Abstract : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep
The objective of this study was to compare the healing of the augmented sinus at which the antrostomy was covered with a membrane or the repositioned bone plate.
Eight sheep underwent bilateral maxillary sinus floor augmentation. The control site was covered with a resorbable membrane, while at the experimental site the bone plate was repositioned, and both were secured with cyanoacrylate. Animals were euthanised after 4 months and histomorphometric analysis was performed.
A large amount of the graft appeared to be partially interpenetrated by the newly formed bone. Statistical analysis demonstrated different percentages of the new bone and bone interpenetrated to the graft between test and control site in the close-to-window area respectively 22.1 ± 12.6 vs 7.5 ± 4.5 (P = 0.028) and 66.1 ± 14.7 vs 44.2 ± 15.1 (P = 0.046). Other areas showed no difference in the bone and graft amount. More bone was found at the edges of the antrostomy in the experimental site, without statistical significance. In the centre of the antrostomy, the replaced bony window appeared bonded to the newly formed bone. No remnants and no biological response to cyanoacrylate were observed.
The repositioning of the bony window after sinus floor elevation in sheep led to a larger amount of newly formed bone in the close-to-window zone of the grafted area. The bony window appeared partially bonded to the new bone. Newly formed bone was found interpenetrating the graft granules.
Serial posts:
- Abstract : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep
- Introduction : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [1]
- Introduction : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [2]
- Materials and methods : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [1]
- Materials and methods : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [2]
- Materials and methods : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [3]
- Materials and methods : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [4]
- Results : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [1]
- Results : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [2]
- Discussion : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [1]
- Discussion : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [2]
- Discussion : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [3]
- Conclusion : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep
- Availability of data and materials : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep
- Abbreviations : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep
- References : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [1]
- References : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [2]
- References : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [3]
- References : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [4]
- Acknowledgements : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep
- Funding : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep
- Author information : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [1]
- Author information : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep [2]
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- About this article : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep
- Table 1 Percentages of the various tissues within the elevated area after 4 months of healing. Mean values ± standard deviations (P values) and median (25%; 75% percentiles) : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep
- Table 2 Percentages of various tissues in the antrostomy area after 4 months of healing. Mean values ± standard deviations (P values) and median (25%; 75% percentiles) : Bone plate repositioned over the antrostomy after sinus floor elevation: an experimental study in sheep
- Fig. 1. Clinical view at a membrane site. a Skin and periosteum were separately elevated, and the facial sinus wall exposed. b A 12 × 8-mm window was cut and removed. c The Schneiderian membrane was carefully elevated. d A twisted wire was inserted in the middle of the long side of the window and the elevated sinus was grafted. e At the control site, a resorbable membrane was placed and secured with cyanoacrylate. f Membrane in situ : Bone plate repositioned over the antrostomy after
- Fig. 2. Clinical view at a bone plate site. a The bone window was removed. b The sinus mucosa was carefully elevated, and a twisted wire was placed. c The elevated sinus was grafted. d The access bony window was repositioned and secured with cyanoacrylate : Bone plate repositioned over the antrostomy after
- Fig. 3. a The elevated area was divided into four regions for morphometric analysis. RED: submucosa; GREEN: middle; YELLOW: base; PURPLE: close-to-window. INC: top of the infraorbital nerve canal : Bone plate repositioned over the antrostomy after
- Fig. 4. Photomicrographs of ground sections after 4 months of healing. a Bone formed from the base of the sinus. b Bone plate connected by bridges of the new bone to the close-to-window region. c Particle of the graft surrounded by new bone. d Overexposed image to show the new bone ingrowth within the granules of biomaterial : Bone plate repositioned over the antrostomy after
- Fig. 5. Graph representing the tissue percentages within the elevated area. No statistically significant differences were found : Bone plate repositioned over the antrostomy after
- Fig. 6. Graph representing new bone and composite bone percentages within the elevated area : Bone plate repositioned over the antrostomy after