[Clinical effect of 3 polishing methods on resin composite restoration in filling wedge-shaped defect].
OBJECTIVE
To evaluate the clinical effect of 3 polishing methods on resin composite restoration in filling wedge-shaped defect.


METHODS
One hundred and fifty patients with wedge-shaped defects were randomly divided into 3 groups. After being filled with Nano composite resin(FILTEK Z350,3M), restorations in group 1 were polished with Sof-lex discs system, restorations in group 2 were polished with Super-snap system and group 3 with diamond bur and rubber cup. Restorations in each group were reexamined and assessed utilizing standards of USPH&Ryge after 0.5, 1 and 2 a. Chi-square test was performed using SPSS17.0 software package.


RESULTS
No significant difference of secondary decay, marginal adaption, marginal staining, surface roughness, colour matching, wearing and gingival condition among 3 groups was found after 0.5 a and 1 a. Restorations in group 1 and group 2 showed better performance with regards to secondary decay, marginal adaption, marginal staining, wearing and color matching than group 3 after 2 years of restoration.


CONCLUSIONS
Sof-lex discs and Super-snap polishing system after composite filling of wedge-shaped defect was effective in reducing secondary decay, marginal staining and wearing, as well as in maintaining the marginal adaption, which is worthy of wide clinical application.
Department of Stomatology, Qingpu Branch of Zhongshan Hospital, Fudan University. Shanghai 201700, China. E-mail:rqking315@163.com.
Qiang
Q
Ren
Yi
Y
Wang
Kui-Jie
KJ
Wei
D003116:Color; D003188:Composite Resins; D003775:Dental Polishing / Q000379:methods*; D003793:Dental Restoration, Permanent; D006801:Humans; D013499:Surface Properties
D003188:Composite Resins; C533204:filtek Z350