What to send:
– Prescription form;
– Model, impression or optical scan of the surface in .stl or .obj format.
– CT/CBCT scan data in DICOM format;
or
– Dual scan CBCT with the patient in occlusion:
• Scan 1 – CT scan of the patient wearing the denture with radio-opaque markers (scan appliance).
• Scan 2 – CT scan of the denture (scan appliance) alone still with the same markers on a radiolucent stand. Adjust the exposure as necessary to ensure the outline of the denture is visible.
– A physical or virtual wax-up / denture setup of the patient;
CT/CBCT scan data requirements:
– CBCT examination should be taken wearing a radiolucent impression tray filled with impression material (A – or C – silicon);
or
– CBCT examination should be taken using “Dual scan protocol” (link)
Impression:
Before sending the impressions to the laboratory perform its assessment.
Criteria:
– clear display of all the gingival grooves, alveolar bone and surrounding soft tissues up to transitory fold;
– absence of pores in the impression;
– good adhesion of the impression material to the tray;
– the inner surface of the impression should not contain thinned or bowed areas;
– the impression should be free of saliva and should not contain traces of blood.
The impression should be decontaminated through disinfection immediately after removal from the patient`s mouth.
Model(s):
Stone model (with no defects or voids)
Optical scan:
.stl file generated from an intraoral scan (with no tears or overlapping layers);
If you do not have access to an intraoral scanner a dental lab may be able to create a .stl file from your traditional impression or stone model using a benchtop scanner.
Surgical (drilling) protocol:
Pilot-, Full- and various intermediate protocols are possible.
