Journal of Research and Advancement in Dentistry
Official publication of Magadh University and Kolhan University, Government of Bihar and Jharkhand, India
Official publication of Magadh University and Kolhan University, Government of Bihar and Jharkhand, India
Year : 2020
Volume : Volume 11
Issue : Issue 2s
Address for correspondence :
Dr. Hemanth Sharma.
hemantsharma7@yahoo.com
Background: Aim of this study was to evaluate the effect of addition of 2.5, 5, 7 wt% aluminum oxide on the surface hardness and roughness of heat polymerized acrylic denture base resin and compare it to commercially available high impact acrylic resin. Material and method: A total of 150 specimens were prepared which were divided into 5 groups. Group 1 consisted of conventional heat cure denture material DPI. In group-2, 2.5%alluminium oxide was added. In group 3. 5% aluminium oxide was added. In group 4. 7% aluminium oxide was added. In group 5. high impact heat polymerized denture base material (Lucitone199) was used. One Way ANOVA test with Post. Hoc. Tukey. HSD test was used. p value < 0.05 was taken as significant, Med Cale. 14.6-version software was used for all statistical analysis Result: It is evident from the study that mean surface roughness value was highest in Group 2 and lowest in Group 5. One Way ANOVA test found that mean surface roughness of all groups were not alike. (p> 0.001 ). On application of Post Hoc Tukey HSD test, It was found that the Mean surface roughness of group- 5 was significantly lower in comparison to all other groups except group-1. Further, Mean surface roughness of group 2, 3 and 4 were alike. The Mean surface roughness of groups 4 did not differ significantly from group – 1 (p<0.001). Conclusion: The results of SH evaluation revealed that High impact denture base resin (group-5) showed the least surface roughness (0.0629m) and denture base resin added with 2.5% Al2O3 (Group-2) showed the maximum surface roughness (0.198m). One Way ANOVA test reviled that Surface Roughness values were not alike.Multiple comparison using Tukey HSD revealed that addition of Al2O3 in concentration of 2.5, 5, 7% wt Al2O3 significantly increased the SH.
Keywords: Impact strength, Heat polymerized acrylic resin, One Way ANOVA test, Aluminum oxide powder, Hardness, surface roughness.
