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1.
J Clin Pediatr Dent ; 44(6): 429-435, 2020 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-33378467

RESUMO

OBJECTIVES: To compare the prevalence of parafunctional habits, erosive tooth wear and occurrence of tooth injuries among children being under the care of Social Welfare Centre and children treated in the Department of Children's Dentistry of the Medical University of Warsaw. STUDY DESIGN: The study contains environmental and medical interviews, record-based analysis and clinical examination. Parafunctional habits were rated on the base of dental interviews and clinical examinations. The occlusal surfaces were evaluated by visual examination using modified tooth wear index (TWI). Tooth injuries were reported from a medical interview labeled using Andreasen classification. The consent of the bioethics committee and guardians of children participated in the study was obtained. RESULTS: The study involved 782 patients, including 404 children from dysfunctional families (average age 11,4 ± 3,7) and 378 from ordinary families-control group (8,53 ± 3,92). In the study group we observed higher prevalence of erosive tooth wear (44,66% vs 18,02% p=0,000), dental trauma (9,4% vs 3,44% p=0,001) and a presence of parafunctional habits (67,8% vs 20,4 % p=0,000). CONCLUSION: The occurrence of parafunctional habits, erosive tooth wear and tooth injuries may be an indicator of domestic violence and a component of maltreated child syndrome.


Assuntos
Violência Doméstica , Erosão Dentária , Traumatismos Dentários , Desgaste dos Dentes , Adolescente , Criança , Hábitos , Humanos , Prevalência , Erosão Dentária/epidemiologia , Erosão Dentária/etiologia , Traumatismos Dentários/epidemiologia , Desgaste dos Dentes/epidemiologia , Desgaste dos Dentes/etiologia
2.
Clin Oral Investig ; 24(12): 4169-4183, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33052542

RESUMO

OBJECTIVE: Controversy exists regarding the effectiveness of delayed toothbrushing in decreasing erosive tooth wear (ETW). The purpose of this systematic review and meta-analysis was to assess the effects of delayed toothbrushing on ETW. MATERIALS AND METHODS: This systematic review and meta-analysis was conducted according to the PRISMA statement and registered in PROSPERO (CRD42020200463). PubMed, Embase, and Web of Science databases were systematically searched with no publication year limits. Screening and data extraction were performed independently by two reviewers. In situ and in vitro studies comparing ETW after delayed and immediate toothbrushing following an erosive attack were included. Review Manager software 5.3 (The Cochrane Collaboration, Oxford, UK) was used for statistical analyses. Heterogeneity was assessed with the Cochran Q test and I2 statistics. RESULTS: Of the 565 potentially relevant studies, 26 full-text articles were assessed for eligibility. Twelve articles were included in the systematic review, and 11 were included in the qualitative analyses. No significant difference in the ETW of human enamel was observed between delayed and immediate toothbrushing (P = 0.13), whereas significantly less ETW of bovine enamel was observed after delayed toothbrushing (P < 0.001). No significant difference in the ETW of bovine dentin was observed between delayed and immediate toothbrushing (P = 0.34). Studies on human dentin were not available. Subgroup analyses revealed a significant contribution of the use of fluoridated toothpaste to decreasing the ETW of human enamel after erosion and toothbrush abrasion (P = 0.02). CONCLUSIONS: Bovine and human teeth behaved differently in response to erosion and toothbrush abrasion. Delayed toothbrushing after an erosive attack was not effective at decreasing the ETW of human enamel compared to immediate toothbrushing, whereas it was effective at decreasing the ETW of bovine enamel. CLINICAL RELEVANCE: Delayed toothbrushing alone after the consumption of erosive foodstuffs or beverages is not capable of preventing erosive enamel wear.


Assuntos
Abrasão Dentária , Erosão Dentária , Desgaste dos Dentes , Animais , Bebidas , Bovinos , Esmalte Dentário , Humanos , Abrasão Dentária/etiologia , Abrasão Dentária/prevenção & controle , Erosão Dentária/prevenção & controle , Desgaste dos Dentes/prevenção & controle , Escovação Dentária
3.
Wiad Lek ; 73(8): 1677-1680, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33055333

RESUMO

OBJECTIVE: The aim of this study was to compare the wear resistance of such restorative materials as composite resin, feldspathic ceramic, leucite glass ceramic with intact enamel and to draw an analogy with some similar researches. PATIENTS AND METHODS: Materials and methods: In this research 20 extracted human teeth (maxillary incisors) without fillings and carious cavities were used as samples. All samples were disinfected and stored in saline in order to prevent dehydration. Teeth roots were cut off for the measure of fixation on an organic glass plate using chemically polymerizable resin. If necessary, the teeth were also cut on their lateral sides in order to give them equal size. The samples were placed in a frame-holder, located on the lever of the machine MI-2, which determines abrasion resistance under slipping. RESULTS: Results: The research has revealed that the average wear resistance of natural teeth was 122,67±4.9 J/mm3 (Tab 1). The archived result overcomes dental composite resin twice more (62.8±1.21 J/mm3), feldspathic ceramic 6.5 times more (16.32±1.2 J/mm3) and leucite ceramic over the half (73.79±3.12 J/mm3). CONCLUSION: Conclusion: Thus, according to this performed research and the analysis of the relative literature sources it can be stated that dental composite resin and leucite ceramics may be proposed as the materials of choice for anterior restoration of teeth. They have shown the good wear resistance and tolerance to antagonizing natural teeth.


Assuntos
Resinas Compostas , Desgaste dos Dentes , Cerâmica , Humanos
4.
Nat Commun ; 11(1): 5293, 2020 10 28.
Artigo em Inglês | MEDLINE | ID: mdl-33116130

RESUMO

Pterosaurs, the first vertebrates to evolve active flight, lived between 210 and 66 million years ago. They were important components of Mesozoic ecosystems, and reconstructing pterosaur diets is vital for understanding their origins, their roles within Mesozoic food webs and the impact of other flying vertebrates (i.e. birds) on their evolution. However, pterosaur dietary hypotheses are poorly constrained as most rely on morphological-functional analogies. Here we constrain the diets of 17 pterosaur genera by applying dental microwear texture analysis to the three-dimensional sub-micrometre scale tooth textures that formed during food consumption. We reveal broad patterns of dietary diversity (e.g. Dimorphodon as a vertebrate consumer; Austriadactylus as a consumer of 'hard' invertebrates) and direct evidence of sympatric niche partitioning (Rhamphorhynchus as a piscivore; Pterodactylus as a generalist invertebrate consumer). We propose that the ancestral pterosaur diet was dominated by invertebrates and later pterosaurs evolved into piscivores and carnivores, shifts that might reflect ecological displacements due to pterosaur-bird competition.


Assuntos
Fósseis/anatomia & histologia , Répteis/anatomia & histologia , Dente/anatomia & histologia , Animais , Evolução Biológica , Aves , Quirópteros/anatomia & histologia , Dieta/história , Dieta/veterinária , Ecossistema , Voo Animal , Fósseis/história , História Antiga , Répteis/classificação , Répteis/fisiologia , Desgaste dos Dentes/história , Desgaste dos Dentes/patologia
5.
Braz Oral Res ; 34: e115, 2020 Sep 04.
Artigo em Inglês | MEDLINE | ID: mdl-32901730

RESUMO

The aim of the present transversal study was to evaluate the clinical and biochemical salivary parameters of children with and without erosive tooth wear (ETW). The study population was children aged 4 to 9 years. A trained and calibrated examiner (kappa value for intraexaminer reliability = 0.89) classified the children into ETW (n = 24) and control groups (n = 24), and applied the O'Brien index. The salivary flow rate was initially evaluated by stimulated sialometry (paraffin chewing). Afterwards, the collected saliva was submitted to biochemical analyses of pH, uric acid, total buffering capacity, ferric-reducing antioxidant power, reduced glutathione, calcium, and phosphorus. Among the ETW children, 20 (83%) had dental lesions restricted to enamel, and 4 (17%) presented lesions affecting both enamel and dentin. A statistically significant difference between the groups was obtained only for the pH values (t-test; p = 0.004), with averages of 7.31 and 7.56 for the control and the ETW groups, respectively. Considering the parameters evaluated in general, it is suggested that the salivary profile of children with ETW does not differ considerably from that of children without ETW. However, the pH mean value seems to be slightly higher in ETW children, but is still within the normal physiological range.


Assuntos
Desgaste dos Dentes , Cálcio , Criança , Pré-Escolar , Esmalte Dentário , Humanos , Saliva , Erosão Dentária
6.
J Prosthet Dent ; 124(6): 798.e1-798.e7, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-32981716

RESUMO

STATEMENT OF PROBLEM: A consensus on whether or how to treat eroded dentin to bond to composite resins is lacking. The role of gels containing chlorhexidine (CHX), epigallocatechin-3-gallate (EGCG), and proanthocyanidin (PAC) in controlling erosive wear progression needs to be evaluated for bonding. PURPOSE: The purpose of this in vitro study was to evaluate the effect of gels containing antiproteolytic agents (CHX or EGCG) or an antiproteolytic and also collagen crosslinking agent (PAC) to control tooth wear progression on the microtensile bond strength (µTBS) of an adhesive system plus a composite resin to simulated eroded dentin. MATERIAL AND METHODS: Superficial occlusal dentin surfaces obtained from sectioned third molars were ground with SiC paper (600-grit; 1 minute; N-normal dentin) or subsequently submitted to an initial erosive challenge (Coca-Cola; 5 minutes). They then received one of the following treatments: application of a placebo (P), a 0.12% CHX digluconate, an EGCG at 400 µM, or a 10% PAC gel (vehicle: hydroxyethylcellulose, propylene glycol, methylparaben, imidazolidinyl urea, and deionized water; active principle: as per the experimental groups when applicable) or no treatment (C: control). Initially demineralized dentin was also submitted to pH cycling (Coca-Cola; 5 minutes, 3×/day, 5 days) to simulate eroded dentin (E). After acid etching all the specimens, adhesive Adper Single Bond 2 was applied, and composite resin (Filtek Z350 XT) was placed. After 24 hours storage in distilled water at 37 °C, the specimens were sectioned into beams, and the µTBS was tested at 0.5 mm/minute. The µTBS values obtained were evaluated considering each tooth as an experimental unit, and 2-way ANOVA and the Tukey post hoc test for multiple comparisons were applied (α=.05). RESULTS: Immediate µTBS values for the eroded dentin were always lower than those for the normal dentin, irrespective of whether any of the gels were applied for wear control. CONCLUSIONS: CHX, EGCG, PAC, and placebo gels, applied after the initial demineralization and before the pH cycling to simulate the eroded dentin, had a similar effect on the µTBS of the adhesive system plus the composite resin to simulated eroded dentin when compared with nonapplication (control).


Assuntos
Colagem Dentária , Proantocianidinas , Desgaste dos Dentes , Catequina/análogos & derivados , Clorexidina , Resinas Compostas , Dentina , Adesivos Dentinários , Géis , Humanos , Teste de Materiais , Cimentos de Resina , Resistência à Tração
7.
Oral Health Prev Dent ; 18(1): 719-729, 2020 Sep 04.
Artigo em Inglês | MEDLINE | ID: mdl-32895655

RESUMO

PURPOSE: This study investigated the progression of incisal tooth wear clinically for 4-years, using various diagnostic methods. Effectiveness of occlusal splints (night guards) for patients with nocturnal bruxism was also evaluated. MATERIALS AND METHODS: Forty maxillary incisors from 10 patients with nocturnal bruxism were selected. Group 1 (n=5) wore occlusal splints for 6 months, whereas group 2 (n=5) didn't. Ultrasound, cast-model analysis (control), digital radiography, FluoreCam and colorimeter were used for measurements. Clinical progression of incisal wear monitored at baseline, 3, 6, 12, 24 and 48 months, respectively. RESULTS: Ultrasound, cast-model analysis and FluoreCam readings gradually and statistically significantly decreased during the overall evaluation period for both groups (p<0.001). Regarding colorimeter, statistically significant differences in periodical measurements were observed from 24 months and 12 months, for group 1 and group 2, respectively (p<0.001). There were no statistically significant differences in readings at evaluation periods, between the groups, for ultrasound, digital radiography and cast-model analysis (p≥0.05); however, statistically significant differences were observed for colorimeter at 24 months (p=0.010) and 48 months (p<0.001), and for FluoreCam at 12, 24, 48 months (p<0.001). Annual decrease in mean crown length was determined as 20-30 µm for group 1 and 40-50 µm for group 2. The decreases in mean crown length were statistically significantly lower for group 1 compared to group 2, regarding the assessments for 1 year, 2 years and 4 years (p<0.001). Positive and good correlations were observed between ultrasound, cast-model analysis and FluoreCam measurements (p<0.001). CONCLUSIONS: Ultrasound, FluoreCam and colorimeter showed promising results for monitoring any change and progression of incisal tooth wear clinically. Ultrasound might be considered as a quantitative, reliable and repeatable method. Precision of the measurements varied among the diagnostic methods used. Occlusal splints may have a potential preventive effect for progressive tooth wear.


Assuntos
Radiografia Dentária Digital , Desgaste dos Dentes , Humanos , Incisivo , Estudos Longitudinais , Placas Oclusais
9.
Wiad Lek ; 73(7): 1345-1349, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32759417

RESUMO

OBJECTIVE: The aim: To study possibilities of prognosis of pathological wear of tooth hard tissues development depending on the functional activity of masticatory muscles. PATIENTS AND METHODS: Materials and methods: In order to achieve the goal of the study, a survey of patients at the age of 19 to 69 years was conducted for precision of number of persons who have increased tooth wear. During the examination of all patients, three groups were selected: control and two researched ones. Patients in the control group (30 patients between the age of 18 and 60 years old) had an intact dentition without any visible sign of increased tooth wear. The researched groups included 25 patients aged from 18 to 60 years old. The secondresearch group included patients who had increased tooth wear of I-III level. The children of the patients of the II group with or without any sign of increased tooth wear were referred to the third research group. RESULTS: Results: The method of electromyography was performed for the study of peculiarities of the muscular activity of the maxillofacial area of the patients of the control and research groups. In our opinion, all manifestations of increased tooth wear are related to changes in the muscle system, the motor apparatus and the nervous activity of an organism. CONCLUSION: Conclusions: The study of direct muscular apparatus and related bone system may predict the possibility of developing of an increased tooth wear of young patients in the future and prevent its development, as well as to justify the application of a prevention and treatment plan of the studied pathology.


Assuntos
Desgaste dos Dentes , Adolescente , Adulto , Eletromiografia , Humanos , Músculos da Mastigação , Pessoa de Meia-Idade , Prognóstico , Adulto Jovem
10.
Proc Natl Acad Sci U S A ; 117(36): 22264-22273, 2020 09 08.
Artigo em Inglês | MEDLINE | ID: mdl-32839331

RESUMO

Food processing wears down teeth, thus affecting tooth functionality and evolutionary success. Other than intrinsic silica phytoliths, extrinsic mineral dust/grit adhering to plants causes tooth wear in mammalian herbivores. Dental microwear texture analysis (DMTA) is widely applied to infer diet from microscopic dental wear traces. The relationship between external abrasives and dental microwear texture (DMT) formation remains elusive. Feeding experiments with sheep have shown negligible effects of dust-laden grass and browse, suggesting that intrinsic properties of plants are more important. Here, we explore the effect of clay- to sand-sized mineral abrasives (quartz, volcanic ash, loess, kaolin) on DMT in a controlled feeding experiment with guinea pigs. By adding 1, 4, 5, or 8% mineral abrasives to a pelleted base diet, we test for the effect of particle size, shape, and amount on DMT. Wear by fine-grained quartz (>5/<50 µm), loess, and kaolin is not significantly different from the abrasive-free control diet. Fine silt-sized quartz (∼5 µm) results in higher surface anisotropy and lower roughness (polishing effect). Coarse-grained volcanic ash leads to significantly higher complexity, while fine sands (130 to 166 µm) result in significantly higher roughness. Complexity and roughness values exceed those from feeding experiments with guinea pigs who received plants with different phytolith content. Our results highlight that large (>95-µm) external silicate abrasives lead to distinct microscopic wear with higher roughness and complexity than caused by mineral abrasive-free herbivorous diets. Hence, high loads of mineral dust and grit in natural diets might be identified by DMTA, also in the fossil record.


Assuntos
Ração Animal , Cobaias , Plantas , Abrasão Dentária/veterinária , Desgaste dos Dentes/veterinária , Animais , Dieta/veterinária , Herbivoria , Tamanho da Partícula , Abrasão Dentária/etiologia
11.
Pediatr Dent ; 42(4): 300-307, 2020 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-32847670

RESUMO

Purpose: To evaluate the cumulative incidence and progression of erosive tooth wear (ETW) and identify risk factors over 18 months in a cohort of 11- to 14-year-old schoolchildren in Mexico. Methods: The study was conducted in public schools located in northern Mexico City. Permanent teeth of 424 schoolchildren were examined using the basic erosive wear examination. The possible risk factors were included in the logistic models: the consumption of acidic food and beverages; habits related to the consumption of beverages; medication; gastroesophageal reflux; frequent vomiting; and characteristics of the saliva. Results: The prevalence of ETW was 62.5 percent (265 out of 424). The cumulative incidence was 35.2 percent (56 out of 159) and the progression was 72.8 percent (193 out of 265). The consumption of acidic beverages increased the relative risk (RR) of both the cumulative incidence (RR equals 1.09; 95 percent confidence interval [95% CI] 1.02 to 1.18; P=0.005) and the progression (RR equals 1.16; 95% CI 1.01 to 1.34; P=0.003). Conclusions: This population has a high risk of the development and progression of ETW, found in approximately one-third and approximately two-thirds of the schoolchildren, respectively. The most important risk factor was the consumption of acidic beverages.


Assuntos
Erosão Dentária , Desgaste dos Dentes , Adolescente , Criança , Humanos , Incidência , México , Prevalência , Fatores de Risco
13.
Int J Esthet Dent ; 15(3): 242-262, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32760922

RESUMO

The proliferation of digital technology is progressively changing dentistry. Thanks to continual improvements in CAD/CAM devices and dental materials, it is possible nowadays to carry out a treatment plan for oral rehabilitations with fully digital approaches and noninvasive concepts. The availability of digital resources allows clinicians to increase the predictability of enhanced esthetics and good functional results. There is an increasing number of patients today who are affected by excessive tooth wear and may benefit from these kinds of treatments. This article provides a step-by-step documentation of a full-mouth rehabilitation performed with a digital approach and additive CAD/CAM composite resin restorations. An innovative functional evaluation is also documented and discussed. The initial situation was assessed and compared with the rehabilitation project through a snap-on device. After the intraoral adjustment and validation, the final rehabilitation was performed according to the information obtained in the provisional phase and digitally transmitted to the laboratory.


Assuntos
Reabilitação Bucal , Desgaste dos Dentes , Resinas Compostas , Desenho Assistido por Computador , Planejamento de Prótese Dentária , Estética Dentária , Humanos
14.
Int J Esthet Dent ; 15(3): 264-286, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32760923

RESUMO

A modern approach to treating tooth wear aims to stop its progression at an early stage and, ideally, to install effective preventive measures or, in cases when it is already late, to intervene using an interceptive treatment approach. It is important to avoid the need for a full prosthetic treatment that implies additional tooth substance removal, with potential biologic complications. As signs of tooth wear often appear in young individuals, an interceptive treatment has the great potential of stabilizing tooth wear progression early using a no-prep approach and composite resins. The additional benefit of this treatment approach is its affordability and maintainability in the light of tooth wear being, usually, a lifelong pathology. Among the various options for restoring tooth wear lesions with composite resins, interest has lately been increasing for molding techniques (single or full) due to their efficiency and simplicity. This article describes modifications of the basic full molding technique to alleviate most of the known shortcomings of this method; namely, the index deformation, the time-consuming removal of excesses in the proximal and contact areas, and the possible insufficient precision in the molding of the occlusal anatomy. The 1- and 3-year follow-ups of both cases presented here confirmed the functional and esthetic quality of the results obtained with this technique. A kinesiographic and 3D superimposition of the posttreatment and 1-year results of one case provided additional perspectives on this treatment method.


Assuntos
Atrito Dentário , Desgaste dos Dentes , Resinas Compostas , Humanos
15.
J Esthet Restor Dent ; 32(7): 645-661, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32776711

RESUMO

OBJECTIVES: To introduce a minimally invasive and simple ortho-pros approach for localized tooth wear treatment. CLINICAL CONSIDERATIONS: Four patients with localized anterior and/or posterior tooth wear were treated. Occlusal analyses were performed, and localized wax-up or digital setup were designed based on estimated tissue loss. No-prep anterior and posterior partial-coverage polymer-infiltrated ceramic network (PICN, Vita Enamic) restorations (eg, palatal and occlusal veneers) were computer-aided designed and manufactured (CAD-CAM), tried in, and bonded in supraocclusion, creating a posterior open bite. Then, brief partial (three patients) or global (one patient, for anterior teeth alignment request) orthodontic treatment was performed to extrude the posterior teeth and re-establish posterior occlusal contacts. The orthodontic treatment duration was ~2 months for extrusion. Direct composites were performed to mask the labial finish line of palatal veneers. Clinical results were successful after a follow-up of 15, 21, 23, and 47 months, with 100% success rate of PICN anterior restorations and some minor chippings of borders of thin (0.2 mm) posterior occlusal veneers. Patient-reported outcomes were positive. CONCLUSION: Orthodontic-assisted one step-no prep technique is an advantageous and straightforward evolution of the Dahl concept. PICNs exhibit several advantages in this interdisciplinary approach. CLINICAL SIGNIFICANCE: New hybrid-ceramic CAD-CAM materials and a collaborative interdisciplinary approach support the evolution of the Dahl concept for conservative treatment of worn dentitions. The orthodontic-assisted one step-no prep technique is predictable, efficient, and well tolerated by patients and conserves tooth structure.


Assuntos
Implantes Dentários , Desgaste dos Dentes , Cerâmica , Desenho Assistido por Computador , Porcelana Dentária , Humanos , Polímeros
16.
J Appl Oral Sci ; 28: e20200182, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32813839

RESUMO

The increased consumption of citrus sweets can contribute to the development of erosive tooth wear (ETW). Objective This in vitro study evaluated the erosive potential of citrus sweets on bovine enamel samples regarding the quantification of wear. Methodology Ninety bovine crowns were prepared and samples were randomly distributed into 6 groups (n=15): 0.1% citric acid solution (pH 2.5); Coca-Cola ® Soft Drink (pH 2.6); Fini ® Diet (lactic and citric acid, pH 3.3); Fini ® Jelly Kisses (lactic and citric acid, pH 3.5); Fini ® Fruit Salad Bubblegum (maleic acid, pH 2.6); Fini ® Regaliz Acid Tubes (maleic and citric acid, pH 3.1). Sweets were dissolved in the proportion of 40 g/250 mL of deionized water. Enamel samples were submitted to erosive challenges for 7 days (4 daily acid immersion cycles for 90 s each). Enamel wear was measured using contact profilometry (µm), and data (median values [interquartile range]) were submitted to Kruskal-Wallis/Dunn's test (p<0.0001). Results All citrus sweets tested present a high erosive potential, Fini Diet ® (2.4 [1.2]) and Fini Regaliz Tubs ® (2.2 [0.5]) show the highest erosive potential, similar to 0.1% citric acid (2.3 [0.7]); Fini Regaliz Tubs ® is more erosive than Coca-Cola ® (1.4 [0.9]). Conclusion The evaluated citrus sweets have great erosive potential and play a key role in the development of ETW.


Assuntos
Citrus , Erosão Dentária , Desgaste dos Dentes , Animais , Bebidas Gaseificadas , Bovinos , Esmalte Dentário , Concentração de Íons de Hidrogênio
17.
BMC Oral Health ; 20(1): 215, 2020 07 29.
Artigo em Inglês | MEDLINE | ID: mdl-32727438

RESUMO

BACKGROUND: Non-carious cervical lesions (NCCLs) have shown a significant incidence and prevalence and have been increasingly associated with people's lifestyles and youths. This cross-sectional study aimed to determine the prevalence of NCCLs in footballers and to address potential risk indicators. METHODS: Fourty-three male semi-professional footballers with an average of 27 years old completed a questionnaire and were subjected to intraoral examination in terms of cervical tooth wear, morphological characteristics of NCCLs, tooth sensitivity, occlusal/incisal wear, and malocclusion classification. Also, laboratory assays were performed to determine salivary parameters: flow rate, pH, buffer capacity, level of Ca (calcium), Na (sodium), and K (potassium) ions, and level of cortisol. The data obtained from the questionnaire and intraoral examinations were subjected to Chi-square and Poisson regression models while the data obtained from the laboratory assays were analyzed by using analysis of variance (p <  0.05). RESULTS: The prevalence of NCCLs was 39.5%. The participants presented predominantly initial lesions with signs of mechanical stress. The daily training time was found as a significant risk indicator (p = 0.028). The multivariate analysis showed a significant difference in the variables daily training time (p = 0.023), lemon water intake while fasting (p = 0.002), toothpaste type (p = 0.004), tooth sensitivity (p = 0.006); previous orthodontic treatment (p = 0.003), and occlusion type (p = 0.008). All participants presented normal salivary parameters and levels of cortisol. CONCLUSION: The prevalence of NCCLs among footballers was remarkable. The premolars were the most affected teeth and presented symptoms/signs of initial lesions. The daily training time was a dominant risk indicator of NCCLs development. Footballers presented adequate salivary parameters and cortisol levels.


Assuntos
Sensibilidade da Dentina , Desgaste dos Dentes , Adolescente , Adulto , Estudos Transversais , Humanos , Masculino , Prevalência , Colo do Dente , Desgaste dos Dentes/epidemiologia
18.
Oral Health Prev Dent ; 18(1): 311-318, 2020 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-32618454

RESUMO

PURPOSE: The aim of this study was to investigate the in vitro effect of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) and fluoride-containing varnish on prevention enamel erosive tooth wear. MATERIALS AND METHODS: A total of 28 enamel samples were prepared from human molars, divided into four groups: CPP-ACPF varnish, TCP-F varnish, NaF varnish, and deionised water. For the remineralisation process stimulated human pooled saliva was used. After treatment, all enamel samples were exposed to 10 ml of Coca Cola. Ca++ release was determined by atomic absorption spectroscopy (AAS). The surface topography was evaluated by atomic force microscopy (AFM). Surface microhardness of enamel was analysed and SMHR % (surface microhardness reduction ) was calculated. Data were analysed with repeated measures analysis of variance (ANOVA). RESULTS: Deionised water demonstrated a statistically significantly higher Ca+2 release compared to those of groups NaF > fTCP > CPP-ACPF, respectively (p <0.01). All groups measured for root-mean-square-roughness (Rrms) showed a statistically significantly difference of 6 × 6 µm2 and 12 × 12 µm2 enamel area (p <0.05) compared with a negative control group. CPP-ACPF varnish showed rougher surfaces than all remineralisation groups. SMHR % of enamels were as follows: CPP-ACPF < fTCP < NaF < deionised water (p <0.01). CONCLUSION: According to the findings of this study; CPP-ACP containing agents have a statistically statistically significant effect on preventing dental erosion. Among these, CPP-ACPF-containing remineralisation agents have the most effect on the remineralisation process.


Assuntos
Esmalte Dentário , Desgaste dos Dentes , Caseínas , Humanos , Microscopia de Força Atômica , Pintura , Pirazinas , Remineralização Dentária
19.
Oral Health Prev Dent ; 18(1): 619-624, 2020 Jun 08.
Artigo em Inglês | MEDLINE | ID: mdl-32700515

RESUMO

PURPOSE: The in-situ efficacy of an experimental stannous (Sn)-containing sodium fluoride (NaF) dentifrice against erosion and erosive tooth wear was compared with a conventional NaF dentifrice. MATERIALS AND METHODS: This was a randomised, controlled, double-blind, parallel-group clinical trial. Mandibular appliances containing four enamel specimens (2 per side [L/R] of the appliance) were worn by 60 generally healthy adult subjects. Subjects were randomised to treatment based on age and gender. Treatments included a Sn-containing NaF or conventional NaF dentifrice. Conditions of erosion (dentifrice slurry treatment) and erosion/tooth wear (dentifrice slurry plus brushing) were compared. Dentifrices were used twice per day for 30 s of lingual brushing, followed by 90 s of slurry exposure. In addition, the two specimens on the left side of the mouth were brushed for 5 s each, using a power toothbrush. All specimens were exposed to four daily erosive challenges with commercial orange juice (pH 3.6). Tooth wear was measured as enamel loss using non-contact profilometry on day 10. RESULTS: At the day 10 visit, the adjusted mean (SE) enamel loss for specimens receiving slurry (erosion) treatment was 4.7 µm (0.61) [Sn-containing NaF] and 8.73 µm (1.12) [NaF control], with results demonstrating a statistically significant benefit for the Sn-containing dentifrice (46.2% benefit; p = 0.009). For specimens exposed to erosion/tooth wear conditions, enamel loss = 6.68 µm (1.29) (Sn-containing NaF) and 10.99 µm (1.29) (NaF group), with results statistically significant (p = 0.048; 39.2% better, favouring the Sn-containing dentifrice). When data were combined, enamel loss (SE) for all specimens subjected to erosion + erosion/tooth wear was 5.61 µm (0.77) (Sn-containing NaF]) and 9.9 µm (1.3) (NaF group). The difference again was statistically significant, favouring the Sn-containing group (p = 0.022; 43.4% better). CONCLUSIONS: The Sn-containing dentifrice demonstrated significantly better protection than did NaF under erosive and erosive/tooth wear conditions.


Assuntos
Dentifrícios , Erosão Dentária , Desgaste dos Dentes , Adulto , Fluoretos , Humanos , Fluoreto de Sódio , Fluoretos de Estanho
20.
Sci Rep ; 10(1): 8809, 2020 06 01.
Artigo em Inglês | MEDLINE | ID: mdl-32483196

RESUMO

Paleontologists and paleoanthropologists have long debated relationships between cranial morphology and diet in a broad diversity of organisms. While the presence of larger temporalis muscle attachment area (via the presence of sagittal crests) in carnivorans is correlated with durophagy (i.e. hard-object feeding), many primates with similar morphologies consume an array of tough and hard foods-complicating dietary inferences of early hominins. We posit that tapirs, large herbivorous mammals showing variable sagittal crest development across species, are ideal models for examining correlations between textural properties of food and sagittal crest morphology. Here, we integrate dietary data, dental microwear texture analysis, and finite element analysis to clarify the functional significance of the sagittal crest in tapirs. Most notably, pronounced sagittal crests are negatively correlated with hard-object feeding in extant, and several extinct, tapirs and can actually increase stress and strain energy. Collectively, these data suggest that musculature associated with pronounced sagittal crests-and accompanied increases in muscle volume-assists with the processing of tough food items in tapirs and may yield similar benefits in other mammals including early hominins.


Assuntos
Dieta/história , Músculos Faciais/anatomia & histologia , Comportamento Alimentar , Osso Frontal/anatomia & histologia , Hominidae/anatomia & histologia , Mandíbula/anatomia & histologia , Perissodáctilos/anatomia & histologia , Desgaste dos Dentes , Animais , Anisotropia , Dente Pré-Molar/fisiologia , Ecologia , Músculos Faciais/fisiologia , Dureza , Herbivoria , História Antiga , Mandíbula/fisiologia , Mastigação , Dente Serotino/fisiologia , Perissodáctilos/fisiologia , Especificidade da Espécie
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