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1.
J Med Life ; 14(1): 81-85, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33767790

RESUMO

This study aims to determine whether the design of resin posts reinforced with glass fiber (FRC) and Reporfost (Angelus, Londrina, PR, Brazil) significantly improves the fracture resistance of endodontically treated teeth restored through this method.A batch of 30 maxillary monoradicular teeth (15 central incisors, 15 canines) were treated endodontically by step-back technique (apical enlargement 40-K file) sealed with Sealapex (Kerr Corporation, Orange, US) and gutta-percha by lateral condensation, cold. They were divided into two equal groups, prepared for cementing the FRC posts. The Exacto posts (Angelus, Londrina, PR, Brazil) in group 1 and the Reforpost posts (Angelus; Londrina; PR, Brazil) were cemented with dual cure resin cement Breeze Self-Adhesive Resin Cement (Pentron Clinical, Orange, US). Fracture resistance testing was performed on the crown-apical axial direction, using the Hounsfield / Tinius Olsen H1-KS, PA, USA mechanical testing apparatus. The behavior of each tooth-post assembly was recorded as a graph. The statistical analysis was done using one way ANOVA (α=0.05). The differences between the Exacto post group and the Reforpost post group are not statistically significant (p = 0.466). The maximum force recorded was 970 N and the minimum 186N. The mean force at which the fracture occurred was approximately 500N for both groups. The strain test showed that modifying the Reforpost post design did not improve the fracture resistance parameters of the tooth-post assembly through increasing the surface friction or maintaining adhesion to the walls of the root dentin.


Assuntos
Resinas Compostas/uso terapêutico , Vidro/química , Técnica para Retentor Intrarradicular , Fraturas dos Dentes/terapia , Dente não Vital/terapia , Humanos , Teste de Materiais , Estresse Mecânico
2.
J Appl Oral Sci ; 28: e20190544, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32348440

RESUMO

Objective To evaluate the influence of three levels of dental structure loss on stress distribution and bite load in root canal-treated young molar teeth that were filled with bulk-fill resin composite, using finite element analysis (FEA) to predict clinical failure. Methodology Three first mandibular molars with extensive caries lesions were selected in teenager patients. The habitual occlusion bite force was measured using gnathodynamometer before and after endodontic/restoration procedures. The recorded bite forces were used as input for patient-specific FEA models, generated from cone-beam computed tomographic (CT) scans of the teeth before and after treatment. Loads were simulated using the contact loading of the antagonist molars selected based on the CT scans and clinical evaluation. Pre and post treatment bite forces (N) in the 3 patients were 30.1/136.6, 34.3/133.4, and 47.9/124.1. Results Bite force increased 260% (from 36.7±11.6 to 131.9±17.8 N) after endodontic and direct restoration. Before endodontic intervention, the stress concentration was located in coronal tooth structure; after rehabilitation, the stresses were located in root dentin, regardless of the level of tooth structure loss. The bite force used on molar teeth after pulp removal during endodontic treatment resulted in high stress concentrations in weakened tooth areas and at the furcation. Conclusion Extensive caries negatively affected the bite force. After pulp removal and endodontic treatment, stress and strain concentrations were higher in the weakened dental structure. Root canal treatment associated with direct resin composite restorative procedure could restore the stress-strain conditions in permanent young molar teeth.


Assuntos
Força de Mordida , Resinas Compostas/química , Resinas Compostas/uso terapêutico , Restauração Dentária Permanente/métodos , Dente Molar , Dente não Vital/terapia , Criança , Força Compressiva , Tomografia Computadorizada de Feixe Cônico , Análise do Estresse Dentário , Módulo de Elasticidade , Análise de Elementos Finitos , Humanos , Modelagem Computacional Específica para o Paciente , Valores de Referência , Reprodutibilidade dos Testes , Resistência à Tração , Dente não Vital/diagnóstico por imagem , Resultado do Tratamento
3.
Niger J Clin Pract ; 23(4): 489-497, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32246655

RESUMO

Objective: This prospective study aimed to evaluate the clinical performance of different restorative materials in primary molars with class II carious lesions. Materials and Methods: A total of 160 class II carious lesions (with radiographic involvement of the outer half of dentin) in 30 patients were randomly divided into four groups and restored with a glass ionomer restorative system (Equia™), two different bulk-fill composites (Sonicfill™ and X-tra fil™), and a nanohybrid composite (Filtek Z550™). The restorations were clinically and radiographically evaluated at the baseline, and 3, 6, and 12 months according to the modified United States Public Health Service criteria. Statistical analyses were performed using Pearson's Chi-square and McNemar tests. Results: After 1 year, 134 restorations were evaluated in 26 patients. Equia was statistically less successful than the other restorative materials in marginal adaptation and retention criteria (P < 0.05). However, no material was found to be superior to the others over the study period in marginal discoloration, color matching, secondary caries, anatomical form, and postoperative sensitivity (P > 0.05). Conclusion: The bulk-fill and conventional composites exhibited good clinical performance, and Equia exhibited minor changes over the 1-year trial period.


Assuntos
Resinas Acrílicas , Resinas Compostas/uso terapêutico , Restauração Dentária Permanente/métodos , Cimentos de Ionômeros de Vidro/uso terapêutico , Dióxido de Silício , Adaptação Fisiológica , Biometria , Criança , Cor , Adaptação Marginal Dentária , Materiais Dentários , Dentina , Feminino , Seguimentos , Humanos , Masculino , Dente Molar , Período Pós-Operatório , Estudos Prospectivos , Dente Decíduo , Resultado do Tratamento
4.
BMJ Case Rep ; 13(3)2020 Mar 12.
Artigo em Inglês | MEDLINE | ID: mdl-32169975

RESUMO

Mandibular incisors show variations in their root canal anatomy from regular pattern in some cases. Magnification plays a vital role to identify those unusual canal morphologies. A certain modification in access cavity preparation is required to locate those extra canals. Not only the functional restoration but also aesthetic harmony should be restored while treating anterior teeth. In these cases, post space preparation should be done with extra care to prevent vertical root fracture. This case report illustrates the importance of proper radiograph and magnification in the successful identification and management of complex canal systems in mandibular incisors.


Assuntos
Resinas Acrílicas/uso terapêutico , Resinas Compostas/uso terapêutico , Cavidade Pulpar/diagnóstico por imagem , Incisivo/lesões , Poliuretanos/uso terapêutico , Fraturas dos Dentes/diagnóstico por imagem , Coroas/normas , Cavidade Pulpar/anatomia & histologia , Estética , Humanos , Incisivo/anatomia & histologia , Masculino , Traumatismos Mandibulares/complicações , Radiografia/métodos , Tratamento do Canal Radicular/métodos , Fraturas dos Dentes/terapia , Raiz Dentária/anatomia & histologia , Resultado do Tratamento , Adulto Jovem
6.
Int. j. odontostomatol. (Print) ; 14(1): 73-80, mar. 2020. graf
Artigo em Espanhol | LILACS | ID: biblio-1056504

RESUMO

RESUMEN: La rehabilitación oral tradicional del paciente con mordida profunda y braquifacial puede ser muy compleja e invasiva, sin embargo, podría involucrar muchas especialidades para su resolución ideal. Un análisis integral estético-oclusal es necesario antes de empezar el tratamiento para hacer propuestas con el menor costo biológico, de tiempo y económico. La odontología adhesiva permite una propuesta aditiva y no invasiva como un tratamiento de mediano plazo o transitorio. Este artículo presenta un caso de una paciente de 46años de edad con mordida profunda anterior y desgaste dental severo en las caras palatinas de los dientes antero-superiores, sin disfunción temporomandibular, ni compromisos sistémicos. Se destaca la rehabilitación estética- oclusal con el mínimo compromiso biológico (ultra-conservadora), mediante restauraciones adhesivas semi-indirectas de resina compuesta con acompañamiento de 12meses. Esta propuesta rehabilitadora con resinas compuestas representa una alternativa de tratamiento para el manejo del paciente con mordida profunda anterior. El control a un año de tratamiento demostró que se siguió una secuencia y resolución que aseguró los principios de la rehabilitación oral, al mismo tiempo, se procedió de la manera menos invasiva posible.


ABSTRACT: The traditional oral rehabilitation of the patient with deep bite and brachifacial can be very complex and invasive, however, a number of treatments could be considered to improve rehabilitation. A comprehensive aesthetic-occlusal analysis is necessary prior to starting treatment in order to consider the best procedure, time involved, and economic cost. Adhesive dentistry allows an additive and non-invasive proposal as a medium-term or transitory treatment. A case of a 46-year-old patient is presented, with anterior deep bite and severe dental wear on palatal surfaces of the antero-superior teeth, without temporomandibular dysfunction, or systemic compromises. The objective was to emphasize the aesthetic and occlusal rehabilitation with the least biological commitment (ultraconservative), through semi-indirect adhesive restorations of composite resin with 12 months follow-up. This restorative proposal with composite resins represents an alternative treatment for patient management with anterior deep bite. Control at one year of treatment showed that a sequence and resolution was followed, that ensured adequate oral rehabilitation in the least invasive manner possible.


Assuntos
Humanos , Feminino , Pessoa de Meia-Idade , Resinas Compostas/administração & dosagem , Resinas Compostas/uso terapêutico , Oclusão Dentária , Restauração Dentária Permanente/métodos , Cimentos Dentários/uso terapêutico , Estética Dentária , Desgaste dos Dentes/terapia , Sobremordida/patologia
7.
Niger J Clin Pract ; 23(1): 18-25, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31929202

RESUMO

Aim: This study evaluated the microtensile bond strength (MTBS) of an orthodontic adhesive to water-aged composite surfaces using different surface treatments. Subjects and Methods: Twelve composite blocks (10 mm × 10 mm × 5 mm) were fabricated and randomly divided into two groups. Half of the specimens were stored in distilled water for 1 day, and the other specimens were stored for 30 days. The specimens were randomly assigned to six groups according to surface treatments (n = 15): Group 1, control (no treatment); Group 2, phosphoric acid; Group 3, diamond bur; Group 4, diamond bur + phosphoric acid; Group 5, laser; and Group 6, laser + phosphoric acid. One coat of orthodontic adhesive was bonded to one surface of composite blocks, and a microhybrid composite resin was bonded to the surfaces via a Teflon mold. Bond strength was evaluated using an MTBS test. Surface topography was evaluated using scanning electron microscopy (SEM) analysis. The data were analyzed using one-way analysis of variance, Tamhane post-hoc test, and independent sample t-tests (P < 0.05). Results: Bond strength values tended to decrease in all groups (with the exception of Group 2) after storage in water for 30 days (P < 0.05). Laser and diamond bur application (with or without phosphoric acid) enhanced the bond strength. Conclusions: An Er,Cr:YSGG laser application may be a feasible alternative to diamond bur for enhancing the bond strength of orthodontic adhesive to composite resin.


Assuntos
Resinas Compostas/química , Colagem Dentária , Cimentos Dentários/química , Lasers de Estado Sólido/uso terapêutico , Resistência à Tração , Água/química , Resinas Compostas/uso terapêutico , Análise do Estresse Dentário , Humanos , Teste de Materiais , Microscopia Eletrônica de Varredura , Ácidos Fosfóricos/química , Resistência ao Cisalhamento , Propriedades de Superfície
8.
J. appl. oral sci ; 28: e20190544, 2020. tab, graf
Artigo em Inglês | LILACS, BBO - Odontologia | ID: biblio-1101250

RESUMO

Abstract Objective To evaluate the influence of three levels of dental structure loss on stress distribution and bite load in root canal-treated young molar teeth that were filled with bulk-fill resin composite, using finite element analysis (FEA) to predict clinical failure. Methodology Three first mandibular molars with extensive caries lesions were selected in teenager patients. The habitual occlusion bite force was measured using gnathodynamometer before and after endodontic/restoration procedures. The recorded bite forces were used as input for patient-specific FEA models, generated from cone-beam computed tomographic (CT) scans of the teeth before and after treatment. Loads were simulated using the contact loading of the antagonist molars selected based on the CT scans and clinical evaluation. Pre and post treatment bite forces (N) in the 3 patients were 30.1/136.6, 34.3/133.4, and 47.9/124.1. Results Bite force increased 260% (from 36.7±11.6 to 131.9±17.8 N) after endodontic and direct restoration. Before endodontic intervention, the stress concentration was located in coronal tooth structure; after rehabilitation, the stresses were located in root dentin, regardless of the level of tooth structure loss. The bite force used on molar teeth after pulp removal during endodontic treatment resulted in high stress concentrations in weakened tooth areas and at the furcation. Conclusion Extensive caries negatively affected the bite force. After pulp removal and endodontic treatment, stress and strain concentrations were higher in the weakened dental structure. Root canal treatment associated with direct resin composite restorative procedure could restore the stress-strain conditions in permanent young molar teeth.


Assuntos
Humanos , Criança , Força de Mordida , Resinas Compostas/química , Dente não Vital/terapia , Restauração Dentária Permanente/métodos , Dente Molar , Valores de Referência , Resistência à Tração , Reprodutibilidade dos Testes , Resultado do Tratamento , Resinas Compostas/uso terapêutico , Dente não Vital/diagnóstico por imagem , Força Compressiva , Análise de Elementos Finitos , Análise do Estresse Dentário , Tomografia Computadorizada de Feixe Cônico , Módulo de Elasticidade , Modelagem Computacional Específica para o Paciente
9.
Artigo em Inglês | LILACS-Express | LILACS, BBO - Odontologia | ID: biblio-1101281

RESUMO

Abstract Objective: To assess the reproducibility of two clinical criteria for the evaluation of restorations in primary teeth and the impact on treatment decision. Material and Methods: A cross-sectional study was performed selecting 71 resin-based composite restorations placed in primary molars of children who had sought dental treatment at a dental school. Two trained examiners evaluated independently the restorations using modified FDI and USPHS criteria. All restorations were assessed separately with each system in random order to avoid memory bias. Kappa statistics were used to determine inter-examiner reliability considering each parameter of both criteria and score final about treatment decision. McNemar test was used to compare the treatment decision with two criteria. The significance level was set at 5%. Results: Kappa values ranged from 0.28 to 0.93 with USPHS and 0.28 to 0.88 with FDI, considering each parameter separately. Inter-examiner agreement for treatment decision was excellent for both criteria (Kappa: 0.85-0.90). For clinical decision-making, no difference between criteria was found, irrespective of examiner. Conclusion: Low inter-examiner agreement for evaluation of each parameter of USPHS and FDI criteria does not reflect on reproducibility for treatment decision. Both criteria may be suitable for evaluation of composite restorations in primary teeth.


Assuntos
Humanos , Masculino , Feminino , Criança , Dente Decíduo , Assistência Odontológica , Falha de Restauração Dentária , Tomada de Decisão Clínica , Dente Molar , Faculdades de Odontologia , Brasil , Estudos Transversais , Interpretação Estatística de Dados , Resinas Compostas/uso terapêutico
10.
Braz Oral Res ; 33: e099, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31778471

RESUMO

The aim of this clinical trial was to compare the 5-year cumulative survival of atraumatic restorative treatment restorations using high-viscosity glass-ionomer restorations (ART/HVGIC) and conventional resin composite restorations (CRT) placed in patients with intellectual and/or physical disability. Patients referred for restorative care to a special care service in Córdoba, Argentina, were recruited. Patients and/or caregivers were provided with written and verbal information regarding treatment options and selected the alternative they preferred. The treatment protocols were ART (hand instruments/HVGIC) in the clinic or CRT (rotary instrumentation/resin composite) in the clinic or under general anaesthesia (GA). Two independent, trained and calibrated examiners evaluated restoration survival using established ART codes after 6, 12, 24, 36 and 60 months. The proportional hazard model with frailty corrections provided survival estimates. Jackknife errors were used to test 5-year results. Sixty-six patients (13.6 ± 7.8 years) with 16 different medical conditions participated. CRT in the clinic proved feasible for five patients (13%), and 14 patients received CRT under GA (21%). ART was provided for 47 patients (71.2%). A total number of 298 dentine carious lesions were restored in primary and permanent teeth (182 ART; 116 CRT). Four patients died between the 3 and 5-year follow up. Percentage survival and jackknife standard error were calculated and were significantly higher for all ART/HVGIC restorations (90.2% ± 2.6) than for all CRT restorations (82.8% ± 5.3), 5 years after placement (p=0.044). These 5-year follow-up results confirm that ART/HVGIC is an effective treatment protocol for patients with disability, equal to that of conventional resin composite restoration. The results of this clinical trial support the use of ART as an evidence-based treatment resource contributing to the reduction of inequalities in access to oral health care among people with disability.


Assuntos
Resinas Compostas/uso terapêutico , Tratamento Dentário Restaurador sem Trauma/métodos , Restauração Dentária Temporária/métodos , Pessoas com Deficiência , Cimentos de Ionômeros de Vidro/uso terapêutico , Adolescente , Adulto , Criança , Pré-Escolar , Resinas Compostas/química , Falha de Restauração Dentária , Feminino , Seguimentos , Cimentos de Ionômeros de Vidro/química , Humanos , Masculino , Reprodutibilidade dos Testes , Fatores de Tempo , Resultado do Tratamento , Viscosidade , Adulto Jovem
11.
J Appl Oral Sci ; 27: e20180678, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31596369

RESUMO

OBJECTIVES: Bulk-fill restorative materials such as bulk-fill composite resins and high viscous glass ionomer cements have become very popular materials in operative dentistry because their application is easy and time-saving. The aim of this clinical study was to evaluate the clinical performance of a highly viscous reinforced glass ionomer material, a bulk-fill composite resin and a micro hybrid composite resin in Class II restorations. METHODOLOGY: In total, 109 Class II restorations were performed in 54 patients using three different restorative materials: Charisma Smart Composite (CSC); Filtek Bulk Fill Posterior Restorative (FBF); Equia Forte Fil (EF). Single Bond Universal adhesive (3M ESPE, Germany) was used with composite resin restorations. The restorations were evaluated using modified USPHS criteria in terms of retention, color match, marginal discoloration, anatomic form, contact point, marginal adaptation, secondary caries, postoperative sensitivity and surface texture. The data were analyzed using Chi-Square, Fischer's and McNemar's tests. RESULTS: At the end of one year, 103 restorations were followed up. No changes were observed during the first 6 months. At the end of one year, there were small changes in composite restorations (FBF and CSC) but no statistically significant difference was observed between the clinical performances of these materials for all criteria (p>0.05). However, there was a statistically significant difference between EF, FBF and CSC groups in all parameters except marginal discoloration, secondary caries and postoperative sensitivity in one-year evaluation (p<0.05). CONCLUSION: Bulk-fill composite resins and conventional composite resins showed more successful clinical performance than highly viscous reinforced glass ionomers in Class II cavities.


Assuntos
Resinas Compostas/uso terapêutico , Restauração Dentária Permanente/métodos , Cimentos de Ionômeros de Vidro/uso terapêutico , Adulto , Bis-Fenol A-Glicidil Metacrilato/uso terapêutico , Cárie Dentária/terapia , Adaptação Marginal Dentária , Feminino , Humanos , Masculino , Estudos Prospectivos , Reprodutibilidade dos Testes , Distribuição por Sexo , Resultado do Tratamento , Adulto Jovem
12.
Braz Oral Res ; 33(0): e089, 2019 Sep 16.
Artigo em Inglês | MEDLINE | ID: mdl-31531552

RESUMO

The objectives of this double-blind randomized clinical trial were to compare (a) the clinical times and (b) the occurrence and severity of postoperative sensitivity, of posterior restoration that used a universal adhesive, in a self-etch or selective enamel-etching technique, along with incremental or bulk-fill composites (presented in syringes or capsules). A total of 295 posterior restorations were placed according to the following groups: SETB - self-etch/bulk-fill in syringe; SETC - self-etch/bulk-fill in capsules; SETI - self-etch/incremental; SEEB - selective enamel-etching/bulk-fill in syringe; SEEC - selective enamel-etching/bulk-fill in capsules; and SEEI - selective enamel-etching/incremental. Clinical time was assessed by a reason (s/mm3) between the total volume of resin inserted and the total time required to perform the restorations. Postoperative sensitivity was evaluated using two scales (Numeric Rating Scale and Visual Analogue Scale). Mean clinical time results, analyzed by Wald's Chi-square, showed significant statistical differences among all groups (p<0.001), indicating that the restorative strategy affected the time required for the restoration. A generalized estimating equation model statistical analysis, performed to compare postoperative sensitivity, showed that neither the restorative technique, the adhesive strategy nor the presentation mode of the bulk-fill composite affected the overall risk of postoperative sensitivity (4.06 [2.22-6.81]). The use of bulk-fill composite, presented in capsules or syringes, is less time consuming and does not increase the risk or intensity of postoperative sensitivity relative to the traditional incremental technique.


Assuntos
Resinas Compostas/uso terapêutico , Restauração Dentária Permanente/efeitos adversos , Sensibilidade da Dentina/etiologia , Cápsulas , Método Duplo-Cego , Feminino , Humanos , Masculino , Complicações Pós-Operatórias/etiologia , Valores de Referência , Reprodutibilidade dos Testes , Fatores de Risco , Seringas , Fatores de Tempo , Resultado do Tratamento
13.
J Appl Oral Sci ; 27: e20180631, 2019 Aug 12.
Artigo em Inglês | MEDLINE | ID: mdl-31411263

RESUMO

OBJECTIVE: Extensive restorations in posterior teeth always bring doubts to the clinicians regarding the best protocol, mainly when structures of reinforcement were lost. OBJECTIVE: This study aimed to evaluate the effect of beveling on the fracture resistance and pattern of class II (MOD) restored teeth. METHODOLOGY: Ninety human premolars were randomly assigned into 9 groups: CTR (control/sound); NC (cavity preparation, non-restored); RU (restored, unbeveled); RTB (restored, entire angle beveling); RPB (restored, partial/occlusal beveling); EC (endodontic access/EA, non-restored); EU (EA, unbeveled); ETB (EA, entire angle beveling); EPB (EA, partial/occlusal beveling). Teeth were restored with Esthet X resin composite and stored in distilled water for 24 h before the inclusion in PVC cylinders. The axial loading tests were performed with 500 kgF at 0.5 mm/min crosshead speed until fracture of the specimens. Fracture resistance and pattern were accessed and data were analyzed using one-way ANOVA and Tukey's HSD test (α=0.05). RESULTS: Mean (±SD) failure loads ranged from 136.56 (11.62) to 174.04 (43.5) kgF in the groups tested without endodontic access. For endodontically accessed teeth, fracture resistance ranged from 95.54 (13.05) to 126.51 (19.88) kgF. Beveling of the cavosurface angle promoted the highest fracture resistance values (p<0.05) and prevented catastrophic fractures. CONCLUSIONS: Cavosurface angle beveling is capable of improving fracture resistance and pattern for both endodonticaly accessed and non-accessed teeth.


Assuntos
Dente Pré-Molar , Preparo da Cavidade Dentária/métodos , Restauração Dentária Permanente/métodos , Análise de Variância , Resinas Compostas/uso terapêutico , Humanos , Distribuição Aleatória , Valores de Referência , Reprodutibilidade dos Testes , Fatores de Risco , Fraturas dos Dentes , Dente não Vital , Resultado do Tratamento
14.
Clin Exp Dent Res ; 5(4): 413-419, 2019 08.
Artigo em Inglês | MEDLINE | ID: mdl-31452952

RESUMO

Increased concerns about the safety of amalgam restorations in children have resulted in many dental schools emphasizing the teaching of alternative dental materials. This study investigated the current teaching of different dental materials for use in posterior teeth in the United States predoctoral pediatric dentistry programs. In 2011, the authors invited the chairs of the predoctoral pediatric dentistry departments in all accredited dental schools at that time (N = 57) to participate in an internet-based survey. Descriptive statistics were calculated to describe the frequency of using different restorative materials. Regression models were developed to explore the factors related to the use of dental restorations in predoctoral pediatric clinics. Among the 44 dental schools that responded (77% response rate), 74% used amalgam, and 93% used composite in primary posterior teeth. Glass ionomer was used by 61% of the schools in primary posterior teeth. Placing amalgam in primary posterior teeth was associated with programs that treated more 3-5-year-old patients (ß = .302, p < .043), whereas the use of glass ionomer was associated with having students serving at off-site satellite dental clinics (ß = .015, p < .012). In general, having departments with chairs who had positive attitudes towards Minimal Invasive Dentistry (MID) used composite (ß = .091, p < .0001) and glass ionomer (ß = 103, p < .0001) more frequently and were less likely to use amalgam (ß = -.077, p < .005) in primary posterior teeth. Although teaching MID concepts in predoctoral pediatric clinics in dental schools is increasing, the use of amalgam in posterior primary and permanent teeth is still widely practiced.


Assuntos
Amálgama Dentário/uso terapêutico , Dentística Operatória/tendências , Educação em Odontologia/tendências , Odontopediatria/tendências , Resinas Acrílicas/uso terapêutico , Adolescente , Criança , Pré-Escolar , Resinas Compostas/uso terapêutico , Clínicas Odontológicas/estatística & dados numéricos , Clínicas Odontológicas/tendências , Dentística Operatória/educação , Dentística Operatória/métodos , Dentística Operatória/estatística & dados numéricos , Educação em Odontologia/estatística & dados numéricos , Humanos , Odontopediatria/educação , Odontopediatria/métodos , Odontopediatria/estatística & dados numéricos , Faculdades de Odontologia/estatística & dados numéricos , Faculdades de Odontologia/tendências , Dióxido de Silício/uso terapêutico , Dente Decíduo , Estados Unidos
15.
J Dent ; 89: 103183, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-31449840

RESUMO

OBJECTIVES: The aim of this study was to assess the prevalence of direct restorations in posterior teeth in children aged 12, from a birth cohort, and to test the association between the quality of the restorations and individual variables experienced in the life cycle. METHODS: All live-born children in Pelotas, in 2004, were prospectively investigated and a representative sample was assessed for oral conditions at ages 5 and 12. The outcome was the quality of the restoration (satisfactory/unsatisfactory). Independent variables included socioeconomic, behavioral and oral health characteristics at the individual level and the size of cavity and material at the tooth level. Associations were tested using multilevel logistic regression models. RESULTS: A total of 1,000 participants and 249 restorations in the permanent dentition were examined. Most of the restorations were composites (73.5%), while only 6.8% were amalgam. After adjusted analyses, children whose parents received information on how to prevent their child from developing caries before reaching 5 years of age had 91.0% less chance of having an unsatisfactory restoration compared to children whose parents never received information (OR = 0.09; 95% CI 0.01-0.59). Also, the chances of presenting unsatisfactory restorations were 5.3 higher in children at high-risk for untreated dental caries in the permanent dentition, in comparison with children at low risk (OR = 5.32; 95% CI 1.07-26.6). CONCLUSIONS: Low-risk for untreated dental caries and having received information on preventing dental caries, reduced the chance of presenting failed restorations, showing that factors related to individuals play an important role in the quality of restorations. CLINICAL SIGNIFICANCE: Our findings highlight the role that individual-related factors play in restoration longevity in children, reinforcing the need for a patient-centered approach in restorative dentistry.


Assuntos
Resinas Compostas/uso terapêutico , Amálgama Dentário/uso terapêutico , Cárie Dentária/terapia , Falha de Restauração Dentária , Restauração Dentária Permanente/métodos , Adolescente , Criança , Pré-Escolar , Estudos de Coortes , Resinas Compostas/efeitos adversos , Amálgama Dentário/efeitos adversos , Restauração Dentária Permanente/efeitos adversos , Humanos
16.
Braz Oral Res ; 33: e54, 2019 Jul 29.
Artigo em Inglês | MEDLINE | ID: mdl-31365703

RESUMO

The aim of present study was to estimate the occurrence and associated factors for replacement of amalgam posterior restorations. A representative sample of all 5,914 births from the 1982 in Pelotas birth cohort study was prospectively investigated, and the posterior restorations were assessed at 24 (n = 720) and 31 years of age (n = 539). Individual-level variables, i.e., demographic characteristics, socio-economic factors, oral health conditions and use of dental services, were collected from different waves of the cohort. Tooth-level variables included dental group, estimated time in mouth of each amalgam restoration, and number of restored dental surfaces. Thus, 246 individuals presented 718 amalgam restorations at 24 years of age. After 7 seven years of follow-up, 18.9% of these restorations had been replaced with composite resins. Multilevel Poisson regression models showed that, compared to white individuals, blacks presented a lower risk of replacement of amalgam restorations for composite resins (IRR - 0.39 [0.16-0.95]). Individuals with high educational level at age 31 showed an increased likelihood of replacement of amalgam restorations. Therefore, skin color affects the replacement of amalgam for composite resin in posterior restorations.


Assuntos
Resinas Compostas/uso terapêutico , Amálgama Dentário/uso terapêutico , Reparação de Restauração Dentária/estatística & dados numéricos , Pigmentação da Pele , Adulto , Fatores Etários , Brasil , Estética Dentária/estatística & dados numéricos , Feminino , Humanos , Masculino , Satisfação do Paciente/estatística & dados numéricos , Distribuição de Poisson , Estudos Prospectivos , Medição de Risco , Fatores de Risco , Fatores Socioeconômicos , Resultado do Tratamento , Adulto Jovem
17.
J Dent ; 88: 103163, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-31276747

RESUMO

OBJECTIVES: Although there is some consensus that carious lesions in early stages (non-cavitated) could be treated using sealants, neither the type of materials nor their use in lesions with localized enamel breakdown (microcavitated) has been reported To compare the efficacy of resin or glass ionomer (GI) sealants in arresting microcavitated carious lesions (ICDAS 3) in first permanent molars. MATERIALS AND METHODS: A double-blinded randomized controlled clinical trial was conducted in 41 healthy 6 to 11-year-old children. At the baseline examination, each subject had at least one carious lesion classified as ICDAS 3 on the first permanent molar. One hundred fifty-one lesions were randomized into: Group 1: resin sealants (76 lesions) and Group 2: GI sealant (75 lesions). Carious lesion progression was assessed clinically and radiographically. Progression and retention failure were the outcomes used for group comparisons at p-value<0.05. RESULTS: After a two-year follow-up, only one lesion progressed to ICDAS 5, without statistically significant differences between the groups (χ2(1) = 0.90, p = 0.53). Radiographically, 100 lesions (98%) were arrested and 2 (2%) showed radiographic progression, without differences between groups (χ2(1) = 0.93, p = 0.93). At 2 years, complete retention was observed in 77% of the resin-based and in 83% of the GI sealants, without statistical differences between type of sealant (χ2(1) = 0.71, p = 0.48). The multilevel mixed model demonstrated that location and type of sealant did not affect retention rates (χ2(1) = 24,98, p < 0.001). CONCLUSION: Sealing ICDAS 3 carious lesions in permanent molars appears to be effective in arresting lesions after a two-year follow-up. Clinicaltrials.gov: RCTICDAS3/2015. CLINICAL SIGNIFICANCE: Minimally invasive approaches for carious lesion management have been promoted. Using sealants for the treatment of microcavitated lesions (ICDAS 3) appears predictable in the routine practice, without predilection for resin or glass ionomer materials. In addition to preserving tooth structure, this strategy reduces chair-time, dental fear and costs, and increases coverage to dental care.


Assuntos
Resinas Acrílicas/uso terapêutico , Cárie Dentária/prevenção & controle , Cimentos de Ionômeros de Vidro/uso terapêutico , Selantes de Fossas e Fissuras/uso terapêutico , Resinas Acrílicas/química , Criança , Resinas Compostas/química , Resinas Compostas/uso terapêutico , Método Duplo-Cego , Cimentos de Ionômeros de Vidro/química , Humanos , Dente Molar/patologia , Selantes de Fossas e Fissuras/química , Dióxido de Silício
18.
Niger J Clin Pract ; 22(6): 782-789, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-31187762

RESUMO

Objective: The aim of this in vitro study was to investigate the fracture strength and cuspal deflection of endodontically treated premolars restored using different composite resins along with or without fiber post application. Materials and Method: Eighty intact premolars were randomly divided into eight groups (n = 10); CO group: intact teeth (control), OPR group: mesio-occlusal-distal-palatal (MODP) preparation (OPR) + endodontic treatment (ET), TC group: MODP preparation + ET + Tetric N-Ceram, TB group: MODP preparation + ET + Tetric EvoCeram Bulk Fill, SO group: MODP preparation + ET + SonicFill 2, TC-P group: MODP preparation + ET + Hahnenkratt glass fiber post + Tetric N-Ceram, TB-P group: MODP preparation + ET + Hahnenkratt glass fiber + Tetric EvoCeram Bulk Fill, and SO-P Group: MODP preparation + ET + Hahnenkratt glass fiber post + SonicFill 2. After thermocycling, specimens were subjected to a compressive load until fracture. Data were analyzed using analysis of variance and Tukey tests (P < 0.05). Results: The mean fracture strength of groups which received post treatment showed similar fracture strength values [TC-P (931.6 ± 97.9), TB-P (882.0 ± 59.7), SO-P (862.0 ± 143.0) (P > 0.05)] and was significantly higher than OPR (530.6 ± 41.7), TC (841.2 ± 93.1), TB (774.5 ± 101.8), and SO (735.0 ± 178.01) groups (P < 0.05). No significant difference was detected among groups considering cuspal deflection (P > 0.05). The fiber post insertion resulted in more unfavorable fractures. Conclusion: Endodontically treated teeth restored with fiber post and bulk-fill or conventional composite resins demonstrated fracture strength values similar to intact teeth.


Assuntos
Resinas Compostas/uso terapêutico , Restauração Dentária Permanente/instrumentação , Vidro , Dente não Vital/terapia , Dente Pré-Molar/lesões , Força Compressiva , Análise do Estresse Dentário , Resistência à Flexão , Humanos , Teste de Materiais , Distribuição Aleatória , Fraturas dos Dentes/etiologia , Preparo do Dente/métodos
19.
Photobiomodul Photomed Laser Surg ; 37(5): 318-324, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-31084557

RESUMO

Objective: The aim of the study was to compare the composite adaptation of three systems by using cross-polarization optical coherence tomography (CP-OCT). Background data: Most polymer-based restorations suffer from polymerization shrinkage that affects the interfacial seal. This shrinkage cannot be detected by conventional X-ray methods. Optical coherence tomography was proved to be a reliable non-invasive imaging tool to examine biological structures and biomaterials at micron scale. Methods: Twenty-four cylindrical class-V cavities were prepared on the buccal surfaces of the extracted human molars. After cavity preparation, samples were randomly divided into three groups (n = 8) according to the restoration system: one-step self-etch Clearfil Tri-S Bond Plus with Clearfil Majesty ES-2 composite (TS; Kuraray Noritake Dental), Single Bond Universal in self-etch mode with Filtek Z350 XT composite (SB; 3M ESPE), and one-step self-etch Plafique Bond with Plafique LX 5 composite (PB; Tokuyama Dental). The restoration placement was carried out according to the manufacturers' recommendations. Later, the specimens were immersed in a contrasting agent; then, image acquisitions were taken by CP-OCT to calculate the adaptation percentage by using an image analysis software. Results: Mann-Whitney U test showed no statistical significant difference in the adaptation percentage between TS (91.72 ± 11.6) and SB (93.43 ± 6.9) groups (p > 0.05). However, the adaptation percentage in PB (41.83 ± 28.5) was significantly lower than in the other tested groups (p < 0.05). Conclusions: Within the limitation of the study, TS and SB groups showed better adaptation than PB. Moreover, CP-OCT is a useful imaging tool that can display composite adaptation at micron scale.


Assuntos
Resinas Compostas/uso terapêutico , Cárie Dentária/diagnóstico por imagem , Cárie Dentária/terapia , Restauração Dentária Permanente , Cimentos de Resina/uso terapêutico , Preparo da Cavidade Dentária , Humanos , Técnicas de Cultura de Tecidos , Tomografia de Coerência Óptica
20.
Biomed J ; 42(1): 53-58, 2019 02.
Artigo em Inglês | MEDLINE | ID: mdl-30987706

RESUMO

BACKGROUND: Restoration of the teeth with extensive root canals with different post systems is a challenge for clinicians. Evaluation of these systems is important for clinical success. The aim of this study was to compare the fracture resistance and fracture mode of endodontically treated thin-walled teeth which restored with different post systems. METHODS: Eighty extracted and endodontically treated maxillary canines were divided into 4 groups (n = 20) and the thickness of the radicular dentin walls was reduced by using diamond burs. Each root was embedded in an autopolymerizing resin with a 0.25 mm layer of vinyl polysiloxane material to simulate the periodontal ligament. The subgroups were restored with one of the following post systems: only composite resin (Group 1), cast post (Group 2), glass-fiber post (Group 3), and I-TFC post (Group 4). The samples were subjected to a gradually increasing force (0,5 mm/min). The force required to fracture was recorded, and the data were analyzed with ANOVA, Tukey test's and Chi-Square test (p < 0.05). RESULTS: The highest fracture resistance was recorded for Group 2, followed by the Group 3, Group 4, and Group 1. Differences in the fracture resistance of teeth were significant among the groups (p < 0.05). The fracture resistance of Group 4 was significantly different than the other tested post systems (p < 0.05). CONCLUSIONS: The lowest fracture resistance was recorded for Group 1, but among all post systems, Group 4 had the lowest fracture resistance. The fracture mode of the fiber posts (Radix and I-TFC posts) would permit repair of the tooth.


Assuntos
Resinas Compostas/uso terapêutico , Fraturas Ósseas/terapia , Incisivo/cirurgia , Cimentos de Resina/uso terapêutico , Fixação de Fratura/métodos , Vidro , Humanos , Raiz Dentária/cirurgia
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