Performance and Safety of the Resorbable Collagen Membrane "Ez Cure"

Inclusion Criteria: * Male or female aged from 18 to 70 * Periodontal defects (e.g. cyst, bone tumour, crest augmentation...) * Aleveolar bone defect after tooth (teeth) extraction * Non opposition form (consent of the patient) * Patients affiliated to the French social security * Patients not under guardianship or judicial protection Exclusion Criteria: * Pregnancy of breastfeeding women * Severe smoker (\>10 cigarettes per day) * Acute infections * Allergies to the material (if an allergy of any kind is suspected, adequate exams must be carried out in advance) * Refusal of the patient to adhere to surgical follow-up and to the limit in activity level * Fever and/or local inflammation * HIV positive known * History of uncontrolled diabetes (untreated or not stabilized by treatment) * History of treatments for previous corticosteroids, long-term (more than 6 months) and interrupted for less than 3 months * History of chemotherapy in progress or during the last three months * History of cervico-facial radiotherapy * History of bone disease with disorders of blood circulation which is defined as Akbers-Schönberg disease or Paget's disease * Known severe hyperparathyroïdism * History of severe immune deficiency