Clinical Research Directory

Inclusion Criteria: * Age:20-60 years old, gender unlimited * Good oral hygiene * No systemic diseases * There are irreparable residual roots, no obvious apical periodontitis, no looseness greater than degree II, and the tooth position includes four quadrant anterior teeth and premolars * Root length greater than 10 mm, and no significant bone resorption at the alveolar crest * There is no significant displacement of adjacent teeth and no significant elongation of opposing teeth * The bone density of the target implant area is Class II and Class III * The lateral bone wall of the lips (cheeks), palate (tongue) is intact and larger than 1mm * The subjects are able to understand the purpose of the experiment, willing to -cooperate with surgical treatment and follow-up, voluntarily participate in the experiment, and sign an informed consent form. Exclusion Criteria: * Patients with moderate to severe periodontitis * Missing proximal and distal adjacent teeth in the target residual root * Residual roots with root adhesion * The target implant area has a bone density of Class I or IV * Acute infectious disease or metabolic bone disease activity period * Patients with diabetes history and poor blood glucose control (fasting blood glucose ≥ 8.8 mmol/L L) * Patients with liver and kidney dysfunction (AST, ALT ≥ 1.5 times ULNULN, creatinine ≥ 1.5 times ULNULN) * Individuals with a history of osteoporosis * Individuals with a history of malignant tumors or other serious illnesses who are not suitable for surgery * Individuals with mental disorders and lack of autonomous behavior ability Pregnant women, lactating or menstruating women, and women with pregnancy plans within six months * Various possible causes of imaging artifacts in the surgical area * Receiving medication that may affect bone metabolism (such as bisphosphonates) within the past 3 months * The researchers estimate poor compliance or other factors that are not suitable for conducting this experiment.