3 research outputs found
Comparison of Flouride Release in three banding adhesives-an invitro study
No full textPurpose: The aim of this in vitro study was to estimate the amount of fluoride release from three different band adhesives(FUJI ORTHOBAND,TP GLASSSIONOMER BAND CEMENT, 3M MULTICURE BAND CEMENT),using the ion selective electrode method over a span of five weeks.Methods: A total number of thirty samples measuring 10 mm diameter and 1 mm height in each group were fabricated using a stainless steel mold and were stored in fifty ml deionized water. The fluoride analysis were carried out using the ion specific electrode for first seven days and there after every week end for four subsequent weeks. 0.5 ml of the test solution was mixed with equal amount of TISAB solution and the ion selective electrode is placed in the solution and the read out is made from the digital meter. Statistical analysis were carried out with one way ANOVA.Results: Results showed that all the three band cements released significant amount of fluoride ions. TP GLASS IONOMER CEMENT released the highest amount of fluoride over the entire five-week period followed by 3M MULTICURE BAND CEMENT and FUJI ORTHOBAND. Hence, all the three band adhesives may prove to be effective long term fluoride releasing materials
Improved electroluminescence in organic light emitting diodes by thermal annealing of indium tin oxide anode
No full textA Comparative Evaluation Of Shear Bond Strength Of Metallic Brackets Bonded After 15 – 30, Or 60 Second Etching And Correlation Of Adhesive Remnant Index With Etch Time – An In Vitro Study
No full text Direct bonding of orthodontic attachments has become a clinical reality, with the application of the acid etch technique, using ortho phosphoric acid. Depth of the etch or the amount of surface enamel removed during the etching procedure depends on the concentration of the acid and the etching time. The present study was designed to evaluate the shear bond strength of metallic brackets at the various etch time of 15-30 or 60 seconds. Etching with phosphoric acid was known to produce dissolution of the outermost enamel layer and provides mechanical attachments for bonded orthodontic brackets. However, the debonding and subsequent cleanup procedure at the end of treatment may be rather time consuming. Also, care must be taken not to induce iatrogenic effects. Ideally in orthodontics a bond is said to be ideal when the bond failure occurs at the enamel composite interface because debonding and subsequent polishing of tooth would cause least damage to the enamel surface. Several recent reports have indicated that a traditional acid etching time of 60 seconds should be reduced to 15 seconds without causing damage to the enamel surface or decreasing shear bond strength (i.e. shear bond of 6-8 Mpa), the purpose of the study is to keep the factors such as the acid concentration at 37%, age of tooth 9 to 16 years and no pre treatment condition of tooth as constant and the etching time alone is varied and its influence on shear bond strength of metallic brackets and its correlation with Adhesive Remnant Index (ARI) are studied. The results have shown that clinically adequate bond strength can be achieved at the lower etching time of 15 seconds with minimal iatrogenic damage to natural tooth structure. 
