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Accuracy of Different Surgical Guide Designs for Static Computer-Assisted Implant Surgery: An In Vitro Study.

Yu Tsung Wu1, Panos Papaspyridakos1, Kiho Kang1

  • 1Department of Prosthodontics, Tufts University School of Dental Medicine, Boston, Mass, USA.

The Journal of Oral Implantology
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PubMed
Summary

Shorter surgical guides (SSGs) offer better accuracy for single implant placement, while full-arch guides with crossbars excel for multiple implants. Both designs provide clinically acceptable precision in guided implant surgery.

Keywords:
accuracycomputed-manufacturedcomputer-aideddental implantsdigital workflowguided implant surgery

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Area of Science:

  • Dental Implantology
  • Surgical Guide Technology
  • Biomedical Engineering

Background:

  • Fully guided implant placement enhances precision in restorative dentistry.
  • Surgical guide design and implant location are critical factors influencing accuracy.
  • In vitro models allow for controlled evaluation of surgical variables.

Purpose of the Study:

  • To assess the impact of different surgical guide designs on implant placement accuracy.
  • To evaluate how implant location affects accuracy in fully guided procedures.
  • To compare the precision of tooth-supported full-arch, shortened, and crossbar-reinforced guides.

Main Methods:

  • An in vitro study using 45 partially edentulous models.
  • Three groups of surgical guides were tested: full-arch, three shortened (SSGs), and full-arch with a crossbar.
  • 180 implants were placed, and accuracy was measured by superimposing pre- and post-operative scan data.

Main Results:

  • Implant location and guide design significantly affected accuracy (angle, 3D offset).
  • Shortened surgical guides (SSGs) showed higher deviation for specific implant positions compared to crossbar guides.
  • Full-arch guides with crossbars demonstrated superior outcomes for multiple implant placements.

Conclusions:

  • All tested surgical guide designs achieved clinically acceptable accuracy.
  • Shortened surgical guides (SSGs) are more accurate for single implant placement.
  • Full-arch guides with crossbars offer superior precision when placing two or more implants simultaneously.