With the progress of the times, more and more people will choose dental implants, although the dental implant surgery can improve the defects of the teeth to a certain extent. The procedure can also be risky, as improper operation or post-operative care may cause some harm to the human body. 1. Infection: Incomplete sterilization of the surgical site, contamination of the surgical area or surgical instruments, and poor local hygiene after implantation can cause infection. In addition, the root of the dental implant and the bridge are not connected in place, and food residues are retained in the local area, which will easily breed germs, thus leading to chronic inflammation of the gums and even gingival hyperplasia; 2. Bleeding: Dental implant surgery requires periosteal stripping, which can damage the blood vessels under the mucosa and easily cause bleeding of the gums. If the implant is poorly positioned and penetrates the jawbone, it can cause submucosal or subcutaneous bruising; 3. Perforation: During the healing phase after the dental implant surgery, poor suturing and residual suture stimulation during the surgery can cause the wound to split open, and if it presses on the gum tissue, it can cause ulceration of the gums. In serious cases, the gum tissue covering the implant will be perforated; 4, nerve damage: not to the professional regular hospital, the surgeon is not technically qualified, the implant process caused local nerve damage, which may lead to the phenomenon of lower lip numbness; 5, implant breakage: If the dental implant is hit by a large external force after surgery, it may lead to the loosening, falling off or even breaking of the implant, so that the implant is broken and can no longer The implant can no longer be used.