The hazards of dental implants for the elderly are as follows: 1. Older people are older, have degenerative functions, more basic diseases, and an increased chance of disease in major organs, including hypertension, diabetes, cardiovascular disease, osteoporosis, etc., and even a combination of several diseases, which poses a higher risk for dental implant treatment; 2. Older people have more gingivitis and periodontal disease, and have a higher risk of peri-implantitis and implant failure rate. . Therefore, patients with periodontal disease must be evaluated for oral localization, systemic condition, and lifestyle habits before treatment to develop a plan for implantation and avoid risks; 3. Elderly people generally have poor bone quality, poor osteogenic ability compared to young people, poor surgical tolerance, and metabolic disorders can lead to imbalance in bone formation and resorption, which affects the osseointegration of implants and increases the failure rate; 4. Elderly patients with missing teeth have poor occlusal force and implants The stress is concentrated, making the implant overload.