INFLUENCE OF DIFFERENT PHYSICAL AND CHEMICAL FACTORS ON FORCE DEGRADATION OF ORTHODONTIC INTRAORAL ELASTICS – A REVIEW
Keywords:
latex orthodontic elastics, non-latex orthodontic elastics, intermaxillary elastics and force degradationAbstract
Correct selection of the dimension of orthodontic elastics, knowledge of their characteristics, monitoring of released forces at different time intervals, and good cooperation with patients are required for successful orthodontic treatment. During orthodontic therapy, elastics lose their initial strength due to various physical and chemical factors that change their structure. The purpose of this study is to determine, through the analysis of data from the available literature, whether there is a connection between the force degradation of different types of orthodontic intraoral elastics and the material from which they are made in different environments and time intervals. Material and method: To realize the set goals, an electronic search of published studies on this issue was conducted through the PubMed and Google Scholar databases. The literature search was performed according to the PRISMA guidelines with the following main eligibility criteria: only studies published in English and studies conducted in human populations. Of particular interest were clinical studies, in vitro studies, prospective and retrospective studies, and systematic reviews and meta-analyses. Results: there is clear difference of force degradation between latex and non-latex elastics especially after longer period of wear. Also the environment has influence on the force degradation of the elastics. Conclusion: In the world literature, there are various data on the influence of various physical and chemical factors on the degradation of the strength of intermaxillary elastics. All conducted studies indicate a positive correlation between the degradation of the strength of different types of orthodontic intraoral elastics from different manufacturers and the material from which they are made, different environments and time intervals. The analysis of the data from the available literature indicated that the most important parameter in the loss of strength is the elastic stretching time.
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