Abstract
Background: The aim of this study was to compare the force decay pattern of elastomeric chains and NiTi coil springs which were exposed to five different commercially available mouthwashes.Methods: In this in vitro study, 60 pieces of elastomeric chain (EC) and 60 NiTi closed coil springs (CS) were divided into 6 groups. The specimens were exposed to one of these mouthwashes twice a day for 60 seconds: Listerine, chlorhexidine, Orthokin, Persica, fluoride and artificial saliva as the control group. The elastomeric chains and NiTi springs were stretched so that they exert the initial force of 250 gr. Their force was measured on the 1, 7, 14 and 28 following days by means of a digital gauge.Results: Elastomeric chains and coil springs had force decrease over time, but EC' force reduction was greater with the highest reduction rate in the first week. However, in the CS group, the force decrease wasn't statistically significant in the first two weeks. After 28 days in the control groups, 49.8% of the initial force was remained in ECs while the value was 93.3% for CSs. In comparison between mouthwashes, in EC groups, in all mouthwashes except Persica, the remained force was statistically less than control group.Conclusion: Force degradation of elastomeric chains could be exacerbated by use of mouthwashes. About coil springs, force decay was also observed. However, it was not statistically significant. Force reduction was detectable after four weeks of coil springs usage, but in EC groups, the greatest reduction was after the first week.
Highlights
In orthodontic treatment different materials have been used as force delivery systems for space closure such as elastomeric chains and modules, and nickel titanium (NiTi) coil springs [1,2,3]
The force exerted by elastomeric chains and NiTi coil springs in different mouthwash groups at different time intervals are presented in Table 1 and 2 respectively
Both elastomeric chains and NiTi coil springs underwent force degradation over time which was significantly less in coil springs than chains
Summary
In orthodontic treatment different materials have been used as force delivery systems for space closure such as elastomeric chains and modules, and nickel titanium (NiTi) coil springs [1,2,3]. Elastomeric products are more frequently used force delivery system in orthodontics due to simplicity of handling, low chair time, low cost, patient comfort and being biocompatible [1,6,7] These materials are affected by different factors such as oral environment, duration of force application and nutritional factors. They undergo deformation and thereby their force decreases which results in an http://dentistry3000.pitt.edu impairment in the rate of tooth movement and elongation of treatment process [6,7,8,9]. The aim of this study was to compare the force decay pattern of elastomeric chains and NiTi coil springs which were exposed to five different commercially available mouthwashes
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
