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Lab Fabrication
The Scan Appliance is seated on the articulated model. The pin is opened
4 mm to 5 mm to separate the teeth. Capture Clear Bite is injected onto
the occlusal surfaces of the entire arch and the articulator is closed
(Fig. 2). Once the material has set, the Scan Appliance, scan index and
models are shipped to your office.
Chairside Fabrication
If the lab does not have articulated models, the scan index can easily be
fabricated chairside. First, ensure the Scan Appliance is fully seated in the
patient’s mouth. For partially edentulous cases, inspection windows provide
a means to verify seating (Fig. 3). Next, inject an ample amount of
Clear Bite around the entire mandibular arch, as if you are making a standard
bite registration. Guide patient into closure so the occlusal surfaces
of the Scan Appliance and the opposing dentition are slightly separated.
Figure 2: Lab-fabricated Scan Appliance or Radiographic
Index
If you are sending the patient to a radiology lab for his or her scan, ensure
the patient and the radiology technician are familiar with the procedure
for proper seating of the Scan Appliance and scan index.
If a dual-scan protocol is being performed, the patient is scanned with
the Scan Appliance and scan index (Fig. 4a). A second scan is done of the
Scan Appliance alone (Fig. 4b). Don’t forget to remove the scan index!
Figure 3: The cusp tip can be seen through the inspection
window.
conclusion
Proper understanding and use of the Scan Appliance/Radiographic Index
will ensure complete seating of the Scan Appliance and help your Digital
Treatment Planning and guided surgery cases go smoothly.
Figure 4a: The patient wears a Scan Appliance and scan
index during a CT/CBCT scan.
Figure 4b: A second scan is done of the Scan Appliance
alone.
– The Role of the Scan/Radiographic Index – 17