Comparison of smile variables among male dental students according to age.

Table 1: Comparison of smile variables among male dental students according to age.

Smile variables	Age	n	Mean	Std. Deviation	Std. Error Mean	P value, t test
Low upper gingival margin	20-22-years	57	7.49	1.605	0.213	0.991
Low upper gingival margin	23-25-years	63	7.29	1.641	0.207	0.991
Small laterals	20-22-years	57	3.42	1.194	0.158	0.095
Small laterals	23-25-years	63	4.19	1.469	0.185	0.095
Normal gingival display	20-22-years	57	8.42	1.349	0.179	0.378
Normal gingival display	23-25-years	63	8.56	1.175	0.148	0.378
High upper gingival margin	20-22-years	57	6.51	2.292	0.304	0.003^*
High upper gingival margin	23-25-years	63	6.06	1.749	0.220	0.003^*
Straight smile arc	20-22-years	57	4.91	1.154	0.153	0.007^*
Straight smile arc	23-25-years	63	3.89	1.546	0.195	0.007^*
Midline shift	20-22-years	57	3.63	1.358	0.180	0.955
Midline shift	23-25-years	63	2.30	1.410	0.178	0.955
Aesthetic veneers	20-22-years	57	7.35	1.876	0.248	0.852
Aesthetic veneers	23-25-years	63	7.33	1.875	0.236	0.852

Note: *Statistically significant