Variability of master gutta-percha cones

Moule, Alex J., Kellaway, Richard, Clarkson, Roger, Rowell, John, Macfarlane Richard, Lewis, Derek, Cameron, Tony and Atkins, Daryl (2002) Variability of master gutta-percha cones. Australian Endodontic Journal, 28 1: 38-43. doi:10.1111/j.1747-4477.2002.tb00365.x


Author Moule, Alex J.
Kellaway, Richard
Clarkson, Roger
Rowell, John
Macfarlane Richard
Lewis, Derek
Cameron, Tony
Atkins, Daryl
Title Variability of master gutta-percha cones
Journal name Australian Endodontic Journal   Check publisher's open access policy
ISSN 1329-1947
1747-4477
Publication date 2002
Sub-type Article (original research)
DOI 10.1111/j.1747-4477.2002.tb00365.x
Open Access Status
Volume 28
Issue 1
Start page 38
End page 43
Total pages 6
Place of publication Richmond, VIC Australia
Publisher Wiley-Blackwell
Language eng
Abstract The common technique to hermetically fill prepared root canals involves the use of “standardised” guttapercha cones that are selected to fit the apical portion of the prepared canal space. These guttapercha cones are manufactured to conform to a standard size and taper which should correspond to the size and taper of standard root canal instruments. Clinical observation of commercially available guttapercha cones seemed to indicate that there is wide variation in the diameter and taper of “standardised” gutta-percha cones within the size range 25–35. The present study was undertaken to determine how closely current commercially available gutta-percha cones sizes 25, 30 and 35 conformed to the current ISO standard, and was initiated by the above clinical observation. It was not the purpose of this study to compare the results from different brands or manufacturers, but rather to establish whether commercially available gutta-percha cones collectively conformed to expected standardised sizes. One phial of cones for each of the sizes 25, 30 and 35 of eight different brands was selected for examination. The diameter of each of ten cones for each size from each brand was measured at two points, at 1 mm and at 6 mm from the tip of the cone. The results obtained for each size and each brand were tabulated and compared with ISO 6877:1995 for dental root canal obturating cones. This study demonstrated wide variability for cones from all brands, for all sizes, when individual cones of the same size were compared. While collectively the arithmetic means showed a closer correlation to the ISO Standard, irrespective of the brand size of the cone, or whether the cone was measured at 1 mm or 6 mm, many individual cones showed a great variation from the ideal. The need for less variability is discussed. It is concluded that ISO standard 6877:1995 is inappropriate and allows for too much variation in the size of “standardised” gutta-percha cones.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Dentistry Publications
 
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