Is adhesive cementation of endodontic posts necessary?
Recently, the appropriate, durable bond of adhesive systems and composite resin cements to retain endodontic posts was challenged. The question arises whether it would be possible to place glass fiber posts in a less technique sensitive conventional nonadhesive approach. The influence of nonadhesive, self-adhesive, and etch-and-rinse systems on load capability of postendodontic restorations was studied. Human maxillary central incisors were divided into 4 groups (n = 10). Teeth were endodontically treated and restored by using glass fiber posts luted with different cements/composite resin combinations: (1) RelyX Unicem (3M ESPE, Seefeld, Germany)/Clearfil Core (Kuraray Europe, Duesseldorf, Germany), (2) RelyX Unicem/LuxaCore, (3) zinc phosphate cement/Clearfil, and (4) LuxaCore (DMG, Hamburg, Germany)/Clearfil. A 2 mm-ferrule preparation was performed. All specimens received adhesively luted all-ceramic crowns and were exposed to thermal cycling and mechanical loading before subsequent static loading. Significant differences between the experimental groups regarding load capability and fracture patterns were observed. The conventional non-adhesive post cementation is less reliable to withstand simulated functional forces compared to adhesive approaches.
Naumann
Michael
M
Department of Dental Prosthodontics and Material Science, University of Leipzig, Leipzig, Germany. micha.naumann@gmx.de
Sterzenbach
Guido
G
Rosentritt
Martin
M
Beuer
Florian
F
Frankenberger
Roland
R
D000134:Acid Etching, Dental / Q000379:methods; D000269:Adhesives; D002484:Cementation / Q000379:methods*; D003188:Composite Resins; D003442:Crowns; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D004548:Elasticity; D017276:Friction; D005898:Glass; D006801:Humans; D007180:Incisor; D053208:Kaplan-Meier Estimate; D008409:Mastication; D011176:Post and Core Technique; D019279:Resin Cements; D018709:Statistics, Nonparametric; D013718:Tensile Strength; D015036:Zinc Phosphate Cement
D000269:Adhesives; D003188:Composite Resins; D019279:Resin Cements; C009753:fiberglass; D015036:Zinc Phosphate Cement