Dental implants need to meet the following two conditions: 1. systemic conditions: the physical condition can be competent for surgery, exclude serious hypertension, coronary heart disease, diabetes and other diseases that affect bone healing, or actively treat the underlying disease; 2. local conditions: the alveolar bone needs to be completely healed after jaw trauma or surgery or tooth extraction, and the acute inflammation in the oral cavity needs to be treated and controlled, as dental implants are 10-14 cm long and 3-4 cm in diameter. 14cm long and 3-4.5cm in diameter, the bone needs to have a certain height and thickness.