Comparison of two cleaning methods for Wave One files.
Research type
Research Study
Full title
The comparison of two methods of cleaning Wave One endodontic files after endodontic procedures ex vivo.
IRAS ID
146943
Contact name
Carol Dewhurst
Contact email
Sponsor organisation
University of Chester
Duration of Study in the UK
0 years, 7 months, 30 days
Research summary
Contemporary endodontic practice involves using rotary nickel titanium files to prepare a root canal system. Historically this has involved the use of multiple rotary files discarded after use.
Single file systems are a relatively new technique for shaping root canals.
Introduced in 2011 the Wave One file uses a modified Nickel Titanium- M Wire, and a new form of file rotation, multiple reciprocation, to complete a 360 degree rotation.
The combination of the new alloy and multiple reciprocation enable the files to shape most canals with only one file, saving time and cost but maintaining safety.
Manufacturer’s instructions state that a gentle pecking motion of 2-3mm strokes is used to passively advance the file until it is unable to advance. Then withdraw the Wave One file, remove the debris and inspect its cutting flutes, irrigate and repeat steps until the coronal two-thirds of the canal have been shaped.
During the advancement of the file it accumulates a considerable amount of debris, mostly dentine. Manufacturer’s instructions offer no advice on the methods to clean the debris from the file, ensuring it maintains its cutting efficiency.
In this study two cleaning methods are used to remove the dentine debris, a commonly used method, the use of a dry gauze pad and one that had not been studied before, the use of an ultrasonic tip. The two methods are compared after the files have been used on extracted teeth.
For the purpose of the study the researcher will need to collect extracted human teeth which will be used to simulate the clinical procedure of the root canal treatment. The files used will be cleaned by two methods, the results recorded, studied and statistically analysed in order to determine the best cleaning method.
The teeth will be collected from patients of the researcher's practice undergoing routine extractions. The participants will not have any further involvement in the research.
The study will be conducted in the dental practice of the researcher.REC name
London - Dulwich Research Ethics Committee
REC reference
16/LO/1391
Date of REC Opinion
27 Jul 2016
REC opinion
Further Information Favourable Opinion