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Comparison of the difference of the magnetic force by cast post-keepers combined with three different metals

Zhao, J.; Wei, B.; Li, Y.

Shanghai Kou Qiang Yi Xue 15(4): 431-433

2006

ISSN/ISBN: 1006-7248
PMID: 16955175
Document Number: 598348
Three different metals were used to make cast post-keepers of magnetic attachment. The magnetic force was tested and analyzed. The cast-post keepers were combined by gold alloy, Ni-Cr alloy and Ti metal respectively. 12 samples were divided into three groups, 4 in each. Root surface structures were manufactured by these samples. The values of the magnetic force of the magnetic attachment were tested and compared using ANOVA. The average value of the attractive force of the keeper combined by gold alloy was 4.84N, while that of the keeper combined by Ni-Cr alloy was 4.61N and the keeper combined by Ti was 4.12N. Significant difference was found between each two samples, P<0.01. The magnetic force of the keepers combined by three different metals decreased to certain degrees, the keeper combined by gold alloy decreased the least.

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