The Difference of Composite Resin Compressive Strength with Sidikalang Coffee Soaking

Abstract

Composite resin is a caries filling material. Generally, dentists choose this type of
resin as a restoration material because this material has a high compressive
strength. There are several factors that influence the compressive strength of
composite resins, including beverages consumed such as coffee. This study aims to
determine the difference in the compressive strength of the composite resin with
Sidikalang coffee immersion in 9 hours, 27 hours and 54 hours immersion time.
This type of research is experimental laboratories with posttest only control group
design. The research sample was composite resin measuring 8 mm in diameter and
4 mm in height. The sample size is determined by the Federer formula and a total
sample of 24 was obtained for the four treatment groups. Measurement of
compressive strength using a three-point bending tool on a universal testing
machine. Data were analyzed by using the oneway Anova test. Based on the results
of the study, the average compressive strength of composite resin in the group
without immersion, 9 hours, 27 hours and 54 hours of immersion was 20.69 ± 0.84,
18.94 ± 0.41, 14.36 ± 0.66 and 6.70 ± 0.48. From the results of the study it can be
concluded that the ads are a significant difference in the average compressive
strength of composite resin after immersion in Sidikalang coffee for 9 hours, 27
hours and 54 hours.