Topography of Primary Molar Pulp Chamber Floor: A Scanning Electron Microscopy and Micro-Computed Tomography Analysis
Keywords:Dental Pulp Cavity, Tomography, X-Ray Computed, Molar, Microscopy, Electron, Scanning
Objective: To determine in vitro the frequency, shape, type, diameter, and patency of accessory canals in the primary molars pulp chamber floor. Material and Methods: Sixteen healthy primary molars were evaluated by micro-computed tomography and scanning electron microscopy. Descriptive analyses of the frequency, shape (round, oval, or irregular), type (blind, true, or hidden), patency and diameter of the accessory canals were performed. Results: Half of the teeth presented accessory canals, 62.5% of which were located in the upper molars and 37.5% in the lower molars. The most frequent shape was irregular. In three-dimensional analysis, blind accessory canals (12.5%) and with patency (18.7%) of the teeth were observed. The average accessory canal diameter was 51.97 µm (± 26.03 µm). Conclusion: Upper molars showed a higher frequency of accessory canals with larger diameters. The irregular shape was the most frequent. 18.7% of accessory channels showed patency.
Kramer PF, Faraco IM, Meira R. A SEM investigation of accessory foramina in the furcation areas of primary molars. J Clin Pediatr Dent 2003, 27(2):157-62. https://doi.org/10.17796/jcpd.27.2.98132n48870n3303
Kumar VD. A scanning electron microscope study of prevalence of accessory canals on the pulpal floor of deciduous molars. J Indian Soc Pedod Prev Dent 2009; 7(2):85-9. https://doi.org/10.4103/0970-4388.55332
Lugliè PF, Grabesu V, Spano G, Lumbau A. Accessory foramina in the furcation area of primary molars. A SEM investigation. Eur J Paediatr Dent 2012; 13(4):329-32.
Al-Fouzan KS. A new classification of endodontic-periodontal lesions. Int J Dent 2014; 2014:919173. https://doi.org/10.1155/2014/919173
Cordeiro MMR, Rocha MJC. The effects of perirradicular inflamation and infection on a primary tooth and permanente successor. J Clin Pediatr Dent 2005; 29(3):193-200. https://doi.org/10.17796/jcpd.29.3.5238p10v21r2j162
Cleghorn BM, Boorberg NB, Christie WH. Primary human teeth and their root canal systems. Endod Topics 2012; 23(1):6-33. https://doi.org/10.1111/etp.12000
Poornima P, Subba Reddy VV. Comparison of digital radiography, decalcification, and histologic sectioning in the detection of accessory canals in furcation areas of human primary molars. J Indian Soc Pedod Prev Dent 2008; 26(2):49-52. https://doi.org/10.4103/0970-4388.41615
Gutmann JL. Prevalence, location, and patency of accessory canals in the furcation region of permanent molars. J Periodontol 1978; 49(1):21-6. https://doi.org/10.1902/jop.19188.8.131.52
Kuroiwa M, Kodaka T, Abe M, Higashi S. Three-dimensional observations of accessory canals in mature and developing rat molar teeth. Acta Anat 1992; 144(3):284. https://doi.org/10.1159/000147239
Zuza EP, Toledo BEC, Hetem S, Spolidório LC, Mendes AJ, Rosetti EP. Prevalence of different types of accessory canals in the furcation area of third molars. J Periodontal 2006; 77(10):1755-61. https://doi.org/10.1902/jop.2006.060112
Bolan M, Rocha MJC. Histopathologic study of physiological and pathological resorptions in human primary teeth. Oral Surg Oral Med Oral Pathol Oral Radio Endod 2007; 104(5):680-5. https://doi.org/10.1016/j.tripleo.2006.11.047
Queiroz AM, Arid J, Nelson-Filho P, Lucisano MP, Silva RAB, Sorgi CA, et al. Correlation between bacterial endotoxin levels in root canals of primary teeth and the periapical lesion area. J Dent Child 2016; 83(1):9-15.
Neelakantan P, Herrera DR, Pecorari VGA, Gomes BPFA. Endotoxin levels after chemomechanical preparation of root canals with sodium hypochlorite or chlorhexidine: a systematic review of clinical trials and meta-analysis. Int Endod J 2019; 52(1):19-27. https://doi.org/10.1111/iej.12963
Kalra N, Sushma K, Mahapatra GK. Changes in developing succedaneous teeth as a consequence of infected deciduous molars. J Indian Soc Pedod Prev Dent 2000; 18(3):90-4.
Guglielmi CA, Müller-Ramalho K, Scaramucci T, da Silva SR, Imparato JC, Pinheiro SL. Evaluation of the furcation area permeability of deciduous molars treated by neodymium:yttrium–aluminum–garnet laser or adhesive. Lasers Med Sci 2010; 25(6):873-80. https://doi.org/10.1007/s10103-009-0730-z
Vargas-Ferreira F, Salas MMS, Nascimento GG, Tarquinio SBC, Jr Faggion CM, Peres MA, et al. Association between developmental defects of enamel and dental caries: A systematic review and meta-analysis. J Dent 2015; 43(6):619-28. https://doi.org/10.1016/j.jdent.2015.03.011
Sidow SJ, West LA, Liewehr FR, Loushine RJ. Root canal morphology of human maxillary and mandibular third molars. J Endod 2000; 26(11):675-8. https://doi.org/10.1097/00004770-200011000-00011
Zhang W, Tang Y, Liu C, Shen Y, Feng X, Gu Y. Root and root canal variations of the human maxillary and mandibular molars in a Chinese population: A micro-computed tomographic study. Arch Oral Bio 2018; 95:134-40. https://doi.org/10.1016/j.archoralbio.2018.07.020
Paras LG, Rapp R, Piesco NP, Zeichner SJ, Zullo TG. An investigation of accessory foramina in furcation areas of primary molars: Part 1 – SEM observations of frequency, size and location of accessory foramina in the internal and external furcation areas. J Clin Pediatr Dent 1993; 17(2):65-9.
Sharma U, Gulati A, Gill N. An investigation of accessory canals in primary molars – an analytical study. Int J Paediatr Dent 2016; 26(2):149-56. https://doi.org/10.1111/ipd.12178
Niemann RW, Dickinson GL, Jackson CR, Wearden S, Skidmore AE. Dye ingress in molars: furcation to chamber floor. J Endod 1993; 19(6):293-6. https://doi.org/10.1016/s0099-2399(06)80459-0
Dammaschke T, Witt M, Ott K, Schafer E. Scanning electron microscopic investigation of incidence, location, and size of accessory foramina in primary and permanent molars. Quintessence Int 2004; 35(9):699-705.
Ozcan G, Sekerci AE, Cantekin K, Aydinbelge M, Dogan S. Evaluation of root canal morphology of human primary molars by using CBCT and comprehensive review of the literature. Acta Odontol Scand 2016; 74(4):250-8. https://doi.org/10.3109/00016357.2015.1104721
Acar B, Kamburoglu K, Tatar I, Arikan V, Çelik HH, Yuksel S, et al. Comparison of micro-computerized tomography and cone-beam computerized tomography in the detection of accessory canals in primary molars. Imaging Sci Dent 2015; 45(4):205-11. https://doi.org/10.5624/isd.2015.45.4.205
Verma P, Love RM. A micro CT study of the mesiobuccal root canal morphology of the maxillary first molar tooth. Int Endod J 2011; 44(3):210-7. https://doi.org/10.1111/j.1365-2591.2010.01800.x
Ahmed HMA, Dummer PMH. A new system for classifying tooth, root and canal anomalies. Int Endod J 2018; 51(4):389-404. https://doi.org/10.1111/iej.12867
Tannure PN, Barcelos R, Portela MB, Gleiser R, Primo LG. Histopathologic and SEM analysis of primary teeth with pulpectomy failure. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2009; 108(1):e29-e33. https://doi.org/10.1016/j.tripleo.2009.03.014
Rocha CT, Rossi MA, Leonardo MR, Rocha LB, Nelson-Filho P, Silva LA. Biofilm on the apical region of roots in primary teeth with vital and necrotic pulps with or without radiographically evident apical pathosis. Int Endod J 2008, 41(8):664-9. https://doi.org/10.1111/j.1365-2591.2008.01411.x
Nair PN. On the causes of persistent apical periodontitis: a review. Int Endod J 2006; 39(4):249-81. https://doi.org/10.1111/j.1365-2591.2006.01099.x
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