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Related Concept Videos

Bone Structure01:55

Bone Structure

Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
Ultrasonography01:17

Ultrasonography

Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called a...

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Related Experiment Video

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An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
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Scan Body Discrepancies in Bone- and Tissue-Level Implants: In Vitro Study.

Ameer Biadsee, Reema Yusef, Guy Melamed

    The International Journal of Oral & Maxillofacial Implants
    |October 28, 2025
    PubMed
    Summary

    Torque significantly impacts polyetheretherketone (PEEK) scan body accuracy in tissue-level implants, with optimal results at 10 Ncm or less. Bone-level tapered implants showed minimal discrepancies, though some mesial tilting occurred.

    Keywords:
    digital impressionimplant scan bodylinear displacementpolyetheretherketonetightening torque

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    Area of Science:

    • Dental implantology
    • Biomaterials science
    • Prosthodontics

    Background:

    • Accurate digital impressions are crucial for dental implant restorations.
    • Polyetheretherketone (PEEK) scan bodies offer potential advantages but their precision needs evaluation.
    • Understanding torque effects on scan body accuracy is vital for reliable digital workflows.

    Purpose of the Study:

    • To assess horizontal and vertical discrepancies of PEEK scan bodies on bone-level tapered (BLT) and tissue-level (TL) implants.
    • To investigate the influence of varying torque levels (5, 10, 15 Ncm) on scan body accuracy.
    • To compare the performance of PEEK scan bodies between BLT and TL implant systems.

    Main Methods:

    • Seventy-eight PEEK scan bodies were placed on BLT and TL implants.
    • Subgroups were subjected to 5, 10, and 15 Ncm torque.
    • Scanning electron microscopy (SEM) was used for analysis of scan body length and angles.

    Main Results:

    • TL implants showed significant vertical discrepancies and reduced scan body length with higher torque.
    • Horizontal deviation was observed in one angle for TL implants, particularly at lower torque.
    • BLT implants exhibited no significant vertical or horizontal differences, except for mesial tilting at 10 Ncm.

    Conclusions:

    • Tissue-level implants demonstrated significant deviations influenced by torque, with optimal accuracy at ≤ 10 Ncm.
    • Both TL and BLT groups experienced some degree of horizontal shift and tilting.
    • Torque control is critical for maintaining PEEK scan body accuracy, especially in tissue-level implant systems.