sutton065

Middle mesial canals in mandibular first molars:  a micro-CT study in different populations Marco Aurélio Versiani, Ronald Ordinola-Zapata, Ali Keleş, Hatice Alcin,  Clóvis Monteiro Bramante, Jesus Djalma Pécora, Manoel Damião Sousa-Neto Objective To describe the morphological aspects of middle mesial canals (MMC) in mandibular first molars using micro-CT. Design Mandibular first molars collected from the Brazilian (n=136) and Turkish (n=122) populations were scanned (voxel size: 9.9 μm) and mesial roots with MMC (n=48) evaluated regarding several morphological aspects. The incidence of MMC in each population was statistically compared using Chi-square test (α=0.05). Results Overall, the incidence of MMC was 18.6% (48 out of 258 molars) and was significantly higher in the Brazilian (n=30; 22.1%) than in the Turkish (n=18; 14.8%) population (p<0.05). In both populations, confluent configuration of the MMC was the most frequent anatomy. Most of the specimens with MMC had 3 in...

Click HERE to download the Power Point presentation with all pictures and a high-resolution video

Click HERE to download the Power Point presentation with all pictures and a high-resolution video

Click HERE to download the Power Point presentation with all pictures and a high-resolution video

Click HERE to download the Power Point presentation with all pictures and a high-resolution video

Click HERE to download the Power Point presentation with all pictures and a high-resolution video

Click here to download an editable Power Point file with all pictures  and the movie of the middle mesial canal Click on the picture to enlarge Source: Pathways of Pulp 10th Ed (p.190)

Click here to download an editable Power Point file with all pictures  and the movie of the middle mesial canal Click on the picture to enlarge Source: Pathway of Pulp 10th Ed. (p. 209) In a study of 760 mandibular molars, Fabra found that 20 (2.6%) had three canals in the mesial root. In 13 of these (65%) the third canal joined the mesiobuccal canal in the apical third of the root and in 6 (30%) they converged with the mesiolingual canal, also in the apical third; the third canal ended as an independent canal in only 1 case. Many authors agree on the presence of three foramena in the mesial root but few report three independent canals, which presents itself as a rare anatomical variant. Walker cites 3 canals in the mesial root of the mandibular first molars as an infrequent ocurrence. Goel notes that the mesial root of permanent mandibular first molars presented two foramena in 60% of the specimens they examined, 6,7% had three and 3.3% even had four. In early studies by Hess, onl...