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	P 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 <0.05.