protocolSection identificationModule nctId: NCT06280027, orgStudyIdInfo id: MUDHF_BK1, briefTitle: Effect of Midline Discrepancy and Crown Width Disporportion on Esthetics, statusModule overallStatus: COMPLETED, startDateStruct date: 2023-06-05, primaryCompletionDateStruct date: 2023-06-12, completionDateStruct date: 2023-12-22, studyFirstPostDateStruct date: 2024-02-28, lastUpdatePostDateStruct date: 2024-02-28, sponsorCollaboratorsModule leadSponsor name: Marmara University, class: OTHER, descriptionModule briefSummary: In the web-based cross-sectional study 180 participants were included. Half of them (n = 90) were patients (laypeople) of the university clinic and the remaining half were restorative dentists and prosthodontists with similar levels of clinical experience (at least 3 years of academic training).A frontal view full-face portrait image of a 25-year-old female was selected as a model for the study, with a smile exhibiting good dental alignment, a quite good midline position, and tooth size symmetry.The original image was digitally modified by a single restorative instructor using Photoshop CC (Adobe, USA) software program. The modifications were divided into three parts. The first part was the generation of midline discrepancy at different levels. The midline was digitally moved to the right side of the patient 1 - 4 millimeters, gradually. The midline movement was performed together with the whole maxillary arch.The second part was the generation of individual crown width disproportions. Accordingly, the mesiodistal width of the left central, lateral, and canine was digitally decreased one by one, gradually, while the width of the symmetrical teeth on the right side was simultaneously increased.The third part was the generation of distributed crown width disproportions. Accordingly, the total mesiodistal width of the left central, lateral, and canine was equally decreased, gradually, while the total width of the symmetrical teeth on the right side was simultaneously increased.In total, 15 images were displayed in random order to the participants including the original image. An online survey was generated to quantitatively evaluate the level of esthetic perception. Subsequently, the participants were asked to evaluate the level of smile esthetics of the presented random images, without being informed about the digital manipulations of the images. The participants were even not informed about the original image. They were expected to answer the question "How esthetic do you consider this smile?" The evaluation of each image was performed via a Visual analog scale VAS, ranging from point 0 (extremely not esthetic) to point 100 (extremely esthetic)., conditionsModule conditions: Esthetics, Dental, designModule studyType: OBSERVATIONAL, designInfo observationalModel: COHORT, timePerspective: CROSS_SECTIONAL, enrollmentInfo count: 180, type: ACTUAL, armsInterventionsModule interventions name: survey, outcomesModule primaryOutcomes measure: survey on midline discrepancy at different levels, primaryOutcomes measure: survey on individual crown width disproportions, primaryOutcomes measure: survey on distributed crown width disproportions, eligibilityModule sex: ALL, minimumAge: 18 Years, maximumAge: 70 Years, stdAges: ADULT, stdAges: OLDER_ADULT, contactsLocationsModule locations facility: Marmara University Faculty of Dentistry, city: İstanbul, zip: 34854, country: Turkey, geoPoint lat: 41.01384, lon: 28.94966, hasResults: False