The Effect of Hydroxyapatite Nanocrystals on Osseointegration of Titanium Implants: An In Vivo Rabbit Study

Table 3

Mean removal torque values and statistical comparisons.

	Number	Mean (SD)·Ncm	Median (min; max)
Three weeks
Noncoated	10	32.4 (8.1)	33.5 (16; 42)
HA coated	10	27.8 (9.1)	30.5 (10; 39)
Twelve weeks
Noncoated	9	49.3 (11.1)	54 (32; 62)
HA coated	9	38.2 (13.4)	40 (21; 61)
Distribution of the removal torque differences between three weeks and twelve weeks.
Rabbit	Difference; (noncoated-HA coated)	Rabbit	Difference; (noncoated-HA coated)
1	19	11	1
2	8	12	−3
3	7	13	2
4	13	14	−7
5	−15	15	30
6	3	16	8
7	−4	17	22
8	3	18	11
9	−3	19	—
10	15	20	36