In recent years, various complications of implant treatment have been reported, as such treatments are now performed in various other clinics. To reduce such cases, it is important to clarify the problems that have troubled many dentists and patients. We therefore conducted a retrospective clinical study of complicated cases at other clinics.
From 2001 to 2008, 66 patients consulted the Department of Oral and Maxillofacial Surgery, Kyushu University Hospital after problems caused by implant treatment.
1. Complicated cases tended to increase year by year.
2. The average age was 62.0 years, with a female to male ratio of 2:1.
3. Ten patients consulted our department themselves, 15 patients were referred by the dentists who had performed the implants, and 41 patients were referred by dentists who had not performed the implants.
4. Chief complaints were abnormality of the implant circumference (18 cases), neuropathy and mobility (11 cases each), without symptoms (8 cases), occlusal pain and examination of the relationship between implants and other symptoms (5 cases each), nasal symptom and implant fracture (3 cases each), and implant discomfort and dysgeusia (1 case each).
5. Implant types were the root form type (45 cases), blade type (13 cases), home-made type (7 cases) and subperiosteal type (1 case).
6. The total number of implants was 236 (root form type: 165, blade type: 17, home-made type: 53, subperiosteal type:1). The average number of implants was 3.6.
7. Superstructures of implants were connected to implants or a single in 17 cases, to natural teeth in 32 cases, and not set in 17 cases.
8. Regarding the number of years elapsed from implant treatment, 33 cases were less than 5 years (7 cases were less than 1 month), and 19 cases were more than ten years.
9. Regarding the duration before receiving a medical examination after symptoms developed, 83.3% of cases received an examination within 3 years.
10. The diagnosis was peri-implantitis in 36 cases, neuropathy in 11, implant fracture in 6, migration into the maxillary sinus in 4, and other diagnosis in 9.
11. Implant removal was performed in 37 cases, other surgical treatment in 4, conservative management in 12, treatment of referred pain in 2, and no treatment in 11.
Complicated cases will increase in future as the use of implant treatment spreads. Therefore, there is an urgent need to enhance the education system, clear diagnostic criteria and guidance for medical care for implant treatment.
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