Table 1.
Mean and standard deviation of volume at the preoperative (preop) stage and at the 3-year survey (3yrs) of the alveolar bone, and their difference, ΔBV (with %ΔBV as its percentage) from the preoperative stage to the 3-year survey (preop→3yrs) in volume of interest (VOI).
| Times | BVpreop | BV3yrs | Preop vs. 3Yrs | ||
|---|---|---|---|---|---|
| Variable | Normality Test |
Variable | Normality Test |
p-Value | |
|
displacement (cc)
n = 23 |
1.17 ± 0.34 | 0.8662 ^ | 1.53 ± 0.39 | 0.7716 ^ | 0.0017 * |
|
filling (cc)
n = 20 |
1.24 ± 0.41 | 0.4291 ^ | 1.94 ± 0.68 | 0.1907 ^ | <0.0001 * |
|
displacement vs. filling
(p-value) |
0.8076 ° | 0.0352 ° | |||
|
sample size
(power 80%, α 0.05, β 0.2) |
878 | 54 | |||
| Times | ΔBV (Preop→3 yrs) | %ΔBV (Preop→3yrs) | Angle of Displacement | ||
| Variable |
Normality
Test |
Variable |
Normality
Test |
(Degrees) | |
|
displacement (cc)
n = 23 |
+0.36 ± 0.17 | 0.9983 ^ | +34 ± 21 | 0.0483 ^ | 31 ± 6 |
|
filling (cc)
n = 20 |
+0.71 ± 0.31 | 0.0467 ^ | +57 ± 13 | 0.4135 ^ | - |
|
distraction vs. grafting
(p-value) |
0.0001 ° | 0.0001 ° | |||
|
sample size
(power 80%, α 0.05, β 0.2) |
14 | 20 | |||
| Times | MBL (Preop→3yrs) | Mesial vs. Distal | |||
|
Variable
(Mesial) |
Variable
(Distal) |
Variable
(Mean) |
Normality
Test |
(p-Value) | |
|
displacement (mm)
n = 23 |
1.29 ± 0.63 | 1.66 ± 0.72 | 1.47 ± 0.38 | 0.9710 ^ | 0.1350 * |
|
filling (mm)
n = 20 |
1.35 ± 0.67 | 1.25 ± 0.78 | 1.30 ± 0.58 | 0.9248 ^ | 0.6980 * |
|
displacement vs. filling
(p-value) |
0.7977 ° | 0.0497 ° | 0.1026 ° | ||
|
sample size
(power 80%, α 0.05, β 0.2) |
3572 | 102 | 250 | ||
Marginal bone loss from the preoperative stage to the 3-year survey (preop→3yrs). Normal distribution test: ^ (Shapiro–Wilk test); statistical comparisons: * Wilcoxon signed-rank test assessing changes in time from the preoperative stage to the 3-year follow-up; ° Wilcoxon rank-sum test assessing changes between groups. Sample sizes calculated with a power of 80% and the probability of type I error of 5% obtained between the two groups for linear and volumetric outcomes.