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Nikzad, S., Azari, A., Khodamoradi, N.. (1387). Shear Bond Strength of a Veneering Resin to a Ni-Cr Alloy Using Two Different Surface Treatment Methods. سامانه مدیریت نشریات علمی, 9(Supplement 2008), 35-40. doi: 10.30476/dentjods.2019.43616
S. Nikzad; A. Azari; N. Khodamoradi. "Shear Bond Strength of a Veneering Resin to a Ni-Cr Alloy Using Two Different Surface Treatment Methods". سامانه مدیریت نشریات علمی, 9, Supplement 2008, 1387, 35-40. doi: 10.30476/dentjods.2019.43616
Nikzad, S., Azari, A., Khodamoradi, N.. (1387). 'Shear Bond Strength of a Veneering Resin to a Ni-Cr Alloy Using Two Different Surface Treatment Methods', سامانه مدیریت نشریات علمی, 9(Supplement 2008), pp. 35-40. doi: 10.30476/dentjods.2019.43616
Nikzad, S., Azari, A., Khodamoradi, N.. Shear Bond Strength of a Veneering Resin to a Ni-Cr Alloy Using Two Different Surface Treatment Methods. سامانه مدیریت نشریات علمی, 1387; 9(Supplement 2008): 35-40. doi: 10.30476/dentjods.2019.43616

Shear Bond Strength of a Veneering Resin to a Ni-Cr Alloy Using Two Different Surface Treatment Methods

Journal of Dentistry
مقاله 7، دوره 9، Supplement 2008، دی 2008، صفحه 35-40    اصل مقاله (133.94 K)
نوع مقاله: Original Article
شناسه دیجیتال (DOI): 10.30476/dentjods.2019.43616
نویسندگان
S. Nikzad1؛ A. Azari* 2؛ N. Khodamoradi3
1Dept. of Fix Prosthodontics, School of Dentistry, Tehran University of Medical Science, Tehran, Iran
2Dept. of Removable Prosthodontics, School of Dentistry, Tehran University of Medical Science, Tehran, Iran
3Dentist, Iran
چکیده
Statement of Problems: A strong and stable bond between veneering materials and metal framework considerably promotes the aesthetic appearance and clinical longevity of a resin type restoration. Various adhesive metal primers have also been studied to enhance the bond strength of the composite resins to different metal surfaces.Purpose: The purpose of the present study was to evaluate the shear bond strength of one laboratory composite resin bonded to a Ni–Cr alloy by means of two different methods.Materials and Methods: In this study, 24 wax disks were cast and divided into two equal groups. In the first group, a metal primer was applied to the casting surface, while an opaque porcelain material was used for the second group. After application of the veneering composite resin to the treated surfaces, the specimens were stored in a 37ºC water bath for 15 days. At the end of this period, all the specimens were subjected to 1200 thermal cycles (5ºC and 55 OC) and then tested for shear strength in a universal testing machine at a crosshead speed of 0.5 mm/min. Fractured specimens were examined, using a scanning electron microscope.Results: The opaque porcelain group demonstrated higher bond strength (17.55±3.33 Mpa) in comparison to the metal primed surface (15±4.25 Mpa). However, no statistically significant difference was found between the specimens treated with metal primer and those treated with opaque porcelain. The two alloy surface treatments exhibited mixed failures, however. While the nature of failure for opaque porcelain was predominately cohesive, the failure for the metal primed group was adhesive.Conclusion: It can be concluded that both techniques have potential to significantly improve resin–alloy shear bond strength.
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