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Qualitative analysis on crystal growth of synthetic hydroxyapatite influenced by fluoride concentration

 Kang, Sumi  ;  Seo, Jeong Taeg  ;  Park, Sung-Ho  ;  Jung, Il Young  ;  Lee, Chan Young  ;  Park, Jeong-Won 
 ARCHIVES OF ORAL BIOLOGY, Vol.104 : 52-59, 2019 
Journal Title
Issue Date
Crystal growth ; Fluoride ; Synthetic hydroxyapatite
OBJECTIVE: This study was designed to analyze the crystal growth of synthetic hydroxyapatite (HA) particles in pH 7.0 supersaturated solutions with different fluoride concentrations by FE-SEM, FE-TEM, X-ray diffraction (XRD), and FTIR.

DESIGN: Eight groups of pH 7.0 calcium phosphate supersaturated solutions were prepared with different fluoride concentrations (0, 1, 2, 4, 8, 16, 32, and 64 ppm). Each solution was introduced into the reactive column containing the synthetic HA for 48 h. The resulting products were prepared for FE-SEM, FE-TEM, XRD, and FTIR.

RESULTS: The FE-SEM examination revealed various morphological changes of the crystals, with additional, less-ordered crystallites in experimental solutions containing more than 8 ppm of fluoride. FE-TEM examination showed an additional amorphous layer on the surface of the crystals with the presence of fluoride, whereas definite lattice structures completely reached the surface of the crystals without fluorides. XRD data showed that all crystals had the same patterns as the unreacted synthetic HA, regardless of fluoride concentration. With FTIR results, the intensity of the OH-libration mode decreased when adding fluoride, compared to that of pristine HA. The resulting crystals were considered to be partially fluoridated HA under room temperature and pH 7.0 supersaturated solutions.

CONCLUSION: Under the experimental conditions in this study, fluorides mainly react with the surface of the seed HA and have an impact on the growth of HA in a less effective manner as the concentration of fluoride increases.
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Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Dental Education (치의학교육학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Conservative Dentistry (보존과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Oral Biology (구강생물학교실) > 1. Journal Papers
Yonsei Authors
Kang, Sumi(강수미) ORCID logo https://orcid.org/0000-0002-4682-6540
Park, Sung Ho(박성호) ORCID logo https://orcid.org/0000-0003-2171-235X
Park, Jeong Won(박정원) ORCID logo https://orcid.org/0000-0002-2517-8150
Seo, Jeong Taeg(서정택) ORCID logo https://orcid.org/0000-0003-2697-0251
Lee, Chan Young(이찬영)
Jung, Il Young(정일영) ORCID logo https://orcid.org/0000-0001-8972-2664
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