The study aims to evaluate the efficacy of ridge preservation with collagen sponge or collagen membrane in combination with collagenated bovine bone mineral in extraction sockets of periodontally diseased teeth.
Age ≥ 18 years
Need for molar extraction due to periodontal disease and plan for late implantation
No acute infection, such as abscess or effusion
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
Smoking
Pregnancy or lactation
Untreated periodontal disease
Severe systemic conditions that contraindicate surgery (such as diabetes, heart disease, cancer etc.)