THE JOURNAL OF - Dentsply

Adhesive Luting Revisited: Influence of Adhesive,
Temporary Cement, Cavity Cleaning, and Curing Mode
on Internal Dentin Bond Strength
Roland Frankenberger a /Ulrich Lohbauer b /Michael Taschner c /Anselm Petschelt d /
Sergej A. Nikolaenko e
Purpose: To evaluate microtensile bond strength to Class I cavity floor dentin beneath adhesive inlays that were luted
with different adhesives, temporary cements, cleaning methods, and curing modes.
Materials and Methods: Occlusal cavities (4 x 4 mm, depth 3 mm) were prepared in 96 extracted human third molars.
One part of the cavities was temporized with different temporary cements, which were removed after one week
using three techniques (scaler or air polishing with Prophypearls or ClinPro powder). Direct resin composite inlays
(Clearfil AP-X) were then placed with the luting composite Calibra using three adhesives (XP BOND/SCA, Syntac, Opti-
Bond FL). Teeth were cut into beams and after 24 h of water storage at 37°C, the sticks were subjected to microtensile
bond strength evaluation. Samples were subjected to SEM fractographic analysis of failed interfaces.
Results: Contamination with temporary cement reduced dentin bond strengths (p < 0.05). Removing remnants of cements
with Prophypearls air polishing resulted in the lowest bond strengths (p < 0.05). Separate light curing of the adhesives
did not produce higher dentin bond strengths (p > 0.05). Syntac still worked when Heliobond was omitted (p >
0.05). Immediate dentin sealing prior to temporizing increased internal bond strength (p < 0.05).
Conclusion: The dual-cured adhesive provided higher internal bond strengths between adhesive inlays and dentin. Contamination
of dentin with temporary cements is a hazard for excellent dentin adhesion of adhesive inlays. Therefore, immediate
dentin sealing and resin coating is promising.
Keywords: etch-and-rinse, dentin bonding, adhesive inlays, microtensile bond strength.
J Adhes Dent 2007; 9: 269-273. Submitted for publication: 15.12.06; accepted for publication: 5.1.07.
a Associate Professor, Dental Clinic 1, Operative Dentistry and Periodontology,
University of Erlangen-Nuremberg, Erlangen, Germany.
b Assistant Professor, Dental Clinic 1, Operative Dentistry and Periodontology,
University of Erlangen-Nuremberg, Erlangen, Germany.
c Assistant Professor, Dental Clinic 1, Operative Dentistry and Periodontology,
University of Erlangen-Nuremberg, Erlangen, Germany.
d Professor and Chairman, Dental Clinic 1, Operative Dentistry and Periodontology,
University of Erlangen-Nuremberg, Erlangen, Germany.
e Professor and Head, Department of Operative Dentistry, Krasnojarsk State
Medical Academy, Krasnojarsk, Russia.
Paper presented at Satellite Symposium on Dental Adhesives, Dublin,
September 13th, 2006.
Reprint requests: Prof. Dr. Roland Frankenberger, Dental Clinic 1, Operative
Dentistry and Periodontology, University of Erlangen-Nuremberg, Glueckstrasse
11, D-91054 Erlangen, Germany. Tel: +49-9131-853-3693, Fax: +49-9131-853-
Adhesive inlays have proven to be durable in the oral cavity.
4,6,15,18,19,24,25,27,28 Clinical reports refer to bulk fractures
as the main failure reason for all ceramic inlay systems.
8-10,15,18,19,26 Clinical trials focusing on ceramic inlays
reveal a certain deterioration of marginal quality; 7 however,
when adhesive inlays are totally bonded to enamel and
dentin, internal dentin bond strength is also an interesting
factor for both stabilization and reduction of postoperative
hypersensitivity. 14,15,20
It is still not fully understood which mode of luting is most
reliable for bonding adhesive tooth-colored inlays to enamel
and dentin, but conventional etch-and-rinse systems with
dual-cured resin composites seem to be the gold standard
for luting. 1,15,18,20,16
Therefore, the aim of the present in vitro study was to evaluate
the performance of different etch-and-rinse adhesives
Vol 9, Supplement 2, 2007 269