Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Dynamic mechanical properties of amalgams

R P Kusy, A R Greenberg

    Journal of Biomedical Materials Research
    |January 1, 1981
    PubMed
    Summary

    A new dynamic mechanical analysis method accurately measures dental amalgam setting rates. This technique reveals how elastic modulus increases over time, offering insights into material performance and preparation techniques.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    Physical and mechanical characteristics of a chlorine-substituted poly(para-xylylene) coating on orthodontic chain modules.

    Journal of materials science. Materials in medicine·2004
    Same author

    Variation in flexural properties of photo-pultruded composite archwires: analyses of round and rectangular profiles.

    Journal of materials science. Materials in medicine·2004
    Same author

    Frictional characteristics of composite orthodontic archwires against stainless steel and ceramic brackets in the passive and active configurations.

    Journal of materials science. Materials in medicine·2004
    Same author

    Behaviour of photopolymerized silicate glass fibre-reinforced dimethacrylate composites subjected to hydrothermal ageing: part II. Hydrolytic stability of mechanical properties.

    Journal of materials science. Materials in medicine·2004
    Same author

    Behaviour of photopolymerized silicate-glass-fibre-reinforced dimethacrylate composites subjected to hydrothermal ageing: part I. Steady-state sorption characteristics.

    Journal of materials science. Materials in medicine·2004
    Same author

    Analyses of rampant corrosion in stainless-steel retainers of orthodontic patients.

    Journal of biomedical materials research·2002

    Area of Science:

    • Materials Science
    • Biomaterials Engineering
    • Dental Materials Science

    Background:

    • Dental amalgams are widely used restorative materials.
    • Understanding their setting kinetics is crucial for clinical success.
    • Traditional methods for assessing setting rates can be time-consuming or indirect.

    Purpose of the Study:

    • To introduce and validate a novel dynamic mechanical analysis (DMA) technique for evaluating dental amalgam setting rates.
    • To characterize the time-dependent mechanical properties of various amalgam materials.
    • To compare DMA results with established methods and assess the influence of experimental variables.

    Main Methods:

    • Utilized a compound parallel beam apparatus for dynamic mechanical analysis.
    • Continuously measured dynamic mechanical properties of five amalgam materials at 37°C.
    • Performed compression tests on microspecimens to determine compressive strength and strain.
    • Investigated mechanical properties within approximately 7 minutes to 15 hours post-trituration.

    Main Results:

    • The modulus of elasticity (Ea) increased significantly over 15 hours, from 1.2 x 10^10 Pa to 6.5 x 10^10 Pa.
    • DMA-derived moduli approached values typically reported by ultrasonic techniques.
    • Compression test results for Ea (2-3 x 10^10 Pa) aligned with existing literature.
    • Compressive strength (sigma max) showed a notable increase with higher strain rates (epsilon).

    Conclusions:

    • The developed DMA technique provides a reliable and continuous method for assessing dental amalgam setting rates.
    • The study demonstrates the evolution of elastic modulus and compressive strength during amalgam setting.
    • Experimental technique influences observed mechanical properties, highlighting the need for standardized procedures.

    Related Experiment Videos