Objective:This study was designed to compare treatment efficiency with conventionally-ligated brackets

and Da- mon3

TM

brackets.Methods:Twenty four consecutively finished cases treated by the author with Damon3TM brackets were com- pared with 24 matched cases treated by the author with conventional brackets.Parallel studies compare treatment outcome

treatment time and the chairside time required for ligature and ligature removal with these two bracket types.Resets:The PAR scores were observed comparatively in the pre and post-treatment

there were no statistically significant differences be- tween the two groups（P

>

0.05）.The results showed that patients treated with Damon3TM brackets pay significantly lower treat- ment time（4.23 months）

required significantly lower chairside time（137.15s）than those treated with conventionally-ligated brackets.Conclusions:In matched cases

Damon3TM brackets produced significant reductions in treatment time and the chair- side time

but gained the same treatment results comparing with conventionally-ligated brackets.