Comparison of temperature change of one-step self-etch adhesive and two-step self-etch adhesive during photo polymerization of composite restoration.
Objectives: To compare the mean temperature difference in one-step self-etch adhesive versus two-step-self etch adhesive during photo polymerization of composite. Study Design: Randomized control trial. Study Design: Was done at Department of Operative Dentistry Dr. Ishrat-ul-Ibad Khan Institute of Oral Health Sciences, Karachi. Period: From January 2017 to June 2017. Material & Methods: A total of 92 human extracted maxillary and mandibulars third molar teeth were selected in this study. All discs were divided into two groups. 46 were treated with one-step self-etch adhesive and other 46 were treated with two-step self-etch adhesive. For both the study groups, the temperature was recorded at the start of procedure of photo polymerization and at the end of procedure. From the other side of the disc temperature was measured by non-contact infrared thermometer and recorded. Results: Male to female ratio 1.6:1. The age of the study population ranged from 20 years to 65 years, with mean age of the patients was 32.41±3.01 years. Pre and post mean and the standard deviation (SD) of temperature was 31.95±2.14 and 38.40±1.97 in One-step self-etch adhesive and 31.91±2.25 and 38.45±2.26 in two-step-self-etch adhesive group respectively. Mean change was 6.45 ± 0.78 in One-step self-etch adhesive and 6.45±0.74 in two-step-self-etch adhesive group. Mean difference was not statistically significant between groups (p=0.605). While within group comparison, mean temperature was significantly high in one-step self-etch adhesive and also in two-step-self-etch adhesive. Conclusion: It is concluded that dental practitioners should be aware of the risk of thermal insults to the pulp as a result of photo polymerization of resin-containing restorative materials, especially when caries-affected deep dentin is involved for longer periods.