ObjectiveThe aim of this study was to test a new portable vibrator for plaster pouring
(developed for this purpose), comparing the effect of its use on the accuracy of
working cast of implant-supported restorations to the conventional vibrator. Material and methodsFrom a master cast with 2 implants, 30 transfer moldings were made randomly and
divided into three groups: Group I (GI): pouring performed in an outsourced dental
laboratory with conventional plaster vibrator (10 casts), Group II (GII): pouring
performed in the laboratory of the Federal University of Santa Catarina (UFSC)
with conventional plaster vibrator (10 casts) and Group III (GIII): pouring
performed with the portable vibrator fabricated for this study (10 casts). The
position of the analogue and marginal adaptation of the infrastructure were
verified by testing the single screw on the master model and on the working model.
The measurement of misfit was blindly performed with a precision microscope and
analyzing unit, Quadra-Check 200. The data were statistically analyzed by analysis
of variance (ANOVA) and the Holm-Sidak test (α=0.05).ResultsMeans±standard deviations were as follows: GI: 19.19±4.73 µm; GII: 21.72±5.41 µm;
GIII: 13.5±2.39 µm (P<0.05), with GIII significantly lower as compared to the
other groups. ConclusionWithin the limitations of this study, it was concluded that a greater accuracy of
working cast was achieved when a portable vibrator was used for casting molds.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.