This document discusses artificial teeth used in dentistry. It covers the main components of dentures, which are acrylic and porcelain teeth. Acrylic teeth are produced through dough molding or injection molding techniques using a highly cross-linked resin for strength and resistance to crazing or cracking. Porcelain teeth are manufactured according to required shapes and sizes using disposable molds with mechanical attachments like pins or holes. Porcelain teeth have aesthetic and hardness advantages over acrylic teeth but can fracture or chip more easily and are more difficult to adjust through grinding. Both materials must meet requirements for appearance, strength, and compatibility with denture bases and the oral cavity.

1. General Dentistry &
Artificial Teeth
ASST PROFESSOR
Dr Mumtaz ul Islam
B.Sc. BDS. MHR. M.Phil.

2. General
Dentistry

3. Impression and
Model

4. Model or Cast

5. Die

6. Posterior
Bridge

7. Anterior
Bridge

8. Crown

9. Dental Implant

10. Cast Partial
Denture

11. Complete
Denture

13. GV Blacks
Classification

14. Artificial Teeth
 Dentistry
 Common perception
 False teeth
 Main component of a denture
 Acrylic and porcelain

15. Requirements
 Appearance
 Attachment & compatibility
 Low density
 Strength
 Hard enough for masticatory forces
 Allow grinding with burs for adjustment

16. Acryilc Teeth
Production
 Produced in moulds (metal, reuseable)
 Dough moulding technique
 Injection moulding
 Highly cross linked resin
 Resistant to crazing
 Tooth coloured pigments no pink colour

17. Porcelain Teeth
Manufacturing
 According to required shapes and sizes
 Moulds kept 30% larger than required
 Disposable moulds
 Mechanical attachments
 Metallic pins or holes

18. Properties
 Aesthetic
 Density 1.2 & 2.4
 Coefficient of thermal expansion (acrylic 80 porcelain 7)
 Modulus of elasticity (GPa) 2.5 & 80
 Hardness (VHN) 20 & 500
 Occurrence of radioactive compounds (uranium-238)

19. Properties
Contd.
 Wear in acrylic teeth especially in dusty or gritty environment
 Acceptable appearance
 Convenient handling
 Greater toughness
 compatibility
 Surface stains incorporation

20. Disadvantages
 Bonding, cracking or crazing of denture base
 Fracture and chipping of porcelain teeth
 Difficult to grind for adjustments
 Porcelain teeth transmits excessive force
 Contraindicated for resorbed ridges and diminished interocclusal
distance
 Surface stains are less stable in acrylic teeth