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Related Experiment Videos

Endodontic abutments and complete dentures

C F Parkinson

    The Journal of Prosthetic Dentistry
    |June 1, 1982
    PubMed
    Summary

    Most root canals end short of the radiographic apex, necessitating specific termination points for root canal fillings. For maxillary teeth and mandibular molars, aim for 0.89 mm short; for mandibular single-rooted teeth, 0.69 mm short.

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    Area of Science:

    • Endodontics
    • Dental Anatomy
    • Restorative Dentistry

    Background:

    • Root canal anatomy exhibits significant dimensional variability.
    • Accurate termination of root canal fillings is crucial for successful endodontic treatment and overdenture stability.
    • Previous research has not definitively established optimal termination points for root canal fillings across different tooth types.

    Purpose of the Study:

    • To determine the precise radiographic termination points of root canals in various maxillary and mandibular teeth.
    • To establish evidence-based guidelines for the optimal termination of root canal fillings.
    • To assess the implications of root canal termination accuracy for endodontic treatment success, particularly in the context of overdentures.

    Main Methods:

    • In vitro analysis of root canal terminations in extracted maxillary and mandibular teeth.
    • Radiographic assessment to identify the exact location where root canals terminate relative to the radiographic apex.
    • Statistical analysis to determine mean termination points and variability.

    Main Results:

    • A high percentage of teeth exhibited root canals terminating short of the radiographic apex: 90% of maxillary single-rooted, 89% of maxillary multirooted, 82% of mandibular single-rooted, and 92.5% of mandibular molars.
    • Considerable dimensional variability in root canal termination was observed.
    • Recommended termination points for root canal fillings were established: approximately 0.89 mm short for maxillary teeth and mandibular molars, and 0.69 mm short for mandibular single-rooted teeth.

    Conclusions:

    • Root canal anatomy frequently terminates short of the radiographic apex, highlighting the need for standardized filling protocols.
    • The established mean termination points provide practical guidelines for clinicians to optimize root canal filling length, thereby enhancing treatment predictability.
    • Accurate root canal filling termination is paramount for the long-term success of endodontic therapy and the preservation of natural teeth used in overdenture constructions.

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