Site Preservation Was Performed Through an Open Healing Oral Restorative Membrane

Inclusion Criteria: * 1: Age ≥18 years old 2: The affected teeth did not have the conditions for immediate implant placement: thin gingival biotype, labial bone plate thickness \<1 mm, the labial bone plate was missing, the distance between the labial bone plate crest and the cemento-enamel junction\>3 mm 3: No systemic diseases and good oral hygiene 4: Be willing to receive treatment and regular follow-up and review, and signed the informed consent Exclusion Criteria: * 1: Uncontrolled systemic diseases, such as heart, liver and kidney diseases, systemic infections, diabetes, etc 2: Women who are pregnant or lactating 3: Taking bisphosphonates, glucocorticoids and other drugs that affect bone metabolism for a long time or within 5 years 4: Patients receiving oral and maxillofacial radiotherapy in the past five years 5: Patients suffering uncontrolled periodontal disease