Prevalence of Second Mesio-Buccal (Mb2) Canal in Permanent Maxillary First Molar

Objective: The aim of this study is to determine the prevalence of second mesio-buccal canal in permanent maxillary first molars. Study Design: Cross sectional study. Place and Duration: Dr Ishrat ul Ebad Khan Institute of Oral Health Sciences, Karachi during the period from February 2020 to January 2021 Patients and Methods: Three hundred and fifty cases of both genders were presented in this study. Patients were aged between 18-60years. Patients’ detailed demographics including age, sex and body mass index were recorded after taking written consent. Local anesthesia was given for isolation of rubber dam. The pulp chamber floor was clearly visualized and the access cavity was ready. The location of the MB2 channel in three phases was done. Complete data was analyzed by SPSS 22.0 version. Results: Mean age of the patients were 30.14±17.47 years with mean BMI 25.61±8.25 kg/m2. Among 350 cases, Majority of the patients 225 (64.3%) were male while the rest 125 (35.7%) were females. Majority of the patients were from age group 20-30 years and less patients were between 51-60 years old. Frequency of second mesiobuccal canal was found in 280 (80%) patients. Conclusion: We concluded in this study that prevalence of MB2 channel was reported in 80% in the initially permanent maxillary molars. Most MB2 canal apertures are distal from the main MB channel and most MB2 apertures are palatal. Key words: Permanent maxillary first molar, MB2 canals, Frequency

Detecting second mesiobuccal canal in maxillary first molars in Erbil citizens: CBCT Retrospective study.

Background and Objectives: The success of root canal therapy is depending on cleaning and shaping of the root canals. The root canals have complex morphology and wide individual variations. The purpose of this study was to investigate the prevalence of second mesiobuccal canal (MB2) of maxillary first molars in Erbil population using cone beam computed tomography (CBCT). Materials and Methods: A total of 101 permanent maxillary first molars were randomly se-lected from Erbil citizens. All teeth were examined for the number of root canals and the pres-ence of second mesiobuccal canal by Cone Beam Computed Tomography (CBCT). Result: The MB2 canal was found in 80.2% (the 95% CI is 72.3% to 87.1%) of the analyzed cas-es (81/101). Conclusion: The second mesiobuccal canal was found in a high percentage of the samples. And it is within normal magnitude in comparison with the common findings in the literature. These results indicate that CBCT is an effective, high-precision diagnostic tool for detecting canals. Keywords: Maxillary first molars, second mesiobuccal canal, cone beam computed tomography, Erbil Citizens.

Estimation of the frequency of second mesiobuccal root canal in maxillary first permanent molar teeth in subjects visiting teaching dental hospitals of Peshawar.

Objectives: To determine the frequency of second mesiobuccal canal (MB2) in a sample of 223 extracted maxillary permanent 1st molars. Study Design: In-vitro Cross-sectional study. Setting: Department of Endodontic at Peshawar Dental Hospital. Period: June 2019-Nov 2019. Material & Methods: The samples were processed with application of the Clearing Technique which includes demineralization with nitric acid, dehydration with ethanol and clearing with methyl salicylate. The samples were classified according to Weine’s system of root canal classification. Results: Among the 223 samples, 30% were found to have Weine’s type1 root canal in the mesiobuccal root (second mesiobuccal canal absent). Second mesiobuccal canal was present in majority of the samples (70%) with Weines type2 (2-1) predominant with 23.32%, Weines type3 (2-2) present in 15.7% and Weines type 4 (1-2) present in 21% of the samples. 9% of the samples could not fit into Weines classification so they were placed in Vertuccis classification for root canal system type 6 (2-1-2). Conclusion: The present study concludes that the second mesiobuccal canal is more frequently found in maxillary permanent 1st molar teeth than our textbooks report, irrespective of quadrant and gender. Therefore, time should be given to evaluation of its anatomy by the clinician before starting the root canal treatment for the greater good of the community.