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Related Concept Videos

Toxic Reactions: Overview01:26

Toxic Reactions: Overview

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When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
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Bioactivation and Tissue Toxicity01:25

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Bioactivation is a metabolic process that transforms less reactive substances into highly reactive metabolites, initiating tissue toxicity. This transformation can lead to various toxic effects, including carcinogenesis and teratogenesis. Reactive metabolites are classified into two main types: electrophiles and free radicals.Electrophiles are electron-deficient species and are produced primarily by the enzyme cytochrome P-450 during the metabolism of compounds containing carbon, nitrogen, or...
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Tissue Transplantation01:24

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Tissue transplantation is a significant medical procedure involving the transfer of cells, tissues, or organs from a donor to a recipient, with the primary aim of restoring lost functions. This procedure is crucial in treating a broad spectrum of diseases, including kidney diseases, liver failure, heart disease, and certain types of cancers.
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Overview of Regeneration and Repair01:19

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Regeneration and repair processes are critical in healing damages caused by injury, disease, and aging. In regeneration, the damaged tissue is entirely replaced with new growth that restores the original architecture and function. In contrast, tissue repair usually results in a fixed tissue architecture involving scar formation. Scars generally do not reestablish tissue function and may also exhibit structural abnormalities at the injury site.
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Drug toxicity: Drug–Drug Interaction01:30

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Drug–drug interactions can precipitate toxicity through multiple mechanisms. Absorption interactions alter how drugs enter the body, exemplified when ranitidine increases the absorption of basic drugs, while cholestyramine decreases the levels of propranolol. Protein binding interactions occur when drugs share the same binding sites on plasma proteins. Drugs like aspirin and warfarin, when bound in excess, can lead to increased free drug concentrations, enhancing the potential for...
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Accessing the Cytotoxicity and Cell Response to Biomaterials
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Material Tissue Interaction--From Toxicity to Tissue Regeneration.

G Schmalz, M Widbiller, K M Galler

    Operative Dentistry
    |December 10, 2015
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    Dental material research has evolved from avoiding adverse reactions to promoting tissue regeneration and bioactivity. Understanding material-tissue interactions is crucial for dentists to ensure patient safety and effective treatment.

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    Area of Science:

    • Biomaterials Science
    • Dental Materials
    • Tissue Engineering

    Background:

    • Material-tissue interaction is a growing field in dentistry, initially focused on preventing adverse reactions.
    • Current regulations mandate premarket testing for dental materials to ensure patient safety.
    • Dentists play a key role in selecting appropriate materials and managing risks.

    Purpose of the Study:

    • To review the evolving concepts in material-tissue interaction, including inertness, bioactivity, and regeneration.
    • To highlight the importance of understanding these interactions for clinical practice.
    • To emphasize the need for continuous learning in dental materials science.

    Main Methods:

    • Review of current concepts and research in dental material-tissue interactions.
    • Analysis of different approaches: inert materials, analytical, bioactivity, and regeneration.
    • Discussion of requirements for new dental materials, including degradability.

    Main Results:

    • Dental materials research has progressed from a focus on inertness to actively promoting positive tissue responses.
    • Concepts now include enhancing bioactivity (e.g., tertiary dentin formation, antibacterial effects) and supporting tissue regeneration.
    • New materials require controlled degradability for clinical success.

    Conclusions:

    • Material-tissue interaction is a complex and multidisciplinary field.
    • Dentists must stay informed about advancements in dental materials for optimal patient care.
    • Future dental practice requires competence in advising patients on and utilizing new material technologies.