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BONE-SUPPORTED SURGICAL GUIDE

BONE-SUPPORTED SURGICAL GUIDE
BONE-SUPPORTED SURGICAL GUIDE

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 (uncompressed, highest image quality);
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:

– CT/CBCT examination should be taken using a bite fork/block (not in occlusion).
– All removable prosthetics should be removed.

For edentulous patients:

– 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.

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