Dental lab basics & CAD CAM
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Transcript of Dental lab basics & CAD CAM
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Dental Lab Basics
By: Lokender Yadav
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Crown?
• A dental crown (also referred to as a cap) is a fixed prosthetic object that is cemented onto a tooth
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Purpose of Crown
• To cover a damaged tooth,
• To cover Dental Implant
• It also strengthens it,
• improving its overall appearance and alignment in the mouth.
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Types of Crown
• All ceramic (porcelain-based).
• Porcelain fused to metal.
• Gold alloys.
• Base metal alloys.
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What is PFM?
• Full form : Porcelain-fused-to-metal
• A metal alloy is used to create a thin cap ("substructure") that fits over the tooth.
• Porcelain is then fused over the substructure to form the shape of the crown and give it a white tooth-like appearance.
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PFM vs others
• Advantages of PFM's vs. all-metal crowns.(appearance)
• Advantages of PFM's vs. all-ceramic crowns(Strength)
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Disadvantage of PFM• They may wear opposing teeth.
• Porcelain breakage
• Challenges in creating a truly lifelike look.(Chalky White)
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Others….
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What else….
• Veneers
• Onlays
• Inlays
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Veneers.. a crown in which the restoration is placed over the prepared surface of a natural crown.
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Onlays & Inlays
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Clinic to Crown ……
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Process..
Clinic
impression
Lab
Crown (Prosthesis)
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Digital Vs Analog Dentistry
Speed Accuracy
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Analog or Classical Approach
Wax-up Casting Layering Final Crown
Hard model
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Digital Workflow(SDM)
Scan
Design
manufacture
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Scan
• Scope 1:
Polyvinyl
Siloxane(Physical impression)
Physical Transfer Lab Scanner
Speed & Accuracy factors are under risk……
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Scan
• Scope 2:
IOSCloud
Transfer Design
Speed & Accuracy factors are enforced……
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Design
Digital Impression I/P
Simulation Validation
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Manufacturing
Designed File I/P
Milling Sintering Finishing
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Complete CAD-CAM Work Flow
Step1
Prep(C)
Step2
Scan(C)
Step3
Design(L)
Step4
Mill(L)
Step5
Seat(C)
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