Force decay of intermaxillary orthodontic elastics: in vitro study

Abstract

Introduction. Orthodontic elastics are widely used in orthodontic treatment. It’s been proved that they have advantages such as low cost, ease of use, but also disadvantages, mainly force decay in time and increased entrapment of biofilm. Amount of the force is of extreme significance. This force can be altered by physical or chemical factors. Material and Methods. Latex elastics in 3 different diameters were selected for this study. Each elastic was stretched and placed on hooks that are at specified distances that equal 3 times the diameter of each elastic. The forces produced by stretching was measured using tension gauge and the measurement were taken at specific time intervals of 0h, 3h, 12h, 24h. The same process was repeated for elastics in dry and artificial environment. Results. Elastics in the dry environment showed progressive force decay cause by stretching over time. Just after 3 hours force decay between 6,07% and 8,75% was observed. The biggest loss of force between 13,61 — 16,13 % was measured after 24 hours. Compared to the dry environment, an even more significant force decay was observed in the artificial saliva. After first 3 hours force loss was between 4,99% — 9,22%. The biggest force decay was observed after 24 hours and it was 5 % higher compared to dry environment. Conclusions. 1) The artificial saliva environment and time of exposure to it, have a negative effect on the properties of elastomeric. 2) To maintain the effective orthodontic strength of elastics, they should be replaced every 12 hours.

Nanotechnology for Dentistry: Prospects and Applications

“…What is interesting, malocclusions can be a primary cause of gastrointestinal problems. In orthodontic treatment, arch wires, power chains, elastomeric ligatures and many others are commonly used to move teeth [ 101 , 238 ]. Nanotechnology is garnering more attention to form new-shape memory materials (i.e., providing lower ion leaking), brackets (i.e., preventing caries formation) and ligatures (i.e., wearing resistance) with better properties.…”

Evaluation of the Loss of Strength, Resistance, and Elasticity in the Different Types of Intraoral Orthodontic Elastics (IOE): A Systematic Review of the Literature of In Vitro Studies

“…Considering that this review focused on the physical and chemical characteristics of the elastic bands and especially their force, as analyzed in vitro, it would be interesting to review and compare studies in which different elastic forces are analyzed as they affect the bone and periosteum, to evaluate the optimal force to apply to the teeth [23][24][25].…”