Penetration of ions from silicate cement restorations into Copalite®- covered cavity walls
作者:
TwitAnne Bjørg,
HalsEinar,
期刊:
Acta Odontologica Scandinavica
(Taylor Available online 1978)
卷期:
Volume 36,
issue 1
页码: 15-24
ISSN:0001-6357
年代: 1978
DOI:10.3109/00016357809026362
出版商: Taylor&Francis
关键词: Filling material;varnish;fluoride
数据来源: Taylor
摘要:
Tveit, A.B.&Hals, E. Penetration of ions from silicate cement restorations into Copalite©-covered cavity walls.Acta Odont. Scand. 36, 15–24This study aimed to assess the effect of silicate cement on Copalite®-covered cavity walls in extracted human teeth. Class V cavities were prepared in 24 premolars and filled with silicate cement (Bio-Trey®). Four cavities were unlined, the rest of the cavities were lined with 1 or 2 layers of Copalite before insertion of the restorations. After 6 months, 70-100μm thick longitudinal sections of the teeth were studied by polarized light microscopy, microradiography and electron probe microanalysis. When imbibed in water or quinoline, a subsurface zone of altered birefringence was noticed in nearly all cavity walls. Nearly half of the cavit walls in the experimental groups showed a surface zone of increased radiopacity. In a few instances a subsurface radiolucent zone was present. By electron probe microanalysis F (0,4-3% by weight), Zn (14%) and Al (0,2-6%) were measured in the outer 10–60μm of the cavity walls. The study shows that even with a double layer of Copalite, known to prevent microleakage, a desirable uptake of F and A1 from silicate restorations into cavity walls can take place. Copalite does not prevent a phosphoric acid effect on the cavity walls.
点击下载:
PDF (1029KB)
返 回