Once the physical tests were completed, the results yielded data suggesting that the maximum adhesive strength happened in the coronal area of teeth filled with the Top Seal cement (Group 1) where the posts were cemented with phosphoric acid, chlorhexidine, and dual resinous cement (Duolink) (subgroup 1.
In 2013, Saraiva et al analyzed the effect of etching with phosphoric acid and pretreating dentin with sodium hypochlorite on adhesive strength by means of the push-out between post and canal dentin, using a dual resinous cement (Variolink II-Ivoclar/Vivadent).
Conventional Duo-Link (Bisco) resinous cement was injected inside the canal using earbud tips (Bisco) and working in a coronary apical direction.
36 The (MTBS) of the MDP containing resin cement is higher than self adhesive or conventional resinous cement
, independently of the surface treatment (sandblasting or silica coating).
31) However, other studies fail to report higher retention values in zirconia structures treated with resinous cement containing MDP.
0 (Kuraray) self-etching dual-curing resinous cement with MDP, and group 4, RelyX U100 (3M ESPE) self-etching dual-curing resinous cement.
0 (Kuraray) self-etching dual-curing resinous cement with MDP produced higher retention values than conventional Ketac Cem (3M ESPE) glass ionomer cement, Multilink Automix (Ivoclar Vivadent) self-etching dual-curing resinous cement, and RelyX U100 (3M ESPE) self-adhesive self-etching dual-curing resinous cement.
0 (Kuraray) dual-cured resinous cement with MDP, Multilink Automix (Ivoclar Vivadent) self-etching dual-cure resinous cement, and Ketac Cem (3M ESPE) conventional glass ionomer cement did not show significant retention differences.
The porcelain cubes were cemented to the resin cubes by means of a self-adhesive resinous cement
(Relyx U100[R], 3M-Espe), which is routinely used in this type of restorations.
A model was made of a central upper incisor and its support structure: spongy bone, cortical bone, periodontal ligament, gingiva, root, gutta-percha, resinous cement layer, posts, resin core (for prefabricated posts), lithium disilicate cap, and ceramic crown.
Thus the model had isotropic properties for: ceramics, base metal post, titanium post, gutta-percha, dentine, resin, periodontal ligament, and resinous cement, as well as orthotropic properties for cortical bone, soft bone and fiberglass post (table 1).
The posts were cemented with resin-modified glass ionomer (Rely X[TM] luting of 3M ESPE), resinous cement (RelyX[TM] ARC of 3M ESPE), and universal self-adhesive resinous cement (RelyX[TM] UNICEM 3M ESPE) with cement thickness of 40 [micro]m in the case of the cast post and heterogeneous thickness of 50 [micro]m for the prefabricated posts due to their geometry, thus guaranteeing the minimum thickness previously mentioned.