Efficacy of Collagen Sponge Versus Collagen Membrane on Ridge Preservation of Periodontally Compromised Teeth

Inclusion Criteria: 1. Age ≥ 18 years 2. Need for molar extraction due to periodontal disease and plan for late implantation 3. No acute infection, such as abscess or effusion 4. Presence of bone defects on at one or two socket walls, where the height of the horizontal (suprabony) component of the defect (alveolar bone crest - cement-enamel junction) is \>50% of the corresponding root length and the bone height of socket walls is at least 3 mm 5. Presence of one adjacent tooth to the extraction site Exclusion Criteria: 1. Smoking 2. Pregnancy or lactation 3. Untreated periodontal disease 4. Severe systemic conditions that contraindicate surgery (such as diabetes, heart disease, cancer etc.) 5. Under radiotherapy 6. Systemic disease or medication that influences bone metabolism and mucosal healing (such as immunosuppressants, phenytoin, bisphosphonates etc.) 7. Extraction of multiple adjacent teeth 8. Allergy to any of the materials used in the study