Impact of Root Dentin Thickness on the in vitro Compressive Strength of Teeth treated with Recent Post and Core Systems
Sahil Mogla, Amit Bhagat, Litik Mittal, Tawanpreet Kaur, Gursimran Marwah
Citation Information :
Mogla S, Bhagat A, Mittal L, Kaur T, Marwah G. Impact of Root Dentin Thickness on the in vitro Compressive Strength of Teeth treated with Recent Post and Core Systems. J Contemp Dent Pract 2017; 18 (11):1065-1070.
Endodontically treated teeth dry with time, and its dentin undergoes changes making the teeth brittle and friable. The main function of a post is to strengthen or reinforce a weakened root. However, doing a post and core frequently requires the removal of sound tooth tissue. Recent materials introduced in the market for post and cores have been promising.
Aim
The aim of this study is to evaluate the fracture resistance of endodontically treated extracted permanent teeth with variable remaining root dentin thickness after post space preparation.
Materials and methods
A total of 270 freshly extracted permanent maxillary central incisors with fully formed apices were selected, decoronated at cementoenamel junction, and divided into three main groups according to remaining root dentin thickness, determined using a Vernier caliper into 0.5, 1, and 1.50 mm after post space preparation. Each group was further divided into three subgroups (subgroup a: Custom-made cobalt–chromium alloy post and core; subgroup b: Prefabricated glass fiber post and composite core; and subgroup c: EverStick fiber post). Each specimen was subjected to compressive load using universal testing machine. The force required to fracture was recorded and data were analyzed using analysis of variance (ANOVA) test.
Results
Analysis of variance revealed that compressive strength of the tooth is significantly affected by the increase in the remaining dentin thickness after post space preparation (p < 0.05). Furthermore, teeth with custom fabricated posts showed a significantly higher compressive strength (p < 0.05) than prefabricated glass fiber post and EverStick fiber post groups except the group with minimum remaining dentin thickness.
Conclusion
The present in vitro study revealed that compressive strength of the post and core systems is directly related to the amount of healthy remaining dentin thickness. Hence, efforts to maximize the preservation of natural dentin should be taken during post space preparation.
How to cite this article
Bhagat A, Mittal L, Mogla S, Kaur T, Dheeraj M, Marwah G. Impact of Root Dentin Thickness on the in vitro Compressive Strength of Teeth treated with Recent Post and Core Systems. J Contemp Dent Pract 2017;18(11):1065-1070.
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Stress distribution of oval and circular fiber posts in amandibular premolar: a three-dimensional finite element analysis. J Adv Prosthodont 2013 Nov;5(4):434-439.
Recent advances in post systems: a review. J Appl Dent Med Sci 2015 Oct-Dec;1(3):128-136.
Fracture strength and nanoleakage of weakened roots reconstructed using relined glass fiber-reinforced dowels combined with a novel prefabricated core system. J Prosthodont 2014 Aug;23(6):484-494.
Placement of fiber prefabricated or custom made posts affects the 3-year survival of endodontically treated premolars. Am J Dent 2008 Jun;21(3):179-184.
Fracture strength of root filled premolar teeth restored with silorane and methacrylate-based resin composite. J Dent 2015 Jun;43(6):735-741.
Restoration of endodontically treated teeth review and treatment recommendations. Int J Dent 2009 Jan;2009:150251.
Evaluation of retention of two different cast post-core systems and fracture resistance of the restored teeth. J Dent (Shiraz) 2015 Jun;16(2):121-128.
Effect of post type and restorative techniques on the strain and fracture resistance of flared incisor roots. Braz Dent J 2011 Jul;22(3):230-237.
The effect of glass fiber-reinforced epoxy resin dowel diameter on the fracture resistance of endodontically treated teeth. J Prosthodont 2014 Oct;23(7):572-581.
Effect of resin-based materials on fracture resistance of endodontically treated thin-walled teeth. J Prosthet Dent 2013 May;109(5):296-303.
The semi-interpenetrating polymer network matrix of fiber-reinforced composite and its effect on the surface adhesive properties. J Mater Sci Mater Med 2003 Sep;14(9):803-809.
Fracture strength of endodontically treated teeth with flared root canals and restored with different post systems. J Esthet Restor Dent 2007 Jan;19(1):30-36.
Effect of eugenol-containing endodontic sealer on retention of prefabricated posts luted with adhesive composite resin cement. Quintessence Int 1992 Dec;23(12):839-844.
Static and fatigue fracture resistances of pulpless teeth restored with post-cores. Dent Mater 2008 Sep;24(9):1178-1186.
In vitro fracture resistance of glass-fiber and cast metal posts with different lengths. J Prosthet Dent 2009 Mar;101(3):183-188.
Fracture resistance of thin-walled roots restored with different post systems. Int Endod J 2009 Nov;42(11):997-1003.
Fracture resistance of weakened roots restored with composite resin and glass fiber post. Braz Dent J 2008;19(4):329-333.
Effect of remaining dentine structure and thermal-mechanical aging on the fracture resistance of bovine roots with different post and core systems. Int Endod J 2008 Nov;41(11):969-976.
Influence of remaining dentin wall thickness on the fracture strength of endodontically treated tooth. J Conserv Dent 2016 Jan-Feb;19(1):63-67.
