Patent ID: 7749267

Claim:
A guided bone regeneration system for augmenting bone between the bone and the periosteal tissue comprising: a device in the shape of an expandable pouch before being inserted inside the body for insertion between the bone and its periosteal tissues, and; a bone augmenting material, at least part of said bone augmenting material is bio-dissipative, all the bottom of said pouch, before being inserted inside said body is resistant to the passage of said bone augmenting material from inside said pouch downwards to beneath said pouch, said pouch before being inserted inside said body has at said bottom towards said bone a first substantially horizontal bone-contacting region which is perforated with more than one hole that allow bone tissue ingrowth and a second substantially horizontal periosteal tissue-contacting region at the top of said pouch towards said periosteal tissue which is resistant to epithelial tissue ingrowth, holes that allow epithelial tissue ingrowth are absent in said second region, wherein said pouch is filled with said bone augmenting material, said first region being configured, before being inserted inside the body, to retain said bone augmenting material within said pouch, wherein said holes are sized according to said bone augmenting material to resist the passage of said bone augmenting material through said holes, wherein said pouch is configured so said first region exhibits a first mean time to dispersion and said second region exhibits a second mean time to dispersion longer than said first mean time to dispersion, and wherein said pouch is being designed to allow bone tissue ingrowth through only one side of said pouch and to block epithelial tissue ingrowth through other sides of said pouch.