Second Canal in Mesiobuccal Root of Maxillary Molars Is Correlated with Root Third and Patient Age: A Cone-beam Computed Tomographic Study

Abstract Objective Knowledge of internal anatomy of the teeth is of great importance in endodontics, leading to success in root canal therapy (RCT). The aim of this study was to assess the root anatomy and canal configuration of maxillary molars in a Brazilian subpopulation using tomographic images using a voxel size of 125 μm. Materials and Methods This in vivo retrospective study assessed 651 cone-beam computed tomographic scans from 328 maxillary first molars and 323 maxillary second molars. The images were assessed by two endodontists and an oral radiologist. Only permanent molars with fully developed roots and with no signs of RCT were included. Results Maxillary first and second molars presented three separated roots in 99.39 and 90.09% of the cases, respectively. The presence of mesiolingual canals in the mesiobuccal roots was 64.22% for maxillary first molars and 33.56% for maxillary second molars. Distobuccal canals in the maxillary first and second molars presented Vertucci's Type I configuration in 99.39 and 99.66%, respectively, and palatal canals in the maxillary first and second molars presented Vertucci's Type I configuration in 99.69 and 99.68%, respectively. Maxillary second molars were more subjected to anatomical variations than first molars. Female patients presented higher prevalence of mesiolingual canals in the maxillary second molars. Conclusions The most prevalent morphology in the maxillary first and second molars was three root canals. The presence of only one or two roots is more likely to occur in the maxillary second molars than in the maxillary first molars. Mesiolingual canals in mesiobuccal roots are more frequent in the maxillary first molars than in the maxillary second molars, and the occurrence of two distobuccal or two palatal canals is rare.

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Apical Transportation of Mesiobuccal Canals of Maxillary Molars Following Root Canal Preparation with Two Rotary Systems and Hand Files: A Cone-Beam Computed Tomographic Assessment

Frontiers in Dentistry ◽

10.18502/fid.v14i4.2086 ◽

2019 ◽

Author(s):

Pegah Sarraf ◽

Nazanin Kiomarsi ◽

Farrokh Haj Taheri ◽

Behrang Moghaddamzade ◽

Fatemeh Dibaji ◽

...

Keyword(s):

Root Canal ◽

In Vitro Study ◽

Cone Beam ◽

Root Canal Preparation ◽

Computed Tomographic ◽

Maxillary Molars ◽

Apical Transportation ◽

Significant Difference ◽

Canal Transportation

Objectives: This study aimed to compare the transportation of the mesiobuccal canal of maxillary molars following root canal preparation with HyFlex CM (HCM) and Edge Taper Platinum (ETP) rotary systems and stainless steel (SS) hand files using cone-beam computed tomography (CBCT). Materials and Methods: This in-vitro study was performed on 48 maxillary molars in three groups of 16. The teeth were mounted in acrylic blocks, and root canals were prepared using HCM in group 1 (up to #30/0.06), ETP in group 2 (up to F3/0.06), and SS hand files in group 3 (up to #30). CBCT scans were taken before and after root canal preparation. The amount of canal transportation was measured at 0, 3, 6, and 9mm from the apex. Data were analyzed using Kruskal-Wallis and Mann-Whitney tests. Results: The difference in canal transportation at 0 and 6mm from the apex was significant between the HCM and ETP groups (P=0.031 and 0.023) but none of the systems showed any significant difference with hand files at 0- and 6-mm levels (P=0.10, 0.56, 0.22, and 0.50), respectively. At 3mm from the apex, no significant difference was noted among the groups (P=0.30). At the 9-mm level, the amount of canal transportation was not significantly different between HCM and ETP (P=0.83) but they showed significant differences with hand files (P<0.001). Conclusion: ETP and HCM caused less canal transportation at the curvature of the mesiobuccal canal of maxillary molars compared to hand files. ETP showed superior efficacy in root canal preparation compared to HCM.

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Evaluation of Distolingual Canal/Roots in Mandibular Molars and Mesiobuccal Canals in Maxillary Molars by CBCT

The Open Dentistry Journal ◽

10.2174/1874210601711010360 ◽

2017 ◽

Vol 11 (1) ◽

pp. 360-366 ◽

Cited By ~ 5

Author(s):

Filiz Namdar Pekiner ◽

M. Oğuz Borahan ◽

Asım Dumlu

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

Root Canal Treatment ◽

Cone Beam ◽

Patient Age ◽

Root Canals ◽

Mandibular Molars ◽

Maxillary Molars ◽

Distolingual Canal

Background/Purpose: The objectives of this study were to identify the bilateral distolingual (DL) canals / roots of the mandibular first molars and second mesiobuccal (MB2) canals of the maxillary first molars in the same Turkish individuals using cone-beam computed tomography (CBCT). Materials and Methods: A total of 150 CBCT images including all mandibular and maxillary first molars were retrospectively investigated in a Turkish subpopulation. The patient age, sex and presence of roots and root canals were assessed. The frequency, of bilateral DL canals, DL roots, and MB2 canals were reviewed. Data were analyzed using Fisher’sexact test and Chi-square test. Results: The prevalences of right DL canals, DL roots and MB2 canals were 31.3, 14.0 and 34.7%, respectively. The prevalences of left DL canals, DL roots and MB2 canals were 31.3, 4 and 27.3%, respectively. There was no statistically difference in the frequency of right and left DL canals, DL roots of mandibular first molars and MB2 canals of maxillary first molars according to gender. Conclusion: CBCT is a competent tool for the detection of additional distolingual canals/roots and second mesio buccal canals, and it is a valuable aid for dentists providing root canal treatment.

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Apical Transportation of Mesiobuccal Canals of Maxillary Molars Following Root Canal Preparation with Two Rotary Systems and Hand Files: A Cone-Beam Computed Tomographic Assessment

Frontiers in Dentistry ◽

10.18502/fid.v16i4.2086 ◽

2019 ◽

Author(s):

Pegah Sarraf ◽

Nazanin Kiomarsi ◽

Farrokh Haj Taheri ◽

Behrang Moghaddamzade ◽

Fatemeh Dibaji ◽

...

Keyword(s):

Root Canal ◽

In Vitro Study ◽

Cone Beam ◽

Root Canal Preparation ◽

Computed Tomographic ◽

Maxillary Molars ◽

Apical Transportation ◽

Significant Difference ◽

Canal Transportation

Objectives: This study aimed to compare the transportation of the mesiobuccal canal of maxillary molars following root canal preparation with HyFlex CM (HCM) and Edge Taper Platinum (ETP) rotary systems and stainless steel (SS) hand files using cone-beam computed tomography (CBCT). Materials and Methods: This in-vitro study was performed on 48 maxillary molars in three groups of 16. The teeth were mounted in acrylic blocks, and root canals were prepared using HCM in group 1 (up to #30/0.06), ETP in group 2 (up to F3/0.06), and SS hand files in group 3 (up to #30). CBCT scans were taken before and after root canal preparation. The amount of canal transportation was measured at 0, 3, 6, and 9mm from the apex. Data were analyzed using Kruskal-Wallis and Mann-Whitney tests. Results: The difference in canal transportation at 0 and 6mm from the apex was significant between the HCM and ETP groups (P=0.031 and 0.023) but none of the systems showed any significant difference with hand files at 0- and 6-mm levels (P=0.10, 0.56, 0.22, and 0.50), respectively. At 3mm from the apex, no significant difference was noted among the groups (P=0.30). At the 9-mm level, the amount of canal transportation was not significantly different between HCM and ETP (P=0.83) but they showed significant differences with hand files (P<0.001). Conclusion: ETP and HCM caused less canal transportation at the curvature of the mesiobuccal canal of maxillary molars compared to hand files. ETP showed superior efficacy in root canal preparation compared to HCM.

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Patient Age May Indicate Basal Cell Nevus Syndrome

Skin & Allergy News ◽

10.1016/s0037-6337(06)71526-1 ◽

2006 ◽

Vol 37 (9) ◽

pp. 39

Author(s):

Diana Mahoney

Keyword(s):

Basal Cell ◽

Patient Age ◽

Basal Cell Nevus Syndrome ◽

Patient Âgé

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Researchers examine the influence of hospital surgery volume, procedure type, and patient age on surgical risk

PsycEXTRA Dataset ◽

10.1037/e556652006-011 ◽

2002 ◽

Keyword(s):

Patient Age ◽

Surgical Risk ◽

Patient Âgé ◽

Procedure Type

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Gestion orthopédique d’une ankylose de l’ATM chez l’enfant

Revue d Orthopédie Dento-Faciale ◽

10.1051/odf/2020041 ◽

2020 ◽

Vol 54 (4) ◽

pp. 407-418

Author(s):

Pamela Villalon-Pooley ◽

Camila Hernandez-Veliz ◽

Maria Fernanda Pinto-Chavez ◽

Pierre Bourdiol

Keyword(s):

Patient Age ◽

Patient Âgé

Parmi les fractures cranio-faciales, celles affectant le condyle mandibulaire font partie des fractures les plus souvent rencontrées chez le patient en âge pédiatrique. L’évolution sans traitement peut produire une ankylose temporo-mandibulaire entraînant troubles fonctionnels et asymétrie de la croissance cranio-faciale. Le traitement traditionnellement chirurgical est d’un pronostic généralement réservé. Dans cet article est présenté le cas d’un patient, âgé de quatre ans, atteint d’ankylose fibreuse de l’articulation temporo-mandibulaire gauche, suite probable d’une fracture du col du condyle non-diagnostiquée. La libération fonctionnelle de la fibro-ankylose articulaire a été l’objectif de la première étape thérapeutique. Celle-ci a été suivie, à l’âge de sept ans, d’une distraction articulaire obtenue au moyen de butées occlusales controlatérales disposées côté droit. Ceci a produit un ajustement de la croissance dento-alvéolaire assurant à la fois un rattrapage du déficit de croissance unilatéral de départ et une néoformation condylienne par remodelage de l’articulation temporo-mandibulaire gauche. Quatre années après la mise en route de la phase orthopédique initiale, la fonction articulaire restaurée et l’équilibre facial obtenu restent stables chez ce jeune patient

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