Mechanical properties of experimental dental composites containing a combination of mesoporous and nonporous spherical silica as fillers.
OBJECTIVE
Mesoporous fillers have been investigated for use in dental composites because of their potential for creating micromechanical filler/resin matrix interphase bonding. Such a micromechanical bonding could eliminate the need for the silane treatment of fillers for interfacial chemical bonding that is prone to hydrolysis in the oral environment. In the case of micromechanical bonding, dental polymer chains are threaded mechanically (like a "necklace") through nanosized channels in the fillers.


METHODS
A combination of mesoporous silica, which was synthesized using the non-surfactant templating method, and nonporous spherical silica (500nm) was used to prepare experimental dental composites. The porous silica used in this study contained interconnected pores and channels as opposed to porous fillers containing surface pores. The compressive strength, compressive modulus, flexural modulus, and flexural strength of these composites were evaluated.


RESULTS
The results showed that composites containing a combination of mesoporous and nonporous fillers have better mechanical properties than the composites having either of these fillers alone.


CONCLUSIONS
The results showed that a combination of mesoporous and nonporous materials can be used to prepare stronger dental materials that may resist hydrolysis and wear.
Samuel
Solomon Praveen
SP
Department of Chemistry, Drexel University, Philadelphia, PA 19104, USA.
Li
Shuxi
S
Mukherjee
Indraneil
I
Guo
Yi
Y
Patel
Alpa C
AC
Baran
George
G
Wei
Yen
Y
D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D055598:Chemical Phenomena; D003188:Composite Resins / Q000737:chemistry*; D019245:Compressive Strength; D003764:Dental Materials / Q000737:chemistry*; D055119:Elastic Modulus; D000431:Ethanol / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D010316:Particle Size; D018583:Pliability; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D016062:Porosity; D019163:Reducing Agents / Q000737:chemistry; D012821:Silanes / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013729:Terpenes / Q000737:chemistry
D003188:Composite Resins; D003764:Dental Materials; D008689:Methacrylates; D011109:Polymethacrylic Acids; D019163:Reducing Agents; D012821:Silanes; C469658:Solitaire 2 composite resin; C113049:Solitaire composite resin; D012997:Solvents; D013729:Terpenes; C020946:triethylene glycol dimethacrylate; C017492:methacryloxypropyltrimethoxysilane; D000431:Ethanol; D011092:Polyethylene Glycols; C040733:tetraethoxysilane; D017438:Bisphenol A-Glycidyl Methacrylate; C048339:camphoroquinone; D012822:Silicon Dioxide; C049840:2-(dimethylamino)ethyl methacrylate