RESUMO
OBJECTIVES: This study evaluated the dentine bond strength (BS) and the antibacterial activity (AA) of six adhesives against strict anaerobic and facultative bacteria. METHODS: Three adhesives containing antibacterial components (Gluma 2Bond (glutaraldehyde)/G2B, Clearfil SE Protect (MDPB)/CSP and Peak Universal Bond (PUB)/chlorhexidine) and the same adhesive versions without antibacterial agents (Gluma Comfort Bond/GCB, Clearfil SE Bond/CSB and Peak LC Bond/PLB) were tested. The AA of adhesives and control groups was evaluated by direct contact method against four strict anaerobic and four facultative bacteria. After incubation, according to the appropriate periods of time for each microorganism, the time to kill microorganisms was measured. For BS, the adhesives were applied according to manufacturers' recommendations and teeth restored with composite. Teeth (n=10) were sectioned to obtain bonded beams specimens, which were tested after artificial saliva storage for one week and one year. BS data were analyzed using two-way ANOVA and Tukey test. RESULTS: Saliva storage for one year reduces the BS only for GCB. In general G2B and GCB required at least 24h for killing microorganisms. PUB and PLB killed only strict anaerobic microorganisms after 24h. For CSP the average time to eliminate the Streptococcus mutans and strict anaerobic oral pathogens was 30 min. CSB showed no AA against facultative bacteria, but had AA against some strict anaerobic microorganisms. CONCLUSIONS: Storage time had no effect on the BS for most of the adhesives. The time required to kill bacteria depended on the type of adhesive and never was less than 10 min. CLINICAL SIGNIFICANCE: Most of the adhesives showed stable bond strength after one year and the Clearfil SE Protect may be a good alternative in restorative procedures performed on dentine, considering its adequate bond strength and better antibacterial activity.
Assuntos
Adesivos/farmacologia , Anti-Infecciosos/farmacologia , Bactérias/efeitos dos fármacos , Dentina/química , Adesivos/química , Anti-Infecciosos/química , Resinas Compostas , Colagem Dentária , Cimentos Dentários , Humanos , Cimentos de Resina/química , Cimentos de Resina/farmacologia , Resistência à TraçãoRESUMO
Várias são as queixas estéticas relatadas pelos pacientes e as mais comuns são a presença de diastemas, do sorriso gengival, da ausência de papilas, do formato dental inadequado (como dentes conóides e caninos movimentados ortodonticamente na posição de incisivos laterais) e do escurecimento dental. Promover uma aparência gengival estética envolve o restabelecimento da saúde gengival e periodontal. Transformar caninos em incisivos laterais é um desafio, pois, na maioria dos casos, é necessária uma intervenção cirúrgica periodontal para alinhamento do contorno gengival e diminuição do volume cervical para produzir um melhor perfil de emergência. O objetivo deste artigo foi descrever um caso clínico, que envolveu as disciplinas da periodontia e da dentística restauradora no planejamento do caso. O sucesso do tratamento depende da perfeita integração entre tecidos moles e duros, que é derivada da abordagem multidisciplinar, fundamental para a obtenção dos resultados estéticos esperados.
Diastema between anterior teeth, "gummy smile", the loss of interdental papilla, inadequate dental proportions ("peg-shaped teeth" and maxillary canine transposed into the space left by the missing lateral incisor) and discoloration of anterior tooth cause great discomfort for the patient. The key to achieving pleasing gingival and oral health involve a careful examination of the smile line and in many cases, the treatment of periodontal disease. Composite resin material can be added to change the canine into the missing lateral incisor, however, this procedure is a hard task because in most of cases is necessary periodontal surgery intervention to improve the gingival contours, to reduce the cervical volume at buccal surface of canines, which result in better emergence profile. The present article describes a clinical case where there is an interdisciplinary correlation between Periodontal Surgery and the Restorative Dentistry. Adequate treatment planning, involving multidisciplinary approach applied to the smile reconstruction is required to ensure the development of appropriate esthetics.
Assuntos
Humanos , Feminino , Adulto , Estética Dentária , Periodontia , Resinas CompostasRESUMO
O objetivo deste estudo foi avaliar as características de obliteração dos túbulos dentinários de três agentes dessensibilizantes: produto a base de oxalato de potássio / Oxa-Gel (OX), produto a base de HEMA e glutaraldeído / Gluma Desensitizer (GD) e produto a base de flúor-fosfato acidulado / Nupro Gel (AF). A região vestibular e cervical de vinte e quatro terceiros molares humanos extraídos foi planificada e polida com lixas de SiC e pastas de diamante para simular superfícies vestibulares dentinárias cervicais com hipersensibilidade. Os dentes foram aleatoriamente divididos em quatro grupos (n=6), de acordo com os seguintes tratamentos superficiais da dentina: G1: sem tratamento; G2: OX; G3: GD; G4: AF. Os espécimes foram fraturados no sentido línguo-vestibular e preparados para microscopia eletrônica de varredura (MEV). OX promoveu oclusão pela deposição de cristais no interior dos túbulos. Enquanto, GL criou uma camada delgada sobre a superfície da dentina, a aplicação do AF produziu a formação de precipitados que ocluíram os túbulos. De acordo com a análise em MEV, todos agentes dessensibilizantes testados foram capazes de obliterar túbulos dentinários.
Assuntos
Humanos , Sensibilidade da Dentina , Fluoreto de Fosfato Acidulado , Glutaral , Dente Serotino , OxalatosRESUMO
The aim of this study was to evaluate the features of dentinal tubules occlusion following application of three commercially available desensitizing agents: potassium oxalate-based / Oxa-Gel (OX), HEMA and glutaraldehyde-based / Gluma Desensitizer (GD) and acidulated phosphate fluoride-based / Nupro Gel (AF). Buccal cervical areas of twenty-four extracted human third molars were smoothed and wet-polished with SiC papers and diamond pastes, in order to simulate the clinical aspect of hypersensitive dentin cervical surfaces. The teeth were randomly divided into four groups (n=6), according to the dentin surface treatments: G1: untreated; G2: OX; G3: GD; G4: AF. Specimens were fractured in the lingual-buccal direction and prepared for SEM analysis. OX promoted tubule occlusion by crystal-like deposits in the lumen of the tubules. While GL created a thin layer over the dentin surface, AF application produced precipitates that occluded the tubules. According to the SEM analysis, all desensitizing agents were able to occlude the dentinal tubules.