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[Registration technology for mandibular angle osteotomy based on augmented reality].

Ming Zhu1, Gang Chai, Yan Zhang

  • 1Department of Plastic and Reconstructive Surgery, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine. Shanghai 200011, China. outlook_zm@yahoo.com.cn

Shanghai Kou Qiang Yi Xue = Shanghai Journal of Stomatology
|March 25, 2011
PubMed
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This study presents an effective method for registering surgical plans with 3D-printed mandible models using dental casts. This technique enhances accuracy for augmented reality applications in oral surgery.

Area of Science:

  • Oral and Maxillofacial Surgery
  • Medical Imaging
  • Rapid Prototyping

Background:

  • Accurate registration of surgical plans to patient-specific anatomical models is crucial for complex procedures.
  • Rapid prototyping (RP) enables the creation of physical models for pre-surgical planning.
  • Bridging the gap between virtual surgical plans and physical models remains a challenge.

Purpose of the Study:

  • To develop an effective method for registering operative plans to real-world mandible models fabricated using rapid prototyping (RP).
  • To enhance the precision of surgical navigation and augmented reality applications in mandibular reconstruction.

Main Methods:

  • Computed tomography (CT) scans of 20 patients were used to generate 3D images.
  • Computer-aided operative planning data were merged with CT-derived 3D images.

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  • Dental casts were digitized using a laser scanner and processed with Rapidform software to create 3D data.
  • The 3D dental cast data were matched with the 3D mandible image to generate a virtual model.
  • A video monitoring system was employed to achieve the final registration between the virtual plan and the RP model.

    • Main Results:

    • The developed method successfully overlaid virtual surgical plans, including cutting planes, onto the physical RP model of the mandible.
    • This registration process demonstrated the feasibility of integrating digital planning with physical models.

    Conclusions:

    • An effective registration pathway using dental casts was established for aligning operative plans with RP mandible models.
    • This technique offers a powerful option for augmented reality-based surgical registration.
    • Further research may explore its application in various surgical fields requiring precise model-plan alignment.