Comparison of Marginal and Internal Adaptation of All Ceramic Crowns Fabricated Using Three Different Intra-Oral Digital Scanners. In Vitro Study.
Alenezi, Hamed.
2018
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Abstract Purpose: The purpose of this study was to investigate the
marginal and internal adaptation of all ceramic crowns fabricated/milled using
impressions from new CareStream 3600 Intra-Oral Scanner and compare it to two
other Intra-Oral Scanners IOS (True Definition and Trios). Materials and Methods:
A typodont tooth was prepped for an all ceramic zirconia crown. Three different
IOS systems ... read more(Carestream 3600, True Definition, Trios) were used to scan the
preparation and crowns were designed with ExoCad laboratory software. The crowns
were milled using a 5-axis Tizian milling unit (n=10). Internal and marginal
adaptation were evaluated under stereo microscope and using replica technique.
Results: Marginal adaptation (μm) statistics were as follows (mean, SD):
Carestream (11.5, 3.8), Trios (2.8, 2.2), True Definition (12.5, 3.3). One-way
ANOVA revealed significant differences (p<0.001) in mean marginal adaptation
among the groups. Tukey's HSD test was significant for Carestream vs. Trios
(p<0.001) and Trios vs. True Definition (p<0.001), and non-significant for
Carestream vs. True Definition (p=0.762). Occlusal surface adaptation (μm) were as
follows (mean, SD): Carestream (114.4, 26.4), Trios (63.2, 15.9), True Definition
(114.2, 20.5). The Kruskal-Wallis test revealed significant differences
(p<0.001) in mean occlusal adaptation among the groups. Post-hoc comparisons
using the Mann-Whitney U test and Bonferroni correction were significant for
Carestream vs. Trios (p=0.001) and Trios vs. True Definition (p<0.001) and
non-significant for Carestream vs. True Definition (p=0.820). Axial surface
adaptation (μm) statistics were as follows (mean, SD): Carestream (41.3, 7.9),
Trios (55.8, 5.8), True Definition (30.8, 4.7). One-way ANOVA (p<0.001) and
post-hoc comparisons using Tukey's HSD test were significant for Carestream vs.
Trios (p<0.001), Trios vs. True Definition (p<0.001), and Carestream vs.
True Definition (p=0.002). Conclusions: Trios had significantly better marginal
and occlusal adaptation than Carestream and True Definition IOS. True Definition
had significantly better axial adaptation than Trios and Carestream
IOS.
Thesis (M.S.)--Tufts University, 2018.
Submitted to the Dept. of Posthodontics.
Advisor: Ala Ali.
Committee: Kiho Kang, Khaled El Rafie, David Bardwell, and Mathew Finkelman.
Keyword: Dentistry.read less - ID:
- js956t62r
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