Document Detail

Measurement of pressure and flow rates during irrigation of a root canal ex vivo with three endodontic needles.
MedLine Citation:
PMID:  17326784     Owner:  NLM     Status:  MEDLINE    
AIM: To monitor ex vivo intra-canal irrigation with three endodontic needles (25, 27 and 30 gauge) and compare them in terms of irrigant flow rate, intra-barrel pressure, duration of irrigation and volume of irrigant delivered. METHODOLOGY: A testing system was constructed to allow measurement of selected variables with pressure and displacement transducers during ex vivo intra-canal irrigation with a syringe and three different needles (groups A, B, C) into a prepared root canal. Ten specialist endodontists performed the irrigation procedure. Each operator performed ten procedures with each needle. Data recorded by the transducers were analysed using Friedman's test, Wilcoxon Signed Rank test, Mann-Whitney U-test and Kendall's T(b) test. The level of significance was set to 95%. RESULTS: Significant differences were detected among the three needles for most variables. Duration of delivery and flow rates significantly decreased as the needle diameter increased, whilst pressure increased up to 400-550 kPa. Gender of the operator had a significant impact on the results. Experience of the operators (years) were negatively correlated to volume of irrigant (all groups), to the duration of delivery (groups A, B) and to the average flow rate (group A). CONCLUSIONS: Finer diameter needles require increased effort to deliver the irrigant and result in higher intra-barrel pressure. The syringe and needles used tolerated the pressure developed. Irrigant flow rate should be considered as a factor directly influencing flow beyond the needle. Wide variations of flow rate were observed among operators. Syringe irrigation appears difficult to standardize and control.
C Boutsioukis; T Lambrianidis; E Kastrinakis; P Bekiaroglou
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2007-02-27
Journal Detail:
Title:  International endodontic journal     Volume:  40     ISSN:  0143-2885     ISO Abbreviation:  Int Endod J     Publication Date:  2007 Jul 
Date Detail:
Created Date:  2007-06-12     Completed Date:  2007-10-18     Revised Date:  2008-08-07    
Medline Journal Info:
Nlm Unique ID:  8004996     Medline TA:  Int Endod J     Country:  England    
Other Details:
Languages:  eng     Pagination:  504-13     Citation Subset:  D    
Department of Endodontology, Dental School, Aristotle University of Thessaloniki, Thessaloniki, Greece.
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MeSH Terms
Chelating Agents / chemistry
Dental Pulp Cavity / ultrastructure*
Edetic Acid / chemistry
Equipment Design
Irrigation / instrumentation
Observer Variation
Root Canal Irrigants / chemistry*
Root Canal Preparation / instrumentation*
Sex Factors
Sodium Hypochlorite / chemistry
Stainless Steel
Surface Properties
Time Factors
Transducers, Pressure
Reg. No./Substance:
0/Chelating Agents; 0/Root Canal Irrigants; 12597-68-1/Stainless Steel; 60-00-4/Edetic Acid; 7681-52-9/Sodium Hypochlorite

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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