THE JOURNAL OF - Dentsply

Six-month Clinical Evaluation of XP BOND in Noncarious
Cervical Lesions
Uwe Blunck a /Katharina Knitter b /Klaus-Roland Jahn c
Purpose: To evaluate the 6-month clinical performance of the etch-and-rinse one-bottle adhesive system XP BOND,
used in combination with the composite resin CeramX Duo for the restoration of Class V noncarious cervical lesions
(NCCL).
Materials and Methods: XP BOND was tested in a total of 40 patients who received two Class V CeramX Duo restorations,
Adper Scotchbond 1 XT was used as a control. After cleaning the teeth, the surface of the NCCL was treated
using a carbide bur in dentin and a 40-μm diamond bur in enamel with no retentive preparations. The lesions were
filled with two increments of CeramX Duo after the application of the respective adhesive by a single operator according
to manufacturer’s instructions. After 6 months, the retention and the marginal integrity were evaluated.
Results: Thirty-eight of 40 patients were evaluated after 6 months by two clinicians according to modified USPHS criteria,
and all restorations using XP BOND were still in place. In the control group (using Adper Scotchbond 1XT), one
restoration was lost. The statistical evaluation (chi 2 test) showed no significant differences in any of the criteria. No
difference of marginal integrity was found between the two adhesive systems.
Conclusion: XP BOND meets the ADA success criteria after 6 months.
Keywords: clinical study, noncarious cervical lesions, Class V restorations, adhesive systems.
J Adhes Dent 2007; 9:265-268. Submitted for publication: 15.12.06x; accepted for publication: 3.1.07.
In operative dentistry, etch-and-rinse systems form an important
group of bonding agents that are clinically widely
used. However, as these systems require the demineralization
of dentin and the exposure of the embedded collagen
network, numerous concerns regarding drying of the protein
mesh arise. 5,6,8 This is due to the need to rinse and carefully
a Associate Professor, Charité-Universitätsmedizin Berlin, Dental School, Campus
Virchow Clinic, Berlin, Germany.
b Assistant Professor, Charité-Universitätsmedizin Berlin, Dental School, Campus
Virchow Clinic, Berlin, Germany.
c Professor, Charité-Universitätsmedizin Berlin, Dental School, Campus Virchow
Clinic, Berlin, Germany.
Paper presented at Satellite Symposium on Dental Adhesives, Dublin,
September 13th, 2006.
Reprint requests: Dr. Uwe Blunck, Charité-Universitätsmedizin Berlin, Dental
School, Campus Virchow Clinic, Augustenburger Platz 1, 13353 Berlin, Germany.
Tel: +49-30-450-562-673, Fax: +49-30-450-562-961. e-mail:
uwe.blunck@charite.de
dry the surface after acid etching, in order to enable the constituents
of the bonding system, specifically the uncured
monomers, to penetrate the outer layers of the prepared
dentin. It has therefore been proposed that a bonding system
capable of penetrating dry and collapsed demineralized
dentin would improve bonding, resulting in better clinical
performance. 8
XP BOND is a new one-bottle etch-and-rinse adhesive,
composed of a pre-mixed solution of monomers dissolved in
tert-butanol. Due to an improved ability to diffuse through
partially collapsed demineralized dentin, it is claimed to be
less technique sensitive. 2
As for any other new dental restorative, data from clinical
investigations are crucial to assess the effectiveness and reliability
of the product before being launched. This is needed
in order to validate results from the in vitro studies. As
generally accepted for investigating the clinical effectiveness
of such adhesive systems, noncarious Class V restorations
are the standard test. 9,13 This is due to the fact that
they do not provide any macromechanical retention, they require
at least 50% bonding to dentin, and they are widely
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