Comparison of the Anterior Tooth and Lip Esthetic Characteristics of Hani and Han Youth in China When Speaking

Figures & data

Figure 1 Quantitative indicators. (A) Upper labial height; (B) outer intercommissural width; (C) the upper central incisors display; (D) interlabial gap.

Table 1 The Display of Upper Central Incisors (mm, Mean±SD)

	Hani	Han	t	P
Rest position	0.73±0.16	0.30±0.10	2.203	0.029
“me”	4.84±0.16	3.51±0.10	−2.870	0.004
“yi”	3.12±0.43	3.55±0.59	−1.177	0.239
“si”	3.54±0.38	4.26±0.23	−3.410	0.001

Notes: If P>0.05, there was no statistical difference in display of upper central incisors between Hani and Han people; if P<0.05, there was statistical differences.

Table 2 The Lip Dynamic Aesthetics Characteristics When Pronounce “me” (mm, Mean±SD)

		Hani	Han	t	P
Up lip height	Rest position	8.28±1.69	8.78±1.77	−1.773	0.078
	“me”	7.82±1.79	8.21±1.73	−1.345	0.178
	The extent of mobility	−11.54%±0.11	−10.69%±0.11	−1.437	0.126
Mouth width	Rest position	51.16±3.59	48.59±5.44	3.457	0.001
	“me”	52.24.±3.96	50.93±7.47	1.373	0.172
	The extent of mobility	5.04%±0.06	5.21%±0.05	1.373	0.172

Notes: If P>0.05, there was no statistical difference in display of upper central incisors between Hani and Han people; if P<0.05, there was statistical differences.

Table 3 The Lip–Teeth Aesthetics Characteristics When Pronounce “yi” and “si” (mm, Mean±SD)

		Hani	Han	t	P
“yi”	The display of upper central incisors	3.12±0.43	3.55±0.59	−1.177	0.239
	Upper-lower lip distance	6.45±1.03	7.66±0.21	−0.442	0.658
	a/b	0.51±0.18	0.50±0.20	0.335	0.723
“si”	The display of upper central incisors	3.54±0.38	4.26±0.23	−3.410	0.001
	Upper-lower lip distance	6.72±0.12	8.04±0.16	−3.401	0.001
	a/b	0.56±0.16	0.50±0.21	1.874	0.063

Notes: If P>0.05, there was no statistical difference in display of upper central incisors between Hani and Han people; if P<0.05, there was statistical differences.

Table 4 The Position Relation Between Upper Central Incisor Edge and Lower Lip [mm, n (%)]

	Hani	Han	t	P
Contact	94 (35.21)	70 (26.22)	3.981	0.137
Separate	27 (10.11)	18 (6.74)
Overlap	26 (9.68)	32 (12.04)

Figure 2 Three kinds of position relations between upper central incisors edge and lower lip. (A) Separate; (B) contact; (C) overlap.