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Accuracy Evaluation of a 3D Model Generated from Patient-Specific Monocular Video Data

Now online in the Journal of Prosthodontics, Drs. Moe Matsuo, Yuichi Mine, Kazuko Kawahara, and Takeshi Murayama evaluated whether the monoscopic photogrammetry technique and smartphone-recorded monocular video data could be combined for use in maxillofacial prosthesis fabrication.

Smartphone video and laser scanning data were recorded for five volunteers and 3D models were generated from the data. The lengths of five nasal component parts were compared in the photogrammetric 3D models (test models) and the laser scanned 3D models (validation models).

To date, multiple studies have applied other digital technologies to the production process for maxillofacial prostheses. While some have been successful in clinical use, most of the workflows require highly specialized devices and are not widely available for use.

The results of this pilot study showed a significant difference in the nasal dorsum length between the test model and the validation model. There were no significant differences in nose height, nose breadth, nasal ala length, and nasal column length.

The authors conclude that the combination of smartphone-recorded video data and photogrammetry technique could be a practical alternative to making impressions without highly specialized technology in clinical practice.

Matsuo M, Mine Y, Kawahara K, Murayama T. Accuracy Evaluation of a Three‐Dimensional Model Generated from Patient‐Specific Monocular Video Data for Maxillofacial Prosthetic Rehabilitation: A Pilot Study. J Prosthodont 2020.

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