Guided tissue regeneration combined with a creation of an extra supracrestal bone space in surgically produced dehiscence-type defect. An experimental study in the dog

ABSTRACT

The purpose of the present investigation was to evaluate the use of mechanic barrier far from the radicular surface to archieve a supracrestal space in the guided tissue regeneration-procedure over teeth with dehiscence-type defects in 3 mongreal dogs. Two 4th premolars were used in each dog. Following the elevation of a mucoperiosteal flap, exposed root surface was scaled and planned. Prior to suturing, in each dog, a mechanic barrier (Millipore filter) strip of steel matrix nd the barrier werenÆt applied. The histological analysis after 3 months revealed a limited new a similar length of dento-gingival epithelium for both groups. Tehre was statistically significant difference in the suggest that the mode of mechanic barrier application used to achieve a supracrestal space is critical to its proper performance in the guided tissue regeneration-procedure