CASE REPORT
Application of photogrammetry to CAD/CAM fabrication of an implantsupported
prosthesis in an edentulous mandible – case report
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Zakład Protetyki Stomatologicznej, Uniwersytet Medyczny w Łodzi
Submission date: 2025-11-21
Final revision date: 2026-02-24
Acceptance date: 2026-03-19
Publication date: 2026-03-19
Corresponding author
Oliwia Ligocka
Zakład Protetyki Stomatologicznej, Uniwersytet Medyczny w Łodzi
Prosthodontics 2026;76(1):25-33
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ABSTRACT
Implantoprosthetic treatment of edentulous
patients may involve the use of conventional and
digital methods. Conventional methods provide
us with high degree of accuracy regarding the
fit of the prosthesis to the implant. However, they
are burdened with disadvantages such as time
consumption, impression deformity or significant
discomfort for the patient during the procedure.
These inconveniences can be eliminated with
digital methods. Yet, relying exclusively on digital
impressions obtained with intra-oral scanner
will not let us achieve adequate accuracy. The
PICDental system, which combines the accuracy
of conventional methods with the comfort of
digital methods, seems to offer the satisfactory
solution. It includes transfers in the shape of flags
and extra-oral PIC Camera. Coded transfers are
screwed directly to the implants. The camera,
positioned 15-30 cm from the patient’s mouth,
takes 50-60 images of each pair of implants;
their superimposition will produce a 3D image.
The device enables the registration of position
and orientation of the implants with the accuracy
of 23-99 micrometers. In order to obtain a full
digital impression, additional scans of soft tissues
of the prosthetic base are necessary followed by
convergence into an STL file format.