A Retrospective Study Assessing the Frequency of Friction type Retraction Mechanics in Patients Undergoing Pre Adjusted Edgewise Therapy

Tooth movement occurs by various mechanisms. Force is the basic component when a tooth is retracted or slides through the arch wire is called friction mechanics. Use of elastic modules with signature wire, elastic chains, closed coil springs are used in friction mechanics whereas in frictionless mechanics, force is generated intrinsically,by incorporation loops in archwire energy stored in loops are released in slow and continuous manner. The objective of the study is to evaluate the frequency of friction type of mechanics used for space closure in patients undergoing preadjusted edgewise therapy.A retrospective study was conducted on patients who visited the department of Orthodontics from March 2019 to march 2020.Records of the patients who underwent preadjusted edgewise therapy were taken from the electronic data base..Case sheets were evaluated. The compiled data was statistically analysed with SPSS software.In this study we can contemplate that friction based retraction mechanics were more prevalent than frictionless mechanics in preadjusted edgewise therapy.The results of the study show maximum frequency in friction type mechanics.