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KROM-KORALT ALAŞIMLARININ DÖKÜLEBİLİRLİĞİNE ERİTME VE DÖKÜM YÖNTEMLERİNİN ETKİSİ

EFFECT. OF THE MELTING AND CASTING METHODS ON CASTABILITY. OF CHROME-COBALT ALLOYS

Journal Name:

  • İstanbul Üniversitesi Diş Hekimliği Fakültesi Dergisi

Publication Year:

  • 1997

Key Words:

Keywords (Original Language):

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Abstract (2. Language): 
Chrome-cobalt alloys are often used in casting of cast partial dentures. However, casting of this type ofaUoys causes, in spite of advances in casting technology and developments of investments, some problems. In this study, three different chrome<obalt alloys (Wirocast, Wironit, Wironium) which are cast partial denture alloys, have been chosen for casting with different melting and casting methods (with acetylen-oxygen and induction heat so-urced melting and casting method). The effect of melting and casting methods on ike castability values were analyzed. Finally, it was observed that castability of Wirocast alloy was insufficient, castability of Wironit alloy was well and Wironium alloy was the best tn the melting and casting method of acetylen-oxygen heat source; the best castability values were found, for all three alloys, in the melting and casting method of induction heat source.
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Abstract (Original Language): 
İskelet protezlerin dökümlerinde krom-kobalt alaşımları sıklıkla kullanılmaktadır. Ancak bu alaşımların dökümlerinde, döküm teknolojisindeki ilerlemelere ve revetmanların gelişimine rağmen, birtakım sorunlar ortaya çıkmaktadır. Bu araştırma, iskelet protez döküm alaşımı olan üç farklı krom-kobalt alaşımının (Wrocat, Wironit, Wiro-ium'un), iki farklı eritme ve döküm yöntemiyle (aseti-len-oksijen ve indüksiyon ısı kaynaklı eritme ve döküm yöntemiyle) dökümleri yapılarak alaşımların bileşimlerinin eritme ve döküm yöntemlerinin dökülebilirlik değerleri üzerindeki etkisi araştırılmıştır. Sonuçta; asetilen-oksijen ısı kaynaklı eritme ve döküm yönteminde Wirocat alaşımının dökülebilirliğinin yetersiz, Wironit alaşımının iyi, Wironium alaşımının çok iyi olduğu görülmüş; İndüksiyon ısı kaynaklı eritme ve döküm yönteminde ise her üç alaşım için çok iyi dökülebilirlik değerleri bulunmuştur.
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REFERENCES

References: 

1.
Akso
y G, Örgev EK, Bıçakçı A. Farklı eritme yöntemlerinin yeni baz metal alaşımları ile bunlara değişik oranda artık karıştırılmış olanlarının dökülebilirlikleri üzerindeki etkilerinin karşılaştırılması. SÜDişhek. Fak. Derg. 1996: 6: 14-8.
2.
Asga
r K, Arfaei AH. Castability of crown and bridge al-\oys.JProsthet Dent 1985 : 54: 60-3.
3. Barreto MT, Goldberg AJ, Nitkin DA, Mumford G. Effect of investment on casting highfusion alloys./Prosthet Dent 1980: 44: 504-7.
4.
Bcyl
i MS, Nayır EH, Pamuk ES. Dişlıekimliğinde kullanılan değişik döküm yolluklan üzerine araştırmalar. İV Dişhek. Fak. Derg 1992: 26: 3-7.
5. Cohen SM, Vaidyanathan TK, Schulman A. The effect of limited beryllium additions on a Ni-Cr alloy./Prosthet Dent 1988: 60: 688-92.
6. Craig R. Restorative dental materials. 6th ed., Mosby Company, St. Louis, Toronto, London, 1980.
7. Dern WM, Hinman RW, Hesby RA, Pelku GB. Effect of a two-step ringlcss investment technique on alloy castability. 1985: 53: 874-6,
8. Dewald E. Tire relationship of pattern position on the
flow of gold and casting completeness. J Prosthet. Dent 1979: 41: 531-4.
9. Dharmar S, Rathnasamy Rj. Radiographic and mctal-lographic evaluation of porosity defects and grain structure of cast chromium cobalt removable partial dentures./iW hetDentl993: 69. 369-73.
10. Donovan TE, White LE. Evaluation of an improved centrifugal casting machine. J Prosthet Dent 1985:53: 609-12.
11. Dootz ER, Graig RG, Peyton FA. Influence of investments and duplicating procedures on the accuracy of panial denture castings. J/Yoi'tfte( Dent 1965:15: 679-90.
12. Firtcl DN, Muncheeryan AM, Green AT. Laboratory accuracy in casting removable partial denture frameworks J Prosthet Dent 1985: 54: 856-62.
13. Howard WS, Newman SM, Nunez LS. Castability of low gold centent alloys. J Dent Res 1980:59. 824-30.
14. Jarvis RH, Jenkins TJ, Tedesco LA. A Castability study of nonprecious ceramometal alloys. / Prosthet Dent 1984: 51: 490-4.
15. Lacy AM, Hora a, Boonsiri I. Incidence of bubbles on samples cast in a phosphate-bonded investment.//Yosi-hetDent 19850 54: 367-9.
Krom-Kobalt
Alaşımlarının Dahülebilirliğine Eritme ve Döküm Yöntemlerinin Etkisi
129
16. Marx
VH
. Über den einfluss des gussverfahrens auf die poren-und lunkerbildung. Dtsch Zahnarzt Z 1967: 10. 1228-35.
17. Meyer JM. Alliages precieux ou nickel-chrome pour ceramo,metallique. Rev Odontostomatol 1983: 12. 185-9.
18. Moffa JP, Lugassy AA, Guckes AD, Getdeman L. An evaluation of non-precious alloys for use with porcelain veneers. Part I. Physical properties./iYo^rf Dent 1973: 30 424¬31.
19. Moffa JP, Jenkins WA. Status report on base-metal crown and bridge alloys. J Am Dent Assoc 1974: 89. 652-5.
20. Nitkin D, Asgar K. An evaluation of alloys alternative to type II gold for use in fixed prosthodontics./ztm Dent Assoc 19760 93: 622-9.
21. Phillips RW. Skinner's Science of Dental Materials. 8th ed. Phil. WB Saunders Company, 1982.
22. Presswood RG. The castability of alloys for small castings./ Prostiiet Dent 1983: 5ft 36-9.
23. Rieger MR, Tanquist RA, Vainer S. The effect of a new sprue design on the castability of a base metal alloy./ Prosthet Dent 19860 55: 686-90.
24. Ritze VH. Grundsâtzliches zum einbett-und gussver-fahren. Dtsch Zahnarzll Z 1967:10. 1206-14.
25. Satoh Y, Toyoma H, Ohki K, Shiina Y, Maeda k. Studies on the castability of Co-Cr alloy for cast plate. Part I, J Nikon Univ Sch Dent 1989: 31: 397-407.
26. Satoh Y, Miyata M, Ono F, Ujiie Y, Toyoma H, Ohki K, Satoh N, Kimura R Shiina Y, Maeda R Studies on the castability of Co-Cr al loy for cast p la tes. Part 2, / Nihon Univ Sch Dent 1990: 32. 27-34.
27. Satoh Y, Ohyama T, Nagai E, Matsuzu M, Toyoma H, Ohwa M, Kobayashi E, Sakurai H, Ohki R Nishiyama M, Shiina Y, Maeda R Study on the castability of Co,Cr alloy for cast plates 3, / Nikon Univ Sek Dent 1993: 35: 49-56. 28. Satoh Y, Ohyama T, Itoh S, Sakurai H, Kobayashi E, Ohki
R Nishiyama M, Ikenati M, Shiina Y Study on the castability of Co-Cr alloy for cast plates. Part 4. /Nihon Univ Sell Deni 1994:36: 40-7.
29. Smith CD, Deckman J, Fairhurst CW. An alloy castability and adaptation test. / Dent Res 1980:5ft 349.
30.
Şenoca
k M. Temel Biyoistatİstik 1. baskı Çağlayan Kitabeyi, İstanbul. 1990.
31. Tangsgoolwatana J. Oda Y, Sumii T. The patte rn design for evaluation of castability of nickel-chromium alloys. Bull Tokyo Dent coll 1990: 31: 117-23.
32. Thomson DH. A study of the effect of an increased mold temperature on the casting ability of some nonprecio-us alloys for porcelain veneers. J Prostiiet Dent 1982:48: 52-8.
33. Tjan AHL, Dunn JR, Sanderson IR, Mikroleakage patterns of porcelain and castable ceramic laminate veneers. f Prosthet Dent 1982: 61: 276-82.
34. Valega TM. Alternatives to Gold Alloys in Dentistry. Conferans proceedings, U.S. Department of Healt, Education and Welfare, 1977.
35. Vincent PF, Stevens L, Basford KE. A comparison of the casting ability of precious and nonprecious alloys for porcelain veneering./ftwtfcetDent 1977: 37: 527-36.
36. Verrett RG, Duke ES. The effect o fsprue attachc-ment design on castability and porosity. J Prosthet Dent 1989: 61: 418-24.
37. Wight TA, Grisius RJ, Gaugler RW. Evaluation of three variables affecting the casting of base metal alloys./ Prosthet Dent 1980: 43: 415-8.
38. Wulfes WH. Flammenscmclzen und induktives schmelzen mit hochfrequenz in vergleich. DentLabor 1984: 8: 883-8.
39. Young HM, Coffey JP, Caswell CW. Sprue design and its effect on the castability of ceramomctal Moys. J Prosthet Dent 1987: 57: 160-4.

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