Investigation of the endodontic space in maxillary first permanent molars.

The purpose of the investigation was to establish the exact number of root canals in the maxillary first permanent molar, their direction, type and relation, based upon a large number of random samples. Randomly chosen 443 maxillary first permanent molars (221 left and 222 right) were investigated with the aim to get more knowledge into the morpho­ logy of the endodontic space. One canal in the mesiobuccal root appeared in 366 teeth or 82.62% and three canals in mesiobuccal root were found in 25 teeth or 5.64%. In the distobuccal root two canals were found in 8 teeth or 1.81%. In palatal root two canals were found in 4 teeth or 0.9%. Analizing the obtained data it has been established that there was not a significant correlation between the appearence of two canals in the mesiobuccal root and the side of the jaw. There '\s also no relation between the type of the canals and splitting of the mesiobuccal root at the apex.