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

Colorimetric changes in composites resulting from visible-light-initiated polymerization.

R R Seghi1, M D Gritz, J Kim

  • 1UCLA School of Dentistry, Los Angeles, CA 90024.

Dental Materials : Official Publication of the Academy of Dental Materials
|April 1, 1990
PubMed
Summary

Light-cured composites undergo significant color changes after polymerization, generally shifting towards blue and decreasing yellow chroma. Dentists should select more yellow or chromatic shades to compensate for this effect during restoration.

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

Distinct roles of lymphotoxin alpha and the type I tumor necrosis factor (TNF) receptor in the establishment of follicular dendritic cells from non-bone marrow-derived cells.

The Journal of experimental medicine·1998
Same author

Ca2+-channel-dependent and -independent inhibition of exocytosis by extracellular ATP in voltage-clamped rat adrenal chromaffin cells.

Pflugers Archiv : European journal of physiology·1998
Same author

Protein disulfide isomerase as a regulator of chloroplast translational activation.

Science (New York, N.Y.)·1998
Same author

Amplification and sequencing of end fragments from bacterial artificial chromosome clones by single-primer polymerase chain reaction.

Analytical biochemistry·1997
Same author

Phenobarbital alters protein binding to the CYP2B1/2 phenobarbital-responsive unit in native chromatin.

The Journal of biological chemistry·1997
Same author

Brucella abortus arginase and ornithine cyclodeaminase genes are similar to Ti plasmid arginase and ornithine cyclodeaminase.

Biochimica et biophysica acta·1997

Area of Science:

  • Dental Materials Science
  • Color Science in Dentistry

Background:

  • Photo-polymerization is a critical step in dental composite restoration.
  • Understanding color changes in light-cured composites is essential for achieving accurate shade matching.

Purpose of the Study:

  • To evaluate the colorimetric changes in light-cured composites after photo-polymerization.
  • To determine the impact of polymerization on composite shade and chroma.

Main Methods:

  • Three shades of nine light-cured composites were tested.
  • A photo-electric tristimulus colorimeter measured color on two backgrounds before and after polymerization.
  • Colorimetric changes were analyzed for each composite shade.

Main Results:

Related Experiment Videos

  • All tested photo-initiated composites exhibited visually significant color changes post-polymerization.
  • A consistent chromatic shift towards the blue region of color space was observed.
  • A perceived decrease in yellow chroma was noted across the tested composites.

    • Conclusions:

    • Photo-polymerization of light-cured composites causes a predictable color shift.
    • Direct shade selection should account for this immediate post-polymerization color change.
    • Selecting a composite shade that is more yellow or chromatic than the target tooth is recommended to compensate for the blue shift.