الفهرس 
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Abstract
The present study was performed to evaluate the use of resorbable and non-resorbable guided tissue regeneration membranes with and without DFDBA to enhance healing of surgically created osseous continuity defects in the mandibles of dogs.
Twelve healthy, adult dogs were included in this study; their weight was ranging from 10-15 kgs.
According to the type of membrane used, the twelve dogs were divided into two equal groups with six dogs each.
group I, in which the osseous defects were covered with the nOI11resorbable IMTEC Biobarrier membrane.
group II, in which the osseous defects were covered with the resorbable Etik patch periodontal membrane.
According to the presence or absence of DFDBA, each group was further subdivided into two subgroups CA) and CB).
In both groups I and II, the osseous defects of subgroups A were grafted with DFDBA, while those of subgroups B were left to be filled with normal blood clots.
Under Nembutal general anesthesia, a submandibular incision was made at the lower border of the mandible, and the periosteum was reflected to expose the bone.