Crystal guide scan protocol
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The document outlines three crystalguide scan protocols for dental imaging: optical, dual, and triple scan protocols, each suited for specific cases such as partially or totally edentulous patients. Each protocol consists of a series of steps involving scans of the patient and the scan appliances, with various options for using markers and wax-ups to enhance visualization. The protocols are designed to improve accuracy and planning for dental restorations.
Crystal guide scan protocol
- 2. CrystalGuide 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 2
- 3. CrystalGuide scan protocol • 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 3
- 4. CrystalGuide scan protocol • 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) 4
- 5. CrystalGuide scan protocol • Dual scan protocol Step 1 CT or CBCT scan of patient wearing the scan appliance with radiographic markers 5
- 6. CrystalGuide scan protocol • Dual scan protocol Step 2 CT or CBCT scan of scan appliance alone 6
- 7. CrystalGuide scan protocol • Dual scan protocol Step 3 Alignment of these both datasets and planning in relation to scan appliance 7
- 8. CrystalGuide scan protocol • Dual scan protocol The 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 8
- 9. CrystalGuide scan protocol • Triple scan protocol (Dr. Gross) Optical scan with 3 LEGO bricks positioned on the cast 9
- 10. CrystalGuide scan protocol • Triple scan protocol (Dr. Gross) Optical scan of teeth wax-up on master cast with 3 LEGO bricks 10
- 11. CrystalGuide scan protocol • 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. 11
- 12. CrystalGuide scan protocol • Triple scan protocol (Dr. Gross) Radiographic appearance of markers out of composite material 12
- 13. CrystalGuide scan protocol • Triple scan protocol Step 1 CT or CBCT scan of patient wearing the scan appliance with radiographic markers 13
- 14. CrystalGuide scan protocol • Triple scan protocol Step 2 CT or CBCT scan of scan appliance on cast with LEGO bricks 14
- 15. CrystalGuide scan protocol • Triple scan protocol Step 3 Alignment of the two optical scans with and without wax-up to these both datasets and planning in relation to casts 15