Peri-implantitis is an inflammatory condition that traditionally causes redness, swelling, heat, pain, and dysfunction in patients. For peri-implantitis there are two clinical categories, namely peri-implant mucositis and true peri-implantitis. Peri-implant mucositis is an inflammation of the soft tissue mucosa around the implant and does not involve the bone tissue, so clinically the doctor will find redness and swelling of the patient’s surrounding gums, sometimes with pus overflow, and the patient may feel pain and discomfort, but after probing with a probe, it does not affect the osseointegration; whereas true peri-implantitis has affected the osseointegration and the patient sometimes In contrast, peri-implantitis in the true sense has affected the osseointegration and the patient sometimes presents pus or bone fractures, similar to the manifestations of periodontitis in natural teeth. In addition to the clinical examination and X-ray examination, the traditional dental film does not show any peri-implant shadows, and it is found that it does not affect the osseointegration, but only the mucositis of the implant, and the patient can be treated with mouth rinsing and anti-inflammatory treatment. This is because the bond between implant and bone is osseointegration, which is not the same as that of natural teeth. Normally there is no transmissive shadow around a healthy implant. If a transmissive shadow is found to already exist, it is already a clinical manifestation of peri-implantitis.