Effect of bonded area and/or fiber post placement on the fracture strengths of resin-core reconstructions for pulpless teeth

Masatoshi Nakajima, Tama Kanno, Wataru Komada, Hiroyuki Miura, Richard M. Foxton, Junji Tagami

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Purpose: To compare the fracture strengths of pulpless teeth restored using resin cores with and without fiber posts, and with and without bonding adhesive in the post cavity. Methods: Human extracted roots were prepared with post cavities and divided into four experimental groups: Groups 1 and 2 - after application of adhesive to both the top surface of the root and the inner surface of the post cavity, DC core Automix was injected into the post space with or without fiber-post placement; Groups 3 and 4 - adhesive was applied to the top surface of the root only, with or without post placement. Resin-cores were then built-up. Teeth prepared for full crowns served as controls. After water storage at 37 degrees C for 24 hours, the all specimens were embedded in acrylic resin at 2 mm below CEJ, and loaded at 45 degrees to the long axis of the tooth using a universal testing machine until fracture. The data were analyzed by one-way ANOVA (alpha=0.05). Results: The fracture loads were, Group 1: 1832 +/- 240 N, Group 2: 1815 +/- 347 N, Group 3: 1626 +/- 396 N, Group 4: 1810 +/- 332 N, Control Group: 1622 +/- 274 N. There were no significant differences among all the groups (P> 0.05). (Am J Dent 2010;23:300-304).
Original languageEnglish
Pages (from-to)300 - 304
Number of pages5
JournalAMERICAN JOURNAL OF DENTISTRY
Volume23
Issue number6
Publication statusPublished - Dec 2010

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