Force Degradation of Orthodontic Elastomeric Chain due to Commonly Consumed Liquids: An in vitro Study

Abstract

ABSTRACT Introduction Forces delivered by elastomeric chains are not constant and degrade overtime. The degree of degradation could result in forces that fall below the threshold value, precluding any therapeutic effect. Correct evaluation of degradation of force of these materials under various environmental conditions is the need of hour. Objective To analyze and compare the effects of commonly consumed liquids, such as Cola, tea and mouthwash, on the force degradation of orthodontic elastomeric chains was conducted. Materials and methods An in vitro study was done to assess factors which affect the decay properties of the three elastomeric modules (Ormco Power Chain, 3M Unitek Alastik Chain and American Orthodontics) in the following food stimulants: black tea, milk, aerated drink, mouthwash and artificial saliva. Two different module lengths (long and short) of each product were used for the initial load-comparison study and force decay was evaluated over 21 days at constant extension and at decreasing extension. Means of percentage change in tensile strength were calculated and analyzed using one way analysis of variance (ANOVA) with Tukey's correction for multiple group comparisons. p < 0.05 was considered to be statistically significant. Results The evaluated force degradation in percentage in tensile strength on 21 days post-treatment in tea was significantly higher in product A compared to products B and C with product type short. The evaluated force degradation in percentage in tensile strength on 21 days post-treatment in Cola was significantly higher in products A and C as compared to product B with product type short. The force degradation of product B was significantly less compared to the products A and C initially. However, it degrades at the end of the 21 days and is equivalent with other products. Conclusion Irrespective of the solvents used, the force degradation varies for different products. How to cite this article Nachan RA, Kalia A, Al-Shahrani I. Force Degradation of Orthodontic Elastomeric Chain due to Commonly Consumed Liquids: An in vitro Study. World J Dent 2015;6(1):31-38.