A Comparison between Primary and Secondary Flap Coverage in Ridge Preservation Procedures: A Pilot Randomized Controlled Clinical Trial

Table 3

Stent measurement at baseline and 6 months following extraction and ridge preservation.

	Variables	CFT		OFT		p value
		Mean±SD	Median (IQR)	Mean±SD	Median (IQR)
bone height at center	Baseline	13.8±2.8	15(5)	14.2±3.1	15(5)	0.551
	6 months following Sx	5.7±2	5.5(3)	6.7±2.9	6(4)	0.034
	Difference	8.1±1.9	8(3)	7.5±1.8	7(3)	0.389
	p Value		0.005		0.005
bone height at mid-buccal (BH)	Baseline	6.2±2.3	6(3)	6.1±1.7	6(2)	0.763
	6 months following Sx	5.4±2.3	5.5(3)	5.8±1.7	6(2)	0.157
	Difference	0.8±1	1(2)	0.3±1.1	0.5(1)	0.096
	p Value		0.046		0.429
bone width at 3 mm sub-crestal	Baseline	3.4±1.4	3(1)	4.2±2	4(4)	0.071
	6 months following Sx	3.5±1.1	3(1)	4.6±1.5	4.5(2)	0.031
	Difference	-0.1±1.1	0(1)	-0.4±1.6	-0.5(2)	0.257
	p Value		0.783		0.389
bone width at 5 mm sub-crestal	Baseline	3.3±1.3	3(2)	3.6±1.2	4(3)	0.366
	6 months following Sx	3.2±1.1	3(2)	3.7±1	3.5(2)	0.132
	Difference	0.1±0.3	0(0)	-0.1±0.5	0(0)	0.317
	p Value		0.317		0.564
Keratinized tissue width (KTW)	Baseline	3.7±1.2	4(2)	3.4±1.2	3.5(2)	0.18
	6 months following Sx	2±0.9	2(1)	3.4±1.2	3.5(2)	0.011
	Difference	1.7±0.6	2(1)	0±0	0(0)	0.004
	p Value		0.004		0.946
Pain (VAS scale 0-10)	24 hours following Sx	3±0.8	3(2)	1.1±0.5	1(0)	0.006
	2 weeks following Sx	0.8±0.9	1(1)	0.4±0.5	0(1)	0.132
	Difference	2.2±1.2	1(1)	0.7±0.4	0(1)	0.023
	p Value		0.006		0.008

p value <0.05
Note. CFT: closed flap technique, OFT: open flap technique, Sx: surgery.