Endodontic Management of the Three-Rooted Mandibular First Permanent Molar: a Case Report.
The distal root of the mandibular first permanent molar (MFPM) contains one or two canals. More rarely, the second/third distal canal is found in a separate root in a distolingual (DL) position - a radix entomolaris (RE). In Caucasians, this occurs in less than 4% of cases, but it is equally important to be aware of this possibility. Careful examination of the preoperative periapical radiographs (orthoradial and mesially angled) and inspection of the pulp chamber floor during endodontic management may indicate that this radicular variant is present. RE's lingual inclination and buccolingual curvature must be taken into account during cleaning and shaping of the canal within this root to avoid procedural errors, such as straightening and ledging of the root canal, perforation or instrument fracture. The aim of the present paper was to discuss a case report of a young patient, referred to an endodontic office after a ledge was created by inappropriate instrumentation of a buccolingually curved RE canal.
Department of Dental Diseases and Dental Morphology, Faculty of Medicine, University of Ljubljana Department of Operative Dentistry and Endodontics, University Medical Centre Ljubljana, Ljubljana, Slovenia.
Iztok
I
Štamfelj
anatomical variants; mandibular first permanent molar; radix entomolaris; root canal therapy; supernumerary root
J Endod. 2010 Nov;36(11):1786-9
20951288
Int Endod J. 2009 Nov;42(11):1044-9
19825040
Br Dent J. 1985 Nov 9;159(9):298-9
3864475
J Endod. 2011 Apr;37(4):485-90
21419295
Shika Kiso Igakkai Zasshi. 1989 Feb;31(1):13-8
2519249
Acta Odontol Scand. 1994 Oct;52(5):303-14
7825400
Int Endod J. 2004 Nov;37(11):789-99
15479262
J Endod. 2010 Jun;36(6):990-4
20478452
J Periodontol. 2007 Aug;78(8):1485-90
17668967
J Endod. 2011 Aug;37(8):1063-8
21763895
Int Endod J. 2002 Jan;35(1):56-62
11853239
Community Dent Oral Epidemiol. 1981 Aug;9(4):191-2
6949672
J Endod. 2009 Feb;35(2):202-5
19166773
J Endod. 2009 May;35(5):643-5
19410075
Int Endod J. 2001 Jul;34(5):359-70
11482719
Scand J Dent Res. 1990 Oct;98(5):363-73
2293344
J Endod. 2004 Jan;30(1):5-16
14760900
Community Dent Oral Epidemiol. 1974;2(3):130-1
4528648
J Endod. 2007 Oct;33(10):1155-62
17889681
Int Endod J. 2011 Nov;44(11):990-9
21658074
J Endod. 2009 Apr;35(4):503-7
19345794
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2010 Nov;110(5):e98-e101
20875760
J Dent Res. 1973 Jan-Feb;52(1):181
4509495
J Endod. 2010 Apr;36(4):653-7
20307739
J Endod. 2010 Aug;36(8):1341-6
20647093
Int Endod J. 2006 Dec;39(12):921-30
17180780
Int Endod J. 2012 Nov;45(11):963-78
22681628
Am J Phys Anthropol. 1971 Mar;34(2):229-41
5572604