Effect of 532 nm picosecond Nd∶YAG laser irradiation on temperature of the pulp chamber
10.3760/cma.j.issn.1673-4181.2016.01.008
- VernacularTitle:532nm掺钕钇铝石榴石皮秒激光照射离体牙对髓腔温度的影响
- Author:
Xingyue DING
;
Zhaohui ZOU
;
Xiaoxi DONG
;
Qianqian XIA
- Publication Type:Journal Article
- Keywords:
Picosecond laser;
Pulp chamber;
Temperature;
Safety
- From:
International Journal of Biomedical Engineering
2016;39(1):32-36
- CountryChina
- Language:Chinese
-
Abstract:
Objective To preliminarily select safe parameters for different forms of teeth by irradiating 532 nm picosecond Nd∶YAG laser on human isolated teeth with different irradiation time length and power.Methods Isolated human teeth including anterior teeth,premolars,molars were irradiated with 532 nm picosecond laser.Repeated measurements were made for each tooth by thermometer to measure the temperature of pulp chamber on different time point and power,and the temperature change (△T) was calculated.Results △T of the anterior irradiation group at 0.6 W,30 s;0.8 W,20 s and 30 s;1.0 W,10 s,20s and 30s were more than 5.6 ℃,which was the same with that of premolar group at 1.0 W,30s.△T of the molar group at 1.0 W,30 s was less than 5.6 ℃.Under certain power,the temperature of pulp chamber increased with the prolonging of irradiation time (P＜0.05).At a certain time,temperature increased with the power (P＜0.05).Conclusions It is safe to carry out operation on the parameters setting of 0.8 W,10 s and 0.6 W,20 s irradiation for anteriors teeth;0.4 W,30 s,0.8W,30 s and 1.0 W,20 s for premolar teeth,and 1 W,30 s for molar teeth.In the application of 532 nm picosecond laser,attention is required to be paid on parameter setting to control input power and irradiation time.
