Open AccessHardness and modulus of elasticity of primary and permanent teeth after wear against different dental materials
Author(s) -
Rodrigo Galo,
Marta Maria Martins Giamatei Contente,
Daniel Galafassi,
Maria Cristina Borsatto
Publication year - 2015
Publication title -
the european journal of dentistry/the european journal of dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.625
H-Index - 31
eISSN - 1305-7464
pISSN - 1305-7456
DOI - 10.4103/1305-7456.172635
Subject(s) - elasticity (physics) , dentistry , materials science , elastic modulus , young's modulus , composite material , orthodontics , medicine
Objectives: The purpose of this study was to determine the Young's modulus and the hardness of deciduous and permanent teeth following wear challenges using different dental materials. Materials and Methods: Wear challenges were performed against four dental materials: A resin-based fissure sealant (Fluoroshield®), a glass ionomer based fissure sealant (Vitremer®), and two microhybrid composite resins (Filtek Z250 and P90®). Using the pin-on-plate design, a deciduous or a permanent tooth was made into a pin (4 mm × 4 mm × 2 mm) working at a 3 N vertical load, 1 Hz frequency, and 900 cycles (15 min) with Fusayama artificial saliva as a lubricant. Before and after the tribological tests, the hardness and elasticity modulus of the tooth samples were measured by creating a nanoindentation at load forces up to 50 mN and 150 mN. All of the results were statistically analyzed using ANOVA and post-hoc Duncan's tests (P < 0.05). Results: No difference in hardness was encountered between deciduous and permanent teeth (P < 0.05) or modulus of elasticity (P < 0.05) before or after the wear challenges for all of the dental materials tested. Conclusions: Wear challenges against the studied dental materials did not alter the properties of permanent or deciduous teeth after the application of a 3 N load.