Table 2 Target registration error of mandible in the device using 3DSlicer software and Polaris optical tracker according to the number of registration marker (Mean ± SD)

Condyle head (n = 30)

1.00 ± 0.42

0.92 ± 0.43

1.07 ± 0.43

0.80 ± 0.31

1.10 ± 0.53

0.065

Condyle neck (n = 30)

1.09 ± 0.47

0.99 ± 0.40

0.95 ± 0.49

0.87 ± 0.41

1.01 ± 0.33

0.361

Coronoid process (n = 30)

1.04 ± 0.47

0.95 ± 0.40

0.99 ± 0.36

1.04 ± 0.41

1.17 ± 0.43

0.353

Sigmoid notch (n = 30)

0.85 ± 0.43

0.76 ± 0.44

1.01 ± 0.47

0.96 ± 0.33

0.93 ± 0.46

0.213

Posterior border (n = 30)

1.02 ± 0.32

0.68 ± 0.26

0.98 ± 0.37

0.80 ± 0.37

0.92 ± 0.36

0.001*

Antilingula (n = 30)

1.11 ± 0.45

0.83 ± 0.45

0.97 ± 0.30

0.96 ± 0.43

0.91 ± 0.41

0.134

Mandibular anlge (n = 30)

1.00 ± 0.37

0.90 ± 0.49

0.92 ± 0.35

0.91 ± 0.39

1.05 ± 0.38

0.545