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A Method for Minimizing Rotational Errors of Implant Prostheses.

Hyeonjong Lee, Kung-Rock Kwon, Janghyun Paek

    The International Journal of Oral & Maxillofacial Implants
    |May 19, 2017
    PubMed
    Summary
    This summary is machine-generated.

    Minimizing rotational errors in dental implant connections is crucial. The clockwise-hemostat (CW-Hs) method significantly reduced rotational errors between implants and analogs, proving most effective.

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    Area of Science:

    • Dental Implantology
    • Prosthodontics
    • Biomaterials Engineering

    Background:

    • Rotational errors in dental implant procedures can occur during impression coping connection to the implant and to the analog.
    • These errors can compromise the accuracy of the final restoration.
    • Minimizing rotational error is essential for predictable prosthetic outcomes.

    Purpose of the Study:

    • To investigate and identify methods for minimizing rotational errors during the connection of impression copings to dental implants and analogs.
    • To evaluate the influence of different connection types and tightening methods on rotational accuracy.

    Main Methods:

    • Three implant types (tissue-level internal octagon, bone-level internal hex, bone-level external hex) were tested.
    • Rotational errors were measured between implants and analogs using impression copings connected via four methods: clockwise (CW) or counterclockwise (CCW) tightening, with hemostat (Hs) or hand (Hd) tightening.
    • Ten replicates per group (n=10) were analyzed.

    Main Results:

    • The clockwise-hemostat (CW-Hs) and counterclockwise-hand (CCW-Hd) methods showed the lowest rotational errors (0.11 ± 0.21 and 0.19 ± 0.34 degrees, respectively).
    • Conversely, clockwise-hand (CW-Hd) and counterclockwise-hemostat (CCW-Hs) methods resulted in significantly higher rotational errors (-1.80 ± 0.67 and 2.07 ± 0.75 degrees, respectively).
    • Tightening method demonstrated a strong association with rotational error, while implant connection type showed a weak association.

    Conclusions:

    • The clockwise-hemostat (CW-Hs) tightening method is the most effective for minimizing rotational error between dental implants and analogs.
    • Careful selection of the tightening method is critical for improving the accuracy of implant impressions.