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Composite masonry walls combine multiple wythes of the same or different masonry materials to create a unified structure. These walls feature wythes that are bonded together either through mortar-filled collar joints, grouted spaces, or more commonly, with rigid metal ties and reinforcements, with the use of masonry header units being rare. Metal ties are preferred because they effectively minimize water penetration, as these walls primarily absorb moisture and then release it into the...
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Detection and Removal of Tooth-Colored Composite Resin Using the Fluorescence-Aided Identification Technique
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Recent advances and developments in composite dental restorative materials.

N B Cramer1, J W Stansbury, C N Bowman

  • 1Dept of Chemical & Biological Engineering, University of Colorado, UCB 424, Boulder, CO 80309, USA.

Journal of Dental Research
|October 7, 2010
PubMed
Summary

Dental composites face challenges like shrinkage and unreacted monomers. Research focuses on improving dental restoration performance through new initiation systems, monomers, fillers, and polymerization strategies.

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Dental Materials

Background:

  • Composite dental restorations are advanced biomaterials with limitations in biocompatibility, curing, esthetics, and mechanical properties.
  • Key issues include polymerization-induced shrinkage stress, low toughness, and residual unreacted monomers.
  • These factors compromise the longevity and performance of dental restorations.

Purpose of the Study:

  • To review the fundamental characteristics of polymerization reactions in dental composites.
  • To explore recent advancements and novel strategies aimed at enhancing composite restorative performance.
  • To identify research directions for overcoming current material limitations.

Main Methods:

  • Literature review of polymerization reactions in dental composites.
  • Analysis of recent research on modified initiation systems, monomers, and fillers.
  • Evaluation of novel polymerization techniques and coupling agents.

Main Results:

  • Identified polymerization-induced shrinkage stress and residual monomers as critical performance limitations.
  • Highlighted advancements in material composition, including new monomers and filler modifications.
  • Discussed the impact of novel polymerization strategies on improving material properties.

Conclusions:

  • Ongoing research is crucial for overcoming the inherent limitations of dental composite restorations.
  • Innovations in initiation systems, monomers, fillers, and polymerization methods are key to improving performance.
  • Future work should focus on optimizing these components for enhanced biocompatibility, durability, and esthetics.