This document discusses dental amalgam and composites for dental restorations. It indicates that amalgam is used for class I, II lesions and non-aesthetic areas, while composites can be used for all classes of restorations and for aesthetic purposes. Principles of tooth preparation include preserving tooth structure and having walls perpendicular to forces. Different pulp protection materials like liners, sealers and bases are required depending on the depth of the cavity preparation. Glass ionomer cement is introduced which is used for various applications like restorations, liners and fissure sealants. Amalgam carving instruments include discoid, hollenbeck and amalgam knives.

2. DENTAL AMALGAM
 VIDEO

5. Dental composites
 video

10. INDICATIONS
AMALGAM
 CLASS I, II
 Nonesthetic cervical lesions
 Core build up
 Temporary/caries control
restorations
 Patient sensitivity to other
materials
COMPOSITES
 CLASS I, II, III, IV, V
 Esthetic enhancements
 Hypocalcified areas
 Partial/full veneers
 Luting agents

15. PRINCIPLES OF TOOTH PREPARATION

18. Features:
 Preserving cusps & marginal ridges
 Flat pulpal floor
 Pulpal & gingival walls perpendicular to occlusal forces
 Rounded internal and axiopulpal line angles (for class II)

19. Extend the proximal margin to provide clearance from adjacent tooth

21. Step 6: PULPAL PROTECTION
 To provide 2 mm of insulation between pulp &
restorative material.
 Liners
 Sealers
 Bases

23. DEPTH OF
CAVITIES
AMALGAM COMPOSITES GOLD INDIRECT
ESTHETIC
RESTORATIONS
SHALLOW
(RDT >/= 2mm)
Dentin sealer/
desensitizing
agent
Nil NIL
(RMGI for
cementation)
Nil
(DBA + Resin
cement for
cementation)
MODERATE
RDT 0.5–2 mm
RMGI base +
dentin sealer
Nil
(DBA)
NIL
(RMGI for
cementation)
Nil
(DBA + Resin
cement for
cementation)
DEEP
RDT < 0.5mm
0.5 – 0.75mm
layer of
Ca(OH)2 +
RMGI bae
0.5 – 0.75mm
layer of
Ca(OH)2 +
RMGI base
+DBA
0.5 – 0.75mm
layer of
Ca(OH)2 +
RMGI base
0.5 – 0.75mm
layer of Ca(OH)2
+ DBA

24. GIC (FLOURIDE RELEASE)
 Other names:
• Polyalkenoate cement
• Manmade dentin
• Dentin substitute
• Alumino Silicate Polyacrylic Cement (ASPA)

25.  It was introduced by Wilson and Kent in 1969.
47.
CLASSIFICATION:
Type I
Type II
Type III
Type IV
Type V
Type VI
Type VIII }
Type IX
Luting cement
Restorative cement
Liner
Fissure sealant
Orthodontic cement
Core build up cement
Posterior packable GIC for
atraumatic restorations

28. AMALGAM CARVING
 OCCLUSAL – discoid cleoid instrument
 Facial / lingual – hollenbeck carver
 Proximal- amalgam knife