Assuntos
Restauração Dentária Permanente/métodos , Condicionamento Ácido do Dente/métodos , Resinas Compostas/química , Assistência Odontológica Integral/métodos , Colagem Dentária/métodos , Cárie Dentária/terapia , Materiais Dentários/química , Capeamento da Polpa Dentária/métodos , Exposição da Polpa Dentária/terapia , Restauração Dentária Permanente/instrumentação , Dentina/ultraestrutura , Adesivos Dentinários/química , Humanos , Lasers Semicondutores/uso terapêutico , Terapia com Luz de Baixa Intensidade/métodos , Bandas de Matriz , Agentes de Capeamento da Polpa Dentária e Pulpectomia/uso terapêuticoRESUMO
INTRODUCTION: The purpose of this study was to investigate the association between dye and bacterial penetration through interim restorations used during endodontic treatment. METHODS: Sixty-four extracted human teeth were used, with 2 teeth each as positive and negative controls. Endodontic access with a mesio-occluso-distal cavity was prepared. Palatal cusps of maxillary molars and buccal cusps of mandibular molars were removed. Cotton was placed over the canals and covered with Cavit. Thirty teeth were restored with Ketac Silver (KS) and 30 with KS reinforced with a stainless steel band (KSSB). Samples were submersed in India ink mixed with brain heart infusion broth containing Streptococcus gordonii. After 3 months of simulated chewing, structural integrity and dye and bacterial penetration were assessed. RESULTS: Positive controls had both dye and bacterial penetration. Negative controls had no dye or bacterial penetration. All KS restorations debonded, whereas 18 KSSB restorations (60%) debonded. KS restorations were 1.67 times more likely to debond than KSSB restorations (Fisher exact test). KS was 1.3 times more likely to have dye penetration than KSSB (Fisher exact test) and 3 times more likely to have bacterial penetration, although not statistically significant (chi(2) test). Overall, 88.3% of specimens had dye penetration, and 20% had bacterial penetration. This 68.3% difference indicated no association between dye and bacterial penetration (exact McNemar test). CONCLUSIONS: Stainless steel bands helped maintain structural integrity of KS restorations under masticatory function. Bands helped prevent dye penetration but not bacterial penetration. There was no association between dye and bacterial penetration.
Assuntos
Corantes , Infiltração Dentária/diagnóstico , Restauração Dentária Temporária/métodos , Tratamento do Canal Radicular , Sulfato de Cálcio , Cimentos Cermet , Cimentos Dentários , Análise do Estresse Dentário , Combinação de Medicamentos , Humanos , Mastigação , Bandas de Matriz , Dente Molar , Polivinil , Aço Inoxidável , Óxido de ZincoRESUMO
AIM: The aim is to investigate possible differences in discomfort during treatment with the atraumatic restorative treatment (ART) or the Conventional restorative method with and without local analgesia (LA). METHODS: The study group consisted of 6 and 7 year old children with no dental experience (mean age 6.98, SD +/- 0.52) randomly divided into four treatment groups: Conventional method with and without LA and ART with and without LA. One or two proximal lesions in primary molars were treated. The heart rate and the behaviour (Venham) were measured. STATISTICS: Statistical analysis was performed in SPSS version 10.0. RESULTS: In a first session 300 children were treated and 109 children for a second time in the same way as at the first visit. During the first session ART without LA gave the least discomfort while the Conventional method without LA gave the most discomfort. During the second treatment the least discomfort was observed with ART without LA and the most discomfort in the Conventional way with LA. CONCLUSION: There is a constant preference for hand instruments; the bur is increasingly accepted. The experience with LA is the reverse.