Professional paper

A step-back method for intracanal preparation with multiple length determination of the tooth root canal

Tomislav Tamarut ; Medicinski fakultet — Stomatološki studij, Rijeka,Dom zdravlja, Rijeka, Hrvatska
Višnja Blašković ; Medicinski fakultet — Stomatološki studij, Rijeka,Dom zdravlja, Rijeka, Hrvatska
Nada Cindrić ; Medicinski fakultet — Stomatološki studij, Rijeka,Dom zdravlja, Rijeka, Hrvatska
Branimir Maričić ; Medicinski fakultet — Stomatološki studij, Kliničku centar, Rijeka, Hrvatska

Abstract

A procedure of intracanal preparation of a cuneiform with cervical
extenision using a step-back technique is described. The length of the root canal is determined by multiple electric measurement. First, the initial measurement of the canal length (l1) is performed. The measured length is then transferred to the initial extender (No. 15), whereafter extirpation of the pulp and removal of circumpulpal dentin begin. Then the extender NO. 20 is reduced by 1 mm, and the extender No. 25 by 2 mm.When the canal have been narrowed and bent, fur ther extenders are used to additionally reduce the working length by 1 mm more. When the pulp has been extirpated, the second canal length measurement (12) is performed, then starting to form the canal. In phase 1, the apical third from the initial (IAF) to the leading file (MAF) is treated and the cervical extension of the canal prepared by a bur drill. In further instrumenta­tion, each next file is reduced by 1 mm of the measured canal length (12), thus shaping the canal by filling, using a step-back method. Files according to Hedström should be used thereby. Shaping of the canal is completed by a file by four numbers greater than the leading (MAF) one.

Keywords

intracanal preparation; multiple electric length measurement

Hrčak ID:

101772

URI

https://hrcak.srce.hr/101772

Publication date:

15.12.1989.

Article data in other languages: croatian

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