Frequency of middle mesial canal and radix entomolaris in mandibular first molars by cone beam computed tomography in a selected Iranian population
Introduction: Although there are many studies about the internal anatomy of mandibular molars, there is still controversy over the frequency of middle mesial canals and isthmuses in the mesial root of mandibular molars and distolingual third root (Radix entomolaris) that it can be seen in any popul...
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doaj-b8d4421c7bac4982ac77336abc4044872020-11-25T03:42:29ZengBabol University of Medical SciencesCaspian journal of dental research2251-98902322-23952020-09-01926370Frequency of middle mesial canal and radix entomolaris in mandibular first molars by cone beam computed tomography in a selected Iranian populationSomaye Hosseini0Ali Soleymani1Ehsan Moudi2Tasnim Bagheri3Hemmat Gholinia4 , Student Research Committee, Babol University of Medical Sciences, Babol, IR Iran. ,Oral Health Research Center, Health Research Institute, Babol University of Medical Sciences,Babol, IR Iran. ,Dental Materials Research Center, Health Research Institute, Babol University of Medical Sciences,Babol, IR Iran. ,Oral Health Research Center, Health Research Institute, Babol University of Medical Sciences,Babol, IR Iran. ,Health Research Institute, Babol University of Medical Sciences, Babol, IR Iran. Introduction: Although there are many studies about the internal anatomy of mandibular molars, there is still controversy over the frequency of middle mesial canals and isthmuses in the mesial root of mandibular molars and distolingual third root (Radix entomolaris) that it can be seen in any population, but it is more frequent in Asians and makes endodontic treatment difficult. Because of limited studies on the middle mesial canal, isthmus in north of Iran; therefore, the aim of this study was to investigate the frequency of these variations in the north of country. Materials & Methods: In this retrospective cross-sectional study, The cone beam computed tomography (CBCT) images of 200 mandibular first molar teeth without any root canal treatment and completely erupted and developed were evaluated. Samples with open apex, internal root resorption, calcification, crown and extensive restoration were excluded. The patients’ gender, age, tooth location (left and right), count of canals in the mesial root, presence or absence of isthmus in mesial root, middle mesial canal and isthmus level in the mesial root and distolingual root (Radix entomolaris) were studied in three groups based on age; <20, 20-40 and >40. Results: From 200 samples, 18 teeth (9%) had middle mesial canal, 38 teeth (19%) had isthmus in mesial root and 6 teeth (3%) had distolingual root (Radix entomolaris). Conclusion: due to the high frequency of isthmuses, middle mesial canals and Radix entomolaris in the population, which cannot be ignored, missing and treating these spaces could be one of the main reasons for failure in root canal treatment. Therefore, it is advised to put more effort into detecting and completely clean and obturate these spaces in surgical and non-surgical endodontic treatments.http://cjdr.ir/article-1-299-en.htmltoothroot canal therapycone beam computed tomography |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Somaye Hosseini Ali Soleymani Ehsan Moudi Tasnim Bagheri Hemmat Gholinia |
spellingShingle |
Somaye Hosseini Ali Soleymani Ehsan Moudi Tasnim Bagheri Hemmat Gholinia Frequency of middle mesial canal and radix entomolaris in mandibular first molars by cone beam computed tomography in a selected Iranian population Caspian journal of dental research tooth root canal therapy cone beam computed tomography |
author_facet |
Somaye Hosseini Ali Soleymani Ehsan Moudi Tasnim Bagheri Hemmat Gholinia |
author_sort |
Somaye Hosseini |
title |
Frequency of middle mesial canal and radix entomolaris in mandibular first molars by cone beam computed tomography in a selected Iranian population |
title_short |
Frequency of middle mesial canal and radix entomolaris in mandibular first molars by cone beam computed tomography in a selected Iranian population |
title_full |
Frequency of middle mesial canal and radix entomolaris in mandibular first molars by cone beam computed tomography in a selected Iranian population |
title_fullStr |
Frequency of middle mesial canal and radix entomolaris in mandibular first molars by cone beam computed tomography in a selected Iranian population |
title_full_unstemmed |
Frequency of middle mesial canal and radix entomolaris in mandibular first molars by cone beam computed tomography in a selected Iranian population |
title_sort |
frequency of middle mesial canal and radix entomolaris in mandibular first molars by cone beam computed tomography in a selected iranian population |
publisher |
Babol University of Medical Sciences |
series |
Caspian journal of dental research |
issn |
2251-9890 2322-2395 |
publishDate |
2020-09-01 |
description |
Introduction: Although there are many studies about the internal anatomy of mandibular molars, there is still controversy over the frequency of middle mesial canals and isthmuses in the mesial root of mandibular molars and distolingual third root (Radix entomolaris) that it can be seen in any population, but it is more frequent in Asians and makes endodontic treatment difficult. Because of limited studies on the middle mesial canal, isthmus in north of Iran; therefore, the aim of this study was to investigate the frequency of these variations in the north of country.
Materials & Methods: In this retrospective cross-sectional study, The cone beam computed tomography (CBCT) images of 200 mandibular first molar teeth without any root canal treatment and completely erupted and developed were evaluated. Samples with open apex, internal root resorption, calcification, crown and extensive restoration were excluded. The patients’ gender, age, tooth location (left and right), count of canals in the mesial root, presence or absence of isthmus in mesial root, middle mesial canal and isthmus level in the mesial root and distolingual root (Radix entomolaris) were studied in three groups based on age; <20, 20-40 and >40.
Results: From 200 samples, 18 teeth (9%) had middle mesial canal, 38 teeth (19%) had isthmus in mesial root and 6 teeth (3%) had distolingual root (Radix entomolaris).
Conclusion: due to the high frequency of isthmuses, middle mesial canals and Radix entomolaris in the population, which cannot be ignored, missing and treating these spaces could be one of the main reasons for failure in root canal treatment. Therefore, it is advised to put more effort into detecting and completely clean and obturate these spaces in surgical and non-surgical endodontic treatments. |
topic |
tooth root canal therapy cone beam computed tomography |
url |
http://cjdr.ir/article-1-299-en.html |
work_keys_str_mv |
AT somayehosseini frequencyofmiddlemesialcanalandradixentomolarisinmandibularfirstmolarsbyconebeamcomputedtomographyinaselectediranianpopulation AT alisoleymani frequencyofmiddlemesialcanalandradixentomolarisinmandibularfirstmolarsbyconebeamcomputedtomographyinaselectediranianpopulation AT ehsanmoudi frequencyofmiddlemesialcanalandradixentomolarisinmandibularfirstmolarsbyconebeamcomputedtomographyinaselectediranianpopulation AT tasnimbagheri frequencyofmiddlemesialcanalandradixentomolarisinmandibularfirstmolarsbyconebeamcomputedtomographyinaselectediranianpopulation AT hemmatgholinia frequencyofmiddlemesialcanalandradixentomolarisinmandibularfirstmolarsbyconebeamcomputedtomographyinaselectediranianpopulation |
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