過去10年間におけるIMZ^®インプラントの生存率

―上部構造装着後2年以上経過症例についての検討―

抄録

IMZ^® Implants have been in clinical use at the PDI Attached Saitama Dental Clinic (Meikai University School of Dentistry, Post-Doctoral Institute of Clinical Dentistry) since 1989. In this study, the authors investigated 336 fixtures of cases over 2 years after the attachment of superstructures, by December 1999:
1. Number of patients according to the time elapsed since attachment of the superstructure to the fixture
2. Number of patients according to age
3. Number of fixtures implanted according to age
4. Number of fixtures implanted according to fixture size
5. Time elapsed since implantation according to fixture size
6. Number of fixtures according to implanted site
7. Defect state and number of fixtures
8. The connection between the fixture and natural teeth
9. Number of patients in whom fixtures were removed, and number of fixtures removed
10. Number of fixtures removed according to implanted sites, and rate of fixture removal
11. Number of fixtures removed according to fixture size, and rate of fixture removal
12. Survival rate (Minimal survival rate)
More small fixtures were implanted in our clinic than in other dental clinics, because bone width and anatomical problems were taken into account. The minimal survival rate of fixtures was 88.4%, when the fixtures of patients whom we were unable to follow up (those who did not revisit our clinic) were included in the number of fixtures removed. This figure is higher than that reported in other clinics, which may have important implications for the clinical value of IMZ^® Implants.