インプラント経過不良21例の臨床的検討

抄録

In the present study, patients hospitalized due to secondary accidental events and poor prognosis after primary implant therapy were reported. On the basis of clinical evaluation, some data was added to the knowledge about implant therapy complications.
1. Twenty-one patients with 36 implants were examined in this study. The patients were aged 40 to 70 years, sex was not taken into consideration.
2. At admission, for almost all of the patients, the chief complaints were a combination of complications of peri-implant gingival hyperplasia, drainage, and orther abnormalities.
3. As for implant locations, in most cases the implants were inserted into molar or premolar positions of both maxilla and mandible.
4. In the majority of patients (20 of the 21 patients), the removed implants were of the osseointegrated type, and many patients had implants coated with hydroxyapatite (HA).
5. At the time of implant removal, clinical findings revealed abnormalities in the following order of occurrence:jaw ostitis was detected in the largest number of cases (8 of the 21 cases), other cases demonstrated maxillary sinusitis, paresthesia and jaw osteomyelitis.
6. The shortest period from implant insertion to implant removal was 1 month, and the longest, 14 years 3 months.
7. In 19 of the 21 patients, implant removal was used as a treatment method. The remaining 2 patients, whose implants were not removed, complained of paresthesia in the course of clinical observation.