Randomization
After that, patients were randomly assigned to one of the three groups based on the mode of use of diode laser: group 1 (LLLT), group 2 (LAI), and group 3 (mock laser (ML)). The investigator created 18 envelopes containing concealed group codes to be assigned sequentially to the eligible patients. The operator opened the envelopes and recorded the codes with respective patient details on a computer to have adequate randomization using an equal proportion randomization allocation ratio.