Bonding effectiveness of contemporary composite cements to dentin after Six months water storage.
Purpose: To evaluate the bonding effectiveness to dentin of eight dual-cure composite cements after
6-month water storage. Materials and Methods: This study is a follow-up ofa recent study that investigated
the 1-week bonding effectiveness of feldspathic ceramic blocks luted to dentin using the same composite
cements and experimental protocol. The microtensile bond strength (~LTBS) of different composite
cements, including two etch-and-rinse cements (Calibra, Dentsply; Variolink Il, lvoclar-Vivadent), two
self-etch cements (Panavia F2.0, Kuraray; Clearfil Esthetic Cement, Kuraray), and four self-adhesive
cements (Unicem, 3M ESPE; Maxcem, Kerr; Monocem, Shofu; G-Cem, GC), was measured using a
standardized 11TBS protocol after 6-month water storage. As control, a two-step self-etch adhesive (Ciearfil
SE, Kuraray) combined with a microhybrid restorative composite (Ciearfil AP-X, Kuraray) was used.
Twenty-seven human third molars were used with specifie preparation, and after 6-month water storage,
microspecimens were prepared and subjected to a 11TBS test. Results: The mean 11TBS varied from 0
to 26.1 MPa, the latter being measured for the control adhesive composite combination. Ali specimens
prepared using the self-adhesive composite cements Maxcem and Monocem failed during specimen
processing. Most specimens failed at the dentin-œment interface, except the self-etch composite cement
Panavia F2.0 that failed in 53% of the cases at the cement-ceramic interface and the control of which
ali specimens failed in the resin part of the microspecimens. Conclusion: The largely varying bonding
effectiveness recorded for the different composite cements highlights the need for material specifications.
Such specifications should also include a bond durability test as the specimens in the present study that
were subjected to 6-month water storage. To lute ceramic restorations that allow light transmission to a
sufficient degree, a conventionallight-curable adhesive and composite should be considered.
Auteur(s) : Sarr M, Faye B, Leye-Benoist F, Bane K, Aidara Aw, Touré B.
Pages : 86-92
Année de publication : 2016
Revue : Journal of Restorative Dentistry
N° de volume : 4 (3)
Type : Article
Mise en ligne par : FAYE Babacar