A prospective, randomized clinical trial of a two-step self-etching vs two-step etch-and-rinse adhesive and SEM margin analysis: four-year results.
OBJECTIVE
The aim of this blinded, randomized, prospective long-term study was to evaluate the clinical performance of the two-step self-etching adhesive AdheSE (AS, Ivoclar Vivadent) compared to the etch-and-rinse adhesive system Excite (EX, Ivoclar Vivadent) in combination with the hybrid resin composite Tetric Ceram HB (Ivoclar Vivadent) for Class I and II restorations.


METHODS
In accordance with a split mouth design, 50 patients received 100 restorations in premolars and molars. The restorations were assigned at random to the self-etching (AS) or the etch-and-rinse (EX) group. Each restoration was scored according to the modified Ryge criteria at baseline and after 6, 12, 24 and 48 months. Epoxy resin replicas of 60 restorations were made at each observation period for an additional SEM analysis of the occlusal margins.


RESULTS
After 4 years, 60 of 100 restorations could be evaluated. The cumulative survival rate for group EX was 100% and for group AS 96.7%. One restoration in group AS had failed due to marginal gap formation. For the criterion marginal adaption in group AS, significantly more bravo ratings (30%) were observed after 4 years compared to group EX (6.7%) (p < 0.05; Mann-Whitney U-test). The results of the SEM margin analysis revealed no significant differences between groups AS and EX (Mann-Whitney U-test; p > 0.05).


CONCLUSIONS
Both adhesive systems performed satisfactorily over the four-year observation period. A significant deterioration over time was found for the criterion marginal adaption in AdheSE.
Department of Operative Dentistry and Periodontology, Martin Luther University, Halle, Germany. annett.boeckler@medizin.uni-halle.de
Annett
A
Boeckler
Lars
L
Boeckler
Kirstin
K
Eppendorf
Hans-Günter
HG
Schaller
Christian R
CR
Gernhardt
D000180:Acrylic Resins; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003188:Composite Resins; D045662:Dental Etching / Q000379:methods*; D003763:Dental Leakage; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000379:methods*; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008689:Methacrylates; D008855:Microscopy, Electron, Scanning; D008875:Middle Aged; D003765:Models, Dental; D011446:Prospective Studies; D019279:Resin Cements; D018709:Statistics, Nonparametric; D055815:Young Adult
D000180:Acrylic Resins; C489662:AdheSE cement; D003188:Composite Resins; C420130:Excite cement; D008689:Methacrylates; D019279:Resin Cements; C121818:Tetric ceram