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Magnification and fine motor skill: effect on dental students

Grant number: 16/22870-5
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): June 01, 2017
Effective date (End): December 31, 2018
Field of knowledge:Health Sciences - Dentistry - Social and Preventive Dentistry
Principal Investigator:Patrícia Petromilli Nordi Sasso Garcia
Grantee:Vinicius Perassoli Menegazzo
Home Institution: Faculdade de Odontologia (FOAr). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil


This study aims to observe the effect of different magnification systems on fine motor skills. An experimental laboratory study will be conducted where the dependent variable is the fine motor skill, measured by Precision Manual Dexterity test and the independent variable is the magnification system in 4 levels (direct view; loupe monocular, loupe with Galilean system; loupe with Keplerian system). The loupe monocular will be BioArt, 3.5 increase, loupe with Galilean and Keplerian system will be the binocular Ymarda, 3.5 and 4.0 of increase, respectively. The sample will be composed by students from 5th year of Araraquara School of Dentistry. The Precision Manual Dexterity will consist of penetrating one #10C-File accurately in a series of targets printed on a sheet of soft paper. A calibrated researcher will assign scores according to the accuracy of penetrations. In order to verify the reliability of these evaluations, an intra-examiner reproducibility study will be conducted, where the researcher will examine 20 sheets of test twice. The intra-examiner agreement will be estimated by intraclass correlation coefficient (r) and this study will consider appropriate intra-examiner agreement level at least classified as "Good". A descriptive statistical analysis will be performed. After checking the normality and homoscedasticity assumptions, the analysis of variance (ANOVA) one factor and Tukey post-test will be performed. The significance level will be 5%.