Regeneration of a Micro-Scratched Tooth Enamel Layer by Nanoscale Hydroxyapatite Solution

Bulletin of the Korean chemical society

Fangfang Sun¹  Kwangnak Koh¹  Jaebeom Lee¹  Byoung Ki Lim¹  Su Chak Ryu¹  Dong Wook Han¹ 

关键词: Hydroxyapatite (HAp);    Human tooth;    Regeneration;    Ca2+ ion;    PO43- ion;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Hydroxyapatite (HAp)-based materials have attracted considerable attention on account of their excellent stability and recrystallization. Nanoscale HAp powders with a mean particle size of 200 nm were used to regenerate the enamel layers of damaged teeth. An artificially scratched tooth was immersed in a nanoscale HAp powder suspension in d.i. water (HAp of 70 wt%) at 37 oC for a period of 1~3 months. SEM and AFM showed that the scratched surface was ultimately inlaid with HAp after three months and the roughness increased from 2.80 to 5.51. Moreover, the hardness of the neo-generated HAp layer on the crown was similar to that of the innate layer. Ca2+ and PO43- ions from the HAp powders dissolved in d.i. water were precipitated on the tooth to produce cemented pastes on the enamel surface due to its high recrystallizing characteristics, resulting in a hard neo-regenerated HAp layer on the enamel layer. This nanoscale HAp powder solution might be used to heal decayed teeth as well as to develop tooth whitening appliances.

【 授权许可】

Unknown