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:: دوره 10، شماره 10 - ( سلامت دهان و جامعه نگر 1390 ) ::
جلد 10 شماره 10 صفحات 0-0 برگشت به فهرست نسخه ها
Durable bonding to mechanically and/or chemically pre-treated dental zirconia
چکیده:   (1701 مشاهده)

 Objectives

  To evaluate the effect of mechanical and chemical surface pre-treatment on the bond durability of two composite cements to dental zirconia.

 Methods

 Fully sintered IPS e.max ZirCAD (Ivoclar-Vivadent) blocks were either subjected to tribochemical silica sandblasting (CoJet, 3M ESPE) or not mechanically pre-treated. Next, the zirconia samples were either additionally pre-treated using one of two silane/MDP-combined ceramic primers (Clearfil Ceramic Primer, Kuraray Monobond Plus, Ivoclar-Vivadent), or not further chemically pre-treated. Finally, two identically pre-treated zirconia blocks were bonded together using either a conventional BisGMA-based (Clearfil Esthetic Cement, Kuraray) or an MDP-based (Panavia F2.0, Kuraray) ‘self-etch’ dual-cure composite cement. The specimens were trimmed at the interface to a cylindrical hour-glass shape and stored for 7 days in distilled water (37°C), after which they were randomly exposed to one of three ageing protocols: (1) immersed in 37°C water for 10 days (10d) (2) subjected to 10,000 thermo-cycles (TC) or (3) immersed in 37°C water for 6 months (6m). After storage, the micro-tensile bond strength (μTBS) was determined in MPa (n=15–21/group). Fractographic analysis was performed using SEM.

 Results

  Weibull analysis revealed the highest Weibull scale and shape parameters for the ‘CoJet/Clearfil Ceramic Primer/Panavia F2.0/10d’ combination. While the BisGMA-based composite cement Clearfil Esthetic Cement (Kuraray) bonded equally well to zirconia using either tribochemical silica sandblasting (CoJet, 3M ESPE) or not, sandblasting appeared indispensable for the MDP-based and more hydrophilic composite cement Panavia F2.0 (Kuraray).

 Conclusions

  Combined mechanical and chemical pre-treatment can best be recommended to durably bond to zirconia.

 Clinical significance

 As a standard procedure to durable bond zirconia to tooth tissue, both mechanical (tribochemical silica coating) and chemical (silane/MDP-combined ceramic primers) is clinically highly recommended.


 Source: Journal of Dentistry

 Full Text

واژه‌های کلیدی: Zirconia، Bond strength، Tribochemical silica sandblasting، Silane، Composite cement، Ageing
     
نوع مطالعه: پژوهشي | موضوع مقاله: سلامت دهان و جامعه نگر
دریافت: 1392/7/11 | انتشار: 1390/10/25
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Durable bonding to mechanically and/or chemically pre-treated dental zirconia. 1. 1390; 10 (10)

URL: http://idai.ir/article-1-2135-fa.html



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Creative Commons License این مقاله تحت شرایط Creative Commons Attribution-NonCommercial 4.0 International License قابل بازنشر است.
دوره 10، شماره 10 - ( سلامت دهان و جامعه نگر 1390 ) برگشت به فهرست نسخه ها
جامعه اسلامی دندانپزشکان Islamic Dental Association of IRAN

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