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Development of customized positioning guides using computer-aided design and manufacturing technology for orthognathic surgery

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International Journal of Computer Assisted Radiology and Surgery Aims and scope Submit manuscript

Abstract

Purpose

The purpose of this study was to devise a method for producing customized positioning guides for translating virtual plans to actual orthognathic surgery, and evaluation of the feasibility and validity of the devised method.

Methods

Patients requiring two-jaw orthognathic surgery were enrolled and consented before operation. Two types of positioning guides were designed and fabricated using computer-aided design and manufacturing technology: One of the guides was used for the LeFort I osteotomy, and the other guide was used for positioning the maxillomandibular complex. The guides were fixed to the medial side of maxilla. For validation, the simulation images and postoperative cone beam computed tomography images were superimposed using surface registration to quantify the difference between the images. The data were presented in root-mean-square difference (RMSD) values.

Results

Both sets of guides were experienced to provide ideal fit and maximal contact to the maxillary surface to facilitate their accurate management in clinical applications. The validation results indicated that RMSD values between the images ranged from 0.18 to 0.33 mm in the maxilla and from 0.99 to 1.56 mm in the mandible. The patients were followed up for 6 months or more, and all of them were satisfied with the results.

Conclusion

The proposed customized positioning guides are practical and reliable for translation of virtual plans to actual surgery. Furthermore, these guides improved the efficiency and outcome of surgery. This approach is uncomplicated in design, cost-effective in fabrication, and particularly convenient to use.

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Acknowledgments

This research was supported by Chang Gung Memorial Hospital under Grant CMRPG381601-3, PI: Lun-Jou Lo and by the National Science Council (Taiwan) under Grant NSC103-2221-E-182A-002, PI: Hsiu-Hsia Lin. The authors are grateful to Sam Hsu, DDS, Ellen Ko, DDS, and Betty Pai, DDS, for orthodontic management and initial surgical planning for these patients.

Conflict of interest

The authors declare no conflict of interest.

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Authors and Affiliations

  1. Craniofacial Research Center, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan

    Hsiu-Hsia Lin & Hsin-Wen Chang

  2. Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Chang Gung University, 5, Fu-Shin Street, Kwei Shan, Taoyuan, 333, Taiwan

    Lun-Jou Lo

Authors
  1. Hsiu-Hsia Lin
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  2. Hsin-Wen Chang
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  3. Lun-Jou Lo
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Correspondence to Lun-Jou Lo.

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Lin, HH., Chang, HW. & Lo, LJ. Development of customized positioning guides using computer-aided design and manufacturing technology for orthognathic surgery. Int J CARS 10, 2021–2033 (2015). https://doi.org/10.1007/s11548-015-1223-0

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  • DOI: https://doi.org/10.1007/s11548-015-1223-0

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