Photogrammetric reliability of frontal facial photographs with radiographs and anthropometric measurements

Abstract

To evaluate relationships between frontal cephalograms and photographic measurements of Indian population with anthropometric measurements and if frontal photographic analysis could be utilized with precision for orthodontic diagnosis. Material and methods: A cross-sectional ex vivo study was conducted on 300 subjects with age range of 18-25yrs. Standardized frontal cephalograms and photographs were obtained for all subjects and were analysed with Nemoceph 10.4.2 (Nemotec Dental Systems, Madrid, Spain) software program. Linear anthropometric measurements were recorded with the help of a digital Vernier caliper. 21 linear measurements were made, of which 10 were horizontal and 11 were vertical. Repeated measures of ANOVA followed by Bonferroni's Post hoc Analysis was used to compare mean values of horizontal and vertical parameters between 3 different methods. The level of significance was set at p < 0.05. Results: Statistically significant differences were found with most parameters. Between the analogous photographic, cephalometric and anthropometric measurements, only N′-Me' showed reliability with all three methods (p = 0.53,0.53,0.53). Conclusion: The photographic method has proven to be a repeatable and reproducible tool for only few parameters. Therefore, it cannot be considered a reliable diagnostic tool.

Concordance of the facial biotype between Bjork-Jarabak cephalometrics and photographic analysis of the facial opening angle

“…It has been suggested that the disagreements found in the determination of facial types by cephalometric and photographic analysis are due to the fact that cephalometric studies evaluate bone tissues in profile views, while photographs evaluate soft tissues in frontal views ( 14 ). Moreover, some studies have evaluated the concordance between clinical and cephalometric diagnosis and reported different results ( 20 - 24 ). However, no study has used the Bjork-Jarabak polygon to compare concordance with the photographic method in the Latin American population.…”

Photogrammetry in Dentistry: A Literature Review

“…[22] Перспективним напрямком наукового пошуку є вивчення можливостей поєднання потенціалу 3D обстеження у поєднанні з рентгенологічними методами, прикладом чого є напрацювання, що доводять доцільність інтеграції 3D фотографічних та рентгеногра-фічних методів, які, на думку авторів, пропонує багатообіцяючі клінічні перспективи. [23] Не менш цікавими є і нові технічні рішення при виконанні фотограмметрії, наприклад -отримання дзеркального відображення об'єкта одночасно у декількох ракурсах, а, отже, останнім часом науковці звертають увагу на можливість отримання дзеркальних відображень об'єкта, які можна використовувати окремо або разом із фотографіями самого об'єкта. [24] Перспективними є спроби інтеграції фотограмметрії та класичних діагностичних методів, наприклад -мікроскопії.…”