Calcium phosphate cement for root end sealing was obtained by mixing α-tricalcium phosphate and additives with an aqueous solution of citric. Powder and liquid were mixed at a ratio of 1.25g/mL. The biocompatibility of this material was investigated primarily by subcutaneous implantation tests. Then calcium phosphate cement was used to fill three adult dogs' root canal, both calcium hydroxide paste and hydroxyapatite paste as control. The animals were killed at 4,12,20 weeks postoperatively respectively. The effects of different materials on the apical closure, restoration of periapical tissues and adaptability to the dentinal surface were examined by optical and electronic microscope. The observation at 20 weeks shows that the calcium phosphate cement has the potentialities of being a root canal sealer filling material available for pulpless teeth with open-apex and destructive periapical tissue.
参考文献
| [1] | Dickens-Venz SH;Takagi S;Chow LC et al.Physical and Chemical Properties of Resin-reinforced Calcium Phosphate Cements[J].Dental Materials,1994,10(03):100-106. |
| [2] | Miyazaki K;Horibe T;Antonucci JM et al.Polymeric Calcium Phosphate Cements: Analysis of Reaction Products and Properties[J].Dental Materials,1993,9(01):41-48. |
| [3] | Chow LC;Takagi S;Sugawara A et al.X-ray Diffraction and Electron Microscopic Characterization of Calcium Phosphate Cement Setting Reaction[J].Journal of Dental Research,1987,66:190-197. |
| [4] | Fukase Y;Eanes ED;Takagi S et al.Setting Reactions and Compressive Strengths of Calcium Phosphate Cement[J].Journal of Dental Research,1990,69(12):1852. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%