Effect of curing mode on the micro-mechanical properties of dual-cured self-adhesive resin cements

Effect of curing mode on the micro-mechanical properties of dual-cured self-adhesive resin cements

  • نوع فایل : کتاب
  • زبان : انگلیسی
  • مؤلف : Nicoleta Ilie & Alexander Simon
  • چاپ و سال / کشور: 2011

Description

Light supplying to luting resin cements is impeded in several clinical situations, causing us to question whether materials can properly be cured to achieve adequately (or adequate) mechanical properties. The aim of this study was therefore to analyse the effect of light on the micro-mechanical properties of eight popular dual-cured self-adhesive resin cements by comparing them with two conventional, also dual-cured, resin cements. Four different curing procedures were applied: auto-polymerisation (dark curing) and light curing (LED unit, Freelight 2, 20 s) by applying the unit directly on the samples’ surface, at a distance of 5 and 10 mm. Twenty minutes after curing, the samples were stored for 1 week at 37°C in a water-saturated atmosphere. The micro-mechanical properties–Vickers hardness, modulus of elasticity, creep and elastic/plastic deformation–were measured. Data were analysed with multivariate ANOVA followed by Tukey’s test and partial eta-squared statistics (p<0.05). A very strong influence of the material as well as filler volume and weight on the micro-mechanical properties was measured, whereas the influence of the curing procedure and type of cement– conventional or self-adhesive–was generally low. The influence of light on the polymerisation process was material dependent, with four different behaviour patterns to be distinguished. As a material category, significantly higher micro-mechanical properties were measured for the conventional compared to the self-adhesive resin cements, although this difference was low. Within the self-adhesive resin cements group, the variation in micro-mechanical properties was high. The selection of suitable resin cements should be done by considering, besides its adhesive properties, its micro-mechanical properties and curing behaviour also.
Clin Oral Invest DOI 10.1007/s00784-011-0527-x Received: 20 October 2010 / Accepted: 15 February 2011
اگر شما نسبت به این اثر یا عنوان محق هستید، لطفا از طریق "بخش تماس با ما" با ما تماس بگیرید و برای اطلاعات بیشتر، صفحه قوانین و مقررات را مطالعه نمایید.

دیدگاه کاربران


لطفا در این قسمت فقط نظر شخصی در مورد این عنوان را وارد نمایید و در صورتیکه مشکلی با دانلود یا استفاده از این فایل دارید در صفحه کاربری تیکت ثبت کنید.

بارگزاری