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Related Experiment Videos

Dentinal crazing and interpin distance.

S C Khera, K C Chan, B R Rittman

    The Journal of Prosthetic Dentistry
    |November 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

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    Self-threading pins can cause dentinal crazing, with damage varying by pin type and diameter. Smaller Minikin pins (0.019-inch) cause less damage, suggesting a 3mm interpin distance, while larger pins require 5mm.

    Area of Science:

    • Dental materials science
    • Biomaterials engineering
    • Restorative dentistry

    Background:

    • Self-threading pins are used in restorative dentistry to retain fillings.
    • Dentinal crazing is a potential complication associated with pin placement.
    • Understanding pin characteristics and their impact on dentin is crucial for clinical success.

    Purpose of the Study:

    • To evaluate the dentinal damage caused by three types of self-threading pins.
    • To determine the influence of pin diameter and interpin distance on dentinal crazing.
    • To establish safe pin placement guidelines, especially for endodontically treated teeth.

    Main Methods:

    • Three types of self-threading pins (Minikin, Minim, Regular) with varying diameters were tested.
    • The frequency and degree of dentinal crazing were assessed for each pin type.

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  • Minimum safe interpin distances were investigated and recommended based on pin size.

    • Main Results:

    • All tested self-threading pins induced dentinal crazing.
    • Minikin pins (0.019-inch) caused significantly less damage than Minim (0.023-inch) and Regular (0.031-inch) pins.
    • Recommended minimum interpin distances were 3mm for Minikin pins and 5mm for Minim and Regular pins.
    • Increased damage potential was observed with multiple pin placements.

    Conclusions:

    • Pin diameter is a critical factor influencing the extent of dentinal damage.
    • Smaller diameter pins, like Minikin, are associated with less risk of dentinal crazing.
    • Clinical recommendations include using smaller pins and appropriate interpin distances, particularly in compromised dentin like that found in endodontically treated teeth.