FFECTS OF NANOFILLER CONTENT ON THE MICROHARDNESS OF EXPERIMENTAL MICROHYBRID RESIN COMPOSITES

,; ,; ,; ,; ,; ,; ,

Journal of the Korean Academy of Pediatric Dentistry 2005;32(1):7-12.
Published online February 28, 2005.

FFECTS OF NANOFILLER CONTENT ON THE MICROHARDNESS OF EXPERIMENTAL MICROHYBRID RESIN COMPOSITES

서울대학교 치과대학 소아치과학교실 및 치학연구소

나노 충전제 함량에 따른 복합레진의 표면 미세경도 차이

정영정, 김영재, 김정욱, 이상훈, 김종철, 한세현, 장기택

서울대학교 치과대학 소아치과학교실 및 치학연구소

Correspondence: ,

Abstract

The objective of this study was to evaluate the effects of nanofiller content on the microhardness and polymerization of experimental microhybrid composites. The nanofiller contorts in the experimental composites were varied (0%, 1%, 2%, 3%), while the total filler content remained constant as 76%wt. We obtained the following results: 1. The microhardness of the top surface for the 2% 3% nanofilled microhybrid composites were significantly higher than those for the 0%, 1% nanofilled composites (p<0.05), but the difference was not great. 2. The microhardness of the bottom surfaces significantly increased with an increase in the nanofiller level (p<0.05), except between the 2% and 3% nanofilled groups (P>0.05). 3. As the nanofiller level increased, the difference between microhardness of top and bottom surfaces significantly decreased (p<0.05), except between 2% and 3% nanofilled groups (p>0.05).

Key Words: Nanofiller, Microhardness, Degree of conversion