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Related Concept Videos

Polymer Classification: Stereospecificity01:26

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Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
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High-Performance Dental Resins Containing a Starburst Monomer.

S Q Dai1, W Zhou1, L Y Duan1

  • 1State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, China.

Journal of Dental Research
|March 29, 2024
PubMed
Summary
This summary is machine-generated.

A novel resin monomer, 9-armed starburst polyurethane acrylate (NPUA), offers improved properties for dental materials. NPUA demonstrates lower viscosity, reduced shrinkage, and enhanced mechanical strength compared to traditional monomers like Bis-GMA.

Keywords:
biocompatibilitycomposite materialsmechanical propertiesmethacrylatesresin(s)restorative materials

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Area of Science:

  • Dental Materials Science
  • Polymer Chemistry
  • Biomaterials Engineering

Background:

  • Dimethacrylate-based monomers are widely used in dental resins.
  • Existing monomers face challenges including poor mechanical properties, volumetric shrinkage, and estrogenicity.

Purpose of the Study:

  • To synthesize and evaluate a novel resin monomer, 9-armed starburst polyurethane acrylate (NPUA).
  • To compare the physicochemical and mechanical properties of NPUA-based dental resins with commercial Bis-GMA based resins.

Main Methods:

  • Synthesis of NPUA via the grafting-onto approach.
  • Characterization of NPUA monomer properties (viscosity, volumetric shrinkage, cytotoxicity).
  • Evaluation of NPUA-based resins and composites for flexural strength, modulus, hardness, hydrophobicity, water absorption, and solubility compared to Bis-GMA/TEGDMA systems.

Main Results:

  • NPUA exhibited significantly lower viscosity (158 ± 1 Pa·s) and volumetric shrinkage (2.5% ± 0.1%) than Bis-GMA (1,174 ± 3 Pa·s, 4.7% ± 0.1%).
  • NPUA demonstrated reduced cytotoxicity (P < 0.05).
  • NPUA-based resins and composites showed superior flexural strength, modulus, and hardness, with lower volumetric shrinkage, water absorption, and solubility compared to Bis-GMA based materials.

Conclusions:

  • NPUA is a promising novel resin monomer for dental applications.
  • NPUA-based materials offer enhanced physicochemical and mechanical properties, addressing limitations of current dental resins.
  • This research provides a new pathway for developing advanced dental restorative materials.