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ph 4.3과 ph 7.0의 과포화용액에서 불소의 농도가 합성 수산화인회석의 결정 성장에 미치는 영향

Authors
 신한얼 ; 박성호 ; 이찬영 ; 박정원 
Citation
 Restorative Dentistry and Endodontics, Vol.37(1) : 16~23, 2012 
Journal Title
 Restorative Dentistry and Endodontics 
ISSN
 2234-7658 
Issue Date
2012
Abstract
Objectives Present study was undertaken to investigate the crystal growth onto synthetic hydroxyapatite (HA) seeds in pH 4.3 and pH 7.0 supersaturated solutions with different fluoride concentrations. Materials and Methods 8 groups of pH 4.3 and 7.0 calcium phosphate supersaturated solutions were prepared with different fluoride concentrations (0, 1, 2 and 4 ppm). Calcium phosphate precipitates yield crystal growth onto the HA seed surface while solutions flow. For evaluation of crystallizing process, the changes of Ca2+, PO43-, F- concentrations of the inlet and outlet solutions were determined. The recovered solid samples were weighed to assess the amount of minerals precipitated, and finally determined their composition to deduce characteristics of crystals. Results During the seeded crystal growth, there were significantly more consumption of Ca2+, PO43-, F- in pH 4.3 solutions than pH 7.0 (p < 0.05). As fluoride concentration increased in pH 4.3 solution, Ca2+, PO43-, F- consumption in experimental solutions, weight increment of HA seed, and fluoride ratio in crystallized samples were increased. There were significant differences among the groups (p < 0.05). But in pH 7.0 solution, these phenomena were not significant. In pH 7.0 solutions, analyses of crystallized samples showed higher Ca/P ratio in higher fluoride concentration. There were significant differences among the groups (p < 0.05). But in pH 4.3 solution, there were not significant differences in Ca/P ratio. Conclusions Crystal growth in pH 4.3 solutions was superior to that in pH 7.0 solutions. In pH 4.3 solutions, crystal growth increased with showed in higher fluoride concentration up to 4 ppm.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/91799
DOI
10.5395/rde.2012.37.1.16
Appears in Collections:
1. 연구논문 > 2. College of Dentistry > Dept. of Conservative Dentistry
Yonsei Authors
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