Abstract
This study was carried out to compare the effectiveness of two methods using expandedpolytetrafluoroethylene (e-PTFE) membrane and another poling film (Vinylidene Fluoride-Trifluoroethylene copolymers) as barrier membranes on bone regeneration around the immediate implants to obtain stable initial fixation and osseointegration.P3 and P 4 of six beagle dogs were removed and endosseous implants were placed into the remaining sockets. Group A's experiment site was covered with e-PTFE membrane, Group B's was covered with poling film, and the control group's was covered with only mucoperiosteum flap. Experimental periods were 2, 4, and 6 weeks; histopathological and bone histomorphometric observations were made.Especially in Group B, a greater amount of bone tissue was observed in an earlier stage. Bone density and mineralization in Group A were almost the same as in the control group but inferior to Group B in all experimental periods. Bone histomorphometric values showed that rates of mineral appositional, bone formation, and bone contact ratio were lower with e-PTFE membrane than poling film.From the results, both membranes had the potential to generate bone around dental implant. However, poling film had greater effect on activating bone formation and maturity of bone tissue than e-PTFE membrane in an earlier stage.
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