Slim the face or not: 3D change of facial soft and hard tissues after third molars extraction: a pilot study

BMC Oral Health

Table 4 Paired-t test of µ, SD, RMS, STVC of the extraction side and non-extraction side in three time period

Metrics	Time period	Mean^*	Standard deviation^*	Shapiro-Wilk test	Significance	Paired t test	Significance
µ	T1-T0	-0.110	0.331	0.982	0.976	-1.372	0.189
	T2-T0	0.059	0.356	0.937	0.188	0.754	0.459
	T2-T1	0.122	0.471	0.927	0.222	1.037	0.316
SD	T1-T0	-0.044	0.118	0.947	0.414	-1.535	0.144
	T2-T0	0.013	0.117	0.958	0.485	0.497	0.625
	T2-T1	-0.045	0.139	0.910	0.115	-1.312	0.209
RMS	T1-T0	-0.018	0.163	0.926	0.184	-0.463	0.650
	T2-T0	0.103	0.229	0.862	0.007^**	***	***
	T2-T1	0.060	0.287	0.824	0.006^**	***	***
STVC	T1-T0	-0.808	1.821	0.955	0.535	-1.829	0.086
	T2-T0	0.220	1.546	0.976	0.866	0.653	0.521
	T2-T1	0.839	1.716	0.913	0.132	1.956	0.069

*The mean and standard deviation of the difference of the extracted side and the non-extracted side
**P < 0.05, so the data did not follow the normal distribution
***The data were analyzed by Wilcoxon signed rank test. The results showed that there was no significant difference in RMS of two sides (P > 0.05)

ISSN: 1472-6831