Table 5.

Decrease in apical diameter in millimeters and percentage of the PRP and BC groups in the four evaluation periods

	PRP group (mean ± SD)	BC group (mean ± SD)	p value
3 months (mm, %)	0.25 ± 0.167 (9.91%±6.03%)	0.137 ± 0.063 (6.06% ± 3.7%)	0.008**
6 months (mm, %)	0.656 ± 0.43 (27.29%±14.1%)	0.42 ± 0.27 (18.24% ± 11.11%)	0.005**
9 months (mm, %)	2.17 ± 3.86 (51.98%±19.64%)	1.92 ± 3.9 (40.7% ± 21.43%)	0.002**
12 months (mm, %)	2.49 ± 3.93 (64.83% ± 18.5%)	2.2 ± 3.97 (53.45% ± 19.4%)	0.003**

^*Significant at p value <0.1

^**Highly significant at p value <0.05; SD, standard deviation