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Bonding in Metals02:32

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Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
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The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
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Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
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Related Experiment Video

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Detection and Removal of Tooth-Colored Composite Resin Using the Fluorescence-Aided Identification Technique
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Amalgam Restorations: To Bond or Not.

Thomas D Larson

    Northwest Dentistry
    |November 25, 2015
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    Summary

    This review examines dental liners and bonding agents to prevent microleakage in amalgam restorations. It assesses how these materials improve restoration integrity and patient outcomes.

    Area of Science:

    • Dental Materials Science
    • Restorative Dentistry

    Background:

    • Microleakage is a significant concern in amalgam restorations, potentially leading to secondary caries and restoration failure.
    • Various dental liners have been developed to mitigate microleakage at the tooth-restoration interface.

    Purpose of the Study:

    • To review the efficacy of different dental liners in eliminating microleakage in amalgam restorations.
    • To evaluate the benefits of using a bonding process with amalgam restorations and its impact on patient outcomes.

    Main Methods:

    • Comprehensive literature review of studies on dental liners and bonding agents for amalgam restorations.
    • Analysis of research investigating the mechanisms by which liners and bonding agents reduce microleakage.
    • Evaluation of clinical data correlating the use of these materials with improved patient outcomes.

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    Main Results:

    • Certain dental liners demonstrate effectiveness in reducing or eliminating microleakage.
    • Bonding agents can enhance amalgam restorations by improving marginal seal and reducing leakage.
    • Improved marginal integrity through bonding correlates with better long-term clinical performance and patient satisfaction.

    Conclusions:

    • Dental liners and bonding agents are valuable adjuncts for improving the longevity and success of amalgam restorations.
    • The use of bonding processes in conjunction with amalgam restorations offers significant clinical advantages, particularly in preventing microleakage and enhancing patient outcomes.