Temporary restorative resins using non-phthalate ester plasticizers.
OBJECTIVE
This study examined temporary restorative resins that use non-phthalate ester plasticizers.


METHODS
Three non-phthalate plasticizers were tested: tri-ethyl citrate (TEC), tri-butyl citrate (TBC), and di-butyl sebacate (DBS). The experimental resins were compared with resins that use a phthalate ester plasticizer (di-butyl phthalate, DBP) and commercial products (Dura Seal, Plast Seal, and Fit Seal). For the experimental resins, the ratio of plasticizer to PMMA/MMA resin was varied from 30 to 60% (wt). The mechanical properties of the experimental resins were evaluated using a modified diametral compressive strength and the resistance to explorer insertion.


RESULTS
The strengths of the experimental resins with plasticizer concentrations ranging from 40 to 50% (TEC, TBC, and DBP) or from 30 to 40% (DBS), by weight, were equivalent to the strengths of commercial temporary restorative resins. A similar tendency was seen for the resistance to explorer insertion.


CONCLUSIONS
The results suggest that new temporary restorative resins can be prepared by choosing the appropriate proportions of resin monomer and non-phthalate ester plasticizer.
Tanaka
N
N
Department of Operative Dentistry, Graduate School of Biomedical Science, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.
Nomura
Y
Y
Nishikiori
R
R
Shibata
S
S
Shirai
K
K
Fujitani
M
M
D002951:Citrates / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D019245:Compressive Strength; D003794:Dental Restoration, Temporary / Q000379:methods*; D003993:Dibutyl Phthalate / Q000737:chemistry; D003998:Dicarboxylic Acids / Q000737:chemistry; D004548:Elasticity; D004952:Esters / Q000737:chemistry; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D020366:Methylmethacrylate / Q000737:chemistry*; D015394:Molecular Structure; D010968:Plasticizers / Q000737:chemistry*; D012117:Resins, Synthetic / Q000737:chemistry
D002951:Citrates; D003188:Composite Resins; D003998:Dicarboxylic Acids; D004952:Esters; C504505:Fit Seal composite resin; D008689:Methacrylates; C102650:Plast Seal; D010968:Plasticizers; D012117:Resins, Synthetic; D020366:Methylmethacrylate; D003993:Dibutyl Phthalate; C055481:dibutyl sebacate; C030189:Dura-Seal; C039783:tributyl citrate; C023001:ethyl citrate