Effects of barriers on chemical and biological properties of two dual resin cements.
The aim of this study was to investigate the degree of conversion, monomer release, and cytotoxicity of two dual-cure resin cements (Cement-One and SmartCem2), light-cured across two indirect restorative materials in an attempt to simulate in vitro the clinical conditions. The results obtained show that the degree of conversion was influenced by both barriers, but the effect of the composite material was greater than that of the ceramic one. The amount of monomers released from the polymerized materials in the absence of barriers was significantly lower than that released in the presence of either the ceramic or the composite barrier. However, a higher amount of monomers was released in the presence of the ceramic barrier. All materials, in all the experimental conditions employed, induced slight cytotoxicity (5-10%) on human pulp cells. Our examinations showed that the two resin cements had similar chemical and biological properties. The decreased degree of conversion of the dual-curing self-adhesive composite showed that the light-curing component of these materials has an important role in the polymerization process. In clinical practice, it is therefore important to pay attention to the thickness of the material used for the reconstruction.
Facoltà di Medicina e Chirurgia, Istituto di Biochimica e Biochimica Clinica, Università Cattolica del Sacro Cuore, Rome, Italy; Istituto di Chimica del Riconoscimento Molecolare, C.N.R., Rome, Italy.
Giuseppina
G
Nocca
Andrea
A
Iori
Carlo
C
Rossini
Giuseppe E
GE
Martorana
Gabriele
G
Ciasca
Alessandro
A
Arcovito
Massimo
M
Cordaro
Alessandro
A
Lupi
Luca
L
Marigo
D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002478:Cells, Cultured; D002516:Ceramics / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry; D003782:Dental Pulp / Q000166:cytology / Q000187:drug effects; D006801:Humans; D055115:Light-Curing of Dental Adhesives / Q000379:methods; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D058105:Polymerization; D011109:Polymethacrylic Acids / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry* / Q000633:toxicity; D055116:Self-Curing of Dental Resins / Q000379:methods*; D013053:Spectrophotometry / Q000295:instrumentation; D013499:Surface Properties
C520091:CeramX; D003188:Composite Resins; D003764:Dental Materials; D008689:Methacrylates; D011109:Polymethacrylic Acids; D011140:Polyurethanes; D019279:Resin Cements; C029824:urethane dimethacrylate luting resin; C020946:triethylene glycol dimethacrylate; D011092:Polyethylene Glycols; C074277:ethoxylated bis-phenol A dimethacrylate; D017438:Bisphenol A-Glycidyl Methacrylate
conversion degree; cytotoxicity; monomers leachability