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Designing CAD/CAM Surgical Guides for Maxillary Reconstruction Using an In-house Approach

Designing CAD/CAM Surgical Guides for Maxillary Reconstruction Using an In-house Approach

Published on: August 24, 2018

Tolerance within a surgical guide.

N Van Assche¹, M Quirynen

¹Department of Periodontology, Catholic University Leuven, Kapucijnenvoer 33, 3000 Leuven, Belgium. nele.vanassche@uz.kuleuven.ac.be

Clinical Oral Implants Research

|January 16, 2010

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Drilling deviations in guided surgery can occur during the drilling phase due to drill tolerance. Minimizing drill key height and maintaining a centric position can improve accuracy in implant procedures.

Area of Science:

Dental implantology
Surgical navigation

Background:

Guided surgery is a recent advancement in dental implantology.
Previous studies have confirmed the accuracy of guided surgery procedures.

Purpose of the Study:

To quantify drilling deviation during guided implant surgery.
To highlight potential inaccuracies arising solely from the drilling phase.
To inform clinicians about drill-in-guide tolerances.

Main Methods:

Drilling simulations were performed in plexiglass.
Maximal drill inclination within drill keys was utilized.
Deviations were measured at the implant shoulder and apex.

Main Results:

A mean angular deviation of 4.7 degrees was observed.

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Mean horizontal deviations were 0.8 mm at the implant shoulder and 1.8 mm at the apex for a 13 mm implant.

Deviation varied with implant length, sleeve height, and guiding system.

Conclusions:

Increasing drill key height can reduce inaccuracies.
Maintaining a parallel and centric drill position is crucial for accuracy.