The purpose of this study was to investigate the efficacy of using the index of orthodontic treatment need iotn as a tool to improve dental students ability to assess orthodontic treatment need fourth year dental students were randomly divided into control sham control and experimental groups stratified for mean grade point average. Efficacy of training dental students in the index of orthodontic treatment need article in american journal of orthodontics and dentofacial orthopedics 1225456 62 december 2002 with 69 reads. The iotn is a clinical index to assess orthodontic treatment need requirements of medical indices clinical validity and reliability objectivity and provision of quantitative data that can be analyzed. What is the iotn the iotn is used to assess the need and eligibility of children under 18 years of age for nhs orthodontic treatment on dental health grounds the british orthodontic society believes that if treatment has to be rationed then the iotn is an objective and reliable way to select those children who will benefit most from . The purpose of this study was to evaluate the ability of students in a us dental school to learn and apply two indices of orthodontic need the index of orthodontic treatment need iotn and the index of complexity outcome and need icon dental students were randomly selected and separated into three groups control iotn and icon
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