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Investigation of the root canal configuration of mandibular first molars in a Taiwan Chinese population.

Abstract：

AIM:To investigate the root form and canal morphology of mandibular first molar teeth in a Taiwan Chinese population. METHODOLOGY:A total of 183 mandibular first molars were collected and examined visually through a dissecting microscope after rendering the teeth transparent. The number of roots, number of canals and canal configuration were recorded. The root canal morphology was categorized and compared according to Vertucci (1984). RESULTS:Overall 46% of the mandibular first molars had four canals and 20% had extra-distal roots (distolingual root). In addition, 97% of the specimens had two mesial canals and 46% had two distal canals. In total, 68% of teeth with two mesial canals had two separated apical foramina, and 33% of teeth with two distal canals had two apical foramina. The most common canal configurations (Vertucci, 1984) of mesial roots were type 4 (46%) and type 2 (23%). Type 1 was encountered in 54% of the distal roots. CONCLUSIONS:The frequency of the extra-distal root on the mandibular first molar was 20%, and the incidence of three canals (Vertucci's type 8 classification) with separate apical foramina at the apex of the mesial root was 6%. The three-rooted variation of the mandibular first molar appears to be a genetic characteristic of an Asiatic racial background.

journal_name

Int Endod J

journal_title

International endodontic journal

authors

Chen G,Yao H,Tong C

doi

10.1111/j.1365-2591.2009.01619.x

subject

Has Abstract

pub_date

2009-11-01 00:00:00

pages

1044-9

issue

11

eissn

0143-2885

issn

1365-2591

pii

IEJ1619

journal_volume

42

pub_type

杂志文章

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