Maxillary sinus augmentation model in rabbits: effect of occluded nasal ostium on new bone formation.
This study was undertaken to establish an experimental model for maxillary sinus augmentation in rabbits and to clarify the bone response to the occluded nasal ostium. In rabbits without ostial occlusion, the elevation of the sinus mucosa resulted in formation of a subantral hollow space filled with blood clots and granulation tissue 1 week after operation. The newly formed bone filled in the space had a central granulation tissue. The space was almost completely replaced by a normal sinus airspace after 3 weeks. In rabbits with ostial occlusion, a fully formed bone mass was seen after 3 weeks. The mass had both mature trabeculae and peripheral cortical bone containing no sinus airspace after 6 weeks. This animal model for maxillary sinus augmentation may improve our understanding of the bone formation procedure in humans and delineate how sinus air pressure caused by the occluded nasal ostium affects the quantity and fate of newly formed bone.
Asai
Sumito
S
Division of Oral Pathology, Tohoku University Graduate School of Dentistry, Sendai, Japan. sumito-a@fa2.so-net.ne.jp
Shimizu
Yoshinaka
Y
Ooya
Kiyoshi
K
D000399:Air Pressure; D000402:Airway Obstruction / Q000503:physiopathology*; D000540:Alveolar Ridge Augmentation / Q000379:methods*; D000818:Animals; D001284:Atrophy; D003238:Connective Tissue / Q000473:pathology; D005347:Fibroblasts / Q000473:pathology; D006097:Granulation Tissue / Q000473:pathology; D008297:Male; D008437:Maxilla / Q000601:surgery*; D008443:Maxillary Sinus / Q000473:pathology / Q000601:surgery*; D023421:Models, Animal; D009295:Nasal Bone / Q000601:surgery*; D009296:Nasal Cavity / Q000473:pathology; D010006:Osteoblasts / Q000473:pathology; D010012:Osteogenesis / Q000502:physiology*; D011817:Rabbits; D020545:Respiratory Mucosa / Q000473:pathology; D013927:Thrombosis / Q000473:pathology; D014945:Wound Healing / Q000502:physiology