Fig. 4.

Individual random errors in the two groups. Individual random errors for patients were plotted into scatter diagrams. In each direction, 12 and 6 patients in the oral stent (−) and (+) groups are plotted. (A) In the x-direction, the individual random errors were 1.339 ± 0.530 mm and 1.038 ± 0.256 mm in the oral stent (−) and (+) groups, respectively (P = 0.319). (B) In the y-direction, the individual random errors were 1.367 ± 0.431 mm and 1.043 ± 0.414 mm in the oral stent (−) and (+) groups, respectively (P = 0.145). (C) In the z-direction, the individual random errors were 1.348 ± 0.530 mm and 1.014 ± 0.301 mm in the oral stent (−) and (+) groups, respectively (P = 0.277). (D) In the 3D-direction, the individual random errors were 1.172 ± 0.370 mm and 0.904 ± 0.181 mm in the oral stent (−) and (+) groups, respectively (P = 0.081).