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Surface Roughness of Two Dıfferent Non-Precıous Dental Alloys

Year 2016, Volume: 43 Issue: 1 - Volume: 43 Issue: 1, 31 - 36, 01.02.2016

Abstract

Introduction: Surface properties of dental materials are of clinical importance since they may affect oral hygiene by reason of plaque accumulation. Especially in the case of all-cast or metal-to-acrylic veneer restorations, smoothness of the metal surfaces become more important because large metal areas make contact with the oral tissues. The aim of this study was to compare two different non- precious dental alloys investigating their surface roughnesses. Materials and Methods: Ni-Cr Wirolloy®, NB, Bego, Bremen, Germany and Co-Cr Wirobond® 280, Bego, Bremen, Germany alloys suitable for all-cast restorations and crowns veneered with acrylic restorations were investigated in this study. Disc shaped 1.5 mm in thickness and 10 mm in diameter 10 samples were cast from each alloy. Finishing and polishing procedures were performed until obtaining clinically acceptable surfaces in accordance with the recommendations of the manufacturer. Then each sample was ultrasonically cleaned and dried at 60C for 24 hours. Surface roughness measurements were performed by a profilometer MAHR- Perthometer M1 . Each measurement was repeated five times and the mean arithmetic roughness values Ra obtained. The data for surface roughness were analyzed using ANOVA α = 0.05 . Results: The surface roughnesses of Co- Cr alloy samples 0.289 µm were approximately 3 times greater than those of Ni- Cr alloy samples 0.096 µm . The differences in the means were also found statistically significant  = 0.05 . Conclusion: Overall Ra values ranged from 0.089 to 0.1026 µm for Ni- Cr alloy samples and from 0.27 to 0.3422 µm for Co- Cr alloy samples. The roughness of the Co- Cr samples tested indicates that there is a possibility for plaque accumulation, since the threshold value of 0.2 µm is considered that no further bacterial adherence can be expected below this value.

References

  • Powers JM, Sakaguchi RL (2006) Craig’s restorative dental materials, 12th edn. Elsevier, St. Louis, pp 386–410.
  • Wataha JC (2002) Alloys for prosthodon- tic restorations. J Prosthet Dent 87:35–363.
  • McGinley EM, Coleman DC, Moran GP, Flemin GCP.Effects of surface finishing conditions on the biocompatibility of a nickel–chromium dental casting alloy. Dent Mater 2011; 27: 637-650.
  • Wylie CM, Shelton RM, Fleming GJP, Davenport AJ. Corrosion of nickel-based dental casting alloys. Dent Mater 2007;23:714–23.
  • Wataha JC, Lockwood PE, Schedle A. Ef- fect of silver, copper, mercury, and nickel ions on cellular proliferation during ex- tended, low-dose exposure. J Biomed Ma- ter Res 2000;52:360–4.
  • Huang TH, Ding SJ, Min Y, Kao CT. Met- al ion release from new and recycled stain- less steel brackets. Eur J Orthod 2004;26:171–7.
  • Lin HY, Bowers B, Wolan JT, Cai Z, Bumgardner JD. Metallurgical, surface, and corrosion analysis of Ni–Cr dental casting alloys before and after porcelain firing. Dent Mater 2008;24:378–85.
  • Wylie CM, Shelton RM, Fleming GJP, Davenport AJ. Corrosion of nickel-based dental casting alloys. Dent Mater 2007;23:714–23.
  • Wataha JC, O’Dell NL, Singh BB, Ghazi M, Whitford GM, Lockwood PE. Relating nickel-induced tissue inflammationto nick- el release in vivo. J Biomed Mater Res B: Appl Biomat 2001;58:537–44.
  • Kunt GE, Güler AU, Ceylan G, Duran İ, Özkan P, Kirtiloğlu T.Effects of Er:YAG laser treatments on surface roughness of base metal alloys. Lasers Med Sci 2012; 27: 47-51. 11. Mohsen CA.
  • The Effect of Bleaching Agents on the Surface Topography of Ceramometal Dental Alloys. J Proshodont 2010; 19: 33-41.
  • Clayton JA, Green E. Roughness of pontic materials and dental plaque. J Prosthet Dent 1970;23:407-11.
  • Bedi A, Michalakis KX, Hirayama H, Stark PC. The effect of different invest- ment techniques on the surface roughness and irregularities of gold palladium alloy castings. J Prosthet Dent 2008;99:282-86.
  • Roach MD, Wolan JT, Parsell DE, Bum- gardner JD. Use of x-ray photoelectron spectroscopy and cyclic polarization to evaluate the corrosion behaviour of six nickel–chromium alloys before and after porcelain-fused-to-metal firing. J Prosthet Dent 2000;84:623–34.

İKİ FARKLI KIYMETSİZ METAL ALAŞIMIN YÜZEY PÜRÜZLÜLÜĞÜNÜN KARŞILAŞTIRILMASI

Year 2016, Volume: 43 Issue: 1 - Volume: 43 Issue: 1, 31 - 36, 01.02.2016

Abstract

Giriş: Dental materyallerin yüzey özellikleri mikrobiyal dental plak birikimini doğrudan etkilemektedir ve bu nedenle dental materyallerin yüzey özellikleri oral hijyen ile doğrudan ilişkilidir. Özellikle tam metal kron ve porselen veneer kron restorasyonlarında oral dokularla ilişkili metal yüzeylerin genişliği fazla olduğundan metal yüzeylerin pürüzsüzlüğü önem kazanır. Bu çalışmanın amacı; iki farklı kıymetsiz metal alaşımın yüzey pürüzlülüğünün karşılaştırılmasıdır. Gereç ve Yöntem: Bu çalışmada döküm yoluyla elde edilen tüm restorasyonlarda ve porselen veneer kron restorasyonlarında, metal destekli porselen kron-köprü restorasyonlarında kullanılabilen Ni-Cr Wirolloy®, NB, Bego, Bremen, Almanya ve Co-Cr Wirobond® 280, Bego, Bremen, Almanya alaşımlar kullanılmıştır. Her grup için 10 adet disk şeklinde 1.5 mm kalınlığında ve 10 mm çapında örnekler hazırlanmıştır. Üretici firmaların önerilerine göre klinik açıdan kabul edilebilir yüzeyler oluşturulana kadar bitirme ve cilalama işlemleri uygulanmıştır. Elde edilen örnekler ultrasonik olarak temizlenerek 24 saat boyunca 60 ºC de kurutulmuştur. Yüzey pürüzlülüğü ölçümleri profilometre cihazı Perthometer M1, Mahr GmbH, Göttingen, Almanya kullanılarak gerçekleştirilmiştir. Her bir örneğin 5 ayrı bölgesinden ölçüm gerçekleştirilmiş ve her bir örneğin ortalama Ra Roughness Average değeri belirlenmiştir. Elde edilen verilerin istatistiksel analizi varyans analiz testi ANOVA kullanılarak yapılmıştır. Bulgular: Co-Cr alaşımından 0,289 m elde edilen örneklerin yüzey pürüzlülüğü ortalama değerleri yaklaşık olarak Ni-Cr alaşımından 0,096 m elde edilen örneklerin ortalama değerlerinin 3 katı kadardır. Ortalama değerler arasındaki fark istatistiksel olarak anlamlı bulunmuştur = 0,05 . Sonuç: Elde edilen sonuçlara göre Ra değerleri Ni-Cr alaşım örnekleri için 0.089-0.1026 µm aralığında, Co-Cr alaşım örnekleri için ise 0.270.3422 µm aralığında bulunmuştur. Co-Cr örneklerin pürüzlülük değerleri plak tutulumuna izin verebilmektedir. 0.2 µm bakteriyel tutulum için eşik değer olarak kabul edilmektedir ve bu değerin altında bakteriyel tutulum beklenmemektedir

References

  • Powers JM, Sakaguchi RL (2006) Craig’s restorative dental materials, 12th edn. Elsevier, St. Louis, pp 386–410.
  • Wataha JC (2002) Alloys for prosthodon- tic restorations. J Prosthet Dent 87:35–363.
  • McGinley EM, Coleman DC, Moran GP, Flemin GCP.Effects of surface finishing conditions on the biocompatibility of a nickel–chromium dental casting alloy. Dent Mater 2011; 27: 637-650.
  • Wylie CM, Shelton RM, Fleming GJP, Davenport AJ. Corrosion of nickel-based dental casting alloys. Dent Mater 2007;23:714–23.
  • Wataha JC, Lockwood PE, Schedle A. Ef- fect of silver, copper, mercury, and nickel ions on cellular proliferation during ex- tended, low-dose exposure. J Biomed Ma- ter Res 2000;52:360–4.
  • Huang TH, Ding SJ, Min Y, Kao CT. Met- al ion release from new and recycled stain- less steel brackets. Eur J Orthod 2004;26:171–7.
  • Lin HY, Bowers B, Wolan JT, Cai Z, Bumgardner JD. Metallurgical, surface, and corrosion analysis of Ni–Cr dental casting alloys before and after porcelain firing. Dent Mater 2008;24:378–85.
  • Wylie CM, Shelton RM, Fleming GJP, Davenport AJ. Corrosion of nickel-based dental casting alloys. Dent Mater 2007;23:714–23.
  • Wataha JC, O’Dell NL, Singh BB, Ghazi M, Whitford GM, Lockwood PE. Relating nickel-induced tissue inflammationto nick- el release in vivo. J Biomed Mater Res B: Appl Biomat 2001;58:537–44.
  • Kunt GE, Güler AU, Ceylan G, Duran İ, Özkan P, Kirtiloğlu T.Effects of Er:YAG laser treatments on surface roughness of base metal alloys. Lasers Med Sci 2012; 27: 47-51. 11. Mohsen CA.
  • The Effect of Bleaching Agents on the Surface Topography of Ceramometal Dental Alloys. J Proshodont 2010; 19: 33-41.
  • Clayton JA, Green E. Roughness of pontic materials and dental plaque. J Prosthet Dent 1970;23:407-11.
  • Bedi A, Michalakis KX, Hirayama H, Stark PC. The effect of different invest- ment techniques on the surface roughness and irregularities of gold palladium alloy castings. J Prosthet Dent 2008;99:282-86.
  • Roach MD, Wolan JT, Parsell DE, Bum- gardner JD. Use of x-ray photoelectron spectroscopy and cyclic polarization to evaluate the corrosion behaviour of six nickel–chromium alloys before and after porcelain-fused-to-metal firing. J Prosthet Dent 2000;84:623–34.
There are 14 citations in total.

Details

Primary Language Turkish
Journal Section Research Article
Authors

Burcu Batak This is me

Evşen Tamam This is me

Fehmi Gönüldaş This is me

Caner Öztürk This is me

Publication Date February 1, 2016
Published in Issue Year 2016 Volume: 43 Issue: 1 - Volume: 43 Issue: 1

Cite

Vancouver Batak B, Tamam E, Gönüldaş F, Öztürk C. İKİ FARKLI KIYMETSİZ METAL ALAŞIMIN YÜZEY PÜRÜZLÜLÜĞÜNÜN KARŞILAŞTIRILMASI. EADS. 2016;43(1):31-6.