T1 PT1/T2a T2 PT2/T3a T3 PT1/T3a
Mean (SD) Range Mean (SD) Range Mean (SD) Range
Lateral headfilms N = 15 N = 15 N = 11
SNA angle, (°) 79.9 (4.6) 72.4 - 89.8 0.022* 82.8 (4.5) 74 - 90 0.054 79.5 (4.3) 73.3 - 89.7 0.707
SNB angle, (°) 73.9 (5.2) 66.4 - 85.3 0.003* 77.8 (4.3) 70.9 - 86 0.202 75.5 (3.9) 70.1 - 83.1 0.124
Occlusal plane/SN angle, (°) 24.5 (6.5) 9 - 32 0.079 20.7 (5.9) 10.3 - 30 0.342 21 (4.2) 13.7 - 26.3 0.229
Anterior facial height, mm 110.6 (6.4) 100.4 - 124.6 - - - - 109.3 (6.1) 99.9 - 117.9 0.904
Mandibular length, mm 79.7 (12.2) 62.4 - 103.6 0.004* 87.2 (10.9) 75.3 - 113 0.129 89.8 (15.3) 72.4 - 113.1 0.056
Horizontal overbite, mm 5.3 (2.3) 1.8 - 9.2 - - - - 2.7 (1.2) 1.3 - 5.4 0.004*
Vertical overbite, mm -0.7 (3.1) -8 - 2.9 - - - - 1.5 (1.8) -2 - 3.6 0.219
Frontal headfilms N = 10 - - - N = 8 -
Ramus height, ratio - 0.96 - - - - 0.96 (0.05) 0.88 - 1 0.221
Chin asymmetry, (°) - 1.3 - - - - 1.1 (0.4) 0.5 - 1.7 0.32

aPaired-samples t-test for intragroup differences.
*Statistically significant (P < 0.05).
T1 = preoperative examination; T2 = postoperative examination; T3 = long-term examination; N = number of patients; SD = standard deviation; SN = sella-nasion; SNA = sella-nasion to A point; SNB = sella-nasion to B point.