledge regarding and management of MIH amongst orthodontists and dentists. Study design: The study was performed from March to September 2017 and included 336 dentists and 32 orthodontists. Questionnaires comprised questions on MIH diagnosis, socio-demographic characteristics of the subjects, and photographs of a case of MIH with related questions regarding management. Results: Our results showed that 48% of dentists and 25% of orthodontists misdiagnosed MIH; with misdiagnosis associated with graduation prior to 1986 (p < 0.001). Amongst dentists, 59% applied a fluoridated product and 34% applied fissure sealants in the case of moderate MIH. The application of fluoride was associated with graduation after 1986 (p < 0.0001).Conclusion: Large disparities about knowledge and management of MIH exist between dental practitioners in France. Education regarding diagnosis and management of MIH is necessary.


Assuntos
Hipoplasia do Esmalte Dentário , Ortodontistas , Criança , Esmalte Dentário , Odontólogos , Humanos , Dente Molar , Prevalência
10.
J Oral Sci ; 62(1): 103-106, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31996511

RESUMO

This study aims to evaluate the effect of mouth rinses on the color, microhardness, and surface roughness of tooth enamel. Sixty dental blocks were collected from human third molars and divided in five groups (n = 12): the control group (CG) without immersion in mouth rinse, Listerine Zero, Colgate Plax Fresh Mint, Listerine Whitening, and Colgate Luminous White. The groups were subjected to initial color analysis; the microhardness and roughness of the enamel surfaces were evaluated. Next, the samples were subjected to immersion in mouth rinses or brushing with conventional fluoride toothpaste (CG) according to the manufacturer's instructions; after a 12-week treatment, the color, microhardness, and roughness were once again assessed and compared with the initial analysis. Data were tabulated and analyzed through a two-way analysis of variance (ANOVA) (color and roughness) followed by Tukey's test. Microhardness was analyzed through the Kruskal-Wallis test followed by Dunn's test; the level of significance was 5%. All groups immersed in mouth rinses had a higher level of microhardness loss than CG; additionally, all groups showed changes in the enamel surface. Enamel surface loss was observed using a roughness test, and the mouth rinses promoted a higher level of color changes than CG. Given the results, it can be concluded that the mouth rinses led to significant changes in tooth enamel.


Assuntos
Clareamento Dental , Dente , Esmalte Dentário , Humanos , Antissépticos Bucais , Cremes Dentais
11.
Monogr Oral Sci ; 28: 77-90, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31940625

RESUMO

Milk is an important part of the human diet; after weaning, cow's milk (bovine milk) predominates and this chapter considers the effect of bovine milk on dental caries. Yoghurt, which is a milk product, is also considered here. Several published reviews have concluded that milk is of very low cariogenicity and may have some caries protective potential. For example, WHO reviewed the strength of the evidence in 2003 and concluded that a "decreased risk" of dental caries from milk was "possible." The evidence comes from several types of study: epidemiological studies (interventional and observational), animal experiments, plaque pH studies, and in vivo and in vitro enamel and dentine slab experiments. More recent observational epidemiological studies have adjusted for potential confounders and have reported that milk consumption is associated with lower caries experience or incidence. Other types of study generally support this conclusion. Reasons for these favourable caries-related properties include the lower acidogenicity of lactose compared with other dietary sugars and the protective effects of calcium, phosphate, proteins, and fats. There is less research concerning yoghurts but it is likely that the cariogenic potential of plain yoghurt is similar to that of milk. The addition of sucrose to milk increases caries risk.


Assuntos
Cárie Dentária , Animais , Bovinos , Esmalte Dentário , Feminino , Humanos , Leite , Streptococcus mutans , Iogurte
12.
Monogr Oral Sci ; 28: 32-47, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31940644

RESUMO

Microelements are essential components of the diet. This chapter describes the effect of several such elements: zinc, copper, iron, tin, and iodine, on oral health. As part of normal diets, these elements have limited associations with specific oral conditions. This is partly because of their presence at relatively low concentrations and partly because they are most often present as mixtures where the effect of any one element is confounded by others. Deficiencies in microelements can cause health problems. Hence supplements, often containing one or more microelements, are prescribed to combat such conditions. All these ions exhibit antibacterial properties. Such effects are invariably small at the concentrations found in conventional foods and drinks. However, at higher concentrations, these ions can inhibit acid production by plaque bacteria involved in dental caries. Of more importance, zinc and tin have potentially significant effects on the de- and remineralisation processes involved in dental caries. Indeed, both elements have been included in oral hygiene products such as toothpastes for many years. Zinc, in particular, has demonstrated not only the ability to reduce dissolution rates of enamel and hydroxyapatite but also to inhibit calculus formation. Tin can also markedly reduce the dissolution rates. Both Cu and Fe have demonstrated anti-caries effects in animal models, whilst Fe-containing drinks have been shown to reduce enamel erosion in situ. The broad spectrum antibacterial properties of iodine have been promoted for its potential use against both early childhood caries and chronic periodontitis. However, more convincing clinical research is required to validate efficacy.


Assuntos
Cárie Dentária , Placa Dentária , Animais , Esmalte Dentário , Cremes Dentais , Zinco
13.
Braz Oral Res ; 33: e121, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31939500

RESUMO

The objective of the study was to analyze the surface area (SA) of the wear caused by simulated chewing on human enamel and opposing restorative material, namely: composite resin (CR), porcelain fused to metal (PFM), lithium disilicate (LD), or monolithic zirconia (MZr). Forty-eight premolars were selected as enamel specimens and divided randomly into 4 groups (n = 48; n =12) used as antagonists in chewing simulation (250,000 loading cycles) against one of the four selected test materials. Enamel and material specimens were scanned and evaluated under digital microscope, and wear SA (mm2) were recorded. Descriptive statistics, paired t-test, one-way ANOVA, and post-hoc Tukey-HSD tests were used for statistics (p < 0.05). The smallest and largest SA were exhibited by enamel against LD (0.80 mm2) and PFM (1.74 mm2), respectively. PFM (3.48 mm2) showed the largest SA and CR (2.28 mm2) showed the smallest SA. Paired t-test for SA values showed significant difference (p < 0.05) in all wear comparisons between materials and enamel antagonists. The wear of materials were greater than that of their respective enamel antagonists (p < 0.05). One-way ANOVA of the logarithmic means of wear SA revealed significant differences (P<0.05). Post-hoc Tukey test revealed significance for PFM (p < 0.05) with other materials. Wear of all test materials was greater compared to the wear of enamel antagonists. PFM and LD caused the largest and the smallest enamel wear, respectively. CR, LD, and MZr are more resistant than PFM to wear after simulated chewing against enamel.


Assuntos
Resinas Compostas/química , Esmalte Dentário/química , Porcelana Dentária/química , Mastigação , Ligas Metalo-Cerâmicas/química , Desgaste dos Dentes/etiologia , Zircônio/química , Adolescente , Adulto , Análise de Variância , Polimento Dentário/métodos , Humanos , Processamento de Imagem Assistida por Computador , Teste de Materiais , Microscopia/instrumentação , Valores de Referência , Estatísticas não Paramétricas , Propriedades de Superfície , Adulto Jovem
14.
Compend Contin Educ Dent ; 41(1): 42-49, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-31895580

RESUMO

Radiation therapy for patients with head and neck cancer can have damaging effects on oral health, including reduced salivary flow. In this case report, a 58-year-old patient had previously undergone radiation therapy for stage II squamous cell carcinoma of the larynx. Symptoms of xerostomia persisted, and her dentition suffered as a result. Problems included moderate to severe loss of tooth structure; erosive pitting lesions on the cusp tips of posterior teeth; and attrition throughout her dentition, particularly in the anterior. To achieve the esthetic, functional, and biomechanical goals of the case, treatment involved the use of both full-coverage, cohesively retained restorations and feldspathic veneers, depending on the amount of adequate enamel available for adhesion, along with limited orthodontic therapy. Additionally, the patient was instructed on how to stimulate salivary flow post-treatment.


Assuntos
Dentição , Neoplasias de Cabeça e Pescoço , Esmalte Dentário , Estética Dentária , Feminino , Humanos , Pessoa de Meia-Idade , Sobreviventes
15.
Arch Oral Biol ; 111: 104638, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-31901573

RESUMO

OBJECTIVE: The purpose of this study was to investigate the effects of Lemon essential oil (LEO) and Limonene (LIM) in the progress of early caries. DESIGN: LEO and LIM were selected as experimental medicine, while sodium fluoride (NaF) and deionized water (DW) were positive and blank controls, respectively. Bovine incisors were used to establish enamel and dentin early caries models by demineralization method in vitro. Then specimens were subjected to pH cycling. Calcium and phosphate release of demineralizing solution were measured by an automatic biochemical analyzer; Surface microhardness tester and energy dispersive X-ray spectrometer were used to detect the surface microhardness recovery and calcium- phosphate ratio on tooth surface; Degraded collagen matrix by collagenase was investigated by assaying hydroxyproline. RESULTS: Calcium release of dentin demineralizing solution of LEO group was lower than DW group's and higher than NaF group's. Both of LEO and LIM groups, the surface microhardness recovery were significantly lower than those of NaF group, which were similar to DW group. Dentin surface calcium- phosphate ratio of LEO and LIM groups were lower than those of NaF group and higher than those of DW group. Hydroxyproline concentration in the remineralizing solution of LEO and LIM groups were lower than DW groups' and higher than NaF groups'. CONCLUSIONS: LEO and LIM have influence on the progress of dentin early caries, which can stabilize its structure by inhibiting collagen degradation. Meanwhile, these medicines may provide a new drug choice for the prevention and treatment of early root caries.


Assuntos
Cariostáticos/farmacologia , Cárie Dentária , Esmalte Dentário/efeitos dos fármacos , Limoneno/farmacologia , Óleos Voláteis/farmacologia , Óleos Vegetais/farmacologia , Animais , Bovinos , Concentração de Íons de Hidrogênio , Fluoreto de Sódio/farmacologia , Desmineralização do Dente , Remineralização Dentária
16.
Int J Paediatr Dent ; 30(1): 27-34, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31583786

RESUMO

BACKGROUND: Molar incisor hypomineralization (MIH) is a developmental enamel defect characterized by well-demarcated discolorations frequently detected in molars, causing pain and esthetic alterations. AIM: To assess the interests of Google users on MIH-related information. DESIGN: Digital data were collected in Google Trends through two search strategies, 'molar incisor hypomineralization' (topic) and 'MIH' (search term), between January 2004 and November 2018. ARIMA models were applied to analyze trends of curves and to predict the activity of Google users during 12 months. Autocorrelation and partial autocorrelation (ACF/PACF) plots were used to detect trends in the variation of relative search volume (RSV) related to search strategies over time. The most popular queries were analyzed qualitatively, whereas geographical heat maps were retrieved to determine search volumes according to countries (P < .05). RESULTS: Gradual increasing trends were detected, with forecasts indicating similar levels of RSVs to the period between December 2017 and November 2018. Most popular queries and topics were associated with MIH diagnosis, being retrieved predominantly in European countries. CONCLUSIONS: The activity of Google users related to this condition is maintained low, with a reduced intensification over time, suggesting that the awareness on MIH is probably confined to dentists and affected people worldwide.


Assuntos
Hipoplasia do Esmalte Dentário , Incisivo , Esmalte Dentário , Humanos , Internet , Dente Molar , Prevalência
17.
Acta Odontol Scand ; 78(1): 6-12, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31267814

RESUMO

Aim: To describe the distribution of enamel-, dentin-, root- and secondary caries within an elderly population in Northern-Norway.Material and methods: A study population (n = 1 173) was divided into age groups: 65-69 (seniors), 70-74 (young elderly), 75-79 (elderly) and 80-94 (old elderly). Seven examiners registered presence, location and severity of caries lesions on x-rays and intra-oral photos. Severity of approximal, occlusal, secondary and root caries was graded (D1-2: into enamel; D3-5: into dentin, root caries), and decayed missing filled surfaces/teeth (DMFS/DMFT) were calculated. T-test, ANOVA and a Bonferroni correction were used.Results: The seniors had more primary caries (DS1-5) compared to the oldest age groups, while the old elderly had significantly more secondary caries than the other groups (p < .05). Of those ≥65 years 13.8% were affected with root caries, 21% among the oldest. About 48% of the old elderly had one or more surfaces with untreated caries lesions into dentin, while for the other groups the number was 35% (p < 0.05).Conclusion: Individuals seem to maintain good oral health up to at least 80 years of age. Those older than 80 years have more root caries needing more intensified caries-controlling measures and a higher prevalence of untreated dentin lesions often in need of operative treatment.


Assuntos
Esmalte Dentário , Idoso , Idoso de 80 Anos ou mais , Índice CPO , Cárie Dentária/epidemiologia , Esmalte Dentário/patologia , Dentina/patologia , Feminino , Humanos , Masculino , Noruega/epidemiologia , Prevalência
18.
Oper Dent ; 45(1): 80-91, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31226005

RESUMO

OBJECTIVE: The purpose of this study was to evaluate whether different enamel etching methods with reduced etching times would improve the bonding effectiveness of universal adhesives. METHODS AND MATERIALS: Three enamel etching methods, phosphoric acid ester monomer (PPM) etching, phosphoric acid (PPA) etching, and polyalkenoic acid (PLA) etching, and three universal adhesives, G-Premio Bond (GP), Prime&Bond elect (PE), and Scotchbond Universal Adhesive (SU), were evaluated. Initial bond strengths and fatigue strengths of universal adhesives to ground enamel and ground enamel etched for less than one, five, 10, and 15 seconds using different etching methods were determined. The bonded fatigue specimens were loaded using a sine wave at a frequency of 20 Hz for 50,000 cycles or until failure occurred with a staircase method. Atomic force micrograph (AFM) observations along with measurements of surface Ra roughness and modified surface area of enamel with different etching protocols were also conducted. RESULTS: The bond fatigue durability of universal adhesives to enamel with PPA etching from less than one to 15 seconds and PLA etching for 15 seconds was significantly higher than that to ground enamel. The bond fatigue durability to enamel with PPM etching was not increased compared with ground enamel. The surface Ra roughness and surface area obtained with AFM of enamel increased after PPA and PLA etching, and those values were significantly higher than those of ground enamel. Furthermore, surface Ra roughness and surface area with PPA etching were significantly higher than those with PLA etching. However, surface Ra roughness and surface area of enamel with PPM etching were similar to those of ground enamel regardless of etching time. CONCLUSION: PPA etching for less than one to 15 seconds and PLA etching for 15 seconds improve universal adhesive bonding, surface Ra roughness, and surface area of enamel. However, PPM etching is not effective, regardless of etching time, in improving bonds strengths, increasing surface roughness, and increasing surface area.


Assuntos
Ataque Ácido Dentário , Colagem Dentária , Cimentos Dentários , Esmalte Dentário , Teste de Materiais , Ácidos Fosfóricos , Cimentos de Resina , Resistência ao Cisalhamento , Propriedades de Superfície
19.
Int J Paediatr Dent ; 30(1): 11-17, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31464021

RESUMO

BACKGROUND: Knowledge on the association between developmental enamel defects (DED) and early childhood caries (ECC) has importance for the drafting of prevention measures and oral healthcare planning. AIM: To compare the frequency of ECC in children with and without DED and verify their association with sociodemographic factors. DESIGN: This case-control study was carried out with Brazilian children aged one to five years. The case group made up of 98 children with ECC and the control group was made up of 98 children without ECC. DED were classified in diffuse opacity, demarcated opacity and enamel hypoplasia (Developmental Defects of Enamel Index). Sociodemographic data were collected by a questionnaire answered by parents. Statistical analysis used McNemar's test and logistic regression analyses. RESULTS: In the bivariate analysis, ECC was more frequent among children from families with poorer socioeconomic conditions (lower monthly household income [P ≤ .001] and lower maternal schooling [P = .001]) and among those with DED (P ≤ .001). The final logistical model showed that children with DED (OR: 1.94) and a monthly household income less than two Brazilian minimum salaries (OR: 2.24) were more likely to have ECC. CONCLUSIONS: The occurrence of DED and lower household income were pre-disposing factors for the occurrence of ECC.


Assuntos
Cárie Dentária , Brasil , Estudos de Casos e Controles , Criança , Pré-Escolar , Estudos Transversais , Índice CPO , Esmalte Dentário , Humanos , Lactente , Prevalência
20.
Oper Dent ; 45(1): 10-18, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31373889

RESUMO

Pronounced white color alterations due to structural anomalies of the enamel are often insufficiently masked by bleaching techniques or resin infiltration procedures alone. This frequently leads to the choice of more invasive prosthetic restorations in order to correct tooth color and form. This article describes a minimally invasive treatment option for esthetic and functional rehabilitation in the case of a 13-year-old female patient with suspected severe fluorosis and misalignment of the anterior teeth. The restorations were performed using underlying resin infiltration to homogenize the tooth shade. In a second step, direct composite veneers were applied on top to attain a natural tooth color and adjust tooth alignment and form. By joining the two minimally and noninvasive techniques, this treatment option combines the directive for preservation of hard tooth structure while treating adolescents with the benefits of easy adaptation and repair when the occlusion is still in adjustment.


Assuntos
Fluorose Dentária , Clareamento Dental , Adolescente , Cor , Resinas Compostas , Esmalte Dentário , Facetas Dentárias , Estética Dentária , Feminino , Seguimentos , Humanos
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