Effectiveness of a new one-step self-etch adhesive in the restoration of non-carious cervical lesions: 2-year results of a randomized controlled practice-based study.
OBJECTIVE
The purpose of this practice-based randomized controlled trial was to evaluate the effectiveness of a new one-step self-etch adhesive to restore non-carious cervical lesions following CONSORT guidelines and to test the hypothesis that this adhesive is equally effective with or without beforehand selective etching of enamel.


METHODS
Twenty-eight patients each received two restorations randomly assigned to the control or the experimental group. In the control group, the adhesive (Bond Force, Tokuyama) was applied without beforehand enamel phosphoric-acid-etching, whereas the latter was applied first in the experimental group. The restorative composites used for all restorations were Estelite Flow Quick followed by Estelite Sigma (Tokuyama). The clinical effectiveness was assessed at baseline, 6 months, 1 year and 2 years in terms of retention, marginal staining, restoration staining, and post-operative sensitivity.


RESULTS
One restoration loss occurred in the control group before the 6-month recall. At the two-year recall, only 2 secondary endpoints showed significant differences between groups: marginal staining at the enamel occurred more often in the control group (29% vs. 5%) (hierarchical linear regression: p=0.011) and 'minor marginal defects' were significantly more frequent in the control group (29% vs. 0%) (hierarchical linear regression: p=0.009).


CONCLUSIONS
Although in a practice setting, the effectiveness of this new adhesive was very good after 2 years of clinical service. More minor defects and restoration staining at the enamel margin were noticed when enamel had not been selectively acid-etched. Selective enamel acid-etching might enhance the adhesive properties of this new one-step self-etch adhesive.
Department of Biomaterials (URB2i), University Paris Descartes, 1 rue Maurice Arnoux, 92120 Montrouge, France. helene.fron@parisdescartes.fr
Hélène
H
Fron
Jean-Noël
JN
Vergnes
Christian
C
Moussally
Stéphane
S
Cazier
Anne-Laure
AL
Simon
Jean-Baptiste
JB
Chieze
Guillaume
G
Savard
Gil
G
Tirlet
Jean-Pierre
JP
Attal
D000134:Acid Etching, Dental / Q000379:methods; D003188:Composite Resins; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D019279:Resin Cements; D016037:Single-Blind Method; D018709:Statistics, Nonparametric; D019237:Tooth Cervix; D014075:Tooth Discoloration; D057085:Tooth Wear / Q000628:therapy; D016896:Treatment Outcome
D003188:Composite Resins; D019279:Resin Cements