title: Leaching of additives and degradation products from cold-cured orthodontic resins.
abstract: Unstimulated saliva was collected from orthodontic patients and subjected to combined gas-chromatography and gas-chromatography/mass-spectrometry analyses. Saliva was collected before insertion of removable orthodontic appliances made of cold-cured resins. Saliva was then collected 1-2 months after insertion of the appliances and 1 week after they had been removed. Phenyl benzoate (PB) and phenyl salicylate (PS) were identified in pooled saliva samples from patients wearing the appliances. Biphenyl and 2-methoxy-4-hydroxy-benzophenone in addition to PB and PS were identified in a study with in vitro specimens made of orthodontic resin. The leaching of compounds from these test specimens processed by a powdering technique and a pre-mix technique was compared.
authors.affiliation: Department of Dental Biomaterials, School of Dentistry, University of Bergen, Norway.
authors.forename: H
authors.initials: H
authors.lastname: Lygre
authors.forename: K N
authors.initials: KN
authors.lastname: Klepp
authors.forename: E
authors.initials: E
authors.lastname: Solheim
authors.forename: N R
authors.initials: NR
authors.lastname: Gjerdet
mesh_terms: D001713:Biphenyl Compounds / Q000032:analysis; D002648:Child; D002849:Chromatography, Gas; D002851:Chromatography, High Pressure Liquid; D004058:Diffusion; D000431:Ethanol; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D007552:Isotonic Solutions; D008297:Male; D008855:Microscopy, Electron, Scanning; D009967:Orthodontic Appliances; D012117:Resins, Synthetic / Q000032:analysis* / Q000737:chemistry; D000077331:Ringer's Solution; D012459:Salicylates / Q000032:analysis; D012463:Saliva / Q000737:chemistry*; D013499:Surface Properties; D013997:Time Factors
chemical_list: D001713:Biphenyl Compounds; D007552:Isotonic Solutions; D012117:Resins, Synthetic; D012459:Salicylates; C026041:phenyl salicylate; D000431:Ethanol; D000077331:Ringer's Solution; C035132:4-phenylbenzoic acid