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Updated: Jan 10, 2026
Measuring the Complete-arch Distortion of an Optical Dental Impression
Published on: May 30, 2019
Accuracy of a smartphone app and photogrammetry algorithm in complete arch digital implant capture: An in vivo
Andrea Santamaría-Laorden1, Raquel Castillo-Oyagüe2, Alicia Martínez-Marugán1
1Assistant Professor, Universidad Europea de Madrid, Faculty of Biomedical and Health Sciences, Department of Dentistry, Madrid, Spain.
Statement Of Problem:
A photogrammetry algorithm integrated into a smartphone application has been proposed as an alternative to photogrammetry scanners for complete arch digital implant recording. Clinical studies, however, are lacking.
Purpose:
The purpose of this clinical study was to evaluate the accuracy of a photogrammetry app for complete arch prostheses supported by 6 implants.
Material And Methods:
A total of 8 participants with 10 completely edentulous arches with 6 multiunit implant abutments were recruited. For each participant, 5 recordings were made using a photogrammetry app (PIC app; Pic dental), and 1 recording with a photogrammetry device (PIC system; PIC dental). From the resulting standard tessellation language (STL) files, linear and angular Euclidean distances were recorded. A statistical analysis of the measurements obtained was used to determine their trueness and precision. The Shapiro-Wilk tests were run to analyse the trueness data, and the Levene test was used to assess the precision values (α=.05).
Results:
The mean ±standard deviation absolute difference between the PIC system and PIC app was 21 ±16 µm and 0.20 ±0.17 degrees. The interimplant distance did not signifficantly affect linear trueness (P>.05) or angular trueness (P>.05). The arch type did affect linear trueness P<.001, but did not affect angular truness (P=.310).
Conclusions:
The results suggested that the photogrammetry app was sufficiently accurate for recording implant locations in complete arch prostheses supported by 6 implant abutments.
