Comparative study regarding the compressive strength of 4th generation adhesive systems and universal adhesives
| Autor: | Ştefan George Călinoiu, Cornelia Bîcleşanu, Mihai Eftimie, Anamaria Florescu, Alexandru Burcea |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Romanian Journal of Stomatology, Vol 66, Iss 2, Pp 83-91 (2020) |
| Druh dokumentu: | article |
| ISSN: | 1843-0805 2069-6078 |
| DOI: | 10.37897/RJS.2020.2.5 |
| Popis: | The aim of this study is to compare the compressive strength of the 4th generation adhesive systems, considered as "golden standard", with the latest generation of adhesive systems, also called universal. Material and method. The study was performed on a batch of 20 pill form molded blocks of composite resin (Gradia® Direct Posterior, GC) and ormocer (Admira Fusion, VOCO GmbH). The materials were cast in cylindrical molds of 15 mm diameter and 2 mm uniform thickness. The cast samples were divided into 2 groups of 10 pills each. In order to establish the compressive strength, the samples were tested using a hydraulic press. After testing, the samples which broke in less than 4 pieces were restored to their original shape (15 mm diameter and 2 mm thickness) by bonding with Clearfil ™ Universal Bond Quick Kuraray and All-Bond 3® - Bisco Dental adhesive. Thus, 4 groups of 5 samples resulted: Group A-5 samples of composite resin Gradia® Direct Posterior, GC bonded with Bisco All-Bond 3® adhesive; Group B -5 samples of composite resin Gradia® Direct Posterior, GC bonded with Universal Bond Quick adhesive; Group C - 5 samples of ormocer Admira Fusion, VOCO GmbH bonded with Bisco All-Bond 3® adhesive; Group D - 5 samples of ormocer Admira Fusion, VOCO GmbH bonded with Universal Bond Quick adhesive. The bonded samples were retested in terms of compressive strength by means of the previously used press. Results and discussions. It was noted that compressive strength of the composite resin is 56.9 MPa and compressive strength of the ormocer is 47.9 MPa. The average value of compressive strength of the samples to which Bisco All-Bond 3® was used for adhesion is 55.2 MPa in group A and 46.8 MPa in group C. Thus, the bonding qualities of the 4th generation All-Bond 3® Bisco adhesive system stand out. In groups A and B, where composite resin was used, Bisco All-Bond 3® adhesive was found to have a maximum strength of 58 MPa, while Clearfil ™ Universal Bond Quick Kuraray adhesive had 54 MPa, resulted averages being about 9% higher. In groups C and D where ormocer was used, it was found that Bisco All-Bond 3® adhesive also has higher strength values. Conclusions. After testing and regardless of the composite resin used, Bisco All-Bond 3® adhesive system showed higher adhesion and compressive strength than universal adhesives Clearfil ™ Universal Bond Quick Kuraray. |
| Databáze: | Directory of Open Access Journals |
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