FE analysis of conceptual hybrid composite endodontic post designs in anterior teeth.

OBJECTIVES To assess conceptual designs of dental posts consisting of polyetherimide (PEI) reinforced with carbon (C) and glass (G) glass fibers in endodontically treated anterior teeth. METHODS 3D tessellated CAD and geometric models of endodontically treated anterior teeth were generated from Micro-CT scan images. Model C-G/PEI composite posts with different Young's moduli were analyzed by Finite Element (FE) methods post A (57.7GPa), post B (31.6GPa), post C (from 57.7 to 9.0GPa in the coronal-apical direction). A load of 50N was applied at 45° to the longitudinal axis of the tooth, acting on the palatal surface of the crown. The maximum principal stress distribution was determined along the post and at the interface between the post and the surrounding structure. RESULTS Post C, with Young's modulus decreasing from 57.7 to 9.0GPa in the coronal-apical direction, reduced the maximum principal stress distribution in the restored tooth. Post C gave reduced stress and the most uniform stress distribution with no stress concentration, compared to the other C-G/PEI composite posts. SIGNIFICANCE The FE analysis confirmed the ability of the functionally graded post to dissipate stress from the coronal to the apical end. Hence actual (physical) C-G/PEI posts could permit optimization of stress distributions in endodontically treated anterior teeth.

[1]  A. Apicella,et al.  Three-dimensional finite element analysis of stress and strain distributions in post-and-core treated maxillary central incisors. , 2007, The journal of adhesive dentistry.

[2]  C. Soares,et al.  Influence of post system and remaining coronal tooth tissue on biomechanical behaviour of root filled molar teeth. , 2011, International endodontic journal.

[3]  D. Assif,et al.  Effect of post design on resistance to fracture of endodontically treated teeth with complete crowns. , 1993, The Journal of prosthetic dentistry.

[4]  K Genovese,et al.  Finite element analysis of a new customized composite post system for endodontically treated teeth. , 2005, Journal of biomechanics.

[5]  P. Ausiello,et al.  CAD-FE modeling and analysis of class II restorations incorporating resin-composite, glass ionomer and glass ceramic materials. , 2017, Dental materials : official publication of the Academy of Dental Materials.

[6]  A. Ozyesil,et al.  Effect of dentin bonding and ferrule preparation on the fracture strength of crowned teeth restored with dowels and amalgam cores. , 2006, The Journal of prosthetic dentistry.

[7]  Ideal obturation using synthetic root-filling systems: coronal sealing and fracture resistance. , 2006, Practical procedures & aesthetic dentistry : PPAD.

[8]  M. Hsu,et al.  Effects of post materials and length on the stress distribution of endodontically treated maxillary central incisors: a 3D finite element analysis. , 2009, Journal of oral rehabilitation.

[9]  Antonio Gloria,et al.  Composite materials for hip joint prostheses , 2010 .

[10]  L. Nicolais,et al.  Polymer-based composite hip prostheses. , 2000, Journal of inorganic biochemistry.

[11]  Begüm Akkayan,et al.  Resistance to fracture of endodontically treated teeth restored with different post systems. , 2002, The Journal of prosthetic dentistry.

[12]  S. Salis,et al.  Impact-fracture energy of human premolar teeth. , 1987, The Journal of prosthetic dentistry.

[13]  A. Vichi,et al.  Retrospective study of the clinical performance of fiber posts. , 2000, American journal of dentistry.

[14]  R. Aversa,et al.  Evaluation of the biomechanical behavior of maxillary central incisors restored by means of endocrowns compared to a natural tooth: a 3D static linear finite elements analysis. , 2006, Dental materials : official publication of the Academy of Dental Materials.

[15]  Fibreglass-reinforced composite endodontic posts , 2022 .

[16]  P. Ausiello,et al.  Mechanical behavior of endodontically restored canine teeth: Effects of ferrule, post material and shape. , 2017, Dental materials : official publication of the Academy of Dental Materials.

[17]  R. Scotti,et al.  Clinical evaluation of teeth restored with quartz fiber-reinforced epoxy resin posts. , 2003, The International journal of prosthodontics.

[18]  S. Grandini,et al.  Use of anatomic post and core for reconstructing an endodontically treated tooth: a case report. , 2003, The journal of adhesive dentistry.

[19]  V. Karbhari,et al.  Monoblocks in root canals: a finite elemental stress analysis study. , 2011, International endodontic journal.

[20]  A. Kishen.  Mechanisms and risk factors for fracture predilection in endodontically treated teeth , 2006 .

[21]  Beata Dejak,et al.  The influence of ferrule effect and length of cast and FRC posts on the stresses in anterior teeth. , 2013, Dental materials : official publication of the Academy of Dental Materials.

[22]  A Asundi,et al.  Photomechanical investigations on post endodontically rehabilitated teeth. , 2002, Journal of biomedical optics.

[23]  Aquaviva S Fernandes,et al.  Factors determining post selection: a literature review. , 2003, The Journal of prosthetic dentistry.

[24]  J. Astbäck,et al.  A retrospective study of 236 patients with teeth restored by carbon fiber-reinforced epoxy resin posts. , 1998, The Journal of prosthetic dentistry.

[25]  L. Correr-Sobrinho,et al.  Influence of ferrule preparation with or without glass fiber post on fracture resistance of endodontically treated teeth , 2010, Journal of applied oral science : revista FOB.

[26]  M. Ozcan,et al.  The fit of tapered posts in root canals luted with zinc phosphate cement: a histological study. , 2005, Dental materials : official publication of the Academy of Dental Materials.

[27]  P. Sharrock,et al.  Mechanical properties of glass fiber-reinforced endodontic posts. , 2009, Acta biomaterialia.

[28]  A. Apicella,et al.  Investigation on the static and dynamic structural behaviors of a regional aircraft main landing gear by a new numerical methodology , 2017 .

[29]  F. Tay,et al.  Clinical performance of fiber post restorations in endodontically treated teeth: 2-year results. , 2007, The International journal of prosthodontics.

[30]  F. Tay,et al.  Clinical evaluation of the use of fiber posts and direct resin restorations for endodontically treated teeth. , 2005, The International journal of prosthodontics.

[31]  P. Conti,et al.  Effect of a crown ferrule on the fracture resistance of endodontically treated teeth restored with prefabricated posts. , 2006, The Journal of prosthetic dentistry.

[32]  B. M. Harris,et al.  Resistance to cusp fracture in endodontically treated teeth. , 1987, Dental materials : official publication of the Academy of Dental Materials.

[33]  R. Sakaguchi.  Craig's Restorative Dental Materials - E-Book , 2019 .

[34]  M. Catauro,et al.  Further Theoretical Insight into the Mechanical Properties of Polycaprolactone Loaded with Organic–Inorganic Hybrid Fillers , 2018, Materials.

[35]  M. de Mattos,et al.  Endodontically treated teeth: characteristics and considerations to restore them. , 2011, Journal of prosthodontic research.

[36]  O. Peters,et al.  Restoration of endodontically treated teeth without posts. , 2003, American journal of dentistry.

[37]  Eujin Pei,et al.  Design and Analysis of 3D Customized Models of a Human Mandible , 2016 .

[38]  P. Ausiello,et al.  Stress distribution of bulk-fill resin composite in class II restorations. , 2017, American Journal of Dentistry.

[39]  C. Goracci,et al.  Current perspectives on post systems: a literature review. , 2011, Australian dental journal.

[40]  P. Wilson,et al.  The ferrule effect: a literature review. , 2002, International endodontic journal.

[41]  Zoran R. Vulicevic,et al.  Ferrule effect: a literature review. , 2012, Journal of endodontics.

[42]  Sang‐Wan Shin,et al.  Corrigendum to “Biomechanical Evaluation of a Tooth Restored with High Performance Polymer PEKK Post-Core System: A 3D Finite Element Analysis” , 2017, BioMed Research International.

[43]  Barry Francis Arthur Quinn,et al.  Manual of Clinical Procedures in Dentistry: Chapter 3 Requirements in the Clinical Environment , 2018 .

[44]  Annika Torbjörner,et al.  Biomechanical aspects of prosthetic treatment of structurally compromised teeth. , 2004, The International journal of prosthodontics.

[45]  A. Çetin,et al.  The effect of different restoration techniques on the fracture resistance of endodontically-treated molars. , 2008, Operative dentistry.

[46]  P. Ausiello,et al.  Debonding of adhesively restored deep Class II MOD restorations after functional loading. , 1999, American journal of dentistry.

[47]  A. Saidi,et al.  Influence of inhomogeneous dental posts on stress distribution in tooth root and interfaces: Three‐dimensional finite element analysis , 2017, The Journal of prosthetic dentistry.

[48]  P. Boudrias,et al.  Anatomical post design meets quartz fiber technology: rationale and case report. , 2001, Compendium of continuing education in dentistry.

[49]  P. Ausiello,et al.  Mechanical behavior of post-restored upper canine teeth: a 3D FE analysis. , 2011, Dental materials : official publication of the Academy of Dental Materials.

[50]  G. Görgül,et al.  Fracture resistance of premolars with one remaining cavity wall restored using different techniques. , 2010, Dental materials journal.

[51]  D. Watts,et al.  Sequential software processing of micro-XCT dental-images for 3D-FE analysis. , 2009, Dental materials : official publication of the Academy of Dental Materials.

[52]  R. Martelli.  Fourth-generation intraradicular posts for the aesthetic restoration of anterior teeth. , 2000, Practical periodontics and aesthetic dentistry : PPAD.

[53]  P. Wilson,et al.  The ferrule effect. , 2008, Dental update.

[54]  Raffaella Aversa,et al.  3D FEA of cemented steel, glass and carbon posts in a maxillary incisor. , 2005, Dental materials : official publication of the Academy of Dental Materials.

[55]  Sang‐Wan Shin,et al.  Biomechanical Evaluation of a Tooth Restored with High Performance Polymer PEKK Post-Core System: A 3D Finite Element Analysis , 2017, BioMed research international.

[56]  F. A. Peyton,et al.  Elastic and Mechanical Properties of Human Dentin , 1958, Journal of dental research.

[57]  N. H. Abu Kasim,et al.  3D-FE analysis of functionally graded structured dental posts. , 2011, Dental materials journal.

[58]  S. Caputi,et al.  Fracture resistance and deflection of pulpless anterior teeth restored with composite or porcelain veneers. , 2010, Journal of endodontics.