Eight-year randomized clinical evaluation of Class II nanohybrid resin composite restorations bonded with a one-step self-etch or a two-step etch-and-rinse adhesive
Date:
31 Oct 2014
Abstract
Objectives
The
aim of this study is to observe the durability of Class II nanohybrid
resin composite restorations, placed with two different adhesive
systems, in an 8-year follow-up.
Methods
Seventy-eight
participants received at random at least two Class II restorations of
the ormocer-based nanohybrid resin composite (Ceram X) bonded with
either a one-step self-etch adhesive (Xeno III) or a control two-step
etch-and-rinse adhesive (Excite). The 165 restorations were evaluated
using slightly modified United States Public Health Services (USPHS)
criteria at baseline and then yearly during 8 years.
Results
One
hundred and fifty-eight restorations were evaluated after 8 years.
Three participants with five restorations (three Xeno III, two Excite)
were registered as dropouts. Twenty-one failed restorations (13.3 %)
were observed during the follow-up. Twelve in the one-step self-etch
adhesive group (13.5 %) and nine in the two-step etch-and-rinse group
(13.0 %). This resulted in nonsignificant different annual failure rates
of 1.69 and 1.63 %, respectively. Fracture of restoration was the main
reason for failure.
Conclusion
Good
clinical performance was shown during the 8-year evaluation and no
significant difference in overall clinical performance between the two
adhesives. Fracture was the main reason for failure.
Clinical relevance
The
one-step self-etch adhesive showed a good long-term clinical
effectiveness in combination with the nanohybrid resin composite in
Class II restorations.
Comments