Skip to main content

Table 1 Tooth size reduction in tooth agenesis Japanese patients

From: Frequency of missing teeth and reduction of mesiodistal tooth width in Japanese patients with tooth agenesis

  Control (C) Hypodintia (H) Oligodontia (O) C vs H C vs O H vs O
Mean ± S.D. Mean ± S.D. Mean ± S.D. Difference Significance Difference Significance Difference Significance
Male
 Maxilla
  Central incisor 8.81 ± 0.51 8.60 ± 0.62 8.22 ± 0.76 − 0.21 NS − 0.59 ** − 0.38 *
  Lateral incisor 7.40 ± 0.56 7.37 ± 1.00 6.43 ± 0.90 − 0.03 NS − 0.97 ** − 0.94 **
  Canine 8.38 ± 0.41 8.20 ± 0.56 7.94 ± 0.55 − 0.18 NS − 0.44 ** − 0.26 *
  First premolar 7.75 ± 0.44 7.77 ± 0.62 6.93 ± 0.40 0.02 NS − 0.82 ** − 0.84 **
  Second premolar 7.22 ± 0.50 7.13 ± 0.54 6.78 ± 0.46 − 0.09 NS − 0.44 NS − 0.35 NS
  First molar 10.90 ± 0.69 10.99 ± 0.75 10.29 ± 0.75 0.09 NS − 0.61 ** − 0.7 **
 Mandible
  Central incisor 5.60 ± 0.37 5.79 ± 0.61 5.42 ± 0.39 0.19 NS − 0.18 * − 0.37 **
  Lateral incisor 6.21 ± 0.43 6.21 ± 0.60 5.91 ± 0.50 0 NS − 0.3 * − 0.3 *
  Canine 7.29 ± 0.39 7.16 ± 0.47 6.98 ± 0.46 − 0.13 NS − 0.31 * − 0.18 NS
  First premolar 7.70 ± 0.37 7.69 ± 0.55 7.20 ± 0.47 −0.01 NS − 0.5 ** − 0.49 **
  Second premolar 7.64 ± 0.46 7.54 ± 0.46 7.13 ± 0.25 − 0.1 NS − 0.51 NS − 0.41 NS
  First molar 11.76 ± 0.59 11.74 ± 0.71 11.32 ± 0.64 − 0.02 NS − 0.44 ** −0.42 *
Female
 Maxilla
  Central incisor 8.69 ± 0.49 8.58 ± 0.49 8.05 ± 0.82 − 0.11 NS − 0.64 ** − 0.53 **
  Lateral incisor 7.29 ± 0.69 6.94 ± 0.89 6.06 ± 1.10 − 0.35 * −1.23 ** − 0.88 **
  Canine 7.98 ± 0.46 7.97 ± 0.49 7.76 ± 0.65 − 0.01 NS − 0.22 NS − 0.21 NS
  First premolar 7.67 ± 0.43 7.51 ± 0.55 7.29 ± 0.58 − 0.16 NS −0.38 * −0.22 NS
  Second premolar 7.08 ± 0.47 7.05 ± 0.57 7.20 ± 0.88 − 0.03 NS 0.12 NS 0.15 NS
  First molar 10.62 ± 0.38 10.51 ± 0.60 10.35 ± 0.51 − 0.11 NS − 0.27 * − 0.16 NS
 Mandible
  Central incisor 5.61 ± 0.37 5.66 ± 0.45 5.36 ± 0.57 0.05 NS − 0.25 NS − 0.3 *
  Lateral incisor 6.19 ± 0.37 6.07 ± 0.50 5.65 ± 0.41 − 0.12 NS − 0.54 ** − 0.42 **
  Canine 6.86 ± 0.44 6.84 ± 0.49 6.60 ± 0.64 − 0.02 NS − 0.26 NS − 0.24 NS
  First premolar 7.51 ± 0.43 7.46 ± 0.50 6.95 ± 0.56 − 0.05 NS − 0.56 ** − 0.51 *
  Second premolar 7.42 ± 0.44 7.34 ± 0.49 6.67 ± 1.17 − 0.08 NS − 0.75 NS − 0.67 NS
  First molar 11.38 ± 0.48 11.01 ± 0.61 11.05 ± 0.89 − 0.37 ** − 0.33 NS 0.04 NS
  1. NS not significant; *p < 0.05, **p < 0.01
\