Journal of Prosthetic Dentistry
Research and Education| Volume 125, ISSUE 6, P900-904, June 2021

Download started.


Microcomputed tomography evaluation of contamination with endodontic obturation material remnants in teeth with different root canal anatomy after post space preparation


      Statement of problem

      Whether the amount of the endodontic obturation material remnants in a root canal prepared for a post is related to variations in the anatomic shape of the canal or whether it varies in different parts of the post space is unclear.


      The purpose of this in vitro study was to estimate the extent of root canal contamination with remnants of the obturation material after post space preparation in relation to the anatomic shape of the root canals by means of microcomputed tomography.

      Material and methods

      Fifty freshly extracted teeth were divided into 5 test groups with respect to the root anatomy of different tooth types. The root canals were shaped and obturated with gutta percha. The space for the glass fiber post was prepared with standardized drills, and all specimens were scanned by microcomputed tomography. The areas of residual obturation material on the root canal walls in the coronal and apical parts of the prepared post space were estimated by using a 3D visualization software program. Parametric and nonparametric dispersive analysis (analysis of variance and Kruskal-Wallis) and Wilcoxon tests were used for statistical data evaluation (α=.05).


      The estimates of the root canal surface areas contaminated with residual obturation material after post space preparation were significantly larger in premolars (P≤.01), as compared with mandibular incisors and with the palatal roots of maxillary first molars. The contamination areas in different parts of the root canal (apical and coronal) reported significant differences within and between the test groups.


      The extent of root canal contamination with remnants of endodontic obturation material after post space preparation was related to the anatomic shape of the roots and varied in the coronal and apical parts of the prepared post space.
      To read this article in full you will need to make a payment

      Purchase one-time access:

      Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online access
      One-time access price info
      • For academic or personal research use, select 'Academic and Personal'
      • For corporate R&D use, select 'Corporate R&D Professionals'


      Subscribe to Journal of Prosthetic Dentistry
      Already a print subscriber? Claim online access
      Already an online subscriber? Sign in
      Institutional Access: Sign in to ScienceDirect


        • Cagidiaco M.C.
        • Goracci C.
        • Garcia-Godoy F.
        • Ferrari M.
        Clinical studies of fiber posts: a literature review.
        Int J Prosthodont. 2008; 21: 328-336
        • Signore A.
        • Kaitsas V.
        • Ravera G.
        • Angiero F.
        • Benedicenti S.
        Clinical evaluation of an oval-shaped prerfabricated glass fiber post in endodontically treated premolars presenting an oval root canal cross-section: a retrospective cohort study.
        Int J Prosthodont. 2011; 24: 255-263
        • Naumann M.
        • Koelpin M.
        • Beuer F.
        • Meyer-Lueckel H.
        10-year survival evaluation for glass-fiber supported postendodontic restoration: a prospective observational clinical study.
        J Endod. 2012; 38: 432-435
        • Ikram O.H.
        • Patel S.
        • Sauro S.
        • Mannocci F.
        Micro-computed tomography of tooth tissue volume changes following endodontic procedures and post space preparation.
        Int Endod J. 2009; 42: 1071-1076
        • Parisi C.
        • Valandro L.F.
        • Ciocca L.
        • Gatto M.R.A.
        • Baldissara P.
        Clinical outcomes and success rates of quartz fiber post restorations: a retrospective study.
        J Prosthet Dent. 2015; 114: 367-372
        • Machado F.W.
        • Bossardi M.
        • Ramos T.
        • dos S.
        • Valente L.L.
        • Munchow E.A.
        • Piva E.
        Application of resin adhesive on the surface of a silanized glass fiber–reinforced post and its effect on the retention to root dentin.
        J Endod. 2015; 41: 106-110
        • Manicardi C.A.
        • Versiani M.A.
        • Saquy P.C.
        • Pecora J.D.
        • de Sousa-Neto M.D.
        Influence of filling materials on the bonding interface of thin-walled roots reinforced with resin and quartz fiber posts.
        J Endod. 2011; 37: 531-537
        • Martinho F.C.
        • Carvalho C.A.T.
        • Oliveira L.D.
        • Farias de Lacerda A.J.
        • Xavier A.C.C.
        • Gullo Augusto M.
        • et al.
        Comparison of different dentin pretreatment protocols on the bond strength of glass fiber post using self-etching adhesive.
        J Endod. 2015; 41: 83-87
        • Cecchin D.
        • de Almeida J.F.
        • Gomes B.P.F.A.
        • Zaia A.A.
        • Ferraz C.C.R.
        Influence of chlorhexidine and ethanol on the bond strength and durability of the adhesion of the fiber posts to root dentin using a total etching adhesive system.
        J Endod. 2011; 37: 1310-1315
        • Goracci C.
        • Ferrari M.
        Current perspectives on post systems: a literature review.
        Aust Dent J. 2011; 56: 77-83
        • Mesquita G.C.
        • Veríssimo C.
        • Raposo L.H.A.
        • Santos-Filho P.C.F.
        • Soares da Mota A.
        • Soares C.J.
        Can the cure time of endodontic sealers affect bond strength to root dentin?.
        Br Dent J. 2013; 24: 340-343
        • Uzum J.
        • Arslan H.
        • Doganay E.
        • Guler B.
        • Keskin C.
        • Çapar I.D.
        Fracture resistance of endodontically treated roots with oval canals restored with oval and circular posts.
        J Endod. 2015; 41: 539-543
        • Gutmann J.L.
        • Fan B.
        Tooth morphology, isolation and access.
        in: Hargreaves K.M. Berman L.H. Cohen’s pathways of the pulp. 11th ed. Elsevier Inc., St. Louis2016: 130-209
        • Serafino C.
        • Gallina G.
        • Cumbo E.
        • Ferrari M.
        Surface debris of canal walls after post space preparation in endodontically treated teeth: a scanning electron microscopic study.
        Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2004; 97: 381-387
        • Coniglio I.
        • Magni E.
        • Goracci C.
        • Radovic I.
        • Carvalho C.A.
        • Grandini S.
        • et al.
        Post space cleaning using a new nickel titanium endodontic drill combined with different cleaning regimens.
        J Endod. 2008; 34: 83-86
        • Coniglio I.
        • Carvalho C.A.
        • Magni E.
        • Cantoro A.
        • Ferrari M.
        Post space debridement in oval-shaped canals: the use of a new ultrasonic tip with oval section.
        J Endod. 2008; 34: 752-755
        • Bitter K.
        • Eirich W.
        • Neumann K.
        • Weiger R.
        • Krastl G.
        Effect of cleaning method, luting agent and preparation procedure on the retention of fibre posts.
        Int Endod J. 2012; 45: 1116-1126
        • Durack C.
        • Brady E.
        Root canal filling.
        in: Patel S. Barnes J.J. The principles of endodontics. 3rd ed. Oxford University Press, Oxford, UK2019: 99-120
        • Swain M.V.
        • Xue J.
        State of the art of micro-CT applications in dental research.
        Int J Oral Sci. 2009; 1: 177-188
        • Caputo B.
        • Noro Filho G.A.
        • de Andrade Salgado D.M.
        • Moura-Netto C.
        • Giovani E.M.
        • Costa C.
        Evaluation of the root canal morphology of molars by using cone-beam computed tomography in a Brazilian population: Part I.
        J Endod. 2016; 42: 1604-1607
        • Milanezi de Almeida M.
        • Bernardinelli N.
        • Ordinola-Zapata R.
        • Villas-Boas M.H.
        • Amoroso-Silva P.A.
        • Brandao C.G.
        • et al.
        Micro-computed tomography analysis of the root canal anatomy and prevalence of oval canals in mandibular incisors.
        J Endod. 2013; 39: 1529-1533
        • Paes da Silva Ramos Fernandes L.M.
        • Rice D.
        • Ordinola-Zapata R.
        • Alvares Capelozza A.L.
        • Bramante C.M.
        • Jaramillo D.
        • et al.
        Detection of various anatomic patterns of root canals in mandibular incisors using digital periapical radiography, 3 cone-beam computed tomographic scanners and micro computed tomographic imaging.
        J Endod. 2014; 40: 42-45