The blocking effect and abrasion resistance of hydroxyapatite with different particle sizes and morphologies for dentinal tubules
10.12016/j.issn.2096-1456.2017.05.003
- VernacularTitle:不同粒径和形貌的羟基磷灰石对牙本质小管的堵塞作用及耐磨性研究
- Author:
YANG Jian-zhen
1
;
SHEN Xiao-qing
2
;
LIU Cheng-xia
1
;
XU Ping-ping
1
Author Information
1. Department of Endodontics, Stomatological Hospital of Southern Medical University (Guangdong Provincial Stomatological Hospital)
2. Department of Stomatology, Zhujiang Hospital Southern Medical University
- Publication Type:Journal Article
- Keywords:
Hydroxyapatite;
Dentine hypersensitivity;
Dentine tubules;
Nano;
Demineralization
- From:
Journal of Prevention and Treatment for Stomatological Diseases
2017;25(5):288-293
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the blocking effect and abrasion resistance of hydroxyapatite (HA) with different particle sizes and morphologyies on dentinal tubules from the qualitative and quantitative aspects.
Methods : Dentin discs were etched and divided into 4 groups randomly: 20 nm HA group; 30 nm HA group; 12 μm HA group; control group (without any experimental treatment). Each group was brushed with correspondent materials for 7 days. Then, the dentin disk was divided into two parts, the one was detected by the scanning electron microscopy (SEM); the other was observed by SEM after toothbrush abrasion test. The Image-Pro Plus 6.0 image analysis software was used to calculate the plugging rate of dentinal tubules.
Results :SEM showed that the blockage is granular, the plugging rate of the dentinal tubules were about 82% to 96%. 30 nm HA group (short rod) range the first in the average plugging rate, followed by the 20 nm HA group (needles) and 12 μm HA group (spherical). After mechanical brushing for 7 days, SEM images showed that deposited layer in each group was smooth and compact, and more than 63% of the tubules still had been blocked.
Conclusion :HA with different particle sizes and morphologies had good plugging effect and abrasion resistance on dentine tubules. The blocking effect of HA was affected not only by particle size but also by the morphology.
- Full text:不同粒径和形貌的羟基磷灰石对牙本质小管的堵塞作用及耐磨性研究 (1).pdf
