question: Compared to CMD and aPDT with activation by ultrasonics. what was the result of Chemomechanical debridement (CMD) or CMD and passive ultrasonic irrigation (CMD + PUI) or  CMD and antimicrobial photodynamic therapy (aPDT) on bacterial reduction?
context: The differences in bacterial reduction between the groups were not statistically significant, and all the protocols were almost equally effective in elimination of bacteria