Abstract

MEJIA-RODRIGUEZ, Ana María; ALVAREZ-VARELA, Emery  and  ROLDAN, Samuel Ignacio. Reliability assessment of PAR index plaster and digital study models. CES odontol. [online]. 2013, vol.26, n.2, pp.49-58. ISSN 0120-971X.

Introduction and objective: The PAR index evaluates the results of orthodontic treatment in terms of improving the technical quality of care. It can be used to assess orthodontic treatment standards. A good occlusion has a nominal record of less than 5 PAR points. The aim of this study was to assess the reliability of the PAR index measured in physical and digital dental models for diagnosing occlusal problems. Materials and methods: This study was conducted in 21 study models of both female and male patients, with different age ranges between 6 and 17 years and three types of malocclusion (Class I, Class II and ideal occlusions) randomly selected from 480 models available in the IPF Research Group. In order to make digital measurements of study models bite registration with modeling wax were taken; manual measurements were made with a digital caliper and ruler for the PAR index; two researchers were blindly standardized at two different times in order to perform the measurements. Results: An excellent reliability of PAR index measurements was observed between physical and digital models with intraclass correlation coefficient (ICC = 0,99) and a confidence interval of 95%. (0,98; 0,99). Conclusions: PAR Index measurements are equally reliable when measured on plaster or digital models.

Keywords : PAR Index; Plaster models; Digital models.

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