<unk>  or<unk>  is a surgical procedure that uses barrier membranes to direct growth of new bone at sites having insufficient volumes or dimensions for function or prosthesis placement.<unk>  is similar to<unk>  tissue<unk>  (GTR) but is focused on development of hard tissues instead of soft tissues of periodontal attachment. At present,<unk>  is predominantly applied in the oral cavity to support new hard tissue growth on an alveolar ridge to allow stable placement of dental implants. Used in conjunction with sound surgical technique,<unk>  is a reliable and validated procedure.
Guided bone regeneration
Bone grafting
Osteo-Odonto-Keratoprosthesis
Vitamin D deficiency surgery
Medical grafting
Osteoporosis surgery
Therapeutic angiogenesis
Osteoarthritis surgery