What percentage of maxillary second molars have MB2?

What percentage of maxillary second molars have MB2?

The incidence of MB2 canal was 86.36% in maxillary first molars and 29.4% in maxillary second molars.

Which teeth have MB2 canal?

One of the most infamous canals we chase in endodontics is the second mesio-buccal (MB2) canal in maxillary molars. It’s often referred to as the “fourth canal,” and it is one of the most frustrating aspects of maxillary molar root canals.

How many root canals are in a maxillary second molar?

Although variations in the maxillary second molar may occur, it generally has three roots and three canals, while a second mesiobuccal canal (MB2) is found in 56.9–79.6% of cases. However, rare variations other than one or two roots can also be found in the maxillary second molar.

How many canal does 2nd molar have?

Mandibular second molars usually have two roots with three root canals, two in the mesial root and one in the distal root; however, these teeth can present severe anatomical variations, such as the presence of three canals in the mesial root, two canals in the distal root, or supernumerary roots [2].

How do I get MB2 canal?

The MB2 canal is commonly located within the developmental groove between MB1 and palatal orifices. Envisage a line joining the MB1 and palatal canal, and draw another line from DB to this line.

Can second molars be removed?

The cases presented here clearly demonstrate that the removal of second permanent molars can be effective in many cases where removal of first or second bicuspids would otherwise be recommended. Third molars can be useful components of the dentition.

When do second molars come in?

The 2 -year molars (also known as second molars) are the last set of teeth at the back of the mouth. They typically erupt when your child is between 23 and 33 months old. This process can be very uncomfortable, causing even the happiest child to become irritable.

What age do second molars come in?


Upper Teeth When should it emerge? When should it fall out?
First Molar 13 to 19 months 9 to 11 years
Canine (cuspid) 16 to 22 months 10 to 12 years
Second Molar 25 to 33 months 10 to 12 years
Lower Teeth

How is MB2 canal treated?

In Figures 2 and 3, a MB lesion is seen centered around the apical exit point of an untreated MB2 canal. Such cases could and should be treated by means of non-surgical root canal retreatment, or apicoectomy, and with use of a dental microscope.

How do I know if I have MB2 canal?

Lines in the pulp chamber floor lead to the entrance of the canals; these lines form a “map”, also known as rostrum canalis. Following these lines with an endodontic explorer from the mesiobuccal to the palatal canal is a good manner to locate the MB2 canal, as it is usually located 2–3 mm from the mesiobuccal canal.

How often does second molar have MB2?

The higher occurrence has since been verified in the endodontic literature with reports of up to 93 % in first molars and 60 % in second molars (Stropko et al, JOE 1999). In order to optimize successful treatment of maxillary molars, finding and treating the MB2 canal is essential.