Advertisement

C-shaped Canal System in Mandibular Second Molars Part IV: 3-D Morphological Analysis and Transverse Measurement

Published:August 10, 2006DOI:https://doi.org/10.1016/j.joen.2006.05.014

      Abstract

      The purpose of this study was to investigate three-dimensional (3-D) morphology of C-shaped root canal system using micro-computed tomography (μCT) and 3-D reconstruction. There were 102 extracted mandibular second molars with fused roots collected from a native Chinese population. The teeth were scanned by μCT and reconstructed by 3-D software. The 98 teeth that possessed a C-shaped canal system were further analyzed. The 3-D reconstructed images of canals were classified into three categories: merging type (type I), symmetrical type (type II), and asymmetrical type (type III). The cross-sectional images of each tooth were submitted to computer analysis, and the minimum canal wall thickness was measured. In these 98 molars, 32 (32.65%) teeth showed a merging type appearance, 38 (38.78%) a symmetrical type and 28 (28.57%) an asymmetrical type. The minimum canal wall thickness in type I was thicker than that in type II or type III in the apical and middle portion (p < 0.05). Being fully aware of the configuration of C-shaped root canal system and the location of minimum wall thickness will ensure more efficient root canal treatment.

      Key Words

      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:

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

      References

        • Yang Z.P.
        • Yang S.F.
        • Lin Y.C.
        • Shay J.C.
        • Chi C.Y.
        C-shaped root canals in mandibular second molars in a Chinese population.
        Endod Dent Traumatol. 1988; 4: 160-163
        • Walker R.T.
        Root form and canal anatomy of mandibular second molars in a southern Chinese population.
        J Endod. 1988; 14: 325-329
        • Gutmann J.L.
        • Dumsha T.C.
        • Lovdahl P.E.
        Problem solving in endodontics: prevention, identification and management. 4th ed. Mosby, St Louis2005: 186-191
        • Manning S.A.
        Root canal anatomy of mandibular second molars. Part II. C-shaped canals.
        Int Endod J. 1990; 23: 40-45
        • Melton D.C.
        • Krell K.V.
        • Fuller M.W.
        Anatomical and histological features of C-shaped canals in mandibular second molars.
        J Endod. 1991; 17: 384-388
        • Seo M.S.
        • Park D.S.
        C-shaped root canals of mandibular second molars in a Korean population: clinical observation and in vitro analysis.
        Int Endod J. 2004; 37: 139-144
        • Blaskovic-Subat V.
        • Smojver B.
        • Maricic B.
        • Sutalo J.
        A computerized method for the evaluation of root canal morphology.
        Int Endod J. 1995; 28: 290-296
        • Lyroudia K.
        • Samakovitis G.
        • Pitas I.
        • et al.
        3D reconstruction of two C-shape mandibular molars.
        J Endod. 1997; 23: 101-104
        • Cimilli H.
        • Cimilli T.
        • Mumcu G.
        • Kartal N.
        • Wesselink P.
        Spiral computed tomographic demonstration of C-shaped canals in mandibular second molars.
        Dentomaxillofac Radiol. 2005; 34: 164-167
        • Fan B.
        • Cheung G.S.
        • Fan M.
        • Gutmann J.L.
        • Fan W.
        C-shaped canal system in mandibular second molars: part II–radiographic features.
        J Endod. 2004; 30: 904-908
        • Peters O.A.
        • Laib A.
        • Ruegsegger P.
        • Barbakow F.
        Three-dimensional analysis of root canal geometry by high-resolution computed tomography.
        J Dent Res. 2000; 79: 1405-1409
        • Nielsen R.B.
        • Alyassin A.M.
        • Peters D.D.
        • Carnes D.L.
        • Lancaster J.
        Microcomputed tomography: an advanced system for detailed endodontic research.
        J Endod. 1995; 21: 561-568
        • Peters O.A.
        • Laib A.
        • Gohring T.N.
        • Barbakow F.
        Changes in root canal geometry after preparation assessed by high-resolution computed tomography.
        J Endod. 2001; 27: 1-6
        • Fan B.
        • Cheung G.S.
        • Fan M.
        • Gutmann J.L.
        • Bian Z.
        C-shaped canal system in mandibular second molars: part I–anatomical features.
        J Endod. 2004; 30: 899-903
        • Al-Fouzan K.S.
        C-shaped root canals in mandibular second molars in a Saudi Arabian population.
        Int Endod J. 2002; 35: 499-504
        • Carlsen O.
        • Alexandersen V.
        • Heitmann T.
        • Jakobsen P.
        Root canals in one-rooted maxillary second molars.
        Scand J Dent Res. 1992; 100: 249-256
        • Pilo R.
        • Corcino G.
        • Tamse A.
        Residual dentin thickness in mandibular premolars prepared with hand and rotatory instruments.
        J Endod. 1998; 24: 401-404
        • Jerome C.E.
        C-shaped root canal system: diagnosis, treatment, and restoration.
        Gen Dent. 1994; 42: 424-427
        • Lim S.S.
        • Stock C.J.
        The risk of perforation in the curved canal: anticurvature filing compared with the stepback technique.
        Int Endod J. 1987; 20: 33-39