Bolton`s analysis using a photogrammetric method on occlusal photographs

Authors : Ashwin PRAKASH, Prasad CHITRA

Pages : 55-61

Doi:10.26650/eor.20200005

View : 10 | Download : 7

Publication Date : 2020-05-30

Article Type : Research Paper

Abstract :Purpose The aim of the study is to present a photogrammetric technique using standardized occlusal photographs to perform Bolton’s analysis and assess reliability of this new method with plaster study casts. Materials and Methods The study was conducted on 16 subjects insert ignore into journalissuearticles values(8 males, 8 females);, aged 18-25 years. Standardized occlusal photographs and plaster study casts were obtained. The occlusal photographs were calibrated in Nemoceph® software. Mesio-distal dimensions of all teeth up to first molars were calculated and Bolton’s analysis was performed. Similarly, a digital calliper with 0.1 mm sensitivity was used to measure mesio-distal dimensions of all teeth on plaster study casts to perform Bolton’s analysis. 28 parameters were measured on study models and corresponding occlusal photographs. Paired t test and intraclass correlation tests were carried out to test validity and reliability of the photogrammetric method. An intraclass correlation test was calculated for 4 derived parameters to test reliability of Bolton’s analysis measurements obtained from occlusal photographs as compared to study models. Results All 28 parameters showed a statistically significant and excellent correlation insert ignore into journalissuearticles values(r>.80); in the Intra Class Correlation test. 4 variables used to calculate Bolton’s analysis showed statistically significant correlation insert ignore into journalissuearticles values(r>.96); in the intraclass correlation test. Conclusion Photogrammetry is a reliable tool to measure mesio-distal tooth size. Bolton’s analysis from standardized occlusal photographs using the described photogrammetric technique can be used as an effective clinical tool.
Keywords : Photogrammetry, Boltons analysis, Ophotograph, Nemoceph, Tooth dimensions