TABLE 1.

Alveolar ridge dimensional change (mm) of four ridge preservation approaches

Variable	Blood clot	A-PRF	A-PRF+FDBA	FDBA
Loss of ridge height	3.8 ± 2.0	1.8 ± 2.1*	1.0 ± 2.3†	2.2 ± 1.8
Loss of ridge width (coronal)	2.9 ± 1.7	2.8 ± 1.2	1.9 ± 1.1	2.5 ± 1.1
Loss of ridge width (middle)	1.8 ± 1.3	1.8 ± 1.8	1.7 ± 1.2	1.5 ± 1.2
Loss of ridge width (apical)	1.5 ± 1.6	1.8 ± 1.5	1.6 ± 1.5	1.2 ± 1.3

Data are expressed as the mean ± SD

^*P < 0.05, statistically significant difference compared to blood clot (ANOVA and student’s t-test)

^†P < 0.01, statistically significant difference compared to blood clot (ANOVA and student’s t-test