00000nam a22000004a 4500 UP-1686042739784946199 Buklod 20240521111413.0 m |o d | cr ||||||||||| 240506s2023 xxu r |||| u|eng d UPDent rda eng LG993.5 2023 D4 S53 Siao, Michael C. The Effect of Curing Tip Contaminants and Curving Duration on the Depth of Cure of Resin Composites/Michael C. Siao. Manila, Department of Community Dentistry, University of the Philippines Manila, c2023. x, 92 leaves color illustrations 28 cm. text rdacontent unmediated rdamedia other (Unmediated carriers) rdacarrier Seminar Paper--Doctor of Dental Medicine--University of the Philippines Manila. Introduction. The effect of obstructions and barriers on the light curing tip and curing duration has already been previously investigated. However, there is little evidence on how they directly affect the depth of cure of resin composites. This study aimed to determine the effect of resin composite contaminants on the light curing tip and curing duration on the depth of cure of light cure resin composites. Methodology. This was a true experimental study where resin composite debris was partially obstructing the light curing tip. An A2 shade of resin composite was packed into a cylindrical mold measuring 5mm in diameter and 8mm in depth. It was then cured at 20 seconds or 40 seconds using either a clean curing tip, a tip with scattered resin contaminants, or a tip with a blob resin composite contaminant depending on the treatment group it belonged to. The cured resin composite was then pushed out of the mold and the uncured portion was scraped off. Depth of cure was measured by taking the average of 3 separate readings on each sample and then diving it by 2. Results. The results showed that doubling curing time significantly increases depth of cure of resin composites. The presence of resin composite contaminants significantly decreases the depth of cure. Differences in the shapes and configurations of the contaminants did not have a significant difference in the depth of cure. There was still an increase in the depth of cure when doubling the curing time despite the presence of resin composite contaminants. Conclusion. Findings show that resin contaminants on the light curing tip significantly decrease the depth of cure of resin composites. Doubling the curing time significantly x increases the depth of cure even in resin composite contaminated light tips. It is best practice to ensure that light curing tips are clean and free from contaminants and debris that obstruct the light output. Composite resins. Dental resins. Sunico-Segarra, Michelle Faculty Co-Investigator and Research Adviser. FI UPMNL DENT LG993.5 2023 D4 S53 Thesis