Background : Prospective multicenter non-randomized controlled study on intraosseous stability and healing period for dental implants in the posterior region [1]
Dental implant treatments have improved in both convenience and predictability with refinements in implant bodies and treatment procedures as compared to about 50 years ago when clinical applications were started. Currently, an implant body surface is treated with “rough processing” by sandblasting and acid etching for the purposes of obtaining more reliable osseointegration and shortening treatment period. Despite previous reports about the healing period when implant bodies treated in this the procedure, a common consensus has yet to be obtained [1,2,3].
With implant treatment, the healing period refers to the period until an inserted implant body acquires osseointegration and can be loaded with occlusal force [4, 5]. In order to shave off the healing period, various method in which occlusal force was immediately or early loaded on the inserted implant body have been reported. However, theories on the therapeutic effect of immediate loading or early loading of implant treatment were not unified [6, 7]. “Quantity and quality of bone in treatment area,” “primary stability after implant insertion,” and “intraosseous stability during the healing period” are regional factors related to the acquisition and maintenance of osseointegration [8,9,10].
Usually, bone quantity and bone quality are evaluated by morphometry of computed tomography (CT) images and analysis of voxel values, and primary stability is evaluated as insertion torque (IT). Intraosseous stability of the implant during the healing period is estimated from X-ray images, the Periotest, or a resonance frequency analysis device [11,12,13,14,15]. The estimation procedure with a non-contact-type resonance frequency analysis device has been recognized as a non-invasive and reproducible procedure [16].
Intraosseous stability of an implant that is measured with a non-contact-type resonance frequency analysis device is evaluated as ISQ value. Insertion torque (IT) value and ISQ value are important indicators of implant treatment. However, the relationship between IT and ISQ is unclear. Some articles have reported positive correlations between IT and ISQ [15, 17], but others have found no correlation [18,19,20].
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