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Updated: Jun 3, 2026

A Postoperative Evaluation Guideline for Computer-Assisted Reconstruction of the Mandible
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Published on: January 28, 2020

Precise screw positioning at the mandibular angle: computer assisted versus template coded.

Heinz-Theo Lübbers1, Astrid Kruse, Peter Messmer

  • 1Clinic for Cranio-Maxillofacial and Oral Surgery, University Hospital of Zurich, Zürich, Switzerland. t.luebbers@gmail.com

The Journal of Craniofacial Surgery
|March 16, 2011
PubMed
Summary
This summary is machine-generated.

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Template-coded computer navigation offers superior accuracy for placing intraoral distraction devices in mandibular deformities compared to freehand methods. This precision is vital for successful distraction osteogenesis and achieving optimal patient outcomes.

Area of Science:

  • Oral and Maxillofacial Surgery
  • Biomedical Engineering
  • Medical Device Technology

Background:

  • Precise positioning of buried intraoral devices is critical for successful distraction osteogenesis in mandibular deformities.
  • Template-guided techniques are common, but computer navigation presents a promising alternative for enhanced accuracy.
  • Surgical navigation offers certainty in defining device placement, potentially improving outcomes.

Purpose of the Study:

  • To compare the accuracy of template-coded versus freehand computer navigation for placing intraoral distraction devices.
  • To evaluate the effectiveness of computer-assisted surgery in the mandibular angle region.

Main Methods:

  • A simulated clinical scenario using a mandible model in a phantom head.
  • Screws were positioned using transoral and transbuccal approaches.

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Last Updated: Jun 3, 2026

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  • Both template-coded and freehand computer navigation systems were employed.

    • Main Results:

    • Template-coded navigation achieved a medium deviation of 0.63 mm.
    • Freehand computer navigation showed a significantly higher medium deviation of 0.98 mm.
    • Deviations ranged from 0.00-1.24 mm for template-coded and 0.00-3.13 mm for freehand navigation.

    Conclusions:

    • Computer-assisted surgery ensures high accuracy for intraoral distraction devices in the critical mandibular angle region.
    • Template-coded guidance demonstrates significantly superior accuracy, establishing it as the gold standard.
    • This enhanced precision is crucial for buried intraoral distraction devices in treating mandibular deformities.