Clinical evaluation of restorations with self-etch adhesive and nanofilled composite in class I and class II cavities.
BACKGROUND
In the era of adhesive restorative dentistry the principles of conventional cavity preparation have acquired a new meaning. The emphasis is shifted from "widening for preventive purposes" and preparation of macro-mechanical retention to "consciously limited" preparation. The clinical and biological durability of restorations depends on the adhesive bond and the quality of the composite material.


OBJECTIVE
The aim of the study was to conduct a clinical evaluation of restorations with a self-etch single-step adhesive and nanofilled composite in class I and class II cavities over a period of 15 months.


METHODS
The clinical trial involved 34 patient (volunteers) who received 76 posterior restorations of medium and deep cavities with the self-etch adhesive Adper Prompt L-Pop and nanofilled composite Filtek Supreme (3MESPE Dental products USA). All restorations were evaluated by the modified Ryge and Cvar criteria at 6- and 15-month intervals.


RESULTS
Loss of restorations with a self-etch single-step adhesive and nanofilled composite at 6 months and 15 months was 0% and 6.7%, respectively. The evaluation of discolouration in the restorations at 6 months revealed no significant changes (P > 0.05, u = 1.72). There was certain deterioration in the colour at 15 months (P < 0.05, u = 2.96). Statistically significant changes in the marginal discolouration were observed at 6 months (P < 0.05, u = 2.79) in comparison with the initial scores. During the 15-month follow-up the discolouration on the margins of the restorations was statistically nonsignificant compared to the 6-month follow-up (P > 0.05, u = 0.36). There were no C (Charlie) scores recorded during the 15-month follow-up study within the continuing observation.


CONCLUSIONS
The restorations with nanofilled composite and self-etch single-step adhesive fulfill the requirements for clinical use in posterior restorations.
Department of Operative Dentistry and Endodontology, Faculty of Dental Medicine, Medical University, Plovdiv, Bulgaria. nmanchorowa@yahoo.com
Neshka A
NA
Manchorova
Stoyan B
SB
Vladimirov
Zoya K
ZK
Donencheva
Ivan S
IS
Drashkovich
Stanislav K
SK
Manolov
Veselina I
VI
Todorova
D000134:Acid Etching, Dental; D000328:Adult; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003731:Dental Caries / Q000145:classification / Q000628:therapy*; D003737:Dental Cavity Preparation / Q000379:methods*; D003793:Dental Restoration, Permanent / Q000379:methods*; D006801:Humans
D003188:Composite Resins