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The applicability of the Tanaka and Johnston analysis in a contemporary Western Australian population

Sidra Abaid
Sidra Abaid
, 
Sobia Zafar
Sobia Zafar
, 
Estie Kruger
Estie Kruger
 e 
Marc Tennant
Marc Tennant
   | 06 lug 2022
Australasian Orthodontic Journal's Cover Image
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Pubblicato online: 06 lug 2022
Pagine: 153 - 161
Ricevuto: 01 feb 2022
Accettato: 01 apr 2022
DOI: https://doi.org/10.2478/aoj-2022-0018
© 2022 Sidra Abaid et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Invisalign technology displaying upper and lower arch with Mesiodistal dimensions of permanent teeth (300dpi).
Invisalign technology displaying upper and lower arch with Mesiodistal dimensions of permanent teeth (300dpi).

Regression parameters for the estimation of mesiodistal dimensions of canine and premolar in each arch for the Australian adolescent population.

Variable (Y) X Gender a P-value b P-value Adj.R 2 SEE r
Max-CPM Mandibular Incisors M 5.09 <0.001 0.725 <0.001 0.543 0.88 0.739
Man-CPM Mandibular Incisors M 6.34 <0.001 0.658 <0.001 0.471 0.92 0.688
Max-CPM Mandibular Incisors F 7.44 <0.001 0.620 <0.001 0.337 1.04 0.582
Man-CPM Mandibular Incisors F 5.59 <0.001 0.635 <0.001 0.386 0.96 0.623

Comparison of actual and predicted mesiodistal dimensions of canine and premolars using Tanaka and Johnston equation using paired t test.

      Actual value Predicted value  
Gender Group variables N Mean SD SEM Mean SD S.E.M P-value
M Max-CPM 177 22.17 1.30 0.10 22.79 0.66 0.05 <0.001*
  Max-CPM 177 21.84 1.27 0.10 22.29 0.66 0.05 <0.001*
F Max-CPM 177 21.84 1.28 0.07 22.62 0.60 0.03 <0.001*
  Max-CPM 177 21.33 1.22 0.07 22.12 0.60 0.03 <0.001*

New regression equations for the estimation of mesiodistal dimensions of canine and premolar derived for both males and females of the Australian population.

Arch (Y) Gender Equation r P-value
Max-CPM M 5.09 + 0.725 (X) 0.739 <0.001
  F 7.44 + 0.620 (X) 0.582 <0.001
Man-CPM M 6.34 + 0.658 (X) 0.688 <0.001
  F 5.59 + 0.635 (X) 0.623 <0.001

Comparison of regression parameters between the present study and other studies.

        Constants
Author & Year Population Gender Canine-premolar segment r a B SEE R 2
Tanaka and Johnston6 White American M + F Y1 0.63 10.41 0.51 0.86 0.40
      Y2 0.65 9.18 0.54 0.85 0.42
Frankel and Benz21 African American M Y1 0.72 9.15 0.58 0.923 –
      Y2 0.79 5.97 0.72 0.911 –
    F Y1 0.61 12.83 0.39 0.672 –
      Y2 0.66 10.34 0.49 0.709 –
Yuen et al.41 Hongkong Chinese M Y1 0.79 7.97 0.66 0.68 0.62
      Y2 0.77 8.82 0.58 0.61 0.60
    F Y1 0.65 8.30 0.61 0.81 0.42
      Y2 0.69 6.66 0.64 0.82 0.47
Jaroontham and Godfrey19 Thai M Y1 0.54 13.36 0.41 0.88 0.29
      Y2 0.58 11.92 0.43 0.85 0.34
    F Y1 0.62 11.16 0.49 0.78 0.39
      Y2 0.65 9.49 0.53 0.78 0.42
Al-Bitar et al.16 Jordan M Y1 0.57 11.80 0.43 0.88 0.33
      Y2 0.65 9.32 0.53 0.87 0.42
    F Y1 0.61 11.25 0.44 0.75 0.38
      Y2 0.68 9.22 0.50 0.72 0.47
Arslan et al.3 Turkey M Y1 0.79 9.98 0.50 0.72 0.62
      Y2 0.74 9.54 0.50 0.78 0.54
    F Y1 0.83 9.77 0.50 0.72 0.68
      Y2 0.69 9.14 0.50 0.81 0.47
Pardede et al.35 Indonesia M Y1 0.67 10.51 0.54 0.87 0.45
      Y2 0.71 8.03 0.60 0.88 0.50
    F Y1 0.57 11.63 0.47 0.93 0.32
      Y2 0.61 11.16 0.45 0.81 0.36
Present study Western Australian M Y1 0.74 5.09 0.72 0.88 0.54
      Y2 0.69 6.34 0.66 0.92 0.47
    F Y1 0.58 7.44 0.62 1.04 0.34
      Y2 0.62 5.59 0.63 0.96 0.39

A prediction model for the estimation of mesiodistal dimensions of canines and premolars for Australian population adolescents.

  Male Female
Mandibular Incisors Max-CPM (Y1) Man-CPM (Y2) Max-CPM (Y1) Man-CPM (Y2)
19.0 18.87 18.84 19.22 17.66
19.5 19.23 19.17 19.53 17.97
20.0 19.59 19.50 19.84 18.29
20.5 19.95 19.83 20.15 18.61
21.0 20.32 20.16 20.46 18.93
21.5 20.68 20.49 20.77 19.24
22.0 21.04 20.82 21.08 19.56
22.5 21.40 21.15 21.39 19.88
23.0 21.77 21.47 21.70 20.20
23.5 22.13 21.80 22.01 20.51
24.0 22.49 22.13 22.32 20.83
24.5 22.85 22.46 22.63 21.15
25.0 23.22 22.79 22.94 21.47
25.5 23.58 23.12 23.25 21.78
26.0 23.94 23.45 23.56 22.10
26.5 24.30 23.78 23.87 22.42
27.0 24.67 24.11 24.18 22.74
27.5 25.03 24.44 24.49 23.05
28.0 25.39 24.76 24.80 23.37
28.5 25.75 25.09 25.11 23.69
29.0 26.12 25.42 25.42 24.01

Comparison of mean study parameters of group of teeth in each gender using independent sample t test.

Dental Variables Gender N Mean SD SEM Mean Diff t P-value
Mandibular Incisors (mm) M 177 23.57 1.33 0.10 0.344 2.95 0.003*
  F 323 23.23 1.20 0.07      
Max-CPM (mm) M 177 22.17 1.30 0.10 0.334 2.76 0.006
  F 323 21.84 1.28 0.07      
Mand-CPM (mm) M 177 21.84 1.27 0.10 0.504 4.36 <0.001*
  F 323 21.33 1.22 0.07      
eISSN:
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Lingua:
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Argomenti della rivista:
Medicine, Basic Medical Science, other
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