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Determination of frequency of the second mesiobuccal canal in the permanent maxillary first molar teeth with magnification loupes (× 3.5).

Hasan M, Raza Khan F - Int J Biomed Sci (2014)

Bottom Line: It was found that the males tend to have a higher proportion of second mesiobuccal canals (up to 31%) as compared to the females in whom the second mesiobuccal canals could be identified only 19% of the time.Whilst, there was no association found between age, gender and chamber obliteration with the presence of second mesiobuccal canal.In conclusion, within its limitations, this study suggested that the use of magnification loupes enhanced both the detection (50.9%) and negotiation (86.8%) of the second mesiobuccal canals in the permanent maxillary first molars beyond what could be achieved with naked eye.

View Article: PubMed Central - PubMed

Affiliation: Dental Section, Department of Surgery, The Aga Khan University Hospital, Karachi, Pakistan.

ABSTRACT

Introduction: The mesiobuccal root of the maxillary first molar has generated more research and clinical investigation than any root. An inability to detect and treat a second mesiobuccal (MB2) canal is a reason for endodontic failure in maxillary first molars. Modifications in the endodontic access and detection techniques, along with advancements in illumination and magnification technology, have aided in the location and treatment with the second mesiobuccal canal of maxillary first molars.

Objective: To determine the frequency of the second mesiobuccal canal in the permanent maxillary first molars with magnification loupes (× 3.5).

Materials and methods: A total of 53 teeth were assessed using a moderate magnification for second mesiobuccal canal in mesiobuccal root of first permanent maxillary molars in vivo. Detection of this canal in maxillary first molars was done through a clinical access cavity preparation under magnification loupes (× 3.5). Data was analyzed using SPSS 15.0. Frequency distribution of variables was determined and the level of significance was kept at 0.05.

Results: We were able to detect second mesiobuccal canal in 27 out of 53 (50.9%) of the permanent maxillary first molars that were studied. It was found that the males tend to have a higher proportion of second mesiobuccal canals (up to 31%) as compared to the females in whom the second mesiobuccal canals could be identified only 19% of the time. Whilst, there was no association found between age, gender and chamber obliteration with the presence of second mesiobuccal canal.

Conclusions: In conclusion, within its limitations, this study suggested that the use of magnification loupes enhanced both the detection (50.9%) and negotiation (86.8%) of the second mesiobuccal canals in the permanent maxillary first molars beyond what could be achieved with naked eye.

No MeSH data available.


Related in: MedlinePlus

Another example of a case demonstrating second mesiobuccal canal. 1, Access opening of maxillary first molar; 2, MB 2 located; 3, All canals prepared and ready for obturation; 4, The post-obturation view.
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Figure 2: Another example of a case demonstrating second mesiobuccal canal. 1, Access opening of maxillary first molar; 2, MB 2 located; 3, All canals prepared and ready for obturation; 4, The post-obturation view.

Mentions: The primary mesiobuccal, distobuccal and palatal orifices were identified and scouted using small hand files. At this stage, a working length radiograph was obtained. The identified canals were coronally flared and the access was further refined so that the orifices lie at the peripheries of the chamber and the triangular dentin lying on top of each orifice is also eliminated. If the second mesiobuccal canal could not be readily located, gentle troughing with a small round carbide bur in low speed handpiece was performed on the mesial sub-pulpal groove. This developmental groove forms a line that connects the palatal and mesiobuccal canals and the orifice of mesiobuccal canal is usually present on this groove or 2 mm mesial to it. After at least 2 mm of chamber floor troughing, if the second mesiobuccal could still not be located, then no further effort was made. This was done to prevent any inadvertent perforation. Examples of actual clinical cases can be seen in Figure 1 and Figure 2. Standard root canal treatment was then performed which involved thorough shaping, cleaning and obturating of the root canal system followed by a definitive restoration.


Determination of frequency of the second mesiobuccal canal in the permanent maxillary first molar teeth with magnification loupes (× 3.5).

Hasan M, Raza Khan F - Int J Biomed Sci (2014)

Another example of a case demonstrating second mesiobuccal canal. 1, Access opening of maxillary first molar; 2, MB 2 located; 3, All canals prepared and ready for obturation; 4, The post-obturation view.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4199472&req=5

Figure 2: Another example of a case demonstrating second mesiobuccal canal. 1, Access opening of maxillary first molar; 2, MB 2 located; 3, All canals prepared and ready for obturation; 4, The post-obturation view.
Mentions: The primary mesiobuccal, distobuccal and palatal orifices were identified and scouted using small hand files. At this stage, a working length radiograph was obtained. The identified canals were coronally flared and the access was further refined so that the orifices lie at the peripheries of the chamber and the triangular dentin lying on top of each orifice is also eliminated. If the second mesiobuccal canal could not be readily located, gentle troughing with a small round carbide bur in low speed handpiece was performed on the mesial sub-pulpal groove. This developmental groove forms a line that connects the palatal and mesiobuccal canals and the orifice of mesiobuccal canal is usually present on this groove or 2 mm mesial to it. After at least 2 mm of chamber floor troughing, if the second mesiobuccal could still not be located, then no further effort was made. This was done to prevent any inadvertent perforation. Examples of actual clinical cases can be seen in Figure 1 and Figure 2. Standard root canal treatment was then performed which involved thorough shaping, cleaning and obturating of the root canal system followed by a definitive restoration.

Bottom Line: It was found that the males tend to have a higher proportion of second mesiobuccal canals (up to 31%) as compared to the females in whom the second mesiobuccal canals could be identified only 19% of the time.Whilst, there was no association found between age, gender and chamber obliteration with the presence of second mesiobuccal canal.In conclusion, within its limitations, this study suggested that the use of magnification loupes enhanced both the detection (50.9%) and negotiation (86.8%) of the second mesiobuccal canals in the permanent maxillary first molars beyond what could be achieved with naked eye.

View Article: PubMed Central - PubMed

Affiliation: Dental Section, Department of Surgery, The Aga Khan University Hospital, Karachi, Pakistan.

ABSTRACT

Introduction: The mesiobuccal root of the maxillary first molar has generated more research and clinical investigation than any root. An inability to detect and treat a second mesiobuccal (MB2) canal is a reason for endodontic failure in maxillary first molars. Modifications in the endodontic access and detection techniques, along with advancements in illumination and magnification technology, have aided in the location and treatment with the second mesiobuccal canal of maxillary first molars.

Objective: To determine the frequency of the second mesiobuccal canal in the permanent maxillary first molars with magnification loupes (× 3.5).

Materials and methods: A total of 53 teeth were assessed using a moderate magnification for second mesiobuccal canal in mesiobuccal root of first permanent maxillary molars in vivo. Detection of this canal in maxillary first molars was done through a clinical access cavity preparation under magnification loupes (× 3.5). Data was analyzed using SPSS 15.0. Frequency distribution of variables was determined and the level of significance was kept at 0.05.

Results: We were able to detect second mesiobuccal canal in 27 out of 53 (50.9%) of the permanent maxillary first molars that were studied. It was found that the males tend to have a higher proportion of second mesiobuccal canals (up to 31%) as compared to the females in whom the second mesiobuccal canals could be identified only 19% of the time. Whilst, there was no association found between age, gender and chamber obliteration with the presence of second mesiobuccal canal.

Conclusions: In conclusion, within its limitations, this study suggested that the use of magnification loupes enhanced both the detection (50.9%) and negotiation (86.8%) of the second mesiobuccal canals in the permanent maxillary first molars beyond what could be achieved with naked eye.

No MeSH data available.


Related in: MedlinePlus