Results : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [2]
Average ISQ tended to increase during the healing period in all IT groups (Fig. 5). Average ISQ of the low IT group was 59.81 at 0 week, increasing significantly after ≥ 8 weeks (P < 0.01). The average ISQ values of the medium and high IT groups at 0 week were 73.25 and 68.85, respectively. The average ISQ increased in a time-dependent manner at each group.
Total average ISQ in this study was 73.3 ± 9.6; therefore, an expedient reference value was defined as the ISQ 73, then the percentage of specimens showing ISQ ≥ 73 was determined (Fig. 6). ISQ ≥ 73 was observed from 8 to 12 weeks in the low IT group and from 4 to 6 weeks in the medium and high IT groups. Significant differences in the incidence of ISQ ≥ 73 was recognized at the medium and high IT groups (corresponding t test, P < 0.05).
In this study, conditions and environments for CT imaging in each facility were different. Bone quality was investigated at 18 treatment areas (8 in the maxilla, 10 in the mandible) on CBCT performed under standardized conditions, as shown below. CBCT was performed using a 3DX Multi-Image Micro CT FPD 8 system (J. MORITA MFG., Kyoto, Japan) (tube voltage, 80 kV; imaging area, 80 × 80 mm), and voxel values were measured with coDiagnostix™ 9.7 (dental wings, Montreal, Canada).
There was no difference of average voxel value between the maxilla and the mandible (Fig. 7). In comparison between average voxel values and IT groups, the low and medium IT groups showed no significant differences, but the high IT group showed voxel values ≥ 40% higher than the other groups (Fig. 8). A significant difference was observed between the low/medium IT groups and the high IT group (P < 0.05). A significant difference was observed between the low/medium IT groups and the high IT group (P < 0.05). Also, voxel values at each part of the implant (neck, middle apex) were compared with IT < 40 and ≥ 40. The results suggested that the neck and apex parts in the ≥ 40 IT group showed significantly higher voxel values than the middle and apex parts of the < 40 IT group (P < 0.05) (Fig. 9).
Serial posts:
- Abstract : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region
- Background : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [1]
- Background : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [2]
- Methods : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [1]
- Methods : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [2]
- Methods : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [3]
- Results : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [1]
- Results : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [2]
- Discussion : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [1]
- Discussion : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [2]
- Discussion : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [3]
- Discussion : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [4]
- Discussion : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [5]
- Conclusions : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region
- Abbreviations : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region
- References : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [1]
- References : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [2]
- References : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [3]
- References : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [4]
- Author information : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [1]
- Author information : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [2]
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- About this article : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region
- Table 1 Treatment area and size of implant body : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region
- Table 2 Result of IT and ISQ : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region
- Fig. 1. Genesio® Plus implant with Aanchor surface. Scheme of the dental implant body for the Genesio® Plus implants with Aanchor surface used. a Overview picture of Genesio® Plus implants with Aanchor surface. b Image from scanning electron microscopy. Both pictures were provided by GC Corporation. To obtain osseointegration from an early stage, the dental implant body was treated with sandblasting and acid etching from the neck to apex : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implant
- Fig. 2. The measurement of the voxel values. A case of bone quality diagnosis before treatment. Width and height of the bone were measured to select the proper size of the implant body. The selected implant body was simulated on the bone images as a symbol, and then the voxel value was calculated as described in the “Methods” section : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implant
- Fig. 3. The evaluation of the average ISQ. Time-lapse migration of average ISQ. Average ISQ of all specimens increased in a time-dependent manner (results indicated by a line). A significant difference was observed by 6 weeks after surgery : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implant
- Fig. 4. The classification of the insertion torque. All specimens classified into three groups according to insertion torque. Criteria for the classification are shown in the figure and in the “Methods” section : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implant
- Fig. 5. The comparison of ISQ values by the insertion torque. Time-lapse migration of ISQ values was compared with IT groups. Each IT group displayed similar migration. A significant difference in The ISQ was found in the low IT group after 8 weeks : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implant
- Fig. 6. The relationship between ISQ and insertion torque. Percentage of specimens showing ISQ ≥ 73 compared with groups by week. In all groups, a period of rapidly increasing percentages was observed (8–12 weeks in the low IT group, 4–6 weeks in the medium and high IT groups). In the medium and high IT Group, a statistically significant difference was observed between ISQ ≥ 73 and ISQ < 72 (P < 0.05) : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implant
- Fig. 7. The average voxel value between the maxilla and mandible. There was no difference between the maxilla (430.9 ± 211.6) and the mandible (475.6 ± 211.5) in the average voxel value. Also, no difference was found in each part : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implant
- Fig. 8. The relationship between average voxel value and insertion torque (averaged over the entire treatment area). The comparison of average voxel value among IT groups. Average voxel value was 384.0 ± 154.6 in the low IT group, 387.7 ± 147.7 in the medium IT group, and 619.2 ± 200.4 in the high IT group : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implant
- Fig. 9. The comparison of two groups at average voxel values for each part. The comparison of voxel values by insertion torque. All specimens were classified into two groups by insertion torque < 40 and ≥ 40. The < 40 group represents a combination of the low and medium IT groups : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implant