introduction: coronal anatomic variations in permanent maxillary molars are unusual; conversely variations involving the number of root canals or number of roots are more common. methods and materials: this case report presents a successful nonsurgical endodontic therapy of left maxillary first molar with three roots and seven root canals. this unusual morphology was diagnosed using a dental op...

In many languages affixes can assign accents on roots to which they attach. Some previous studies have claimed that accents assigned by affixes universally fall on syllables next to the affixes (Kurisu 2001; Revithiadou 2008). Kawahara and Wolf (2010) document a newly-coined suffix which counterexemplifies this generalization: the new Japanese suffix [-zu] assigns an accent on root-initial syll...

For any odd prime power q, all (q&q+1)th roots of unity clearly lie in the extension field Fq6 of the Galois field Fq of q elements. It is easily shown that none of these roots of unity have trace &2, and the only such roots of trace &3 must be primitive cube roots of unity which do not belong to Fq . Here the trace is taken from Fq6 to Fq . Computer based searching verified that indeed &2 and ...

BACKGROUND The success of endodontic treatment is greatly affected by the location of the root canals. The purpose of this study was to evaluate the root and canal morphology of permanent maxillary first and second molars in a Polish population using cone-beam computed tomography scanning. METHODS Cone-beam computed tomography (CBCT) scans of maxillary first and second molars the maxilla were...