Release of Formaldehyde from Dental Composites

SAGE Publications - Tập 67 Số 10 - Trang 1289-1294 - 1988
Harry Øysæd1, I. Eystein Ruyter1, I.J. Sjøvik Kleven1
1NIOM-Scandinavian Institute of Dental Materials, Kirkevn. 71B, P.O. Box 70, N-1344 Haslum, Norway

Tóm tắt

Polymeric composite materials may contain releasable degradation products or unreacted constituents. Release of formaldehyde from nine different composites was investigated by means of HCHO-hydrazone derivative analyzed with high-performance liquid chromatography. Formation of formaldehyde was found in all the investigated materials. The highest concentrations were observed in specimens polymerized in contact with air. A correlation coefficient, r = 0.83, was found between released formaldehyde and the thickness of the unpolymerized surface inhibition layer. The formaldehyde concentrations were reduced when the inhibition layer was removed prior to testing. A continuous release of formaldehyde was evident during the first ten days. The release decreased with time, but was still detectable after 115 days.

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SAGE Publications

Tập 67 Số 10

1289-1294

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