A mathematically based classification of root canal curvatures on natural human teeth

Journal of Endodontics
C D NagyJ Szabó

Abstract

Testing of root canal-shaping instruments on natural human teeth has many difficulties, because of the different anatomical forms of root canals. There is a lack of an internationally accepted and mathematically based classification of root canal morphology. The aim of this study was to give a mathematical description of root canal forms with the help of differentiated geometrical pattern analysis and computer graphics. The measurements of 433 roots were conducted on isometric radiographs taken from the clinical view. Measured points of the same radiographs were approximated using fourth degree polynomial functions describing the imaginary axis of canals. The classification of root canal morphology on the basis of Schneider's angle differs from the classification of geometrical pattern analysis. Fourth-degree function approximation as a new method for the description of the shape of root canal curvatures seems to be exact and reliably repeatable. This type of classification of root canals is suitable for standardizing test specimens, including natural human teeth used for testing root forms: I (straight), J (apical curve), C (entirely curved), or S (multicurved).

References

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Citations

Jan 25, 2008·Journal of Endodontics·Brita WillershausenBenjamin Briseño Marroquin
Apr 6, 2006·International Endodontic Journal·A JuhászC Dobó-Nagy
Jan 6, 2006·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·D SonntagV Stachniss
Aug 1, 2006·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Hale CimilliPaul Wesselink
Mar 24, 2006·Journal of Endodontics·Brita WillershausenBenjamin Briseño Marroquín
Apr 11, 2006·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·D SonntagV Stachniss
May 3, 2002·International Endodontic Journal·C Dobó-NagyM Madléna
Jan 24, 2003·Journal of Endodontics·Melanie A Kim-ParkGary R Hartwell
Dec 25, 2015·International Endodontic Journal·S Faraj, C Boutsioukis
Aug 28, 2015·Brazilian Dental Journal·Carlos EstrelaJesus Djalma Pécora
Jun 24, 2008·Brazilian Dental Journal·Carlos EstrelaJesus Djalma Pécora
Oct 26, 2005·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Figen KaptanGündüz Bayirli
Jul 27, 2001·Journal of Endodontics·C Dobó-NagyJ Szabó
Aug 14, 2018·International Endodontic Journal·R C HartmannG Rossi-Fedele
Feb 17, 2018·Acta Odontologica Scandinavica·Asterios ChristodoulouKleoniki Lyroudia
Oct 16, 2018·Australian Endodontic Journal : the Journal of the Australian Society of Endodontology Inc·Emrah KaratasliogluEce Avci
Feb 16, 2021·Journal of Endodontics·Aleš FidlerMarko Kuralt

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