Accuracy of modified CAD/CAM generated wafer for orthognathic surgery

Jin Hoo Park; Yong-Bin Lee; Sang Yoon Kim; Hyung Jun Kim; Young-Soo Jung; Hwi-Dong Jung

doi:10.1371/journal.pone.0216945

Accuracy of modified CAD/CAM generated wafer for orthognathic surgery

PLoS One. 2019 May 16;14(5):e0216945. doi: 10.1371/journal.pone.0216945. eCollection 2019.

Authors

Jin Hoo Park¹, Yong-Bin Lee², Sang Yoon Kim³, Hyung Jun Kim¹, Young-Soo Jung¹, Hwi-Dong Jung¹

Affiliations

¹ Department of Oral & Maxillofacial Surgery, Oral Science Research Institute, Yonsei University College of Dentistry, Seoul, Korea.
² Department of Oral & Maxillofacial Surgery, Hankook General Hospital, Cheongju, Korea.
³ Attending, INOVA Fairfax Hospital, Falls Church, VA, USA, Former Chief Resident at Harvard/MGH Oral and Maxillofacial Surgery, Boston, MA, United States of America.

Abstract

The aim of this study was to investigate an accuracy of modified CAD/CAM generated wafers for orthognathic surgery. A total of 20 patients who had undergone bimaxillary orthognathic surgery were included and divided into two groups: A conventional CAD/CAM generated intermediate wafer and a modified CAD/CAM generated intermediate wafer. A series of CT images were taken to compare the virtual simulations with the actual postoperative outcomes(1 month after surgery). In conventional group, the mean difference of maxillary position between virtual simulation models and postoperative results was 0.78mm and overall average error within 1mm was observed in 66.4% of the repositioned maxilla. In modified group, the mean difference was 0.77mm and overall average error within 1mm was observed in 68.3%. There were no significant statistic differences between two groups in maxillary position. This study suggests that the CAD/CAM generated wafer provides excellent accuracy. The modified CAD/CAM wafer was only comparable to conventional design in accuracy and it cannot guarantee the superior precision. However, the modified design could be beneficial in cases with unstable condylar position or for inexperienced surgeons.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adolescent
Adult
Cephalometry
Computer Simulation
Computer-Aided Design*
Female
Humans
Image Processing, Computer-Assisted / methods
Imaging, Three-Dimensional / methods
Male
Maxilla / surgery*
Orthognathic Surgical Procedures / methods*
Patient Care Planning
Postoperative Period
Printing, Three-Dimensional
Reproducibility of Results
Surgery, Computer-Assisted / methods
Tomography, X-Ray Computed / methods
Young Adult

Grants and funding

This research was financially supported by the Ministry of Trade, Industry, and Energy (MOTIE), Korea, under the “Regional industry based organization support program” (reference number R0004072) supervised by the Korea Institute for Advancement of Technology (KIAT).