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CrystalGuide Scan ProtocolCrystalGuide Scan Protocol

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CrystalGuide scan protocolCrystalGuide scan protocol

• Three different possibilities regarding indication:1. Optical scan protocol

1. Patient is scanned using a CBCT without scan appliance intraorally

2. Master cast is optically scanned in the laboratory and delivered as stl-file, aligned to visible tooth structure on patient scan

Indication: only partially edentulous cases with almost no metal artefacts and at least 5 teeth remaining

Optional: second optical scan of same cast with wax-up to visualize planned tooth positions

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• Three different possibilities regarding indication:2. Dual scan protocol (classical for edentulous)

1. Patient is scanned with a CBCT with scan appliance intraorally

2. Scan appliance is scanned alone on the CBCT

Indication: totally edentulous cases

CrystalGuide scan protocolCrystalGuide scan protocol

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• Three different possibilities regarding indication:3. Triple scan protocol (Dr. Gross)

1. Patient is scanned with CBCT with scan appliance intraorally

2. Scan appliance is scanned on cast with 3 LEGO bricks

3. Master cast with 3 LEGO bricks is optically scanned as stl-file

4. Optional: second optical scan of same cast with wax-up to visualize planned tooth positions

Indication: main protocol for partially edentulous case(Lego bricks are available at children’s toy stores)

CrystalGuide scan protocolCrystalGuide scan protocol

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• Dual scan protocol

Step 1

CT or CBCT scan of patient wearing the scan appliance with radiographic markers

CrystalGuide scan protocolCrystalGuide scan protocol

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• Dual scan protocol

Step 2

CT or CBCT scan of scan appliance alone

CrystalGuide scan protocolCrystalGuide scan protocol

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• Dual scan protocol

Step 3

Alignment of these both datasets and planning in relation to scan appliance

CrystalGuide scan protocolCrystalGuide scan protocol

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• Dual scan protocolThe current denture can be modified and utilized as the scan appliance or a replica can be fabricated.

Round holes are created in specific points on the denture or replica using a #6 round bur then filled with gutta percha creating radiographic alignment markers.

Current denture with markers Replica denture with markers

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• Triple scan protocol (Dr. Gross)Optical scan with 3 LEGO bricks positioned on the cast

CrystalGuide scan protocolCrystalGuide scan protocol

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• Triple scan protocol (Dr. Gross)

Optical scan of teeth wax-up on master cast with 3 LEGO bricks

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• Triple scan protocol (Dr. Gross)Easy scan appliance on cast with radiographic markers in the scan stent. Markers can be fabricated of gutta percha or dental composite filling material as both materials are radiopaque. Acrylic used for denture baseplates may be used for the bulk of the stent as this material is radiolucent.

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• Triple scan protocol (Dr. Gross)Radiographic appearance of markers out of composite material

CrystalGuide scan protocolCrystalGuide scan protocol

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• Triple scan protocol

Step 1

CT or CBCT scan of patient wearing the scan appliance with radiographic markers

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• Triple scan protocol

Step 2

CT or CBCT scan of scan appliance on cast with LEGO bricks

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• Triple scan protocolStep 3

Alignment of the two optical scans with and without wax-up to these both datasets and planning in relation to casts

CrystalGuide scan protocolCrystalGuide scan protocol