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Journal of Dental Materials and Techniques، جلد ۱، شماره ۲، صفحات ۵۳-۵۷
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی The Effect of Bridge Orientation in Casting Machine on the Castability and Quality of Base Metal Castings
چکیده انگلیسی مقاله Introduction: The aim of this study was to evaluate the effect of bridge orientation in casting machine on castability and quality of base metal castings. Methods: Three groups of patterns with different direction and lengths in casting machine were casted and then studied qualitatively and quantitatively using mean and standard deviation in table of frequency. Results: Larger nodules and porosities were on the joints of sprue in horizontal specimens (P=0.01 and 0.048, respectively). There was no significant difference in castability between 3-, 5- and 6-unit bridges in relation to their direction in casting machine (P=0.5). An increase in bridge length led to more variation in length and width. The position of bridges also played an important role in the length variation in bridges. Conclusion: The direction of bridges had no effect on base metal castability but a vertical position resulted in a better casting quality and an increase in length of the bridges caused more defects in castings.
کلیدواژه‌های انگلیسی مقاله base metal, casting machine, dental casting technique
نویسندگان مقاله اعظم السادات مدنی | azamsadat madani
dental research center, faculty of dentistry, mashhad university of medical sciences, mashhad, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (Mashhad university of medical sciences)

احمد قهرمانلو | ahmad ghahremanlu
dental material research center, faculty of dentistry, mashhad university of medical sciences, mashhad, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (Mashhad university of medical sciences)

محمدرضا صابونی | mohammad reza sabooni
dental research center, faculty of dentistry, mashhad university of medical sciences, mashhad, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (Mashhad university of medical sciences)

فواد شهابیان | foad shahabian
department of prosthodontics, faculty of dentistry, mashhad university of medical sciences, mashhad, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (Mashhad university of medical sciences)

حمزه هراتی | hamzeh harati
dentist, neyshaboor, iran
نشانی اینترنتی http://jdmt.mums.ac.ir/article_94.html
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زبان مقاله منتشر شده en
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