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. Author manuscript; available in PMC: 2009 Apr 16.
Published in final edited form as: Angle Orthod. 2008 Sep;78(5):873–879. doi: 10.2319/082907-399.1

Table 2.

Differences between Linear Measurements (mm) from Three Imaging Modalitiesa

Conventional – Orthogonal CBCT
 Perspective CBCT – Orthogonal CBCT
 Perspective CBCT – Conventional
 MANOVA
Measurementb Mean SD % Within ±2 mm Mean SD % Within ±2 mm Mean SD % Within ±2 mm P > F
LFH −0.95 1.88 58% 0.04 1.90 87% 0.99 2.84 58% .0331
UFH 0.56 2.44 71% 0.65 2.70 55% 0.09 1.94 77% .3903
TFH −0.80 2.62 48% 0.42 3.38 58% 1.23 3.22 39% .0848
MnL −1.39 2.57 45% −0.82 3.56 55% 0.57 3.51 45% .0220
MxL 2.21 4.71 35% 0.43 5.38 39% −1.78 4.09 39% .0135
AN 1.15 3.59 52% 0.78 2.55 68% −0.37 3.41 48% .1460
BN −0.26 4.16 45% −0.03 2.15 65% 0.23 4.07 55% .9417
PgN −0.12 4.29 42% 0.16 2.27 65% 0.28 4.60 39% .9120
OJT 0.25 1.47 90% 0.08 0.93 97% −0.17 1.33 84% .6595
ST(LN) 0.76 3.39 61% 0.03 1.75 71% −0.73 3.38 65% .5843
ST(UN) 1.45 3.33 68% −0.15 1.40 81% −1.61 3.30 65% .0427
ST(PgN) 0.77 4.13 52% 0.03 2.31 61% −0.74 4.14 65% .5843
a

Conventional indicates conventional cephalograms adjusted for magnification; perspective CBCT, synthesized cone-beam CT cephalograms with perspective projection adjusted for magnification; orthogonal CBCT, synthesized cone-beam CT cephalograms with orthogonal projection.

b

LFH indicates lower face height; UFH, upper face height; MnL, mandibular unit length; MxL, maxillary unit length; AN, A to N with respect to true vertical; BN, B to N with respect to true vertical; PgN, pogonion to N with respect to true vertical; OJT, overjet; ST(LN), lower lip to N with respect to true vertical (soft tissue); ST(UN), upper lip to N with respect to true vertical (soft tissue); ST(PgN), pogonion to N with respect to true vertical (soft tissue).