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Image distortion of intra‐oral photographs: The root coverage model
Author(s) -
Kerner Stephane,
Garabetyan Julia,
Le Roch Sarah,
Damman Daniel,
Bouchard Philippe
Publication year - 2020
Publication title -
journal of clinical periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.456
H-Index - 151
eISSN - 1600-051X
pISSN - 0303-6979
DOI - 10.1111/jcpe.13294
Subject(s) - distortion (music) , coronal plane , root (linguistics) , digital camera , parallax , computer vision , position (finance) , artificial intelligence , computer science , optics , physics , medicine , computer network , amplifier , linguistics , philosophy , bandwidth (computing) , finance , economics , radiology
Aim Clinical photographs have been advocated in studies dealing with the quantity of root coverage. Changes in different angles of the camera when taking a photograph may lead to parallax errors resulting in inaccurate measurements. The aim of this study was to explore the distortion of the photographs according to the shooting angle. Methods A dental simulation model with a recession defect on tooth 21 was used. Photographs were taken with a digital camera at 5° intervals between 0° to 35°, by shifting the position of the model. Recession depth and root surface area were calculated with ImageJ and implemented in a mathematical model. The relationship between the experimental measurements and the outcomes of the mathematical model was statistically evaluated. The model was confirmed by clinical data. Results When the central axis of the lens of the camera focused on the experimental tooth is within a cone angle ≤36°, the maximum distortion of the recession area ranges from 0% to 14%, the maximum percentage occurring when the angle is coronal to the central axis. Conclusions Photographs without an external device connected to the camera provide a valuable support for root coverage assessment when using ImageJ as a measuring tool.