LAUSR

Aim: The Aim of the study is to check the effects of variation in temperature on the Permanent deformation of elastic chains. Objective: To investigate the effect of variation in temperature on the permanent deformation of elastic chains. Materials and method: Samples of elastic chains are taken and subjected to various temperature for 5 minutes 4 times a day .Samples are put under 5 groups;Group 1 was subjected to a temperature of 0°,Group 2 was subjected to a temperature of 20°,Group 3was subjected to a temperature of 40°,Group 4 was subjected to a temperature of 60°,Group 5 was subjected to a temperature of 80°.Background: In orthodontic treatment,elastomeric chains exhibit good elasticity they are used for retraction,space closure.The main advantage of these elastomeric chains are they are cost efficient,ease of application, patient and clinician comfort.Any alteration in the mechanical properties of elastomers affects the function of the chains.It s influenced by the change in temperature due to consumption of very cold to very hot food.Constant exposure to such varying temperatures may affect the elastomers and lead to deformation.