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1.
Acta Odontol Scand ; 81(4): 255-258, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-36178707

RESUMO

OBJECTIVE: This study aimed to evaluate the relationship between aesthetic concern and self-esteem in adolescents with severe malocclusion. METHODS: A cross-sectional study developed with 543 adolescents from 11 to 13 years of age and severe malocclusion was selected. Dental aesthetic index (DAI) diagnosed the malocclusion and selected the groups with greater severity (DAI 3 and 4). Aesthetic concern was assessed using the oral aesthetic subjective impact scale (OASIS) and considered an outcome variable. The global negative self-evaluation (GSE) evaluated self-esteem. The variables were analysed using Poisson multiple regression and the model adjustment determined by the Akaike information criterion (AICC). The effect of each variable on OASIS was expressed as a prevalence ratio (PR) with 95% confidence intervals. The analyses were performed using the R program with a significance level of 5%. RESULTS: A significant association was observed between aesthetic concern scores and self-esteem (p<.05). Individuals with low self-esteem had OASIS scores 14% higher (PR: 1.14; 95% CI: 1.08-1.21). There was no significant association between OASIS and gender and age (p>.05). CONCLUSIONS: Self-esteem modulates how the individual perceives malocclusion. Adolescents with severe and very malocclusion and low self-esteem have greater aesthetic concerns.


Assuntos
Estética Dentária , Má Oclusão , Humanos , Adolescente , Estudos Transversais , Má Oclusão/epidemiologia , Autoimagem , Estética , Inquéritos e Questionários
2.
Am J Orthod Dentofacial Orthop ; 162(5): e252-e256, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-36100479

RESUMO

INTRODUCTION: This study evaluated the impact of the esthetic and occlusal characteristics of the Dental Aesthetic Index (DAI) on the need for orthodontic treatment in a non-White population. METHODS: A cross-sectional study was conducted with 1296 non-White adolescents aged 12 years. DAI was the outcome variable (DAI 1 and 2 and DAI 3 and 4). The independent variables were categorized on the basis of the occlusal esthetic characteristics evaluated by DAI (tooth absence, crowding, spacing, midline diastema, maxillary misalignment, mandibular misalignment, maxillary anterior overjet, mandibular overjet, anterior open bite, and anteroposterior molar relationship). Simple logistic regression models were adjusted for the outcome, and the raw odds ratios were estimated. Variables with a P value of <0.20 for individual analyses were tested in a multiple logistic regression model, with P ≤0.05 remaining. RESULTS: A total of 1296 adolescents (764 girls and 532 boys) were evaluated; 1067 (82.3%) had DAI 1 or 2 (minor to a moderate need for orthodontic treatment), and 229 (17.7%) had DAI 3 or 4 (defined need for orthodontic treatment). The results showed that adolescents with diastema, maxillary irregularity, mandibular irregularity, mandibular overjet, anterior open bite, and the altered molar relationship had 5.34, 2.36, 2.63, 3.56, 8.73, and 5.16 times more likelihood to have DAI 3 or 4 (P ≤0.05), respectively. CONCLUSIONS: Diastema, maxillary and mandibular misalignment, mandibular overjet, anterior open bite, and anteroposterior molar relationship were the characteristics that influenced the determination of the need for orthodontic treatment in a non-White population using the DAI index.

3.
Am J Orthod Dentofacial Orthop ; 158(5): 668-673, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32978016

RESUMO

INTRODUCTION: The purpose of this research was to evaluate the esthetic impact of orthodontic treatment need in adolescents. METHODS: This cross-sectional study was performed with 1172 adolescents aged 12 (n = 638) years and 15 (n = 534) years from Salvador, Bahia, Brazil. The esthetic impact was the following outcome variables: Aesthetic Component of the Index of Orthodontic Treatment Need and the Oral Aesthetic Subjective Impact Scale. The normative orthodontic treatment need was assessed by the Dental Health Component of the Index of Orthodontic Treatment Need (IOTN-DHC) and by the Dental Aesthetic Index (DAI). Logistic regression models were adjusted, estimating crude odds ratio with the respective 95% confidence intervals. The variables with P ≤0.20 in the individual analyses were tested in multiple logistic regression models, remaining the variables with P ≤0.05. RESULTS: The results showed a statistically significant association for the esthetic impact (Aesthetic Component of the Index of Orthodontic Treatment Need and the Oral Aesthetic Subjective Impact Scale) when assessing the normative orthodontic treatment need by the DAI (P <0.05). However, there was no significant association between subjective esthetic impact and normative needs when using the IOTN-DHC (P >0.05). CONCLUSIONS: DAI was more associated with the adolescents' esthetic concern than IOTN-DHC and should be the Index of Orthodontic Treatment Need to be selected to complement the patient's self-perception.


Assuntos
Estética Dentária , Má Oclusão , Adolescente , Brasil , Criança , Estudos Transversais , Humanos , Índice de Necessidade de Tratamento Ortodôntico , Má Oclusão/terapia , Ortodontia Corretiva , Autoimagem
4.
Am J Orthod Dentofacial Orthop ; 156(6): 818-822, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31784015

RESUMO

INTRODUCTION: This study aimed to explore the perception of orthodontic treatment need by using the Dental Aesthetic Index (DAI) and the Index of Orthodontic Treatment Need (IOTN). METHODS: A cross-sectional study was conducted on a representative random sample (N = 248) of adolescents aged 12 years. The DAI and both components of IOTN were used to evaluate malocclusion. The association between the Dental Health Component of the IOTN with gender and ethnic group were analyzed by chi-square test. The concordances between the indexes were analyzed by the kappa statistic, with 95% confidence intervals (CIs). RESULTS: The prevalence of adolescents with high severity and orthodontic treatment need was 10.5% (95% CI, 6.7-14.3), 36.5% (95% CI, 32.3-44.3), and 73.4% (95% CI, 67.9-78.9) for the Aesthetic Component of the IOTN, Dental Health Component of the IOTN, and DAI, respectively. The indexes showed high agreement for the cases with low treatment need, whereas low concordance was observed for the cases with high treatment need. CONCLUSIONS: The perception of orthodontic treatment need was assessed differently using DAI and IOTN.


Assuntos
Estética Dentária , Índice de Necessidade de Tratamento Ortodôntico , Má Oclusão , Criança , Estudos Transversais , Necessidades e Demandas de Serviços de Saúde , Humanos
6.
Eur J Orthod ; 36(3): 297-302, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24062381

RESUMO

OBJECTIVES: This study investigated whether the addition of diphenyliodonium chloride (DPC) to experimental resin bonding agents would allow fixation of brackets to enamel using shorter light exposure times. METHODS: Photoactivated dimethacrylate-based composites were prepared containing DPC molar concentrations of 0 (control), 0.5 (R05), or 1 per cent (R1). Metallic brackets were bonded to bovine incisors and the bond strengths were evaluated using a shear test. In total, 18 groups were tested (n = 15 per group) defined by three bonding materials (control, R05, or R1), three light-activation time (8, 20, or 40 seconds), and two storage periods (10 minutes or 24 hours). The adhesive remnant index (ARI) was scored under magnification. Data were statistically analysed at a 5 per cent significance level. RESULTS: At 10 minutes, the control composite showed lower bond strengths than the DPC-modified bonding agents for all light-activation times. Differences in bond strengths between both DPC-modified agents were not significant. Lower bond strengths at 10 minutes were generally observed for groups light activated for 8 seconds compared with groups light activated for 20 and 40 seconds. At 24 hours, no significant differences were observed among the light-activation times. The bond strengths at 24 hours were higher than the bond strengths at 10 minutes for all groups. A predominance of ARI scores 2 and 3 was generally observed. CONCLUSION: The use of a ternary photoactivation system containing an iodonium salt in bonding composites may allow bonding brackets to enamel using reduced light exposure times.


Assuntos
Compostos de Bifenilo/química , Colagem Dentária/métodos , Oniocompostos/química , Braquetes Ortodônticos , Cimentos de Resina/química , Adesivos , Animais , Bovinos , Esmalte Dentário , Análise do Estresse Dentário/métodos , Cura Luminosa de Adesivos Dentários/métodos , Ortodontia , Resistência ao Cisalhamento , Propriedades de Superfície
7.
Cranio ; 41(2): 139-143, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33063638

RESUMO

OBJECTIVE: To investigate the association between temporomandibular disorder (TMD) symptoms and women's oral health-related quality of life (OHRQoL).Methods: An observational case-control study was performed with 765 adult women aged 21.5 years on average. Oral Health Impact Profile (OHIP-14) assessed OHRQoL and determined the selection of cases and controls matched by age and marital status at a ratio of 1:4 (153 cases: 612 controls). American Academy of Orofacial Pain's self-explanatory questionnaire assessed the TMD symptoms. The TMD symptoms' impact on OHRQoL was analyzed, estimating the odds ratio with a 95% confidence interval. RESULTS: Of the women, 86.9% in the case group, and 69.6% in the control group presented some TMD symptoms (p< 0.05). Women with an impacted OHRQoL are 2.95 (95% CI:1.79-4.86) times more likely to report some TMD symptoms (p< 0.05). DISCUSSION: Women with a negative impact on OHRQoL are more likely to report TMD symptoms.


Assuntos
Qualidade de Vida , Transtornos da Articulação Temporomandibular , Adulto , Humanos , Feminino , Estudos de Casos e Controles , Saúde Bucal , Transtornos da Articulação Temporomandibular/etiologia , Fatores de Risco , Inquéritos e Questionários
8.
Angle Orthod ; 2022 Jun 07.
Artigo em Inglês | MEDLINE | ID: mdl-35666207

RESUMO

OBJECTIVES: To assess the correlation between malocclusion and a history of bullying. MATERIALS AND METHODS: A cross-sectional study of 494 adolescents aged 12 to 15 years was conducted. The National School Health Survey questionnaire (PeNSE 1 and 2) was used to determine history of bullying by identifying the victim and the abuser. Variables were evaluated based on the individual (age), environment (income, father's and mother's education, housing, government assistance, and parents' occupation), social and emotional well-being (CPQ11-14 domains), self-perceived need for orthodontic treatment, and clinical conditions (crowding, diastema, maxillary and mandibular overjet, and anterior open bite). Data were analyzed by Spearman correlation and by multivariate analysis, which allowed graphical representation of the eight variables studied in only two dimensions. RESULTS: There was no correlation between bullying and variables related to the individual and the environment. Maxillary overjet and self-perception related to the need for orthodontic treatment were important to explain the data variability. CONCLUSIONS: Malocclusion did not correlate with bullying history. However, increased maxillary overjet influences adolescent self-perception, suggesting a potential condition for bullying events.

9.
Int Orthod ; 20(2): 100633, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-35339407

RESUMO

OBJECTIVES: The aim of this study was to measure the frictional resistance of different types of ligatures used on conventional and self-ligating brackets. MATERIALS AND METHODS: Monoblock (conventional) and Portia (self-ligating) brackets were used and the archwire used was nickel-titanium. On conventional brackets the ligatures tested were the Elastomeric type and steel 0.30 tie-wire. The groups were divided according to the ligature types (n=8): (1) conventional elastomeric ligature; (2) relaxed conventional elastomeric ligature; (3) elastomeric ligature in shape-8; (4) double vertical elastomeric ligatures; (5) double-crossed elastomeric ligatures; (6) crossed ligature; (7) steel wire ligature; and (8) self-ligating ligature (self-ligating bracket). A segment of five brackets, each ligature types, was mounted. The archwire, between the bracket and the ligature, was connected on Instron® Universal test machine to simulate the frictional resistance. The maximum frictional resistance was obtained, and the mean values were submitted to the analysis of variance (ANOVA) and the Tukey's post-hoc test (α=0.05). RESULTS: The elastomeric ligature in shape-8 showed the highest value compared with other groups (P<0.05). Although the crossed elastomeric ligature presented the lowest mean value and it was not statistically different regarding relaxed conventional elastomeric ligature, steel wire ligature and self-ligating (P≥0.05). CONCLUSIONS: The frictional resistance was influenced by ligature types. Elastomeric Ligature in shape-8 showed the highest frictional force. Crossed Elastomeric Ligature had the lowest frictional force value.


Assuntos
Braquetes Ortodônticos , Fios Ortodônticos , Ligas Dentárias , Análise do Estresse Dentário , Fricção , Humanos , Teste de Materiais , Níquel , Desenho de Aparelho Ortodôntico , Aço Inoxidável , Titânio
10.
Cien Saude Colet ; 26(suppl 3): 5233-5240, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34787214

RESUMO

The aim of this study was to evaluate the impact of malocclusion severity on the oral health-related quality of life (OHRQoL) of non-white adolescents. A cross-sectional study was conducted with 585 non-white Brazilian adolescents (12-15 years). The Dental Aesthetic Index (DAI) was used for the clinical assessment of malocclusion and Oral Health Impact Profile (OHIP-14) on OHRQoL. Deep bite and transverse occlusal relationships were assessed in association with the DAI. The adolescents with DAI 3 and 4 were distributed into 4 groups: G1 - individuals without transverse occlusal relationships or deep bite; G2 - individuals with only posterior crossbite; G3 - individuals with only deep bite; and G4 - individuals with Brodie bite. The backward stepwise procedure was used to select variables on each level, eliminating variables with a p≤0.20. From the logistic regression analyses, the adjusted odds ratios were estimated with the respective 95% confidence intervals. The adolescents with severe malocclusion divided into the G2, G3 and G4 showed p-value of 0.0501, 0.1475, and 0.5407, respectively, but did not remain in the final model. Malocclusion severity had no impact on the OHRQoL of non-white adolescents.


Assuntos
Má Oclusão , Qualidade de Vida , Adolescente , Estudos Transversais , Humanos , Má Oclusão/epidemiologia , Saúde Bucal , Inquéritos e Questionários
11.
Cranio ; 39(3): 249-253, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-31232226

RESUMO

Objective: The aim of this study was to associate the presence of oral habits with anxiety and malocclusion.Methods: Cross-sectional observational study with 199 schoolchildren 6-14 years old. Malocclusion was evaluated by using the Index of Orthodontic Treatment Need (IOTN). Oral Habits Questionnaire and Hospital Anxiety and Depression Scale (HADS) were used to assess oral habits and anxiety. The schoolchildren were divided into two groups: mixed and permanent dentition. The associations between the outcome variable (oral habits) and the independent variables (anxiety and malocclusion) were evaluated using the Exact Fischer test and the Chi square test.Results: Of the individuals with malocclusion in permanent dentition, 77.4% reported some deleterious oral habit, and 55% of those with no malocclusion at this stage had deleterious habits.Discussion: Oral habits may be associated with the presence of malocclusion in different stages of occlusal development (mixed and permanent dentition) and may be influenced by anxiety.


Assuntos
Má Oclusão , Adolescente , Ansiedade/epidemiologia , Criança , Estudos Transversais , Hábitos , Humanos , Má Oclusão/complicações , Má Oclusão/epidemiologia , Inquéritos e Questionários
12.
Dental Press J Orthod ; 26(2): e2119199, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34008739

RESUMO

AIM: To assess the influence of elastomeric ligatures, subjected to a previous in vitro pigmentation process using different substances, on smile aesthetics during orthodontic treatment, from the perception of students and professionals. METHODS: Eight elastomeric ligatures of five commercial brands (3M/Unitek, American Orthodontics, Morelli, Ortho Technology, and Orthometric) (n=8) were immersed in coffee, Coca-Cola, and red wine for one minute per day, for 28 days; and another group of ligatures was immersed in artificial saliva. All samples were photographed and subsequently analyzed using the Adobe Photoshop software, by the RGB method. Afterwards, the pigmented ligatures were inserted in a patient wearing orthodontic brackets, and zoomed photographs of the smile were taken and presented to 40 evaluators, who filled in a satisfaction scale sheet to express their opinion on the smile aesthetics of each photograph. The color data were subjected to analysis of variance (ANOVA) and Tukey tests. RESULTS: The substance with the highest pigmentation potential was coffee (p< 0.05) followed by red wine (p< 0.05). Comparison among the brands used in this study showed that American Orthodontics and Orthometric had the lowest degree of pigmentation when immersed in coffee and red wine (p< 0.05), respectively. However, the brand that showed the highest level of satisfaction among the evaluators was Ortho Technology. CONCLUSIONS: The presence of pigmented elastomeric ligatures affected smile aesthetics, when compared with the control group.


Assuntos
Elastômeros , Braquetes Ortodônticos , Estética Dentária , Humanos , Teste de Materiais , Pigmentação
13.
Angle Orthod ; 91(4): 496-501, 2021 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-33587118

RESUMO

OBJECTIVES: To assess the esthetic impact of anterior occlusal conditions and malocclusion severity levels. MATERIALS AND METHODS: A population-based cross-sectional study of 700 adolescents aged 15 to 19 years was conducted. The Oral Aesthetic Subjective Impact Scale (OASIS) was used to evaluate the subjective esthetic impact of malocclusion. The Dental Aesthetic Index (DAI) criteria were used to diagnose the anterior occlusal characteristics in isolation and the severity levels of malocclusion. The variables with P < .20 in the individual analyses were tested in multiple logistic regression models, and those with P < .10 remained in the model. The adjusted odds ratio (OR) was estimated with a 95% confidence interval (CI). RESULTS: Of the adolescents, 42% showed negative self-perception of malocclusion. In addition, 15.4% of adolescents had severe malocclusion (DAI 3) and 18.9% very severe malocclusion (DAI 4). Crowding and spacing were shown to be 2.90 (CI: 2.06-4.09) and 2.53 (CI: 1.65-3.86) times, respectively, more likely to cause a negative esthetic impact in adolescents (P < .05). In addition, adolescents with orthodontic treatment need (DAI 2, 3, and 4) were more likely to report a negative esthetic impact (P < .05). CONCLUSIONS: Anterior crowding and spacing are the conditions that most influence the esthetic concern of adolescents. Adolescents with very severe malocclusion and higher orthodontic treatment need are more likely to report a negative esthetic impact.


Assuntos
Estética Dentária , Má Oclusão , Adolescente , Estudos Transversais , Humanos , Modelos Logísticos
14.
Int Orthod ; 18(2): 359-365, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32057734

RESUMO

OBJECTIVE: The present study aimed to compare the force of aesthetic wires and their non-aesthetic equivalents from two commercial brands at different displacement points, during the unloading phase at 36°C. MATERIALS AND METHODS: Forty samples (n=10) were assessed, which were presented in two groups of aesthetic wires and two groups of non-aesthetic wires from the brands GAC® (Dentsply GAC® International, NY, USA) and Aditek®(Cravinhos, SP, Brazil), with 0.016-inch gauge. The orthodontic wires were maintained at a temperature of 36°C throughout the experiment and they were subjected to the three-point bending test at a speed of 1mm/min. The unloading values were recorded as 0.5, 1.5, and 2.5mm of displacement. The data were subjected to Student's t-test and unequal variance t test, at 5% significance level. RESULTS: During the unloading phase, the mean force was significantly higher for aesthetic wires than non-aesthetic ones, in the deflection of 2.5mm, presenting values means of 2.25N (P=.0213). In deflections of 0.5mm and 1.5mm, the orthodontic archwires did not show significant differences in force between the thermally activated wires with aesthetic coating and their non-aesthetic equivalents (P≥0.05). CONCLUSION: It is concluded that during the unloading phase at a temperature of 36°C, the orthodontic archwires analyzed did not show significant difference in force between thermally activated wires with aesthetic coating and their non-aesthetic equivalents at most displacement points analysed, except for the deflection of 2.5mm, which showed higher values.


Assuntos
Fenômenos Mecânicos , Níquel , Fios Ortodônticos , Titânio , Ligas Dentárias , Análise do Estresse Dentário , Estética Dentária , Técnicas In Vitro , Teste de Materiais
15.
Int Orthod ; 18(3): 509-518, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32327346

RESUMO

OBJECTIVE: To establish a simplified method for measuring the edge bevel radius of 0.019×0.025-in steel rectangular orthodontic wires, achievable in the clinical environment, and to compare it with the photographic method. MATERIALS AND METHODS: Aided by the AutoCAD™ 2016 software, the theoretical mathematical relationship was determined between the edge rounding radius and cross-sectional dimensions (height, width, diagonals), through rectangle drawings that represent cross-sections. Two hundred segments (n=20) were obtained from the posterior portions of 100 archwires from 10 brands (Dentaurum™; American-Orthodontics™; GAC™; 3M-Unitek™; Abzil™; Morelli™; Orthometric™; Aditek™; A-Company™; Orthomundi™). The cross-sectional measures of each segment were obtained with a micrometer and a caliper, and the edge bevel radii of these segments were calculated with the use of a mathematical formula. For the "gold standard", the segments were included longitudinally in a phenolic resin cylinder, cross-sectioned, polished, and photographed in scanning electron microscope (SEM). The images were amplified 770× and the radii were measured with an acetate template. The micrometer and caliper measuring methods were subjected to Bland-Altman analysis and compared with the gold standard (SEM), considering ±10µm as the maximum acceptable difference between methods. RESULTS: In the micrometre measurement, 95% of the differences from the standard were within the limits of agreement (-7.21 and 5.56µm). For the caliper method, 95% of the differences were between -5.46 and 19.83µm, which exceeded the fixed limit ±10µm. CONCLUSION: The calculation method with micrometre measurements is equivalent to the photographic method, but there is no such equivalence for the caliper measurements.


Assuntos
Fios Ortodônticos , Ortodontia , Rádio (Anatomia) , Estudos Transversais , Análise do Estresse Dentário , Desenho de Equipamento , Humanos , Teste de Materiais , Modelos Teóricos , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos , Projetos Piloto , Software , Aço Inoxidável , Torque
16.
Angle Orthod ; 90(4): 564-570, 2020 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-33378500

RESUMO

OBJECTIVES: To evaluate the impact of anterior occlusal conditions in the mixed dentition on item-level analysis of oral health-related quality of life (OHRQoL). MATERIALS AND METHODS: A population-based cross-sectional study of 787 children aged 8 to 10 years was conducted. The Child Perceptions Questionnaire (CPQ8-10) was used to evaluate OHRQoL, and the analysis of item levels was performed on CPQ8-10 domains. Anterior occlusal characteristics were diagnosed according to the Dental Aesthetic Index criteria. Individual analyses were performed relating the outcome as independent variables. The variables with P < .20 in the individual analyses were tested in multiple logistic regression models, and those with P < .10 remained in the model. The adjusted odds ratio (OR) was estimated with a 95% confidence interval (CI). RESULTS: No associations were found with regard to anterior occlusal characteristics (P < .001) after the variables of the previous determinants were adjusted for multivariate analysis. However, the following variables were significantly associated with negative impact on OHRQoL item levels: sex, in oral symptoms (OR = 1.42; CI, 1.07-1.89) and emotional well-being (OR = 1.34; CI, 1.00-1.79); race, in oral symptoms (OR = 1.48; CI, 1.10-1.98), emotional well-being (OR = 1.54; CI, 1.14-2.06), and social well-being (OR = 1.34; CI, 1.00-1.80); and family income in functional limitation (OR = 1.46; CI, 1.06-2.02), emotional well-being (OR = 1.71; CI, 1.21-2.42), and social well-being (OR = 1.59; CI, 1.14-2.21). CONCLUSIONS: Anterior occlusal conditions did not affect the levels of OHRQoL items.


Assuntos
Cárie Dentária , Má Oclusão , Brasil , Criança , Estudos Transversais , Dentição Mista , Humanos , Saúde Bucal , Qualidade de Vida , Inquéritos e Questionários
17.
Braz Dent J ; 30(6): 587-591, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31800753

RESUMO

This study to evaluate the effects of different hydrofluoric acid (HF) concentrations and thermal cycling on the shear bond strength (SBS) of brackets to ceramic. Cylinders of ceramic were divided into 10 groups (n=15), according to HF concentrations: 1-1%;2-2.5%;3-5%;4-7.5%;5-10% (storage 24 h); 6-1%;7-2.5%;8-5%;9-7.5%; and, 10-10% (thermal cycling). All cylinders were etched for 60s and received one layer of silane. Metallic brackets were bonded to the cylinders using Transbond-XT, light activated for 40 s, using a LED (Radii Plus) and stored in deionized water at 37o C for 24h. The groups 6 to 10 were submitted to thermal cycling (7,000 cycles - 5o/55oC). SBS was performed in an Instron at crosshead speed of 1.0 mm/min. Data were submitted to two-way ANOVA and Tukey's post-hoc test (α=0.05). The Adhesive Remaining Index (ARI) was evaluated at 40x magnification. The different HF acid concentrations influenced on the SBS of the brackets to ceramic (p<0.05). The thermal cycling decreased the SBS of the brackets to ceramic for all acid concentrations (p<0.05). The ARI showed a predominance of scores 0 for all groups, with an increase in scores 1, 2 and 3 for the group storage for 24 h. In conclusion, the different HF acid concentrations 5.0%, 7.5% and 10% influenced on the SBS of brackets to ceramic. The thermal cycling decreased significantly the SBS of brackets to ceramic.


Assuntos
Colagem Dentária , Braquetes Ortodônticos , Cerâmica , Análise do Estresse Dentário , Ácido Fluorídrico , Cimentos de Resina , Resistência ao Cisalhamento , Silanos
18.
Dental Press J Orthod ; 23(1): 46-55, 2018 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29791691

RESUMO

OBJECTIVE: This study aimed at evaluating whether changes in the insertion angle is a determining factor in the positioning of the miniscrews body in a region with larger interradicular space in the posterior maxilla. METHODS: Analysis of 60 posterior maxillary quadrants were made using images obtained by means of cone-beam computed tomographic image (CBCT), with 0.076-mm voxel, which presented a real miniscrew inserted in the mesial region of the maxillary first molars, serving as reference point for the placement of the virtual miniscrews. Measurements of the distances between roots were made in three points on the body of the virtual miniscrews (A, B and C), at four different angulations, 70o, 60o, 50o and 40o (T1 to T4), in relation to the long axis of the second premolar. This evaluation was made in four groups, selected in accordance with the disposition of the roots of the second premolars and first molars: Group 1 (all types of roots), Group 2 (convergent roots), Group 3 (divergent roots) and Group 4 (parallel roots). RESULTS: There were no statistically significant differences in the measurements of points A, B and C, at the different angles (70o, 60o, 50o and 40o) and in the different groups (p > 0.05). CONCLUSIONS: Changes in the insertion angle is not a determinant factor in the positioning of miniscrews body in regions with larger interradicular space in posterior maxilla.


Assuntos
Parafusos Ósseos , Tomografia Computadorizada de Feixe Cônico , Maxila/diagnóstico por imagem , Procedimentos de Ancoragem Ortodôntica/métodos , Aparelhos Ortodônticos Fixos , Dente Pré-Molar/diagnóstico por imagem , Feminino , Humanos , Masculino , Dente Molar/diagnóstico por imagem , Procedimentos de Ancoragem Ortodôntica/instrumentação
19.
Cranio ; 35(6): 392-396, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-27796174

RESUMO

OBJECTIVES: The aim of this study was to investigate the association between symptoms of temporomandibular disorders (TMD), quality of life, and malocclusion. METHODS: A cross-sectional observational design study was utilized among 248 schoolchildren aged 12 years old. Symptoms of TMD were assessed using the Orofacial Pain and Temporomandibular Disorders Triage Questionnaire, and subjects were further evaluated as oral-health-related quality of life (CPQ11-14), tooth clenching/grinding and malocclusion (Dental Aesthetic Index). Chi-square for independence, Odds Ratio and Mann-Whitney test were used (p = 0.05) statistically. RESULTS: Statistically, association was detected between TMD symptoms with pain and worse quality of life (p < 0.0138), and pain with quality of life and clenching/grinding (p = 0.0120 and 0.0007). DISCUSSION: The symptoms of TMD are associated with pain and teeth clenching, causing a negative impact on schoolchildren's quality of life; thus, a study of the TMD impact on quality of life is justified.


Assuntos
Dor Facial/fisiopatologia , Má Oclusão/fisiopatologia , Qualidade de Vida , Transtornos da Articulação Temporomandibular/fisiopatologia , Bruxismo/fisiopatologia , Criança , Estudos Transversais , Feminino , Humanos , Masculino , Inquéritos e Questionários
20.
Artigo em Inglês | LILACS, BBO - odontologia (Brasil) | ID: biblio-1422282

RESUMO

Abstract Objective: To associate the OHRQoL and HRQoL in mixed dentition children with the influence on age range, socioeconomic and clinical variables. Material and Methods: A cross-sectional study was carried out with 1,240 children between 6 and 12 years of age. HRQoL was assessed by the Quality of Life Assessment Scale, considered an outcome variable. OHRQoL was determined using specific questionnaires related to the age group: Oral Health Impact Scale in Early Childhood, Child Perceptions Questionnaire for 8 to 10 years, and 11 to 12 years. Dental caries and malocclusion were diagnosed. The socioeconomic class was evaluated. A multiple negative binomial regression analysis was used to test the relationship between HRQoL, OHRQoL scores and socioeconomic and clinical variables. Correlation analyses were performed between the total HRQoL and OHRQoL, with a significance level of 5%. Results: The HRQoL is inversely related to the impact of OHRQoL (p<0.05), modulated by the age group. There was a significant weak negative correlation between the HRQoL scores and the impact of OHRQoL (p<0.05). Conclusion: The OHRQoL impacts the HRQoL, modulated by the age group and with minor influence from socioeconomic and clinical variables (AU).


Assuntos
Humanos , Masculino , Feminino , Criança , Qualidade de Vida , Criança , Saúde Bucal , Cárie Dentária/prevenção & controle , Dentição Mista , Estudos Transversais/métodos , Inquéritos e Questionários , Análise de Regressão
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