[Comparison of different means for tooth surface polishing after bracket debonding].
OBJECTIVE
To observe the tooth surface after acid etching and removing of bonding adhesive by two means for polishing.


METHODS
Thirty extracted premolars for orthodontic purpose were used in this experiment. The brackets were adhered and debonded. Then the premolars were randomly divided into two groups. They were treated by traditional method and silicone particles, and observed by roughness instrument and scanning electronic microscope. The polishing-time and surface roughness value(Ra) were recorded. SPSS13.0 software package was used for paired t test.


RESULTS
There was no significant difference in Ra and polishing-time between the two groups (P>0.05). Under SEM, the scratches on tooth surface polished by silicone particles were shallower and thinner.


CONCLUSIONS
The silicone particles could provide good requirement for tooth polishing after bracket debonding clinically.
Chen
Li
L
Department of Orthodontics, Shanghai Stomatological Disease Centre, Shanghai, China. chli09132000@yahoo.com.cn
Zhao
Bing-Jiao
BJ
Zhang
Ju-Ju
JJ
D001641:Bicuspid; D017005:Dental Debonding; D003743:Dental Enamel; D016910:Orthodontic Brackets; D012828:Silicones
D012828:Silicones