Izvorni znanstveni članak
Irrigation of human prepared root canal – ex vivo based computational fluid dynamics analysis
Damir Šnjarić
; Private dental practice “Dr Mirta Kučan Moraal,” Rijeka, Croatia
Zoran Čarija
; Department for Fluid Mechanic and Computational Engineerings Technical Faculty, University of Rijeka, Rijeka, Croatia
Alen Braut
; Department of Restorative Dentistry and Endodontics, University of Rijeka School of Medicine, School of Dentistry, Rijeka, Croatia
Adelaida Halaji
; Department of Radiology, Medikol Zagreb, Zagreb, Croatia
Maja Kovačević
; Private dental practice “Dr sc Maja Kovačević, dr.med.dent.”, Rijeka, Croatia
Davor Kuiš
; Department of Oral Medicine and Periodontology, University of Rijeka School of Medicine, School of Dentistry, Rijeka, Croatia
Sažetak
Aim To analyze the influence of the needle type, insertion
depth, and irrigant flow rate on irrigant flow pattern, flow
velocity, and apical pressure by ex-vivo based endodontic
irrigation computational fluid dynamics (CFD) analysis.
Methods Human upper canine root canal was prepared
using rotary files. Contrast fluid was introduced in the root
canal and scanned by computed tomography (CT) providing
a three-dimensional object that was exported to
the computer-assisted design (CAD) software. Two probe
points were established in the apical portion of the root
canal model for flow velocity and pressure measurement.
Three different CAD models of 27G irrigation needles
(closed-end side-vented, notched open-end, and bevel
open-end) were created and placed at 25, 50, 75, and 95%
of the working length (WL). Flow rates of 0.05, 0.1, 0.2, 0.3,
and 0.4 mL/s were simulated. A total of 60 irrigation simulations
were performed by CFD fluid flow solver.
Results Closed-end side-vented needle required insertion
depth closer to WL, regarding efficient irrigant replacement,
compared to open-end irrigation needle types,
which besides increased velocity produced increased irrigant
apical pressure. For all irrigation needle types and needle
insertion depths, the increase of flow rate was followed
by an increased irrigant apical pressure.
Conclusions The human root canal shape obtained by CT
is applicable in the CFD analysis of endodontic irrigation.
All the analyzed values –irrigant flow pattern, velocity, and
pressure – were influenced by irrigation needle type, as
well as needle insertion depth and irrigant flow rate.
Ključne riječi
Hrčak ID:
94945
URI
Datum izdavanja:
15.10.2012.
Posjeta: 2.574 *