20
Participants
Start Date
January 1, 2024
Primary Completion Date
February 20, 2024
Study Completion Date
February 21, 2024
Er,Cr:YSGG laser irradiation
irradiation with a 2780 nm, 1.0 W Er,Cr:YSGG laser for 1 minute
Sham Laser irradiation
sham laser irradiation for 1 minute
Lidocaine
2% lidocaine gel
Vaseline
Vaseline
the First Affiliated Hospital of Jinan University, Guangzhou
Li Zhen Zhong
OTHER