Repair of Cranial Defects in Rabbits with 3D-Printed Hydroxyapatite/Polylactic Acid Composites

Table 2

Hardness values of the experimental group, control group, and normal group at 30 days and 90 days after surgeries.

Matched group		Mean difference	Standard error of mean difference	95% confidence interval of standard deviation
				Lower limit	Upper limit
30 days
1	Experimental group-control group	-4.8688	0.2244	-5.3278	-4.4098	-21.693	0.001
2	Experimental group-normal group	11.2634	0.1909	-11.6537	-10.8731	-59.017	0.001
3	Control group-normal group	-6.3946	0.2180	-6.8405	-5.9487	-29.331	0.001
90 days
1	Experimental group-control group	0.6634	0.4895	-0.3378	1.6645	1.355	0.186
2	Experimental group-normal group	0.5464	0.5315	-0.5406	1.6334	1.028	0.312
3	Control group-normal group	-0.1170	0.5107	-1.1615	0.9275	-.229	0.820