Implementing magnification during pre-clinical training: Effects on procedure quality and working posture

Pazos, Júlia Margato [UNESP]Wajngarten, Danielle [UNESP]Dovigo, Lívia Nordi [UNESP]Garcia, Patrícia Petromilli Nordi Sasso [UNESP]2020-12-122020-12-122020-08-01European Journal of Dental Education, v. 24, n. 3, p. 425-432, 2020.1600-05791396-5883http://hdl.handle.net/11449/198796Objective: The objective of this study was to evaluate the effects of magnification on the quality of two pre-clinical procedures, class I cavity preparations and composite resin restorations, and to evaluate the working posture. Methods: This was an experimental laboratory study. The response variables were the quality of cavity preparations and Class I restorations as well as the working posture adopted during the execution of these procedures. The independent variables were the magnification system under four levels (unaided visualisation, the use of a simple loupe, the use of a Galilean loupe and the use of a Keplerian loupe) and the artificial teeth treated. Class I cavity preparations and restorations (N = 320) were performed using standardised procedures, and the quality achieved was evaluated using pre-established criteria. Working posture was recorded using digital video cameras and was evaluated using the Compliance Assessment of Dental Ergonomic Posture Requirements (CADEP). A two-factor analysis of variance (ANOVA) and multiple comparison test were performed (α = 0.05). Results: The quality of cavity preparation did not differ significantly amongst the different magnification systems (P = 0.082). Galilean and Keplerian systems had a positive impact on restoration quality only for the left mandibular first molar (P = 0.04). Higher posture scores were observed when Galilean and Keplerian loupes (P = 0.01) were used, regardless of the tooth being treated. Conclusion: The use of Galilean and Keplerian magnification lenses did not affect the quality of the pre-clinical procedures performed whilst improved the scores of ergonomic posture.425-432engergonomicsmagnificationoccupational healthrestorative proceduresvisual acuityImplementing magnification during pre-clinical training: Effects on procedure quality and working postureArtigo10.1111/eje.125172-s2.0-85084218353