Incomplete polymerization of Cavalite with the use of recommended photopolymerization times: a warning of possible cytotoxic effects.
As part of a study of the suitability of new materials for use as a retrofilling material, we examined the polymerization properties of Cavalite, a light-cured, hydroxyapatite and glass ionomer-containing cavity liner. By varying the time of photopolymerization, it was found that polymerization for 20 to 30 seconds according to the manufacturer's recommendations is not sufficient to ensure complete polymerization. The implications of this incomplete polymerization are discussed in terms of possible cytotoxic effects on tissues exposed to unpolymerized Cavalite, both when used in retrofilling situations and as a deep cavity liner.
Helseth
D L
DL
Department of Oral Biology, Northwestern University Dental School, Chicago, Ill.
Tolwin
T M
TM
Kaminski
E J
EJ
Osetek
E M
EM
D000180:Acrylic Resins / Q000633:toxicity; D001672:Biocompatible Materials / Q000633:toxicity; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D006882:Hydroxyapatites / Q000633:toxicity; D008027:Light; D011108:Polymers; D012387:Root Canal Filling Materials / Q000633:toxicity; D012822:Silicon Dioxide / Q000633:toxicity; D013997:Time Factors
D000180:Acrylic Resins; D001672:Biocompatible Materials; D006882:Hydroxyapatites; D011108:Polymers; D012387:Root Canal Filling Materials; D012822:Silicon Dioxide; C061123:Cavalite