1 research outputs found
SEM STUDY OF THE INTERFACE BETWEEN THE CAVITY WALL AND COMPOSITE RESIN IN CAVITIES FILLED USING VIBRATION
Oscillation energy has been proposed in a new
method to condense resin composites. The principle of
this technique assumes that vibration lowers the viscosity
of the resin, allowing the material to flow and easily
adapt to the cavity walls, in a similar way as a flowable
composite. The aim of the study was to assess the efficiency
and quality of composite compaction, using one of
these new devices. MATERIALS AND METHOD: The
study included 20 class I cavities prepared in extracted
human molars. The teeth were randomly divided into
two groups of 10 cavities. Both groups were filled with
composite material Filtek Z250 and the adhesive system
Single Bond Plus Adhesive Adper TM Adhesive (3M
ESPE). In the control group, condensation of the composite
was done with standard instruments. In the experimental
group, condensation was done using a vibration
instrument: Compothixo (Kerr). The prepared
sections were observed on a scanning electron microscope
(SEM), VEGA II model LSH (TESCAN). RESULTS: When
using Compothixo, the average working time was 8.53
min / restoration while, when using standard instruments,
the average working time was 10.32 min, which
seems to indicate that the vibration technique was more
effective than traditional condensation. Microscopic images
have shown that neither vibrating condensation nor
manual condensation precluded the formation of a hiatus
in some areas of the interface between the restoration and
the cavity walls, especially in areas of small irregularities.
CONCLUSIONS: Condensation of composite resins
can be faster when using vibrating instruments. Adaptation
of the material to the cavity walls is comparable to
that obtained by traditional techniques