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

Table 1

Mean values from hardness tests of the experimental group, control group, and normal group at 30 days and 90 days after surgeries.

Group	Mean (hv0.05)	Standard deviation	Standard error of the mean
30 days
Experimental group	10.83480	0.976071	.180031
Control group	15.70360	1.017893	.184015
Normal group	22.09820	.605393	.128787
90 days
Experimental group	24.44777	2.778524	.489029
Control group	23.78440	2.520406	.441904
Normal group	23.90140	1.158265	.209643