The effect of instrument precurving on transportation in simulated curved canals

Timothy Svec

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The results of instrumentation studies in small curved canals using various instruments and techniques are not consistent. The amount of instrument precurving and a gradual or abrupt curve of the canal may have influenced the results of these studies. One hundred sixty resin blocks with simulated canals were used. Eighty blocks had gradual (GC) 30 degree curves, the remainder had abrupt (AC) 30 degree curves. Ten blocks for each curvature and for each degree of precurving amount (0, 15, 20, 25, 30, 35, 40, or 45 degrees) were instrumented with a machine that imparted only an in and out motion. The simulated canals were size 30 at the apex, and size 30 stainless steel K-f iles were used to instrument the canals. A transportation ("t") index was determined at two levels: T1 (1 mm from the apex) and TB (a line bisecting the curve of the canal). For GC at T1 and TB, 40and 20-degree curved instruments respectively produced significantly less transportation than all other curvatures (p <0.0001). For AC at T1 and TB, 35 and 25 degree instruments respectively produced significantly less transportation than all other curvatures (p <0.0001). Comparing GC and AC, the transportation for AC was significantly less (p <0.0015).

Original languageEnglish (US)
Pages (from-to)122-124
Number of pages3
JournalJournal of Endodontics
Volume24
Issue number2
StatePublished - 1998
Externally publishedYes

Fingerprint

Stainless Steel

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

The effect of instrument precurving on transportation in simulated curved canals. / Svec, Timothy.

In: Journal of Endodontics, Vol. 24, No. 2, 1998, p. 122-124.

Research output: Contribution to journalArticle

@article{a2dfe3e30de34b0e954fc87ad7bd077e,
title = "The effect of instrument precurving on transportation in simulated curved canals",
abstract = "The results of instrumentation studies in small curved canals using various instruments and techniques are not consistent. The amount of instrument precurving and a gradual or abrupt curve of the canal may have influenced the results of these studies. One hundred sixty resin blocks with simulated canals were used. Eighty blocks had gradual (GC) 30 degree curves, the remainder had abrupt (AC) 30 degree curves. Ten blocks for each curvature and for each degree of precurving amount (0, 15, 20, 25, 30, 35, 40, or 45 degrees) were instrumented with a machine that imparted only an in and out motion. The simulated canals were size 30 at the apex, and size 30 stainless steel K-f iles were used to instrument the canals. A transportation ({"}t{"}) index was determined at two levels: T1 (1 mm from the apex) and TB (a line bisecting the curve of the canal). For GC at T1 and TB, 40and 20-degree curved instruments respectively produced significantly less transportation than all other curvatures (p <0.0001). For AC at T1 and TB, 35 and 25 degree instruments respectively produced significantly less transportation than all other curvatures (p <0.0001). Comparing GC and AC, the transportation for AC was significantly less (p <0.0015).",
author = "Timothy Svec",
year = "1998",
language = "English (US)",
volume = "24",
pages = "122--124",
journal = "Journal of Endodontics",
issn = "0099-2399",
publisher = "Elsevier Inc.",
number = "2",

}

TY - JOUR

T1 - The effect of instrument precurving on transportation in simulated curved canals

AU - Svec, Timothy

PY - 1998

Y1 - 1998

N2 - The results of instrumentation studies in small curved canals using various instruments and techniques are not consistent. The amount of instrument precurving and a gradual or abrupt curve of the canal may have influenced the results of these studies. One hundred sixty resin blocks with simulated canals were used. Eighty blocks had gradual (GC) 30 degree curves, the remainder had abrupt (AC) 30 degree curves. Ten blocks for each curvature and for each degree of precurving amount (0, 15, 20, 25, 30, 35, 40, or 45 degrees) were instrumented with a machine that imparted only an in and out motion. The simulated canals were size 30 at the apex, and size 30 stainless steel K-f iles were used to instrument the canals. A transportation ("t") index was determined at two levels: T1 (1 mm from the apex) and TB (a line bisecting the curve of the canal). For GC at T1 and TB, 40and 20-degree curved instruments respectively produced significantly less transportation than all other curvatures (p <0.0001). For AC at T1 and TB, 35 and 25 degree instruments respectively produced significantly less transportation than all other curvatures (p <0.0001). Comparing GC and AC, the transportation for AC was significantly less (p <0.0015).

AB - The results of instrumentation studies in small curved canals using various instruments and techniques are not consistent. The amount of instrument precurving and a gradual or abrupt curve of the canal may have influenced the results of these studies. One hundred sixty resin blocks with simulated canals were used. Eighty blocks had gradual (GC) 30 degree curves, the remainder had abrupt (AC) 30 degree curves. Ten blocks for each curvature and for each degree of precurving amount (0, 15, 20, 25, 30, 35, 40, or 45 degrees) were instrumented with a machine that imparted only an in and out motion. The simulated canals were size 30 at the apex, and size 30 stainless steel K-f iles were used to instrument the canals. A transportation ("t") index was determined at two levels: T1 (1 mm from the apex) and TB (a line bisecting the curve of the canal). For GC at T1 and TB, 40and 20-degree curved instruments respectively produced significantly less transportation than all other curvatures (p <0.0001). For AC at T1 and TB, 35 and 25 degree instruments respectively produced significantly less transportation than all other curvatures (p <0.0001). Comparing GC and AC, the transportation for AC was significantly less (p <0.0015).

UR - http://www.scopus.com/inward/record.url?scp=0031990191&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031990191&partnerID=8YFLogxK

M3 - Article

VL - 24

SP - 122

EP - 124

JO - Journal of Endodontics

JF - Journal of Endodontics

SN - 0099-2399

IS - 2

ER -