2 / 28
Dental Treatment 2018
Dentistry and Craniofacial Research
ISSN: 2576-392X
Page 46
September 10-11, 2018
Zurich, Switzerland
25
th
International Conference on
Dental Treatment
T
he purpose of the study was to evaluate the surface detail
reproduction, gypsum compatibility and dimensional stability
of two conventional and one extended pour alginates at different
storage time (0, 1, 3, 5 days respectively). Three alginate materials
Coltoprint, Jeltrate and Hydrogum % were tested for surface detail
reproduction, gypsum compatibility and dimensional stability in
accordance with American National Standards Institute American
Dental Association (ANSI/ADA) specification number 18 and 19.
The gypsum compatibility was tested using type III dental stone.
The parameters tested were analysed between the groups using
one way ANOVA & Tukeys post hoc. A repeated measure ANOVA
was used for time periods. Alginate type and storage times
significantly affected the dimensional stability of impressions and
compatibility of casts (p<0.001). In all alginate, no statistically
significant differences were found with impressions poured
after 0 hours (control) and one day of storage (p>0.05). However,
after 3 days and 5 day of storage, Hydrogum 5 was found to be
significantly different (P<0.05). Moreover, comparing materials
there was no significant difference up to 5 days (p>0.05). However,
Hydrogum5may be poured after 5 days, but Coltoprint and Jeltrate
should be poured immediately and the storage time should not be
more than 24 hours. All the three test materials exhibited linear
dimensional change within the ADA’s accepted limit of 1.0%.
Immediate pouring of alginate provides the highest accuracy in
reproducing the teeth and adjacent tissues, with less variability
in linear dimensional change. However, this study demonstrates
that pouring may be delayed for up to 5 days using extended pour
(Hydrogum 5) alginates.
Biography
Prashanthi S Madhyastha has completed her PhD from Manipal Academy of
Higher Education (MAHE), Manipal. She is the Member Secretary of Institu-
tional Ethics Committee, Manipal College of Dental Sciences, Mangalore. She
has published more than 14 papers in reputed journals.
prashanthi.madhyast@manipal.eduAn
in-vitro
evaluation of the effect of storage time on physical
properties of conventional and extended-pour alginates
Prashanthi S Madhyastha
Manipal Academy of Higher Education, India
Prashanthi S Madhyastha, J Dent Craniofac Res 2018, Volume 3
DOI: 10.21767/2576-392X-C3-009