Visible Portion of Anterior Teeth at Rest and Analysis of Different Smile Characteristics in the Saudi Population of the Jeddah Region

Table 3

Mean ± standard deviation (mm) of clinical crown length (CCL) and vertical tooth display at rest (TDR) distributed on the five age groups and difference between them using ANOVA.

	Tooth		Age groups (years)
			19–<25	25–<35	35–<45	45–<60	Above 60	value
Maxillary anterior teeth	Central incisor	CCL	10.57 ± 0.38	10.46 ± 0.54	10.4 ± 0.55	10.39 ± 0.49	10.24 ± 0.7	0.36
		TDR	2.93 ± 0.44	2.57 ± 0.49	2.32 ± 0.53	1.47 ± 0.54	0	0.001
	Lateral incisor	CCL	9.05 ± 0.52	9.0 ± 0.56	9.19 ± 0.61	8.95 ± 0.58	9.21 ± 0.65	0.46
		TDR	2.19 ± 0.75	1.73 ± 0.53	1.65 ± 0.52	1.17 ± 0.40	0	0.001
	Canine	CCL	10.31 ± 0.46	10.19 ± 0.56	10.53 ± 0.99	10.21 ± 0.52	9.86 ± 0.53	0.07
		TDR	0.43 ± 0.38	0.55 ± 0.39	0.49 ± 0.33	0.35 ± 0.43	0	0.004
Mandibular anterior teeth	Central incisor	CCL	9.13 ± 0.49	9.15 ± 0.46	9.3 ± 0.53	9.04 ± 0.35	9.29 ± 0.48	0.24
		TDR	0.89 ± 0.41	1.12 ± 0.50	1.54 ± 0.60	2.09 ± 0.65	2.14 ± 0.28	0.001
	Lateral incisor	CCL	9.34 ± 0.43	9.11 ± 0.38	9.27 ± 0.43	9.24 ± 0.36	9.43 ± 0.52	0.08
		TDR	0.89 ± 0.42	0.89 ± 0.45	1.32 ± 0.64	1.68 ± 0.55	2.13 ± 0.33	0.001
	Canine	CCL	10.83 ± 0.43	10.95 ± 0.5	10.95 ± 0.58	10.89 ± 0.47	10.29 ± 0.71	0.02
		TDR	0.41 ± 0.31	0.54 ± 0.39	0.72 ± 0.50	0.90 ± 0.40	2.04 ± 1.05	0.001

Significant .