Evaluation of surface roughness of composite according to surface treatment
Al-Rafidain Dental Journal,
Volume 5, Issue 2, Pages 174-179
AbstractThe purpose of this study was to evaluate the effect of
various finishing and polishing procedures on the surface roughness
(Ra) of two composite resins: An organically modified
ceramic (Definite) and a micro hybrid (Tetric).
Thirty specimens of each composite resin were fabricated
using a stainless steel mold of 5 mm in diameter and 2 mm
in depth. The composite resin was covered by a Mylar strip
and pressed flat with a microscopic glass slide and light cured.
The specimens for each composite resin were divided into
three groups, each of ten. The specimens in group one received
no treatment, while the specimens in group two and three
were finished with diamond bur. After finishing with diamond
burs group three were polished with Sof–Lex discs.
The surface profile of the specimens was obtained with a
surface profile–testing machine (Profilometer). The roughness
value in micrometer (μm) was recorded as the average Ra.
Results showed higher surface roughness in groups finished
with diamond burs followed by groups finished with diamond
burs and polished with Sof–Lex discs while groups set
against Mylar strip showed the lowest roughness values. The
result revealed no significant difference in surface roughness
values between the two composite resins.
- Article View: 182
- PDF Download: 154