Caroliene Meijndert

30 Chapter 2 Table 4. Bone level change. Mean change ± standard deviation of peri-implant marginal bone level (MBL) in mm, between T 1, T 12 and T 120 of treatment group Chin bone, Chin bone + Bio-Gide® and Bio-Oss® + Bio-Gide® . Chin bone (gr1) Chin bone + Bio- Gide® (gr2) Bio-Oss® + Bio- Gide® (gr3) Significance level between groups * Total of the groups T 1 -T 12 n=31 n=31 n=29 n=91 MBL mesial of implant -0.23 ± 0.81 -0.08 ± 0.90 -0.11 ± 0.49 p overall  = 0.73 -0.14 ± 0.76 MBL distal of implant -0.08 ± 0.36 -0.15 ± 0.48 -0.17 ± 0.57 p overall  = 0.69 -0.14 ± 0.47 T 1 -T 120 n=29 n=24 n=19 n=72 MBL mesial of implant -0.16 ± 0.91 -0.74 ± 1.20 -0.64 ± 1.46 p overall  = 0.19 -0.48 ± 1.19 MBL distal of implant -0.28 ± 1.23 -0.24 ± 1.05 -0.37 ± 1.47 p overall  = 0.92 -0.30 ± 1.24 T 12 -T 120 n=29 n=24 n=19 n=72 MBL mesial of implant 0.17 ± 1.05 -0.55 ± 1.08 -0.66 ± 1.45 p overall  = 0.04 gr1-gr2 p=0.03 gr1-gr3 p=0.05 -0.30 ± 1.24 MBL distal of implant -0.29 ± 1.07 -0.06 ± 0.98 -0.31 ± 1.41 p overall  = 0.73 -0.23 ± 1.15 * Overall significance level between groups was calculated using the One-way ANOVA. When a p-value ˂ 0.05 was found, the independent t- test related an observed significant difference to a specific group.