Table 3 Descriptive statistics of the participants’ perception and ranking scores for the tested maxillary smile profiles among the study sample (total n = 435).
Image | Descriptive | Total sample | G1 (n = 110) | G2 (n = 110) | G3 (n = 104) | G4 (n = 111) |
|---|---|---|---|---|---|---|
Maxillary smiles | ||||||
No BT | M (SD) | 9.1 (1.4) | 9.2 (1.1) | 9.1 (1.4) | 8.9 (1.5) | 9.1 (1.7) |
Variance | 2.1 | 1.3 | 2.0 | 2.2 | 2.8 | |
Min–Max | 1.0–10.0 | 2.0–10.0 | 3.0–10.0 | 2.0–10.0 | 1.0–10.0 | |
95% CI | 8.9–9.2 | 9.0–9.4 | 8.8–9.3 | 8.7–9.2 | 8.8–9.4 | |
Group difference | ANOVA: F = 0.521, P = 0.668 | |||||
Single small central BT | M (SD) | 7.1 (1.7) | 7.3 (1.6) | 7.0 (1.6) | 6.6 (1.9) | 7.5 (1,7) |
Variance | 2.9 | 2.5 | 2.6 | 3.5 | 2.8 | |
Min–Max | 0.0–10.0 | 1.0–10.0 | 0.0–10.0 | 0.0–10.0 | 2.0–10.0 | |
95% CI | 6.9–7.3 | 7.0–7.6 | 6.7–7.3 | 6.3–7.0 | 7.2–7.8 | |
Group difference | ANOVA: F = 5.216, P = 0.002 | |||||
Single large central BT | M (SD) | 6.4 (1.7) | 6.5 (1.6) | 6.1 (1.7) | 6.4 (1.7) | 6.7 (1.7) |
Variance | 2.8 | 2.7 | 2.7 | 2.9 | 2.8 | |
Min–Max | 0.0–10.0 | 0.0–10.0 | 1.0–9.0 | 2.0–10.0 | 0.0–10.0 | |
95% CI | 6.3–6.6 | 6.1–6.8 | 5.8–6.5 | 6.1–6.7 | 6.4–7.0 | |
Group difference | ANOVA: F = 2.190, P = 0.089 | |||||
Multiple small BT | M (SD) | 5.9 (2.0) | 5.8 (1.8) | 5.7 (1.9) | 5.9 (2.1) | 6.1 (2.3) |
Variance | 4.1 | 3.3 | 3.6 | 4.5 | 5.2 | |
Min–Max | 0.0–10.0 | 0.0–10.0 | 0.0–10.0 | 1.0–10.0 | 0.0–10.0 | |
95% CI | 5.7–6.1 | 5.5–6.2 | 5.3–6.0 | 5.5–6.3 | 5.6–6.5 | |
Group difference | ANOVA: F = 0.769, P = 0.512 | |||||
Multiple large BT | M (SD) | 3.6 (2.2) | 3.7 (2.0) | 3.2 (2.2) | 3.3 (2.3) | 4.1 (4.6) |
Variance | 4.9 | 4.2 | 4.8 | 5.3 | 4.9 | |
Min–Max | 0.0–10.0 | 0.0–8.0 | 0.0–8.0 | 0.0–10.0 | 0.0–9.0 | |
95% CI | 3.4–3.8 | 3.3–4.1 | 2.8–3.6 | 2.9–3.8 | 3.7–4.6 | |
Group difference | ANOVA: F = 4.100, P = 0.007 | |||||
Mandibular smiles | ||||||
No BT | M (SD) | 8.8 (1.5) | 9.1 (1.0) | 9.0 (1.4) | 8.5 (1.6) | 8.7 (1.8) |
Variance | 2.3 | 1.0 | 2.0 | 2.6 | 3.4 | |
Min–Max | 0.0–10.0 | 4.0–10.0 | 0.0–10.0 | 0.0–10.0 | 1.0–10.0 | |
95% CI | 8.7–9.0 | 8.9–9.3 | 8.7–9.3 | 8.2–8.8 | 8.3–9.0 | |
Group difference | ANOVA: F = 3.685, P = 0.012 | |||||
Single small central BT | M (SD) | 7.2 (1.6) | 7.5 (1.4) | 7.3 (1.4) | 6.8 (1.7) | 7.2 (1.8) |
Variance | 2.5 | 2.0 | 2.0 | 2.8 | 3.2 | |
Min–Max | 0.0–10.0 | 2.0–10.0 | 3.0–10.0 | 0.0–10.0 | 0.0–10.0 | |
95% CI | 7.1–7.4 | 7.3–7.8 | 7.0–7.5 | 6.5–7.2 | 6.9–7.6 | |
Group difference | ANOVA: F = 3.631, P = 0.013 | |||||
Single large central BT | M (SD) | 6.0 (1.8) | 6.2 (1.7) | 5.9 (1.8) | 5.7 (1.8) | 6.3 (1.8) |
Variance | 3.3 | 3.0 | 3.2 | 3.4 | 3.4 | |
Min–Max | 0.0–10.0 | 1.0–9.0 | 1.0–10.0 | 0.0–10.0 | 0.0–10.0 | |
95% CI | 5.9–6.2 | 5.9–6.6 | 5.5–6.2 | 5.3–6.0 | 6.0–6.7 | |
Group difference | ANOVA: F = 2.889, P = 0.035 | |||||
Multiple small BT | M (SD) | 5.6 (2.0) | 5.8 (1.9) | 5.5 (1.8) | 5.5 (2.2) | 5.5 (2.0) |
Variance | 3.9 | 3.5 | 3.3 | 4.8 | 4.1 | |
Min–Max | 0.0–10.0 | 0.0–10.0 | 0.0–10.0 | 0.0–10.0 | 0.0–9.0 | |
95% CI | 5.4–5.8 | 5.5–6.2 | 5.2–5.9 | 5.1–6.0 | 5.1–5.9 | |
Group difference | ANOVA: F = 0.671, P = 0.570 | |||||
Multiple large BT | M (SD) | 3.9 (2.2) | 4.2 (1.9) | 3.7 (2.1) | 3.8 (2.3) | 4.1 (2.3) |
Variance | 4.7 | 3.6 | 4.6 | 5.2 | 5.3 | |
Min–Max | 0.0–10.0 | 0.0–8.0 | 0.0–9.0 | 0.0–10.0 | 0.0–10.0 | |
95% CI | 3.7–4.1 | 3.8–4.5 | 3.3–4.1 | 3.4–4.2 | 3.6–4.5 | |
Group difference | ANOVA: F = 1.192, P = 0.313 | |||||
