Three-year clinical evaluation of a flowable and a hybrid resin composite in non-carious cervical lesions.
OBJECTIVE
This randomized controlled clinical trial evaluated the 3-year clinical performance of a hybrid (Clearfil AP-X; AP) and a flowable (Clearfil Flow FX; FX) resin composite in 98 non-carious cervical lesions.


METHODS
Twenty-two patients, 11 males and 11 females (mean age: 61.9 years, range: 29-78 years) regularly visiting the Nagasaki University Hospital, participated in the study. Each patient received both materials randomly. All restorations (48 restorations for AP and 50 restorations for FX) were placed in conjunction with an all-in-one system (Clearfil S(3) Bond) by one dentist. The restorations were blindly evaluated by two examiners at baseline, 6 months, 1, 2 and 3 years using modified USPHS criteria. The data were statistically analyzed using the Cochran's Q-test and Fisher's exact test.


RESULTS
All the patients were examined at each recall. However, five restorations could not be evaluated at 3-year recall as two teeth had been extracted and three restorations had been lost. The only minor problem was the integrity of the enamel margin. The incidence and extent of marginal staining increased with time, but it was still superficial. Marginal staining occurred adjacent to 11 restorations for AP and 12 restorations for FX after 3 years. Neither lesion size nor depth had influence on marginal staining adjacent to each type of resin composite. There were no significant differences in the clinical performances between AP and FX for each variable.


CONCLUSIONS
Under the protocol used in this study, both types of resin composite in conjunction with S(3) Bond demonstrated an acceptable clinical performance up to 3 years.
Kubo
Shisei
S
Center for Clinical Education and Training, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8588, Japan. kubo@nagasaki-u.ac.jp
Yokota
Hiroaki
H
Yokota
Haruka
H
Hayashi
Yoshihiko
Y
D000328:Adult; D000368:Aged; D016009:Chi-Square Distribution; D003188:Composite Resins / Q000737:chemistry*; D018772:Dental Marginal Adaptation; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000379:methods*; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents; D005260:Female; D006801:Humans; D008297:Male; D008689:Methacrylates; D008875:Middle Aged; D011109:Polymethacrylic Acids; D019279:Resin Cements; D019237:Tooth Cervix; D057085:Tooth Wear / Q000628:therapy*
C112828:Clearfil AP-X; C501417:Clearfil Flow FX; C505694:Clearfil S3 Bond; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D011109:Polymethacrylic Acids; D019279:Resin Cements