@article{YANG2017, 
author = {Jian-zhen YANG and Xiao-qing SHEN and Cheng-xia LIU and Ping-ping XU},
title = {The blocking effect and abrasion resistance of hydroxyapatite with different particle sizes and morphologies for dentinal tubules},
year = {2017},
journal = {Journal of Prevention and Treatment for Stomatological Diseases},
volume = {25},
number = {5},
pages = {288-293},
keywords = {Hydroxyapatite, Dentine hypersensitivity, Dentine tubules, Nano, Demineralization},
url = {https://www.sciopen.com/article/10.12016/j.issn.2096-1456.2017.05.003},
doi = {10.12016/j.issn.2096-1456.2017.05.003},
abstract = {ObjectiveTo study the blocking effect and abrasion resistance of hydroxyapatite (HA) with differentparticle sizes and morphologyies on dentinal tubules from the qualitative and quantitative aspects.MethodsDentindiscs were etched and divided into 4 groups randomly: 20 nm HA group; 30 nm HA group; 12 μm HA group; controlgroup (without any experimental treatment). Each group was brushed with correspondent materials for 7 days. Then, thedentin disk was divided into two parts, the one was detected by the scanning electron microscopy (SEM); the other wasobserved by SEM after toothbrush abrasion test. The Image-Pro Plus 6.0 image analysis software was used to calculatethe plugging rate of dentinal tubules.ResultsSEM showed that the blockage is granular, the plugging rate of the den-tinal tubules were about 82% to 96%. 30 nm HA group (short rod) range the first in the average plugging rate, followedby the 20 nm HA group (needles) and 12 μm HA group (spherical). After mechanical brushing for 7 days, SEM imagesshowed that deposited layer in each group was smooth and compact, and more than 63% of the tubules still had beenblocked.ConclusionHA with different particle sizes and morphologies had good plugging effect and abrasion resis-tance on dentine tubules. The blocking effect of HA was affected not only by particle size but also by the morphology.}
}