Study New bone formation
(%) 		Residual graft material (%) Lamellar bone
(%)
Lee et al. [19] Autogenous teeth: 57.19 (11.16) Not evaluated Not evaluated
Synthetic hydroxyapatite: 34.07 (13.09)
No difference (P > 0.05)a
Sohn et al. [20] Blood clots:
2 weeks: 8.46 (1.88),
4 weeks: 17.8 (2.63),
8 weeks: 12.1 (2.71) 		Blood clots:
2, 4, 8 weeks: not evaluated 		4 weeks: 2.21 (0.69),
8 weeks: 10.45 (2.1)
Anorganic bovine bone:
2 weeks: 16.09 (1.52),
4 weeks: 18.91(1.96),
8 weeks: 19.65 (1.81) 		Anorganic bovine bone:
2 weeks: 36.74 (3.94),
4 weeks: 32.97 (2.59),
8 weeks: 35.21 (3.16) 		4 weeks: 1.48 (0.3),
8 weeks: 4.85 (0.47)
β-TCP:
2 weeks: 15.05 (1.21),
4 weeks: 20.13 (2.3),
8 weeks: 20.73 (1.99) 		β-TCP:
2 weeks: 37.19 (3.08),
4 weeks: 29.43 (3.2),
8 weeks: 21.01 (3.4) 		4 weeks: 1.46 (0.4),
8 weeks: 4.04 (0.52)
DTD:
2 weeks: 17.71 (2.2),
4 weeks: 20.73 (1.99),
8 weeks: 28.09 (1.51) 		DTD:
2 weeks: 44.41 (5.26),
4 weeks: 28.25 (3.68),
8 weeks: 14.04 (3.17) 		4 weeks: 1.31 (0.3),
8 weeks: 4.7 (0.59)
At 8 weeks:
significant greater in DTD group than β-TCP group 		DTD: significantly less than Bio-Oss®
or β-TCP area at 8 weeks
(P < 0.05) 		Significantly higher in blood clots group
(P < 0.5)
Xu et al. [21] DHT:
2 weeks: 5.54 (0.5),
8 weeks: 19.45 (2.06) 		DHT: 41.01 (2.23) and 9.62 (1.02); P < 0.5 8 weeks: 6.08 (0.65)
Bio-Oss®:
2 weeks: 5.94 (0.36);
8 weeks: 4.83 (0.41) 		Bio-Oss®:
2 weeks: 29.03 (2.32),
8 weeks: 25.53 (2.15) 		8 weeks: 5.36 (0.45)
Significantly higher in DHT group - Increased amount in DHT (P < 0.5)

aNo statistical significant difference due to small number of experimented animals.
DHT = demineralized human particulate tooth bone; DTD = demineralized tooth dentin; β-TCP = β-tricalcium phosphate.