Factors affecting the negotiability of second mesiobuccal canals in maxillary molars

Ibarrola, Jose L.; Knowles, Kenneth I.; Ludlow, Marvin O.; McKinley, I. Blake

doi:10.1016/s0099-2399(97)80054-4

Cited by 57 publications

(49 citation statements)

References 10 publications

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“…The presence of a second (mesiobuccal (MB)) (MB2) canal in the MB root of the maxillary molars has been the subject of many discussions and studies (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14). Hess and Zurcher's (1) landmark study in 1925 showed the mesial root of the lower first molar, and the MB root of the upper molars had the most ramifications of any teeth.…”

mentioning

confidence: 99%

“…The results of these studies have shown from 18.6% (2) to 96.1% (3) occurrence of the fourth (MB2) canal in maxillary first molars, depending on which method was used. The literature shows both clinical (in vivo) and laboratory (in vitro) results (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14) and that more MB2 canals can be found in the laboratory than were found clinically (4). In short, the incidence varies widely, depending on the method used: whether done with or without dye penetration, radiographically, various sectioning tech-niques, record reviews, different social groups, different age groups, with or without magnification, etc.…”

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confidence: 99%

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Canal morphology of maxillary molars: Clinical observations of canal configurations

Stropko

1999

Journal of Endodontics

223

210

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An examination of 1732 conventionally treated maxillary molars was made in an attempt to deter-mine the percentage of MB2 canals that could be located routinely. The teeth examined were 1096 first molars, 611 second molars, and 25 third mo-lars. The results were recorded on a modified computer program over an 8-yr period of time. An in-teresting trend was noted. The MB2 canal was found in 802 (73.2%) first molars, 310 (50.7%) sec-ond molars, and 5 (20.0%) third molars. It occurred as a separate canal in 54.9% of first molars, 45.6% of second molars, and joined in all third molars. However, as the operator became more experi-enced, scheduled sufficient clinical time, routinely employed the dental operating microscope, and used specific instruments adapted for microend-odontics, MB2 canals were located in 93.0% of first molars and 60.4% in second molars.

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confidence: 99%

mentioning

confidence: 99%

Canal morphology of maxillary molars: Clinical observations of canal configurations

Stropko

1999

Journal of Endodontics

223

210

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“…Various studies have been done to study the routine variations in the canal anatomy with perplexing results without consensus. Many of these studies are in vitro, 1,[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] whereas in vivo studies are limited. [24][25][26][27][28][29][30][31] On the other hand most of the observations have been done by naked eye 1,9,11-18 whereas relatively very few have used magnification.…”

Section: Discussionmentioning

confidence: 99%

“…[24][25][26][27][28][29][30][31] On the other hand most of the observations have been done by naked eye 1,9,11-18 whereas relatively very few have used magnification. 18,21,22,[29][30][31][32][33] Results of studies using microscope 18,29,30,34,35 are very surprising and indicative of efficiency and utility of using microscope for such observations. Studies in the past have also shown that developing proper skill, adopting proper methodology makes a significant difference in the proper visualization/ location of the anatomical variations.…”

Section: Discussionmentioning

confidence: 99%

An in vivo Study of Variations in the Canal Anatomy of Maxillary and Mandibular First Molar using Surgical Operating Microscope

Ahmed¹,

Pawar²

2013

World Journal of Dentistry

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Introduction:The success of endodontic therapy depends upon the ability of the clinician to locate, clean, shape and completely obturate all the root canal systems present in a tooth. In the recent times number of additional canals vs traditional canals has been very striking and pointing toward a greater degree of variation in the root canal morphology which needs to studied, understood and born in mind during practice so as to enhance the success. Introduction of surgical operating microscope is a major breakthrough in enhancement of vision in endodontics which not only gives required magnification but also coaxial illumination and video output. These facilities should be of a great help in location of small otherwise difficult to locate accessory canals.

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“…O apertamento dentário consiste numa atividade inconsciente de apertar e ranger os dentes de forma rítmica ou espasmódica durante o sono e tem a capacidade de provocar dor facial e desgaste dentário 18 . Tendo em vista os inconvenientes que a ocorrên-cia de nódulos pulpares acarretam ao tratamento endodôntico, dificultando e muitas vezes impedindo o acesso aos canais radiculares 19 , torna-se clara a necessidade de mais estudos que investiguem a etiologia das calcificações, bem como sua prevalên-cia. O objetivo deste estudo foi avaliar a prevalência de nódulos pulpares na câmara pulpar de molares de estudantes de Odontologia e fatores associados.…”

Section: Introductionunclassified

Prevalência de nódulos pulpares em molares de estudantes de Odontologia e fatores associados

Selayaran

Guerra

Luz

et al. 2013

Rev. da Fac. de Odontologia, UPF

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IntroduçãoAs calcificações pulpares surgem como corpos livres no tecido pulpar, mas podem se encontrar aderidas ou embutidas nas paredes dentinárias. Essas calcificações podem ser divididas em tipos distintos: dentículos, compostos por restos epiteliais circundados por dentina secretada por odontoblastos; calcificações lineares difusas, que compreendem pequenas áreas calcificadas irregulares e paralelas aos vasos sanguíneos e feixes nervosos da polpa; e cálculos pulpares, que seguem um padrão concên-trico de calcificação em torno de uma área de célu-las necróticas ou fibras colágenas 1 . As calcificações pulpares são mais frequentes na polpa coronária de dentes posteriores, sendo os pré-molares menos acometidos que os molares. Somente calcificações com mais de 200 µm de diâ-metro são visíveis radiograficamente, e um ou mais cálculos pulpares podem ser encontrados em um mesmo dente 2 . Com relação à etiologia, sabe-se que a formação de calcificações pulpares ainda não foi completamente esclarecida, e diversos fatores causais vêm sendo relacionados com a sua ocorrência. Sabe-se que idade 3,4 , distúrbios circulatórios na polpa 5 e predisposição genética têm relação com o processo 2,6 . Existem, ainda, anomalias congênitas relacionadas com a formação de calcificações pulpares, como a displasia dentinária tipo II 7 e as síndromes de Marfan e de Ehlers-Danlos 8 .

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Factors affecting the negotiability of second mesiobuccal canals in maxillary molars

Cited by 57 publications

References 10 publications

Canal morphology of maxillary molars: Clinical observations of canal configurations

Canal morphology of maxillary molars: Clinical observations of canal configurations

An in vivo Study of Variations in the Canal Anatomy of Maxillary and Mandibular First Molar using Surgical Operating Microscope

Prevalência de nódulos pulpares em molares de estudantes de Odontologia e fatores associados

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