In vitro study of dentin hypersensitivity treated with Nd:YAG laser
10.7652/jdyxb201502025
- VernacularTitle:Nd:YAG 激光作用下牙本质脱敏机制的研究
- Author:
Xueying LI
;
Min LIN
;
Cong CONG
;
Rui TENG
;
Xiaohong LI
;
Lin NIU
- Publication Type:Journal Article
- Keywords:
dentin sensitivity;
Nd:YAG laser;
dentin tubule;
Ca-P ratio;
scanning electron microscopy (SEM)
- From:
Journal of Xi'an Jiaotong University(Medical Sciences)
2015;(2):275-279
- CountryChina
- Language:Chinese
-
Abstract:
ABSTRACT:Objective To observe the structural changes of dentin irradiated with Nd:YAG laser under dif-ferent parameters and the changes of calcium-phosphorus ration,and evaluate the optimal parameters of Nd:YAG laser in treating dentin hypersensitivity (DH).Methods The model of dentin hypersensitivity was established by acid etching method.Samples were irradiated with Nd:YAG laser under different parameters.The morphological alterations of the dentin surfaces and Ca-P ratio were examined with scanning electron microscopy (SEM)combined with energy dispersive X-ray microanalysis.Results Compared with those in the control group,dentinal tubules could be blocked partially or totally with no cracks in A-C (30 mj,5 Hz),(30 mj,10 Hz)and (50 mj,5 Hz)groups. Dentinal tubules could be entirely blocked but with cracks in D (50 mj,10 Hz)and E (80 mj,5 Hz)groups.Dentin was carbonized in F (80 mj,10 Hz)group.Compared with that in the control group,Ca-P ratio was decreased sig-nificantly (P <0.05).Conclusion The suitable energy parameter of Nd:YAG laser in treating dentin hypersensi-tivity is (30 mj,10 Hz)and (50 mj,5 Hz).
