Influence of Luting Material Filler Content on Post Cementation

Abstract

Luting of fiber posts to intra-radicular dentin represents the worst-case scenario in terms of control of polymerization shrinkage. This study tested the hypothesis that filler content of resin cements does not influence luting of fiber posts to intra-radicular dentin, by assaying polymerization stress, push-out bond strength, and nanoleakage expression. The polymerization stress of experimental cements containing 10%, 30%, 50%, or 70% in filler content was investigated. Post spaces were prepared in endodontically treated teeth, and fiber posts were cemented with the experimental cements. A push-out test was performed, and interfacial nanoleakage expression was analyzed. Results showed that luting cements with higher filler content were related to increased polymerization stress (p < 0.05), decreased push-out bond strength (p < 0.05), and increased interfacial nanoleakage expression (p < 0.05). Conversely, lower-stress luting materials increased bonding of fiber posts to intra-radicular dentin. Further in vivo studies are needed to investigate the long-term clinical performance of these materials.

Push-Out Bond Strength of Quartz Fiber Posts Luted with Self-Adhesive and Conventional Resin Cements

“…All groups in this study showed higher values in the cervical third, while the lowest were found in apical third. These results are consistent with other studies that have revealed regional differences in bond strength (5,16).…”

Restorative perspective for endodontically treated teeth: Anatomic post

“…Even though composite resin core material generally have more filler and, therefore, higher strength than resin cements, polymerization shrinkage stress is higher with 70% filler than that with 10% filler. 30 This may seem counterintuitive to most dentists, but the objective is to employ a technique that compensates for the inherent deficiencies of some types of material and capitalizes on them without becoming clinically cumbersome, time-consuming, or with the integration of outside laboratory fees.…”

Durability of Different Types of Cement on the Bonding Strength of Medicinal Biomaterial Fiber Post, In Vitro Study

“…Ferrari et al [11] presented that, when the filler load is increased, the polymerization stress will increase due to decrease in the bonding strength. The tooth/restoration interface can suffer long-term degradation due to the action of water, temperature changes, and mechanical loading [12][13][14] which lead to failure over time [13,15,16].…”