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镍铬合金重铸对其孔隙率的影响。

Effect of recasting of nickel-chromium alloy on its porosity.

作者信息

Palaskar Jayant, Nadgir D V, Shah Ila

机构信息

Department of Prosthodontics, Sinhgad Dental College and Hospital, Pune-400 041, Maharashtra, India.

出版信息

Contemp Clin Dent. 2010 Oct;1(4):237-42. doi: 10.4103/0976-237X.76391.

DOI:10.4103/0976-237X.76391
PMID:22114428
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3220144/
Abstract

STATEMENT OF PROBLEM

As per the review of literature very few studies have been carried on recasting of dental casting alloy and in particlular its effect on occurrence of porosities.

PURPOSE OF STUDY

This study was designed to find out occurrence of porosities in new alloy and recasted alloy using a scanning electron microscope.

MATERIALS AND METHODS

Different percentage combinations of new and once casted alloy were used to produce twenty five samples. Castings obtained from new alloy were used as control group. All the samples were scanned under scanning electron mocroscope and photographs were taken from three specific sites for comparison.

RESULTS

There is no significant difference in occurrence of porosities in casting obtained by using new alloy and recasted alloy.

CONCLUSION

With in the limitations of the study it is conducted that the prorosities will not be affected by recasting of neckel-chromium alloy.

CLINICAL IMPLICATION

Porosities in dental casting alloy can alter physical and mechanical properties of the mental which inturn may lead to failure of crown and bridge, and also cast partial denture prosthesis.

摘要

问题陈述

根据文献综述，对牙科铸造合金重铸的研究很少，尤其是其对气孔形成的影响。

研究目的

本研究旨在使用扫描电子显微镜找出新合金和重铸合金中气孔的出现情况。

材料与方法

使用新合金和一次铸造合金的不同百分比组合制作25个样本。从新合金获得的铸件用作对照组。所有样本在扫描电子显微镜下进行扫描，并从三个特定部位拍摄照片以作比较。

结果

使用新合金和重铸合金获得的铸件中气孔出现情况没有显著差异。

结论

在本研究的局限性范围内，得出镍铬合金重铸不会影响气孔的结论。

临床意义

牙科铸造合金中的气孔会改变金属的物理和机械性能，进而可能导致冠桥以及铸造局部义齿修复体的失败。

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