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Quintessence Publishing: Journals: JAD

 

The Journal of Adhesive Dentistry

Edited by Jean-François Roulet

ISSN (print) 1461-5185 • ISSN (online) 1757-9988

Publication:

Winter 2002
Volume 4 , Issue 4



Pages: 299-308
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Resin/Resin Bonding: A New Adhesive Technology

Janda, Ralf/Roulet, Jean-François/ Wulf, Michael/Tiller, Hans-Jürgen

Evaluation of a new surface treatment method to obtain a good bond strength between a luting composite and (1) a light-cured, (2) a heat-cured and (3) a thermoplastic resin. Specimens were prepared and tests conducted according to ISO 10477, Amend. 1. The surfaces of Targis (light cured), SR Isosit (heat cured), and Dental D (thermoplastic) were ground under water cooling with 400-grit grinding paper, polished with 800-grit paper and air dried. Each resin material was divided into 3 groups of 10 specimens each. Group 1 was flame treated with a PyrosilPen for 5 s/2 cm2, group 2 for 10 s/2 cm2, and group 3 for 20 s/2 cm2. Subsequently, a methacryl silane was applied, followed by a luting composite. Prior to measuring shear bond strength, the specimens were thermocycled 5000 times in a water bath between 5°C and 55°C. SEM, FTIR investigations, and fracture analysis were also done. Etched and silanized Empress II - the gold standard - was used as a control. The following shear bond strengths were found: treatment time 5 s/2 cm2, Targis 25 (12) MPa, SR Isosit 17 (11) MPa; treatment time 10 s/2 cm2, Targis 23 (12) MPa, SR Isosit 26 (8) MPa; treatment time 20 s/2 cm2, Targis 29 (5) MPa, SR Isosit 26 (9) MPa. All Dental D specimens failed completely so that shear bond strength could not be measured. The control achieved 27 (6) MPa. No significant differences were found between the materials or the flaming times. On all flamed surfaces, Si was detected by FTIR. SEM showed that no heat destruction occurred at a flaming time of 5 s/2 cm2, a slight change at 10 s/2 cm2, and a significant change at 20 s/2 cm2. This new bonding technology is an effective method for surface-treating polymerized composite resin materials to obtain good bonding to luting composites. The method fails on thermoplastic resins.

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