Are antibacterial component additions in etchants and adhesives effective against Streptococcus Mutans?

WOS: 000428110500007The aim was to investigate the antibacterial activity of various acids and adhesives with and without antibacterial components against Streptococcus mutans. The antibacterial activities of 35% phosphoric acid (Ultra-Etch), 37% phosphoric acid with benzalkonium chloride (Etch-37), adhesive with chlorhexidine (Peak Universal Bond) and without any agent (PQ1) were investigated by agar-diffusion test. The inhibition-zones were measured after 48 h of incubation. For the tooth-cavity model test; cylindrical cavities were prepared on occlusal dentin surfaces of human molars and divided into four groups (n = 10 cavity/group). Group 1: Ultra-Etch + Peak Universal Bond, Group 2: Ultra-Etch + PQ1, Group 3: Etch-37 + PQ1 were applied. The fourth group without any agent application served as control. The teeth were immersed in 5.8 x 10(6) cfu/ml of S. mutans solution to infect the cavities for 72 h before the application of the groups. After 72 h, dentin chips were collected from the cavity walls with burs for bacterial counting. Statistical analysis was performed by ANOVA, Bonferroni and Dunnett C tests (p < 0.05). Ultra-Etch and Etch-37 performed similar antibacterial activities in agar-diffusion test. Both acids showed better antibacterial activity compared to adhesives (p < 0.05). The antibacterial activity of PQ1 and Peak Universal Bond was observed to be inactivated by light-polymerization. According to the tooth-cavity model; Group I, II, and III demonstrated reduction in bacterial number and there was no significant difference between them. Antibacterial component additions in etchant and adhesive did not show superior antibacterial activity against S. mutans in both in vitro tests

In vitro abrasion of resin-coated highly viscous glass ionomer cements: a confocal laser scanning microscopy study

The aim of this study was to evaluate the effect of resin coating on the wear depth of highly viscous glass ionomer cements (HVGICs) after 40,000 cycles, corresponding to over 8 years of tooth brushing

Long-term antibacterial effects and physical properties of a chlorhexidine-containing glass ionomer cement

WOS: 000252712800007PubMed ID: 18237338Statement of the Problem: Many regions in the world do not have electricity, water, or access to dental facilities that allows the treatment of caries with dental handpieces and rotary burs. For restorative techniques used in these regions, an antibacterial self-adherent glass ionomer material would contribute considerably. Purpose: This study aimed to test if chlorhexidine diacetate (Fluka BioChemika, Buchs, Switzerland)- or chlorhexidine digluconate (Sigma-Aldrich, Steinheim, Germany)-added ChemFil Superior glass ionomer cement (Dentsply DeTrey, Konstanz, Germany) had any long-term antibacterial effect against certain oral bacteria and to test the new formulation's physical properties. Materials and Methods: ChemFil Superior was used as a control. Chlorhexidine diacetate (powder) was added to the powder and chlorhexidine digluconate (liquid) was mixed with the powder in order to obtain 0.5, 1.25, and 2.5% concentrations of the respective groups. Setting time, compressive strength, and acid erosion were tested according to ISO 9917-1. Working time, hardness, diametral tensile strength, and biaxial flexural strength were also determined. Long-term antimicrobial activity against S. mutans, L. acidophilus, and C. albicans were tested with the agar diffusion method. Analysis of variance (ANOVA) was used for comparison (p < 0.05). Results: Regarding the immediate antibacterial effect for S. mutans, all the tested groups showed inhibitions of the strain compared with the control group (p < 0.05), with larger zones for the higher concentration groups and all the diacetates. For L. acidophilus, all the groups were effective compared with the control, but the greatest antibacterial effect was observed with the 2.5% diacetate group. The 2.5% group of chlorhexidine diacetate showed antibacterial activity up to 90 days against S. mutans and up to 60 days against L. acidophilus. The working and setting time, acid erosion test, diametral tensile strength, and biaxial flexural strength of the tested groups were not different from the control ChemFil group. However, the 1.25 and 2.5% groups of chlorhexidine diacetate had significantly lower compressive strengths than the control group. Lower hardness values were obtained with the 0.5 and 2.5% chlorhexidine digluconate groups in comparison with the control group

Direkt ve indirekt yöntemle yapılan kompozit rezin laminate veneer restorasyonların klinik değerlendirilmesi: 1 yıllık kontrol

INTRODUCTION: the objective was to evaluate one year clinical performance of composite veneers applied with different techniques. METHODS: the first 15 teeth were restored with an indirect technique with Esthet•X HD (Dentsply DeTrey, Konstanz, Germany), the next 15 teeth were restored with a direct approach with Ceram•X duo (Dentsply DeTrey). At baseline, 6 and 12 months, the restorations were evaluated using modified Ryge criteria, pocket depth, plaque index and gingival index. Mann Whitney U test was used in evaluating clinical criteria. Friedman test was used for pocket depth measures. Differences in plaque and gingival index were analysed by Fisher’s exact test and Proportions test. RESULTS: Regarding Mann Whitney U test, only the marginal discoloration criteria was statistically significantly different between the groups (p?0.05). in the indirect group, the pocket depth and gingival index scores were increased at 6 month recall and these increases were statistically significant (p?0.05). Direct technique was found to be statistically significantly better than the indirect technique (p?0.05). DISCUSSION AND CONCLUSION: Based on the findings of this study, both composite veneer techniques may be a good treatment option for patients with esthetic problems in anterior teeth. However, early discoloration rate, complex approach with preparation, impression and luting are the disadvantages for indirect technique.GİRİŞ ve AMAÇ: Bu çalışmanın amacı, farklı tekniklerle uygulanan kompozit rezin laminate veneer (RLV) restorasyonların bir yıllık klinik performansını değerlendirmektir. YÖNTEM ve GEREÇLER: İlk 15 diş, Esthet•X HD (Dentsply DeTrey, Konstanz, Almanya) ile indirekt kompozit RLV restorasyonlarla; sonraki 15 diş Ceram•X Duo (Dentsply DeTrey) ile direkt kompozit RLV restorasyonlarla restore edildi. Başlangıç, 6 ve 12 ayda restorasyonlar modifiye Ryge kriterleri, cep derinliği, plak indeksi ve diş eti indeksi kullanılarak değerlendirildi. Klinik kriterlerin değerlendirilmesinde Mann Whitney U testi kullanıldı. Cep derinliği ölçümleri için Friedman testi kullanıldı. Plak ve diş eti indeksindeki farklılıklar Fisher’in kesin testi ve Oran karşılaştırmaları testi ile analiz edildi. BULGULAR: Mann Whitney U testi sonucunda, gruplar arasında sadece kenar renklenmesi kriterinde istatistiksel olarak anlamlı fark bulundu (p?0.05). İndirekt grupta 6. ay kontrolünde cep derinliği ve gingival indeks skorları arttı, bu artış istatistiksel olarak anlamlı bulundu (p?0.05). Bu kriterlere göre direkt tekniğin indirekt teknikten istatistiksel olarak anlamlı ölçüde daha iyi olduğu tespit edildi (p?0.05). TARTIŞMA ve SONUÇ: Bu çalışmanın bulgularına dayanarak, her iki teknikle yapılmış kompozit RLV restorasyonlar anterior dişlerde estetik problemi olan hastalarda iyi birer tedavi seçeneği olabilir. Ancak erken dönem kenar renklenmesi, preparasyon, ölçü ve yapıştırma aşamasındaki zorluklar indirekt tekniğin dezavantajları olarak karşımıza çıkmaktadır

Are antibacterial component additions in etchants and adhesives effective against Streptococcus Mutans?

WOS: 000428110500007The aim was to investigate the antibacterial activity of various acids and adhesives with and without antibacterial components against Streptococcus mutans. The antibacterial activities of 35% phosphoric acid (Ultra-Etch), 37% phosphoric acid with benzalkonium chloride (Etch-37), adhesive with chlorhexidine (Peak Universal Bond) and without any agent (PQ1) were investigated by agar-diffusion test. The inhibition-zones were measured after 48 h of incubation. For the tooth-cavity model test; cylindrical cavities were prepared on occlusal dentin surfaces of human molars and divided into four groups (n = 10 cavity/group). Group 1: Ultra-Etch + Peak Universal Bond, Group 2: Ultra-Etch + PQ1, Group 3: Etch-37 + PQ1 were applied. The fourth group without any agent application served as control. The teeth were immersed in 5.8 x 10(6) cfu/ml of S. mutans solution to infect the cavities for 72 h before the application of the groups. After 72 h, dentin chips were collected from the cavity walls with burs for bacterial counting. Statistical analysis was performed by ANOVA, Bonferroni and Dunnett C tests (p < 0.05). Ultra-Etch and Etch-37 performed similar antibacterial activities in agar-diffusion test. Both acids showed better antibacterial activity compared to adhesives (p < 0.05). The antibacterial activity of PQ1 and Peak Universal Bond was observed to be inactivated by light-polymerization. According to the tooth-cavity model; Group I, II, and III demonstrated reduction in bacterial number and there was no significant difference between them. Antibacterial component additions in etchant and adhesive did not show superior antibacterial activity against S. mutans in both in vitro tests