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BMC Oral Health

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Open Access 01-12-2023 | Research

Root and canal anatomy of mandibular first molars using micro-computed tomography: a systematic review

Authors: Hasan M. AL-Rammahi, Wen Lin Chai, Mohamed Shady Nabhan, Hany M. A. Ahmed

Published in: BMC Oral Health | Issue 1/2023

Abstract

Background

A thorough understanding of root and canal anatomy is crucial for successful root canal treatment outcomes. This systematic review aims to explore the published micro-CT studies investigated the anatomy of root and canal system in permanent mandibular first molars.

Method

An electronic search was performed on Web of science, PubMed, and Scopus. Micro-CT journal studies investigated the root and canal anatomy of permanent double-rooted mandibular first molars were included. Data on study characteristics, objectives of interest, specifications of the studies, and micro-CT specifications were extracted. Risk of bias assessment (ROB) of the included studies was performed using Anatomical Quality Assessment (AQUA) tool. The extracted data were presented in tables and figures to present and synthesise the results. A meta-analysis was performed for the studies related to the prevalence of Vertucci's canal configurations, middle mesial canal (MMC) configurations, and Fan's isthmus types.

Results

Amongst 1358 identified studies, thirty met the inclusion criteria. In terms of the objectives, the selected studies showed high anatomical variability in mandibular first molars. Twenty-two (73%), 25 (83%), and 12 (40%) of the studies reported the population/ethnicity, micro-CT specifications, and ethical approval, respectively. 28 (93%) studies did not disclose the method of sample size estimation. In only 6 (20%) of the studies, the authors had calibrated the assessment approaches. Mostly, a potential ROB was reported in domain 1 (objective(s) and subject characteristics) and domain 3 (methodology characterization). Whilst, low risk was reported in domains 2 (study design), 4 (descriptive anatomy), and 5 (reporting of results). The overall ROB was reported to be ''moderate'' in the vast majority of the studies (27/30). Meta-analysis results showed high levels of heterogeneity among the studies related to MMCs (I² = 86%) and Fan's isthmus (I² = 87%). As for the root canal configuration, pooled prevalence showed that Vertucci type IV and type I were the most prevalent in mesial and distal root canals, respectively.

Conclusion

Based on moderate risk of bias level of evidence, micro-CT studies have shown wide range of qualitative and quantitative data presentations of the roots and canals in mandibular first molars.

Protocol and registration.

The protocol of this systematic review was prospectively registered in the Open Science Framework database (https://osf.io) on 2022–06-20 with the registration number 10.17605/OSF.IO/EZP7K.

Vertucci FJ. Root canal anatomy of the human permanent teeth. Oral Surg Oral Med Oral Pathol. 1984;58(5):589–99.PubMedCrossRef

Weine FS, Healey HJ, Gerstein H, Evanson L. Canal configuration in the mesiobuccal root of the maxillary first molar and its endodontic significance. Oral Surg Oral Med Oral Pathol. 1969;28(3):419–25.PubMedCrossRef

Briseño-Marroquín B, Paqué F, Maier K, Willershausen B, Wolf TG. Root canal morphology and configuration of 179 maxillary first molars by means of micro–computed tomography: an ex vivo study. J Endodontics. 2015;41(12):2008–13.CrossRef

Tomaszewska IM, Skinningsrud B, Jarzębska A, Pękala JR, Tarasiuk J, Iwanaga J. Internal and external morphology of mandibular molars: An original micro-CT study and meta-analysis with review of implications for endodontic therapy. Clin Anat. 2018;31(6):797–811.PubMedCrossRef

Filpo-Perez C, Bramante CM, Villas-Boas MH, Húngaro Duarte MA, Versiani MA, Ordinola-Zapata R. Micro-computed tomographic analysis of the root canal morphology of the distal root of mandibular first molar. J Endod. 2015;41(2):231–6.PubMedCrossRef

Alkaabi W, AlShwaimi E, Farooq I, Goodis HE, Chogle SM. A micro-computed tomography study of the root canal morphology of mandibular first premolars in an Emirati population. Med Princ Pract. 2017;26(2):118–24.PubMedCrossRef

Marceliano-Alves MF, Lima CO, Bastos LGDPMN, Bruno AMV, Vidaurre F, Coutinho TM, et al. Mandibular mesial root canal morphology using micro-computed tomography in a Brazilian population. Aust Endod J. 2019;45(1):51–6.PubMedCrossRef

Pham KV, Le AHL. Evaluation of Roots and Canal Systems of Mandibular First Molars in a Vietnamese Subpopulation Using Cone-Beam Computed Tomography. J Int Soc Prev Community Dent. 2019;9(4):356–62.PubMedPubMedCentralCrossRef

Munavalli A, Kambale S, Ramesh S, Ajgaonkar N. Mandibular first molar with single root and single root canal. J Conservative Dent. 2015;18(4):346–8.

10.

Kottoor J, Albuquerque DV, Velmurugan N, Sumitha M. Four-rooted mandibular first molar with an unusual developmental root fusion line: a case report. Case Rep Dent. 2012;201:2373022.

11.

De-Deus G, Rodrigues EA, Lee JK, Kim J, da Silva EJNL, Belladonna FG, et al. Root groove depth and inter-orifice canal distance as anatomical predictive factors for danger zone in the mesial root of mandibular first molars. Clin Oral Invest. 2021;25(6):3641–9.CrossRef

12.

Gu Y, Lu Q, Wang H, Ding Y, Wang P, Ni L. Root canal morphology of permanent three-rooted mandibular first molars–part I: pulp floor and root canal system. J Endod. 2010;36(6):990–4.PubMedCrossRef

13.

Wang Y, Zheng Q-H, Zhou X-D, Tang L, Wang Q, Zheng G-N, et al. Evaluation of the root and canal morphology of mandibular first permanent molars in a western Chinese population by cone-beam computed tomography. J Endod. 2010;36(11):1786–9.PubMedCrossRef

14.

Rodrigues CT, de Oliveira-Santos C, Bernardineli N, Duarte MAH, Bramante CM, Minotti-Bonfante PG, et al. Prevalence and morphometric analysis of three-rooted mandibular first molars in a Brazilian subpopulation. J Appl Oral Sci. 2016;24(5):535–42.PubMedPubMedCentralCrossRef

15.

Zhang R, Wang H, Tian YY, Yu X, Hu T, Dummer PMH. Use of cone-beam computed tomography to evaluate root and canal morphology of mandibular molars in Chinese individuals. Int Endod J. 2011;44(11):990–9.PubMedCrossRef

16.

Caputo BV, Noro Filho GA, de Andrade Salgado DM, Moura-Netto C, Giovani EM, 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(11):1604–7.PubMedCrossRef

17.

Linden D, Boone M, De Bruyne M, De Moor R, Versiani MA, Meire M. Adjunctive Steps for the Removal of Hard Tissue Debris from the Anatomic Complexities of the Mesial Root Canal System of Mandibular Molars: A Micro-Computed Tomographic Study. J Endod. 2020;46(10):1508–14.PubMedCrossRef

18.

Pacheco-Yanes J, Provenzano JC, Marceliano-Alves MF, Gazzaneo I, Perez AR, Goncalves LS, et al. Distribution of sodium hypochlorite throughout the mesial root canal system of mandibular molars after adjunctive irrigant activation procedures: a micro-computed tomographic study. Clin Oral Invest. 2020;24(2):907–14.CrossRef

19.

Barreto MS, da Rosa RA, Santini MF, Cavenago BC, Duarte MAH, Bier CAS, et al. Efficacy of ultrasonic activation of NaOCl and orange oil in removing filling material from mesial canals of mandibular molars with and without isthmus. J Appl Oral Sci. 2016;24(1):37–44.PubMedPubMedCentralCrossRef

20.

Campello AF, Almeida BM, Franzoni MA, Alves FRF, Marceliano-Alves MF, Rocas IN, et al. Influence of solvent and a supplementary step with a finishing instrument on filling material removal from canals connected by an isthmus. Int Endod J. 2019;52(5):716–24.PubMedCrossRef

21.

Faisal I, Saif R, Alsulaiman M, Natto ZS. Shaping ability of 2Shape and NeoNiTi rotary instruments in preparation of curved canals using micro-computed tomography. BMC Oral Health. 2021;21(1):1–11.CrossRef

22.

Versiani MA, Ordinola-Zapata R, Keleş A, Alcin H, Bramante CM, Pécora JD, et al. Middle mesial canals in mandibular first molars: a micro-CT study in different populations. Arch Oral Biol. 2016;61:130–7.PubMedCrossRef

23.

de Pablo ÓV, Estevez R, Sánchez MP, Heilborn C, Cohenca N. Root anatomy and canal configuration of the permanent mandibular first molar: a systematic review. J Endod. 2010;36(12):1919–31.PubMedCrossRef

24.

Keleş A, Keskin C, Alqawasmi R, Versiani MA. Micro-computed tomographic analysis of the mesial root of mandibular first molars with bifid apex. Arch Oral Biol. 2020;117:104792.PubMedCrossRef

25.

Azim AA, Deutsch AS, Solomon CS. Prevalence of middle mesial canals in mandibular molars after guided troughing under high magnification: an in vivo investigation. J Endod. 2015;41(2):164–8.PubMedCrossRef

26.

Keleş A, Keskin C. Detectability of middle mesial root canal orifices by troughing technique in mandibular molars: a micro–computed tomographic study. J Endod. 2017;43(8):1329–31.PubMedCrossRef

27.

Yoshino K, Ito K, Kuroda M, Sugihara N. Prevalence of vertical root fracture as the reason for tooth extraction in dental clinics. Clin Oral Invest. 2015;19:1405–9.CrossRef

28.

Chan C-P, Lin C-P, Tseng S-C, Jeng J-H. Vertical root fracture in endodontically versus nonendodontically treated teethA survey of 315 cases in Chinese patients. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 1999;87(4):504–7.PubMedCrossRef

29.

Skidmore AE, Bjorndal AM. Root canal morphology of the human mandibular first molar. Oral Surg Oral Med Oral Pathol. 1971;32(5):778–84.PubMedCrossRef

30.

Pineda F, Kuttler Y. Mesiodistal and buccolingual roentgenographic investigation of 7,275 root canals. Oral Surg Oral Med Oral Pathol. 1972;33(1):101–10.PubMedCrossRef

31.

Madjapa HS, Minja IK. Root canal morphology of native Tanzanian permanent mandibular molar teeth. Pan Afr Med J. 2018;31:24.PubMedPubMedCentralCrossRef

32.

Ahmed HA, Abu-Bakr N, Yahia N, Ibrahim Y. Root and canal morphology of permanent mandibular molars in a Sudanese population. Int Endod J. 2007;40(10):766–71.PubMedCrossRef

33.

Forner Navarro L, Luzi A, Almenar García A, Hervás García A. Third canal in the mesial root of permanent mandibular first molars: review of the literature and presentation of 3 clinical reports and 2 in vitro studies. Med Oral Patol Oral y Cir Bucal. 2007;12(8):605–9.

34.

Sperber G, Moreau J. Study of the number of roots and canals in Senegalese first permanent mandibular molars. Int Endod J. 1998;31(2):117–22.PubMedCrossRef

35.

Abarca J, Duran M, Parra D, Steinfort K, Zaror C, Monardes H. Root morphology of mandibular molars: a cone-beam computed tomography study. Folia Morphol. 2020;79(2):327–32.CrossRef

36.

Fu Y, Gao Y, Gao Y, Tan X, Zhang L, Huang D. Three-dimensional analysis of coronal root canal morphology of 136 permanent mandibular first molars by micro-computed tomography. Journal of Dental Sciences. 2021;17(1):482-9.

37.

Aksoy U, Küçük M, Versiani M, Orhan K. Publication trends in micro-CT endodontic research: a bibliometric analysis over a 25-year period. Int Endod J. 2021;54(3):343–53.PubMedCrossRef

38.

Szabo BT, Pataky L, Mikusi R, Fejerdy P, Dobo-Nagy C. Comparative evaluation of cone-beam CT equipment with micro-CT in the visualization of root canal system. Ann Ist Super Sanita. 2012;48:49–52.PubMed

39.

Marca C, Dummer PM, Bryant S, Vier-Pelisser FV, Só MVR, Fontanella V, et al. Three-rooted premolar analyzed by high-resolution and cone beam CT. Clin Oral Invest. 2013;17(6):1535–40.CrossRef

40.

Ordinola-Zapata R, Bramante CM, Versiani MA, Moldauer BI, Topham G, Gutmann JL, et al. Comparative accuracy of the Clearing Technique, CBCT and Micro-CT methods in studying the mesial root canal configuration of mandibular first molars. Int Endod J. 2017;50(1):90–6.PubMedCrossRef

41.

Zhang D, Chen J, Lan G, Li M, An J, Wen X, et al. The root canal morphology in mandibular first premolars: a comparative evaluation of cone-beam computed tomography and micro-computed tomography. Clin Oral Invest. 2017;21(4):1007–12.CrossRef

42.

Nascimento EHL, Elias MRA, Vasconcelos VHF, Haiter-Neto F, Mendonça EF, Sousa TO. Ex Vivo Detection of Apical Delta in Premolars: A Comparative Study Using Periapical Radiography, Cone-beam Computed Tomography, and Micro–computed Tomography. J Endod. 2019;45(5):549–53.PubMedCrossRef

43.

Qiao X, Xu T, Chen L, Yang D. Analysis of Root Canal Curvature and Root Canal Morphology of Maxillary Posterior Teeth in Guizhou, China. Med Sci Monit. 2021;27:e928758–61.PubMedPubMedCentralCrossRef

44.

Rashed B, Iino Y, Komatsu K, Nishijo M, Hanada T, Ebihara A, et al. Evaluation of root canal anatomy of maxillary premolars using swept-source optical coherence tomography in comparison with dental operating microscope and cone beam computed tomography. Photomed Laser Surg. 2018;36(9):487–92.PubMedCrossRef

45.

Kim Y, Perinpanayagam H, Lee J-K, Yoo Y-J, Oh S, Gu Y, et al. Comparison of mandibular first molar mesial root canal morphology using micro-computed tomography and clearing technique. Acta Odontol Scand. 2015;73(6):427–32.PubMedCrossRef

46.

Ahmed HMA, Rossi-Fedele G. Preferred Reporting Items for Root and Canal Anatomy in the Human Dentition (PROUD 2020)–A Systematic Review and a Proposal for a Standardized Protocol. Eur Endod J. 2020;5(3):159–76.PubMedPubMedCentral

47.

Mannocci F, Peru M, Sherriff M, Cook R, Ford TRP. The isthmuses of the mesial root of mandibular molars: a micro-computed tomographic study. Int Endod J. 2005;38(8):558–63.PubMedCrossRef

48.

Iwaka Y. Three-Dimensional Observation of the Pulp Cavity of Mandibular First Molars by Micro-CT. J Oral Biosci. 2006;48(2):94–102.CrossRef

49.

Gu L, Wei X, Ling J, Huang X. A microcomputed tomographic study of canal isthmuses in the mesial root of mandibular first molars in a Chinese population. J Endod. 2009;35(3):353–6.PubMedCrossRef

50.

Gu Y, Lu Q, Wang P, Ni L. Root canal morphology of permanent three-rooted mandibular first molars: Part II - Measurement of root canal curvatures. J Endod. 2010;36(8):1341–6.PubMedCrossRef

51.

Fan B, Pan Y, Gao Y, Fang F, Wu Q, Gutmann JL. Three-dimensional morphologic analysis of isthmuses in the mesial roots of mandibular molars. J Endod. 2010;36(11):1866–9.PubMedCrossRef

52.

Harris SP, Bowles WR, Fok A, McClanahan SB. An anatomic investigation of the mandibular first molar using micro-computed tomography. J Endod. 2013;39(11):1374–8.PubMedCrossRef

53.

Lamia AF, McDonald NJ. Microcomputed tomographic evaluation of mandibular molars with single distal canals. Gen Dent. 2015;63(5):33–7.PubMed

54.

Lee JK, Yoo YJ, Perinpanayagam H, Ha BH, Lim SM, Oh SR, et al. Three-dimensional modelling and concurrent measurements of root anatomy in mandibular first molar mesial roots using micro-computed tomography. Int Endod J. 2015;48(4):380–9.PubMedCrossRef

55.

Gu Y, Tang Y, Zhu Q, Feng X. Measurement of root surface area of permanent teeth with root variations in a Chinese population - A micro-CT analysis. Arch Oral Biol. 2016;63:75–81.PubMedCrossRef

56.

Versiani MA, Ahmed HM, Sousa-Neto MD, De-Deus G, Dummer PM. Unusual Deviation of the Main Foramen from the Root Apex. Braz Dent J. 2016;27(5):589–91.PubMedCrossRef

57.

Wolf TG, Paque F, Zeller M, Willershausen B, Briseno-Marroquin B. Root Canal Morphology and Configuration of 118 Mandibular First Molars by Means of Micro-Computed Tomography: An Ex Vivo Study. J Endod. 2016;42(4):610–4.PubMedCrossRef

58.

Gu Y, Zhu Q, Tang Y, Zhang Y, Feng X. Measurement of root surface area of permanent teeth in a Chinese population. Arch Oral Biol. 2017;81:26–30.PubMedCrossRef

59.

Keleş A, Keskin C. Apical Root Canal Morphology of Mesial Roots of Mandibular First Molar Teeth with Vertucci Type II Configuration by Means of Micro-Computed Tomography. J Endod. 2017;43(3):481–5.PubMedCrossRef

60.

Maung Maung Kyaw M, Ha JH, Jin MU, Kim YK, Kim SK. Anatomical profile of the mesial root of the Burmese mandibular first molar with Vertucci’s type IV canal configuration. J Oral Sci. 2017;59(4):469–74.CrossRef

61.

Wolf TG, Paqué F, Sven Patyna M, Willershausen B, Briseño-Marroquín B. Three-dimensional analysis of the physiological foramen geometry of maxillary and mandibular molars by means of micro-CT. Int J Oral Sci. 2017;9(3):151–7.PubMedPubMedCentralCrossRef

62.

Keleş A, Keskin C. A micro-computed tomographic study of band-shaped root canal isthmuses, having their floor in the apical third of mesial roots of mandibular first molars. Int Endod J. 2018;51(2):240–6.PubMedCrossRef

63.

Keles A, Keskin C. Deviations of Mesial Root Canals of Mandibular First Molar Teeth at the Apical Third: A Micro-computed Tomographic Study. J Endod. 2018;44(6):1030–2.PubMedCrossRef

64.

Theye CEG, Hattingh A, Cracknell TJ, Oettlé AC, Steyn M, Vandeweghe S. Dento-alveolar measurements and histomorphometric parameters of maxillary and mandibular first molars, using micro-CT. Clin Implant Dent Relat Res. 2018;20(4):550–61.PubMedCrossRef

65.

Arfianti RP, Artiningsih D, Nazar K. Variations in the Cross-Sectional Shape of the Apical Thirds of the Root Canals in Maxillary and Mandibular Teeth. Pesquisa Brasileira Em Odontopediatria E Clinica Integrada. 2020;20:e5696.

66.

Asijavičienė U, Drukteinis S, Suduiko A. Microcomputed tomography evaluation of the root canals morphology of the mandibular first molars. Stomatologija. 2020;22(3):75–9.PubMed

67.

Mazzi-Chaves JF, Silva-Sousa YTC, Leoni GB, Silva-Sousa AC, Estrela L, Estrela C, et al. Micro-computed tomographic assessment of the variability and morphological features of root canal system and their ramifications. J Appl Oral Sci. 2020;28:e20190393.PubMedPubMedCentralCrossRef

68.

Henry BM, Tomaszewski KA, Ramakrishnan PK, Roy J, Vikse J, Loukas M, et al. Development of the anatomical quality assessment (AQUA) tool for the quality assessment of anatomical studies included in meta-analyses and systematic reviews. Clin Anat. 2017;30(1):6–13.PubMedCrossRef

69.

Borges CC, Estrela C, Decurcio DdA, PÉcora JD, Sousa-Neto MD, Rossi-Fedele G. Cone-beam and micro-computed tomography for the assessment of root canal morphology: a systematic review. Braz Oral Res. 2020;3:0e564.

70.

Villas-Bôas MH, Bernardineli N, Cavenago BC, Marciano M, del Carpio-Perochena A, De Moraes IG, et al. Micro–computed tomography study of the internal anatomy of mesial root canals of mandibular molars. J Endod. 2011;37(12):1682–6.PubMedCrossRef

71.

De-Deus G, Rodrigues EA, Belladonna FG, Simões-Carvalho M, Cavalcante DM, Oliveira DS, et al. Anatomical danger zone reconsidered: a micro-CT study on dentine thickness in mandibular molars. Int Endod J. 2019;52(10):1501–7.PubMedCrossRef

72.

Lobo NS, Wanderley VA, Nejaim Y, Gomes AF, Zaia AA. Assessment of Ramifications in the Apical Region of Root Canals: A Micro-CT Study in a Brazilian Population. Braz Dent J. 2020;31(5):505–10.PubMedCrossRef

73.

Alashiry MK, Zeitoun R, Elashiry MM. Prevalence of middle mesial and middle distal canals in mandibular molars in an Egyptian subpopulation using micro-computed tomography. Niger J Clin Pract. 2020;23(4):534–8.PubMed

74.

Abou-Rass M, Frank AL, Glick DH. The anticurvature filing method to prepare the curved root canal. J Am Dent Assoc (1939). 1980;101(5):792–4.CrossRef

75.

Ahmed HMA, Neelakantan P, Dummer P. A new system for classifying accessory canal morphology. Int Endod J. 2018;51(2):164–76.PubMedCrossRef

76.

Ahmed H, Versiani M, De-Deus G, Dummer P. A new system for classifying root and root canal morphology. Int Endod J. 2017;50(8):761–70.PubMedCrossRef

77.

Alenezi DJ, Al Nazhan SA, Al Maflehi N, Soman C. Root and Canal Morphology of Mandibular Premolar Teeth in a Kuwaiti Subpopulation: A CBCT Clinical Study. Eur Endod J. 2020;5(3):248–56.PubMedPubMedCentral

78.

Peiris HR, Pitakotuwage TN, Takahashi M, Sasaki K, Kanazawa E. Root canal morphology of mandibular permanent molars at different ages. Int Endod J. 2008;41(10):828–35.PubMedCrossRef

79.

Pomeranz HH, Eidelman DL, Goldberg MG. Treatment considerations of the middle mesial canal of mandibular first and second molars. J Endod. 1981;7(12):565–8.PubMedCrossRef

80.

Weller RN, Niemczyk SP, Kim S. Incidence and position of the canal isthmus. Part 1. Mesiobuccal root of the maxillary first molar. J Endod. 1995;21(7):380–3.PubMedCrossRef

81.

Hsu Y-Y, Kim S. The resected root surface. The issue of canal isthmuses. Dent Clin North Am. 1997;41(3):529–40.PubMedCrossRef

82.

Bürklein S, Heck R, Schäfer E. Evaluation of the root canal anatomy of maxillary and mandibular premolars in a selected German population using cone-beam computed tomographic data. J Endod. 2017;43(9):1448–52.PubMedCrossRef

83.

Ahmed HMA. A critical analysis of laboratory and clinical research methods to study root and canal anatomy. Int Endod J. 2022;55:229–80.PubMedCrossRef

84.

Nayak BK. Understanding the relevance of sample size calculation. Indian J Ophthalmol. 2010;58(6):469.PubMedPubMedCentralCrossRef

85.

Tolentino ES, Amoroso-Silva PA, Alcalde MP, Honório HM, Iwaki LCV, Rubira-Bullen IRF, et al. Limitation of diagnostic value of cone-beam CT in detecting apical root isthmuses. J Appl Oral Sci. 2020;28:e20190168.PubMedPubMedCentralCrossRef

86.

Meder-Cowherd L, Williamson AE, Johnson WT, Vasilescu D, Walton R, Qian F. Apical morphology of the palatal roots of maxillary molars by using micro–computed tomography. J Endod. 2011;37(8):1162–5.PubMedCrossRef

87.

Citterio F, Pellegatta A, Citterio CL, Maddalone M. Analysis of the apical constriction using micro-computed tomography and anatomical sections. G Ital Endod. 2014;28(1):41–5.CrossRef

88.

Paqué F, Balmer M, Attin T, Peters OA. Preparation of oval-shaped root canals in mandibular molars using nickel-titanium rotary instruments: a micro-computed tomography study. J Endod. 2010;36(4):703–7.PubMedCrossRef

89.

Nagendrababu V, Kishen A, Chong B, Priya E, Duncan H, Rôças I. Preferred Reporting Items for study Designs in Endodontology (PRIDE): guiding authors to identify and correct reporting deficiencies in their manuscripts prior to peer review. Int Endod J. 2020;53(5):589–90.PubMedCrossRef

90.

Karobari MI, Noorani TY, Halim MS, Ahmed HMA. Root and canal morphology of the anterior permanent dentition in Malaysian population using two classification systems: A CBCT clinical study. Australian Endodontic Journal. 2020.

91.

Ahmed HMA, Dummer PMH. A new system for classifying tooth, root and canal anomalies. Int Endod J. 2018;51(4):389–404.PubMedCrossRef

92.

Hartling L, Featherstone R, Nuspl M, Shave K, Dryden DM, Vandermeer B. Grey literature in systematic reviews: a cross-sectional study of the contribution of non-English reports, unpublished studies and dissertations to the results of meta-analyses in child-relevant reviews. BMC Med Res Methodol. 2017;17(1):64.PubMedPubMedCentralCrossRef

Title: Root and canal anatomy of mandibular first molars using micro-computed tomography: a systematic review
Authors: Hasan M. AL-Rammahi
Wen Lin Chai
Mohamed Shady Nabhan
Hany M. A. Ahmed
Publication date: 01-12-2023
Publisher: BioMed Central
Published in: BMC Oral Health / Issue 1/2023
Electronic ISSN: 1472-6831
DOI: https://doi.org/10.1186/s12903-023-03036-5

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Root and canal anatomy of mandibular first molars using micro-computed tomography: a systematic review

Abstract

Background

Method

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Method

Results

Conclusion

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