References %
(vital bone) 		%
(residual graft) 		% bone volume
(vital bone + residual graft) 		%
(connective tissue) 		Significance
Iasella et al. [21] Group RP:
28 (SD 14);
Group EXT:
54 (SD 12) 		Group RP:
37 (SD 18);
Group EXT:
no data 		Group RP:
65 (SD 10);
Group EXT:
54 (SD 12) 		No data P < 0.05
Perelman-Karmon et al. [46] Group A:
Bio-Oss®
29.7 (SD 7.21)%;
Group B:
Bio-Oss® + Bio-Guide®
40.8 (SD 10.61)% 		No data No data No data P < 0.05
Nam et al. [47] 10.4 (4.6) 18,7 (SD 7) 20.4 (SD 7.5) 70.8 (SD 8,7) P < 0.05
Barone et al. [48] Group RP:
35.5 (SD 10.4);
Group EXT:
25.7 (SD 9.5) 		Group RP:
29.2 (SD 10.1);
Group EXT:
no data 		No data Group RP:
36.6 (SD 12.6);
Group EXT:
59.1 (SD 10.4) 		P < 0.05

EXT = extraction alone; RP = ridge preservation.