Abstract : The relationship between the bone characters obtained by CBCT and primary stability of the implants
The aim of this study is to investigate the correlation between the thickness of the cortical bone or the voxel values that are obtained by cone beam CT (CBCT) and the insertion torque values (ITVs) or the implant stability quotient (ISQ) values.
A pig's ilium was used as the implant placement site. The implants used in this study were two kinds of diameters (3.8 mm, 5.0 mm) and two kinds of lengths (7.0 mm, 12.0 mm) having a general threadlike shape with a mechanically polished surface. To measure the bone density and the cortical thickness around the implants accurately, the CBCT scanning was performed immediately just after the formation of the implant cavity. The initial stabilities were evaluated by the ITVs and the ISQ values. The bone density and cortical thickness around the implants were measured by an implant simulation software (Landmarker ver. 5.0 with special specifications for this study). The relationships of the thickness of the cortical bone and the voxel values with the ITVs and the ISQ values were analyzed using Pearson's correlation coefficient. To evaluate the influence on the ITVs and the ISQ values among multiple factors, multiple regression analysis was performed. P < 0.05 was considered statistically significant.
A significant positive correlation was found between the thickness of the cortical bone and the ITVs or the ISQ values in all kinds of implants. In addition, a significant positive correlation was also found between the voxel values and the ITVs. From the multiple regression analysis, the thickness of the cortical bone and the voxel values had a positive influence on the ITVs and the ISQ values. In addition, the length of the implant had a positive influence on the ISQ values at the 3.8-mm-diameter implant.
In this limited study, there were correlations between the thickness of the cortical bone or the voxel values obtained from the CBCT scanning and the implant stabilities. Besides, it was confirmed that the thickness of the cortical bone, the voxel value, and the implant length had positive correlations with the ITVs and the ISQ values.
Serial posts:
- Abstract : The relationship between the bone characters obtained by CBCT and primary stability of the implants
- Background : The relationship between the bone characters obtained by CBCT and primary stability of the implants [1]
- Background : The relationship between the bone characters obtained by CBCT and primary stability of the implants [2]
- Background : The relationship between the bone characters obtained by CBCT and primary stability of the implants [3]
- Methods : The relationship between the bone characters obtained by CBCT and primary stability of the implants [1]
- Methods : The relationship between the bone characters obtained by CBCT and primary stability of the implants [2]
- Methods : The relationship between the bone characters obtained by CBCT and primary stability of the implants [3]
- Results : The relationship between the bone characters obtained by CBCT and primary stability of the implants
- Discussion : The relationship between the bone characters obtained by CBCT and primary stability of the implants [1]
- Discussion : The relationship between the bone characters obtained by CBCT and primary stability of the implants [2]
- Conclusions : The relationship between the bone characters obtained by CBCT and primary stability of the implants
- References : The relationship between the bone characters obtained by CBCT and primary stability of the implants [1]
- References : The relationship between the bone characters obtained by CBCT and primary stability of the implants [2]
- References : The relationship between the bone characters obtained by CBCT and primary stability of the implants [3]
- Acknowledgements : The relationship between the bone characters obtained by CBCT and primary stability of the implants
- Author information : The relationship between the bone characters obtained by CBCT and primary stability of the implants
- Additional information : The relationship between the bone characters obtained by CBCT and primary stability of the implants
- Rights and permissions : The relationship between the bone characters obtained by CBCT and primary stability of the implants
- About this article : The relationship between the bone characters obtained by CBCT and primary stability of the implants
- Table 1 Correlation between bone factors and stability factors : The relationship between the bone characters obtained by CBCT and primary stability of the implants
- Table 2 Statistical analysis of the results of the multiple regression analysis of the 3.8-mm-width implant : The relationship between the bone characters obtained by CBCT and primary stability of the implants
- Table 3 Statistical analysis of the results of the multiple regression analysis of the 5.0-mm-width implant : The relationship between the bone characters obtained by CBCT and primary stability of the implants
- Figure 1. The bone model in this study (a pig's ilium). (a) The whole picture of the ilium. (b) The flat part of the posterior margin of the ilium. (c) The CT image of the ilium. : The relationship between the bone characters obtained by CBCT and primary stability of the implant
- Figure 2. The implants in this study. Two kinds of diameters (3.8 mm, 5.0 mm) and two kinds of lengths (7.0 mm, 12.0 mm) having a general threadlike shape with a mechanically polished surface. : The relationship between the bone characters obtained by CBCT and primary stability of the implant
- Figure 3. The special implant cavity-forming device. This device is able to adjust the up-and-down movement speed and the rotation speed of the drill. : The relationship between the bone characters obtained by CBCT and primary stability of the implant
- Figure 4. Setting the evaluation site. An implant placement simulation software (Osaka Landmarker ver. 5.0 with special specifications for study purposes, iCAT, Osaka, Japan) was used as the image analysis software. The virtual implant was placed in the implant cavity by simulation. : The relationship between the bone characters obtained by CBCT and primary stability of the implant
- Figure 5. Measurement site of the voxel values. The width of the measurement site was defined as 0.50 mm, i.e., from 0.25 mm inside (the to-be-compressed area at the time of placement) to 0.25 mm outside (the same width of the aforementioned) of the virtual implant. : The relationship between the bone characters obtained by CBCT and primary stability of the implant