Three-Dimensional Measurement and Registration Accuracy of a Third Generation Optical Tracking System for Navigational Maxillary Orthognathic Surgery

Publication date: Available online 16 January 2019

Source: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology

Author(s): Ji Wook Choi, Jaeseong Jang, Kiwan Jeon, Seongho Kang, Sang-Hoon Kang, Jin Keun Seo, Sang-Hwy Lee

ABSTRACT

Objective

The purpose of this study was to evaluate the accuracy of an optical tracking system during reference point localization, measurement, and registration of skull models for navigational maxillary orthognathic surgery.

Study Design

Accuracy was first evaluated based on the position recording discrepancy at a static point and at two points of fixed lengths. Ten reference points were measured on a skull model at seven different locations and their measurements were compared with predicted positions using four registration methods. Finally, positional tracking of reference points for simulated maxillary surgery was performed and compared with laser scan data.

Results

The average linear measurement discrepancy was 0.28 mm and the mean measurement discrepancy with the five registered cranial points was 1.53 mm. The average measurement discrepancy after maxillary surgery was 1.91 mm (for impaction) and 1.56 mm (for advancement). The registration discrepancy in jitter and point registration on the y-axis was significantly greater than on the other axes.

Conclusions

The optical tracking system seems clinically acceptable for precise tracking of the maxillary position during navigational orthognathic surgery notwithstanding the chance of greater measurement error on the y-axis.

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