The Retention and Fracture Resistance of Two All-ceramic Post and Core Systems in Anterior Endodontically Treated Teeth

Anahita Safari, Amir Alireza Khaledi, Zeinab Shafiee, Naeeme Rahmani

Background: In anterior endodontically treated teeth a better esthetic can be achieved by using all-ceramic post -core restorations instead of metal post systems. Maximum retention and fracture resistance of the post are the criteria upon which selection of a post system is based. The aim of this study was to evaluate the fracture resistance and retention of two all-ceramic post and core systems including IPS Empress 2 post-core system and IPS Empress 2 core connected to Zirconium Cosmopost, and comparing these features among the two groups

Material and methods:  Eighty extracted maxillary central incisors and canines were divided into two groups of 40 including IPS Empress 2 and zirconium Cosmopost. To evaluate retention, shear force was applied to the cement at the crosshead speed of 0.5 mm/min; force was applied until the post was detached from the canal.  To measure the fracture resistance, the samples were loaded at 45-degrees to the horizon at the crosshead speed of 5 mm/min until fracture occurred.

Result: The mean fracture strength and standard deviation of zirconium Cosmopost and IPS Empress 2 were 302.10 N (69.922), 151.63 N (48.661), respectively. The difference between groups was significant statistically (P<0.001). The zirconium Cosmoposts had lower retention than IPS Empress2 dowel-core, but the difference between groups was insignificant (p =0.134).

  Conclusion:  Within the limitations of the study, it could be concluded that zirconium Cosmopost system may be a candidate for the restoration of anterior endodontically treated teeth, as the high fracture toughness and propitious esthetic feature.
Ceramic post; Ceramic core; Empress Ceramic; Zirconium-based ceramic; fracture strength; retention

El Guindy J, Fouda MY. Effect of obturating systems, dowel materials, and adhesive luting techniques on the resistance to fracture of endodontically treated teeth. J Prosthodont. 2010;19(7):544-52.

Sedgley CM, Messer HH. Are endodontically treated teeth more brittle? J Endod. 1992;18(7):332-5.

Ozkurt Z, Iseri U, Kazazoglu E. Zirconia ceramic post systems: a literature review and a case report. Dent Mater J. 2010;29(3):233-45.

Zhi-Yue L, Yu-Xing Z. Effects of post-core design and ferrule on fracture resistance of endodontically treated maxillary central incisors. J Prosthet Dent. 2003;89(4):368-73.

Fraga RC, Chaves BT, Mello GS, Siqueira JF, Jr. Fracture resistance of endodontically treated roots after restoration. J Oral Rehabil. 1998;25(11):809-13.

Padmanabhan P. A comparative evaluation of the fracture resistance of three different pre-fabricated posts in endodontically treated teeth: An in vitro study. J Conserv Dent. 2010;13(3):124-8.

Yalcin E, Cehreli MC, Canay S. Fracture resistances of cast metal and ceramic dowel and core restorations: a pilot study. J Prosthodont. 2005;14(2):84-90.

Mekayarajjananonth T, Chitcharus N, Winkler S, Bogert MC. The effect of fiber dowel heights in resin composite cores on restoration failures of endodontically treated teeth. J Oral Implantol. 2009;35(2):63-9.

Rosentritt M, Fürer C, Behr M, Lang R, Handel G. Comparison of in vitro fracture strength of metallic and tooth-coloured posts and cores. J Oral Rehabil. 2000;27(7):595-601.

Al-Wahadni AM, Hussey DL, Grey N, Hatamleh MM. Fracture resistance of aluminium oxide and lithium disilicate-based crowns using different luting cements: an in vitro study. J Contemp Dent Pract. 2009;10(2):51-8.

Gluskin AH, Ahmed I, Herrero DB. The aesthetic post and core: unifying radicular form and structure. Pract Proced Aesthet Dent. 2002;14(4):313-21.

Abduljabbar T, Sherfudhin H, AlSaleh SA, Al-Helal AA, Al-Orini SS, Al-Aql NA. Fracture resistance of three post and core systems in endodontically treated teeth restored with all-ceramic crowns. KSUJDS. 2012;3(1):33-8.

Guazzato M, Albakry M, Ringer SP, Swain MV. Strength, fracture toughness and microstructure of a selection of all-ceramic materials. Part I. Pressable and alumina glass-infiltrated ceramics. Dent Mater. 2004;20(5):441-8.

Jeong SM, Ludwig K, Kern M. Investigation of the fracture resistance of three types of zirconia posts in all-ceramic post-and-core restorations. Int J Prosthodont. 2002;15(2):154-8.

Al-harbi F, Nathanson D. In vitro assessment of retention of four esthetic dowels to resin core foundation and teeth. J Prosthet Dent. 2003;90(6):547-55.

Maccari PC, Conceicao EN, Nunes MF. Fracture resistance of endodontically treated teeth restored with three different prefabricated esthetic posts. J Esthet Restor Dent. 2003;15(1):25-30.

Cormier CJ, Burns DR, Moon P. In vitro comparison of the fracture resistance and failure mode of fiber, ceramic, and conventional post systems at various stages of restoration. J Prosthodont. 2001;10(1):26-36.

Kakehashi Y, Lüthy H, Naef R, Wohlwend A, Schärer P. A new all-ceramic post and core system: clinical, technical, and in vitro results. Int J Periodontics Restorative Dent. 1998;18(6):586-93.

Refbacks

  • There are currently no refbacks.