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Related Experiment Video

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Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
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932

Optical integration of CAD/CAM materials.

Jan-Frederik Güth, Pascal Magne

    The International Journal of Esthetic Dentistry
    |July 20, 2016
    PubMed
    Summary

    Optical integration (OI) of CAD/CAM materials varied significantly under different lighting conditions. Direct neutral white light provided the best OI, while fluorescent light highlighted the most substantial differences between materials and natural teeth.

    Area of Science:

    • Dental Materials Science
    • Biomaterials
    • Restorative Dentistry

    Background:

    • Assessing the optical integration (OI) of Chairside Economical Restoration of Esthetic Ceramics (CAD/CAM) materials is crucial for achieving natural-looking restorations.
    • Standardized and clinically relevant methods are needed to evaluate how different lighting conditions affect the visibility of CAD/CAM restorations.

    Purpose of the Study:

    • To evaluate the optical integration (OI) of monolithic CAD/CAM materials under four different illumination conditions.
    • To determine if varying light sources significantly influence the perceived visibility and integration of dental restorations.

    Main Methods:

    • Eighteen CAD/CAM inlays were fabricated and placed using glycerin gel.
    • Standardized photographs were captured under neutral white light (direct and indirect), cross-polarized light, and fluorescent light.

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  • Six evaluators assessed the optical integration score (OIS) on a scale of 0 (worst) to 4 (optimal), with intact teeth serving as controls.

    • Main Results:

    • Direct neutral white light yielded high OIS, with means ranging from 2.67 to 3.83.
    • Indirect illumination resulted in lower OIS (mean 1.88), and fluorescent light showed the lowest mean OIS (1.67).
    • ENAMIC and VITA BLOCS Mark II exhibited superior optical integration under fluorescent light, whereas IPS e.max CAD and Paradigm MZ 100 showed low fluorescence.

    Conclusions:

    • A straightforward method for clinicians to evaluate CAD/CAM material optical integration in practice is presented.
    • All tested CAD/CAM materials demonstrated excellent optical integration under direct neutral white light.
    • Fluorescent light revealed the most significant differences in optical integration between the evaluated CAD/CAM materials and natural tooth structure.