Table 1. ISQ values and PTVs before and after bone cement application (mean±standard deviation).
| Variables | ISQ values | PTVs | |||
|---|---|---|---|---|---|
| Direction A | Direction B | Direction A | Direction B | ||
| Before bone cement application | |||||
| D0 | 84.5±2.1 | 84.8±2.4 | −6.2±0.3 | −6.4±0.5 | |
| D2 | 81.8±2.1 | 81.9±2.1 | −5.8±0.6 | −5.6±0.6 | |
| D4 | 73.9±3.1a) | 74.0±3.1a) | −3.0±1.6a) | −1.5±3.1a) | |
| D8 | 60.3±5.9a,b) | 61.2±6.2a,b) | −0.3±2.5a) | 1.8±2.8a,b,c) | |
| After bone cement application | |||||
| D0 | - | - | - | - | |
| D2 | 83.6±1.6d) | 84.0±1.8c,d) | −6.3±0.7d) | −6.1±0.6d) | |
| D4 | 79.7±2.6b,d) | 79.6±2.8b,c,d) | −5.1±1.1b,d) | −4.1±2.3d) | |
| D8 | 78.2±2.3b,d) | 77.9±2.1b,c,d) | −3.1±1.4b,d,e) | −2.3±1.4b,c,d,e) | |
D0: group with no dehiscence; D2: group with a 2-mm-wide dehiscence defect; D4: group with a 4-mm-wide dehiscence defect; D8: group with a 8-mm-wide dehiscence defect; Direction A: from the aspect with the defect; Direction B: from the opposite aspect of the defect. To analyze the directions before bone cement application, the paired t-test was used in groups D0 and D8 for ISQ values, and in groups D0, D2, and D4 for PTV (the Wilcoxon signed rank test was used for the other comparisons). To analyze the directions after bone cement application, the paired t-test was used for all comparisons. The Friedman test was used to assess intergroup statistical differences before bone cement application, and repeated-measures analysis of variance was used to assess intergroup statistical difference after bone cement application. The Wilcoxon signed rank test was used to analyze intragroup statistical differences in groups D2 (ISQ value in direction A) and D8 (ISQ value in direction B, PTV in direction A), and the paired t-test was used for the other intragroup comparisons.
ISQ: implant stability quotient, PTV: Periotest value.
a)Statistically significant difference compared to D0; b)Statistically significant difference compared to D2; c)Statistically significant difference compared to direction A; d)Statistically significant difference between before and after bone cement application; e)Statistically significant difference compared to D4.