Effect of filler loading on resin cement bonding to silanized buildup composites.
OBJECTIVE
To determine the effects of silanation for core buildup composites on bond strength of resin cement.


METHODS
Three core buildup composites including FluoroCore LV, Core Restore, and Clearfil Photo Core, of which filler loadings were 65 wt%, 74 wt%, and 83 wt% respectively, were used. All composite specimens were randomly divided into four surface treatment groups of eight each as following; 1) 600-grit ground only, 2) 600-grit ground plus silanation, 3) 600-grit ground plus air-particle abrasion, 4) air-particle abrasion plus silanation. Following these treatments, 4-META/MMA-TBB resin (C&B Metabond) was bonded to the specimen surfaces. Completed specimens were stored in 37 degree C water for 24 hours, and then thermocycled 20,000 times (4 degree C - 60 degree C) before shear bond strengths were tested. Data were analyzed by two-way ANOVA and Scheffé's test for statistical significance (P < 0.05).


RESULTS
Clearfil Photo Core, of which filler loading was the highest among the resin composites tested, treated with air-particle abrasion plus silanation obtained the highest bond strength. However, silanation alone was not effective for improving the bond strength.
Department of Fixed Prosthodontics, Kagoshima University Dental School, 8-35-1 Sakuragaoka, Kagoshima-shi, Kagoshima 890-8544, Japan. kajihiro@dentb.hal.kagoshima-u.ac.jp
Hirotada
H
Kajihara
Shiro
S
Suzuki
Yoshito
Y
Minesaki
Hisanori
H
Kurashige
Takuo
T
Tanaka
D020906:Air Abrasion, Dental; D000538:Aluminum Silicates / Q000737:chemistry; D017609:Barium Compounds / Q000737:chemistry; D001896:Boron Compounds / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry; D003775:Dental Polishing; D005460:Fluorides, Topical / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008768:Methylmethacrylates / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength; D012821:Silanes / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013997:Time Factors; D014867:Water / Q000737:chemistry
D000538:Aluminum Silicates; D017609:Barium Compounds; D001896:Boron Compounds; C469237:Clearfil Core; D003188:Composite Resins; C439272:CoreRestore; D003738:Dental Cements; D003764:Dental Materials; D005460:Fluorides, Topical; C074316:FluoroCore; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; D012821:Silanes; C102738:barium glass filler; D014867:Water; D012822:Silicon Dioxide; C049495:Super-bond