The extent of slits at the interfaces between luting cements and enamel, dentin and alloy
作者:
ØiloGudbrand,
期刊:
Acta Odontologica Scandinavica
(Taylor Available online 1978)
卷期:
Volume 36,
issue 5-6
页码: 257-261
ISSN:0001-6357
年代: 1978
DOI:10.3109/00016357809029074
出版商: Taylor&Francis
关键词: Dental materials;fixed partial prosthesis;adhesion
数据来源: Taylor
摘要:
Øilo, G. The extent of slits at the interfaces between luting cements and enamel, dentin and alloy.Four different cements were used to assess the presence of slits at the cement/tooth or the cement/alloy interfaces using a tooth-crown model. The model consisted of ground sections of teeth and plane plates of silver/palladium alloy. The plates were fixed with bolts between two brass plates and with three different dimensions of the cement film between tooth and alloy, i.e. 50μm, 100μm and 200μm. The tooth-alloy specimens were sectioned and the adaption of cements was studied with an indirect technique (replica) in a scanning electron microscope. The extent of slits was expressed as the length of all slits relative to the total length of the interface in each specimen.The results showed that the zinc phosphate cement and poly carboxylate cement exhibited a slight to moderate tendency to formation of slits at the interfaces. The EBA cement had a small extent of slits adjacent to thin cement films, but more slits were observed with increasing film thickness. The composite resin cement had a marked tendency to slit formation independent of the cement film thickness.
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