Periodontal Healing of Canine Experimental Grade III Furcation Defects Treated With Autologous Fibrinogen and ResolutÂ® Barrier Membrane
Bianucci, Henri Chapman Jr.
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Experimental grade III furcation defects were developed bilaterally at the second and fourth premolars in 18 conditioned, laboratory-source, adult Beagles and maintained for 12 weeks. All defects were treated with debridement and mucoperiosteal flap repositioning alone, or with the addition of autologous fibrinogen, ResolutÂ® barrier membrane, or autologous fibrinogen and ResolutÂ® barrier membrane. The defects were analyzed by digital subtraction radiography, histopathologic, and histomorphometric analysis of healing at 1, 3, and 6 months post-treatment to determine: percent increase in defect bone volume, height and area, and length of periodontal regeneration along the perimeter of the defect. Comparisons at post-treatment intervals indicated significantly (P < 0.05) greater healing of debridement and autologous fibrinogen treated defects at 3 months, however by 6 months there were no significant differences in defect healing for all histomorphometric parameters. Defects receiving ResolutÂ® were associated with significantly less root ankylosis. Defects receiving debridement alone had significantly greater increases in bone volume, as calculated with digital subtraction radiography, at 6 months post-treatment compared with groups receiving ResolutÂ®. There was a significant correlation between regenerated bone area, bone volume, and periodontal regeneration for all treatments at 3 and 6 months post-treatment. In this study autologous fibrinogen and ResolutÂ® barrier membrane did not enhance the amount of periodontal healing compared with debridement only. However, ResolutÂ® treated defects were essentially absent of root ankylosis. Therefore, canine periodontitis causing grade III furcation involvement may respond equally well to conservative periodontal surgery compared with guided tissue regenerative techniques. However, the prevention of root ankylosis may provide a substantial benefit favoring this latter methodology.
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