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A clinical review was performed on patients who requested implantation and visited the Nippon Dental University Hospital during the five years from April 1985 to June 1990. This report describes patient characteristics and treatment results. 1. The total number of new patients was 127 (68 males and 59 females). Their ages ranged from 20 to 80 years. 2. The number of patients who were diagnosed with an indication for implantation and completed the 1st stage operation was 39 (30.7%). An additional 23 patients (18.1%) entered preoperative treatment and are waiting for their operation. Overall, implantation was indicated in 48.8% of all new patients. 3. The ages of patients at fixture installation ranged from 20 to 79 years (mean 60.54, S.D. 11.21) among the 39 patients (20 males and 19 females) who completed the 1st stage operation. As for the number of jaws, implantation was indicated in 40 jaws (21 in male patients and 19 in females). Maxillary implants were indicated in 8 jaws and mandibular implants were indicated in 32 jaws (1 male patient had indications in both jaws). 4. The total number of implanted fixtures was 198, of which 39 were installed in the maxilla, and 159 in the mandible (1 female patient was 5 mandibular fixtures installed at the University of British Columbia, Canada). 5. Of the fixtures implanted in 40 jaws, 94.9% of maxillary fixtures and 98.1% of mandibular fixtures remained stable after the 1st stage operation.(ABSTRACT TRUNCATED AT 250 WORDS)

Dental implant has tried at the early stage in 19th century recovering an oral function and esthetics. Technological revolutions in biochemical and new materials have developed on the remarkable change in the dental implants, nowadays we call the three generation therapy for dental implantology. There are many kinds of methods and techniques in dental implants, however a lot of troublesome complication on the process of surgical phase, construction of prothodontics and prognosis of maintenance care. In the proceedings of this symposium, I would like to propose you how to manage the maintenance care for various kind of dental implants through the methodology and case presentations. Tendenay and future for dental implants The current outlook of dental implant has increasing supply and demand not only dentists but also patients. According to Japanese Welfare Ministry's report in 1987, average missing teeth over sixty years old generations are approximately 42% in accordance with NIDR (U.S.A.) research. They are missed on ten over teeth in full 28th teeth dentitions owing to dental caries and periodontal diseases. Generally speaking, latent implant patients are occupied on the same possibility of needs for dental implants both Japan and U.S.A. Management of maintenance care The patients hardly recognized the importance of plaque control for the maintenance care in the intraoral condition after implantation. Dentists and dental staffs must be instruct patients for importance of plaque removal and control, because they already had forgotten the habit of teeth cleaning, especially in the edenturous conditions. 1) Concept of establishment in oral hygiene. Motivation and instruction for patients include very important factors in dental implants as well as in periodontal diseases. Patients who could not achieve on good oral hygiene levels obtained no good results in the long term observations. To establish good oral hygiene are how to control supra plaque surrounding tissues with patient himself. Ultimate concept of implantology have supported common concordance with periodontal therapy. 2) Patients consent and co-operation the right of informed consent, agreement to treatment by the patient has been gaining increased importance to implantology. Even the patient has consent, they must co-operate the process of dental implant with co-therapist (Fig. 2). 3) The clinical examination of clinical parameters in dental implants. (1) Plaque Index (Silness & Loe 1964) and Plaque Control Record (0 Leary 1978) (Table 5). (2) Gingival inflammation (Fig. 3). Ordinarlly, Gingival Bleeding Index (GBI Ainamo & Bay 1975) and Papilla Bleeding Index (Saxer & Jühlemann 1975) are used. (3) The depth of peri-implant sulcus with the plastic probe. (NDU style) (Fig. 4).(ABSTRACT TRUNCATED AT 400 WORDS)