Effect of the curing cycle on residual monomer levels of acrylic resin denture base polymers.
It has been shown previously that high levels of residual monomer have a deleterious effect on the properties of denture base polymers. Levels of residual monomer were determined on a homopolymer and a copolymer using gas-liquid chromatography. A wide range of recommended and 'short cut' curing cycles were then investigated which produced values ranging from 0.56 to 18.46%. From the ranges examined an optimum cycle of 7 h at 70 degrees C and 1 h at 100 degrees C was established which was used to polymerize 23 currently available synthetic denture base polymers. Only small differences were found between the materials tested with a range from 0.54 to 1.08% of residual monomer.
Harrison
A
A
Department of Prosthetic Dentistry and Dental Care of the Elderly, Dental School, Bristol, UK.
Huggett
R
R
D000180:Acrylic Resins / Q000032:analysis / Q000737:chemistry*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002849:Chromatography, Gas; D003819:Denture Bases; D008422:Materials Testing; D020366:Methylmethacrylate; D008768:Methylmethacrylates / Q000032:analysis; D011108:Polymers / Q000032:analysis / Q000737:chemistry; D015203:Reproducibility of Results; D013997:Time Factors
D000180:Acrylic Resins; D008768:Methylmethacrylates; D011108:Polymers; D020366:Methylmethacrylate