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Flapless implantology Three-dimensional planning based on CT or DVT

Part 2

Diagnostic templates consist of radiopaque artificial teeth or may have gutta-percha radiopaque cylinders that the patient wears during the CT examination. These templates enable the dentist to evaluate available bone height at the proposed implant sites.

The cross-sectional view of the CT scan allows the clinician to determine implant size, length, and angulation.

When bone augmentation in the maxillary sinus is needed to place implants, CT scanning of the sinus may be used to estimate the amount of graft material required for the ideal volume of sinus graft material.

A 3D evaluation of the implant’s proximity to vital structures can also be done. However, CT scanning is expensive, which can be a disadvantage.

Radiographic splints serve as a reference while 3D imaging data are being taken. Splints may use reference bodies and provide obligatory radiopaque crowns, which are needed for the alignment of the implants. Radiographic splints do not contain any guiding elements for implants. To guarantee a perfect anatomical fit of the splint in situ, radiographic splints are important.

This may be difficult in edentulous patients, particularly in the mandible. Therefore, stabilizing pins or temporary implants may be used. Any unining pins to temporary implants may be used. Any unintended relative movement of the radiographic splint during the radiographic evaluation can directly lead to erroneous planning and, therefore, counteracts the precision provided by the method.