Table 2 Three-way multiple ANOVA results of the effects of gender, experience in assisting or having a dentist in immediate family or not, and of belonging to the clinical or preclinical group

T

O

O

H

S

H

A

D

E

Reference photograph

(5500 K)

7

0.929

0.485 N.S.

1

0.351

0.554 N.S.

1

0.202

0.654 N.S.

1

0.922

0.338 N.S.

Right maxillary incisor at 5100 K

7

4.797

< 0.001**

1

2.580

0.110 N.S.

1

1.724

0.191

1

0.922

0.338 N.S.

lighter

Right maxillary incisor at 4700 K

7

5.576

< 0.001**

1

5.609

0.01 *

1

4.910

0.028*

1

1.567

0.212 N.S.

Right maxillary incisor at 4300 K

7

5.493

< 0.001**

1

4.356

0.038*

1

7.339

0.007**

1

3.134

0.078 N.S.

darker

Right maxillary incisor at 5900 K

7

2.972

0.005**

1

3.047

0.082 N.S.

1

0.261

0.610 N.S.

1

3.819

0.055 N.S.

Right maxillary incisor at 6300 K

7

4.183

< 0.001**

1

3.615

0.059 N.S.

1

1.841

0.176 N.S.

1

0.461

0.498 N.S.

Right maxillary incisor at 6700 K

7

3.719

0.001**

1

6.766

0.010*

1

2.055

0.153 N.S.

1

0.371

0.543 N.S.

lighter

Both maxillary incisors at 5100 K

7

1.810

0.087 N.S.

1

4.076

0.045*

1

0.472

0.493 N.S.

1

1.115

0.292 N.S.

Both maxillary incisors at 4700 K

7

4.524

< 0.001**

1

8.219

0.005**

1

3.648

0.058 N.S.

1

0.133

0.715 N.S.

Both maxillary incisors at 4300 K

7

6.398

< 0.001**

1

12.022

0.001**

1

6.709

0.010*

1

1.405

0.237 N.S.

darker

Both maxillary incisors at 5900 K

7

1.143

0.338 N.S.

1

0.330

0.567 N.S.

1

0.042

0.838 N.S

1

2.357

0.126 N.S.

Both maxillary incisors at 6300 K

7

1.634

0.128 N.S.

1

0.040

0.841 N.S.

1

1.310

0.254 N.S.

1

0.281

0.597 N.S.

Both maxillary incisors at 6700 K

7

1.360

0.224 N.S.

1

0.277

0.599 N.S.

1

0.302

0.583 N.S.

1

0.525

0.470 N.S.

Both maxillary canines at 5900 K

7

0.623

0.737 N.S.

1

0.019

0.890 N.S.

1

0.182

0.671 N.S.

1

0.390

0.533 N.S.

darker

Both maxillary canines at 6300 K

7

0.888

0.517 N.S.

1

0.096

0.758 N.S.

1

0.196

0.658 N.S.

1

0.043

0.836 N.S.

Both maxillary canines at 6700 K

7

0.839

0.556 N.S.

1

1.780

0.184 N.S.

1

0.353

0.553 N.S.

1

0.239

0.626 N.S.

Lighter gingiva (4300 K)

7

1.991

0.058 N.S.

1

0.688

0.408 N.S.

1

1.988

0.160 N.S.

1

0.219

0.641 N.S.

L

E

N

G

T

H

Shortened both maxillary central incisors

7

1.522

0.162 N.S.

1

4.518

0.035*

1

0.944

0.332 N.S.

1

0.309

0.579 N.S.

Elongated both maxillary lateral incisors to the length of central incisors

7

3.523

0.001**

1

11.030

0.001**

1

0.439

0.508 N.S.

1

0.389

0.533 N.S.

Elongated incisal edges of both maxillary lateral incisors to the length of canines

7

1.687

0.114 N.S.

1

6.357

0.012*

1

0.128

0.721 N.S.

1

0.269

0.604 N.S.

Beveled both maxillary lateral incisors distal edge

7

4.490

< 0.001**

1

13.935

< 0.001**

1

0.011

0.918 N.S.

1

1.481

0.225 N.S.

Elongated canines

7

2.965

0.006**

1

8.926

0.003**

1

0.074

0.786 N.S.

1

0.943

0.333 N.S.

P

O

S

I

T

I

O

N

Central diastema

7

0.740

0.638 N.S.

1

1.835

0.177 N.S.

1

1.609

0.206 N.S.

1

0.488

0.485 N.S.

Multiple diastemas

7

0.61

0.740 N.S.

1

0.112

0.739 N.S.

1

0.189

0.664 N.S.

1

0.022

0.882 N.S.

Typical rotation of the right lateral maxillary incisor

+ 10⁰

7

2.389

0.023*

1

9.606

0.002**

1

2.546

0.112 N.S.

1

0.140

0.709 N.S.

+ 20⁰

7

1.738

0.102 N.S.

1

6.092

0.014*

1

1.277

0.260 N.S.

1

0.031

0.861 N.S.

+ 30⁰

7

1.357

0.226 N.S.

1

4.899

0.028*

1

1.308

0.254 N.S.

1

0.070

0.792 N.S.

Atypical rotation of the right lateral maxillary incisor

− 10⁰

7

2.548

0.016*

1

7.259

0.008**

1

3.602

0.053 N.S.

1

0.091

0.763 N.S.

− 20⁰

7

2.970

0.006**

1

10.087

0.002*

1

3.004

0.085 N.S.

1

0.065

0.798 N.S.

− 30⁰

7

4.406

< 0.001**

1

16.276

< 0.001**

1

1.887

0.171 N.S.

1

0.190

0.663 N.S.