Tissue reactions after intraosseous implantation of three retrofilling materials.
Bone tissue reactions to EBA, IRM, and cyanoacrylate cement (Base Liner) were studied in the rat mandible using an intraosseous implant method. Osseous cavities (1.4 mm in diameter) were surgically created in the mandibles, and materials were implanted in 60 male Wistar rats. Each specimen was evaluated histologically after 4 and 8 weeks. The development of fibrous connective tissue in direct apposition to the material was observed in the EBA and IRM groups at 4 weeks. A slight degree of macrophage infiltration was seen in the EBA group. After the 8-week observation period, IRM and EBA were frequently separated from the bone cavity by a fibrous connective tissue layer (p < 0.01). The Base Liner appeared to be in direct apposition to the osseous tissue in several areas (p < 0.01). These findings indicate that Base Liner reacts favorably with osseous tissue, compared with the EBA and IRM materials tested and seems to be a biocompatible material.
Morinaga
Kazuki
K
Department of Endodontics, Tokyo Dental College, 1-2-2 Masago, Mihama-ku, Chiba 261-8502, Japan.
Nakagawa
Kan-Ichi
K
Carr
Gary B
GB
D000818:Animals; D001672:Biocompatible Materials / Q000494:pharmacology; D003238:Connective Tissue / Q000473:pathology; D003487:Cyanoacrylates / Q000494:pharmacology; D003738:Dental Cements / Q000494:pharmacology*; D017220:Dentin-Bonding Agents / Q000494:pharmacology; D008264:Macrophages / Q000473:pathology; D008297:Male; D008334:Mandible / Q000187:drug effects* / Q000473:pathology; D008422:Materials Testing; D008768:Methylmethacrylates / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar; D012184:Retrograde Obturation; D012387:Root Canal Filling Materials / Q000494:pharmacology*; D013997:Time Factors; D015035:Zinc Oxide-Eugenol Cement / Q000494:pharmacology
D001672:Biocompatible Materials; D003487:Cyanoacrylates; D003738:Dental Cements; D017220:Dentin-Bonding Agents; D008768:Methylmethacrylates; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; C031667:IRM cement; C084074:Super EBA