ROENTGENOLOGICAL DETECTION OF CASTING DEFECTS IN COBALT-CHROMIUM ALLOY FRAMEWORKS

被引：11

作者：

WICTORIN, L

JULIN, P

MOLLERSTEN, L

机构：

[1] KAROLINSKA INST,SCH DENT,DEPT ODONTOL ROENTGENOL,S-14104 HUDDINGE 4,SWEDEN

[2] KAROLINSKA INST,DEPT ODONTOL TECHNOL,HUDDINGE,SWEDEN

来源：

JOURNAL OF ORAL REHABILITATION | 1979年 / 6卷 / 02期

关键词：

D O I：

10.1111/j.1365-2842.1979.tb01273.x

中图分类号：

R78 [口腔科学];

学科分类号：

1003 [口腔医学];

摘要：

A method for non‐destructive X‐ray investigation of casting defects in cobalt‐chromium prosthetic frameworks has been developed and tested. The attenuation properties of a cobalt‐chromium alloy were studied. A dental X‐ray machine with a tube voltage working at 70 kVp and a focus‐film distance of 45–50 cm on dental ultraspeed film made it possible to detect defects representing 10% or less of the thickness of cobalt‐chromium details with dimensions between 0.6 and 3.0 mm. The frequency and site of internal defects in sixty‐six frameworks were investigated. Of the sixty‐six frameworks only two were without roentgenologically visible defects. In the other sixty‐four frameworks 294 pores or cracks were recorded. The defects were mostly situated in the saddles. Porosities occurred in 53% of the saddlebar regions. The results confirmed the need for a non‐destructive routine test of prosthetic frameworks. Copyright © 1979, Wiley Blackwell. All rights reserved

引用

页码：137 / 146

页数：10