The document discusses rapid prototyping techniques used in dentistry. It describes how 3D models can be created from medical imaging scans using CAD software and then fabricated using stereolithography, fused deposition modeling, or laser sintering. Examples provided include creating prosthetic ears and noses as well as surgical guides for reconstructive procedures. New applications discussed are ceramic scaffolds for bone replacement and cellular photopolymer structures.

1. INDIAN DENTAL ACADEMY
Leader in continuing dental education
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2. CONTENTSCONTENTS
 INTRODUCTIONINTRODUCTION
 CLASSIFICATIONCLASSIFICATION
 PROCEDUREPROCEDURE
 PROCESSESPROCESSES
 CLINICAL CASESCLINICAL CASES
 NEW MATERIALSNEW MATERIALS
 CONCLUSIONCONCLUSION
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3. INTRODUCTIONINTRODUCTION
 The manufacture of dimensionally accurateThe manufacture of dimensionally accurate
physical models of human anatomy derived fromphysical models of human anatomy derived from
medical image data using a variety of Rapidmedical image data using a variety of Rapid
Prototyping technologies.Prototyping technologies.
 A group of techniques used to quickly fabricate aA group of techniques used to quickly fabricate a
scale model of a part or assembly using three –scale model of a part or assembly using three –
dimensional Computer Aided Design (CAD)dimensional Computer Aided Design (CAD)
data.data.
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4. Medical Imaging
• CT MRI
3 – D Reconstruction of
Tomographic data
Laser surface
digitizing
CAD modeling
•Repair of incomplete data sets
•Fitting of prosthesis pattern
Point data
RP master pattern fabrication
Casting
•Color matching
Actual prosthesis
DATA
AQUISITION
CAD
REMODELIN
G
RP
FABRICATIO
N
CASTING &
FINISHING
PROCESS CHAIN
2-D slice data
3D
surface
model
STL model
Pattern
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5. 3D Mesh Model
CT image
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6. MRI image
3D Mesh Model
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7. Point– cloud data Surface regeneration
CAD Model Fabricated pattern
Laser Surface Digitizing
Positioning and fitting of
Prosthetic Ear in CAD
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8. RAPID PROTOTYPING
Additive Additive / Subtractive Subtractive
LIQUID POWDERS SHEETS
Photopolymers Molten Materials
Shape Deposition
manufacturing
CNC machining
Extrusion InkjettingRaster
scanning
Vector
scanning
Fusion by
Inkjetting Binder
Fusion by Laser
Stereo-
lithograph
y
Digital light
processing
polyjet
Fused
deposition
modelling
Multi jet
modelling
Selective Laser
Sintering
3D - Printing
Laminated object manufacturing
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9. STEREOLITHOGRAPHYSTEREOLITHOGRAPHY
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10. FUSED DEPOSITIONFUSED DEPOSITION
MODELINGMODELING
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11. LASER SINTERINGLASER SINTERING
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12. 3 D PRINTING3 D PRINTING
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13. Prosthetic EarProsthetic Ear
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14. Colored pins for repositioning
diverse angled images
Laser Scanner
8 Random positions of laser scanner
Digitalised image is copied and mirroredwww.indiandentalacademy.comwww.indiandentalacademy.com

15. Prosthetic Nose
UV-curve network Docking of the Nose Fitting of pattern
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16. SURGICAL CASESURGICAL CASE
3-D virtual skull model STL model of the skull
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17. Temporal component Mandibular component
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18. Before reconstruction After reconstruction
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19. Analysis of ErrorsAnalysis of Errors
CT Gantry Tilt
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20. Stair-step artefact
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21. Partial removal of artefact
by Image editing.
Metal artefact
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22. Distinct movement artefact Surface roughness
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23. DENTAL CASTINGSDENTAL CASTINGS
Laser measured`point clouds’of tooth crowns Rapid Prototyping
Crowns
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24. NEW MATERIALSNEW MATERIALS
Ceramic load-bearing scaffolds that can be used to replace damaged bones.
To study how osteoporosis affects bone strength.
Wax casting patterns for implants
( 90 percent open space )
Cellular structures made of
Photopolymerisable Polymers
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25. CONCLUSIONCONCLUSION
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26. STEREOLITHOGRAPHYSTEREOLITHOGRAPHY
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27. STEREOLITHOGRAPHYSTEREOLITHOGRAPHY
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28. STEREOLITHOGRAPHYSTEREOLITHOGRAPHY
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29. Analysis of ErrorsAnalysis of Errors
CT Gantry Tilt
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30. Thank you
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