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Retarders

Retarders

Retarders are chemical admixtures designed to extend the setting time, which is especially useful when there is a delay in sequential concrete pours to prevent cold joints and to achieve a cohesive structure. Retarders, when used in appropriate amounts, can also enhance the architectural appearance of exposed aggregate finishes.
The function of retarders is to delay the setting of concrete, and this effect can be measured using a penetration test. The retardation process involves adding...

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Related Experiment Video

Updated: Aug 12, 2025

Application of Light-cured Dental Adhesive Resin for Mounting Electrodes or Microdialysis Probes in Chronic Experiments

Application of Light-cured Dental Adhesive Resin for Mounting Electrodes or Microdialysis Probes in Chronic Experiments

Published on: July 30, 2007

Progress in Dental Adhesive Materials.

M Cadenaro^1,2, U Josic³, T Maravić³

¹Department of Medical Sciences, University of Trieste, Trieste, Italy.

Journal of Dental Research

|January 25, 2023

Summary

This summary is machine-generated.

Recent advances in adhesive dentistry focus on improving resin-based materials with new monomers and bioactive molecules for stronger, longer-lasting dental bonds. Innovations aim for simpler, more reliable clinical application without compromising material integrity.

Keywords:

adhesives bioactive materials bonding etching methacrylates resins

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Last Updated: Aug 12, 2025

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Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing

Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing

Published on: July 3, 2020

Area of Science:

Dental Materials Science
Biomaterials Engineering
Restorative Dentistry

Background:

Adhesive dentistry has seen significant progress in enhancing mechanical and bonding properties of resin-based materials.
Novel materials aim for versatility, improved chemical interaction with tooth structure, and simplified clinical application.
Ensuring reliable, long-lasting bonds with diverse substrates remains a key challenge.

Purpose of the Study:

To critically review novel monomers, bioactive molecules, and alternative techniques in adhesive dentistry.
To discuss advancements improving material resistance to degradation and micromechanical retention.
To explore innovations addressing limitations of traditional dentin etching methods.

Main Methods:

Review of recent literature on adhesive dentistry innovations.
Analysis of novel chemical constituents and their impact on material properties.
Evaluation of alternative etching techniques and their efficacy.

Main Results:

Incorporation of hydrolytically stable monomers and functional monomers enhances micromechanical retention and chemical bonding.
Bioactive molecules improve mechanical properties and prevent substrate degradation, promoting bond longevity.
Alternative etching materials and techniques offer solutions to drawbacks associated with phosphoric acid etching.

Conclusions:

Adhesive dentistry is experiencing dynamic advancements toward simpler, reliable bonding solutions.
Novel monomers and bioactive molecules are crucial for improving resin-dentin bond durability.
Future developments must balance clinical simplicity and material performance.