Transcript 03 Filling materials

Ternopil State Medical
University named by I. Horbachevskyj
Department of
Therapeutic Dentistry
Topic: Filling materials for permanent and temporary
fillings and linings. General requirements. Classification.
Modern filling materials (cements, amalgam, composite
materials). Composition, properties. Indications for use.
Lecturer : Levkiv Mariana
.
1. Classification of filling materials
Depending to which group the tooth belongs,
filling materials are distinguished:
 For front group of teeth
 For molars and premolars
According to the material from which restorative
materials are produced, they are divided into:
Metals : amalgam, alloys, pure metals (gold);
Non metals: cements, plastic,
composite materials.
According to the purpose
Filling materials are divided for:
Permanent
Temporary
Light-curing composite filling material
Therapeutic linings
Calcium
hydroxide
cements
Zinc
oxide/eugenol
cements
Objectives of pulp protection are as
follows: .
■ Therapeutic:
Stimulate odontoblasts to lay down
reparative dentine.
Encourage remineralisation of dentine.
Act against any remaining bacteria.
■ Protect from chemicals. These
may come from the oral cavity,
bacteria or from the restorative
material.
■ Protect from temperature. Metal
restorative materials, such as amalgam
and gold, will transmit changes in
temperature from the oral cavity and, in
the absence of a suitable layer of
dentine in deep cavities, additional
protection must be provided.
■ Seal the dentinal tubules. This will
prevent fluids containing bacteria,
molecules and ions entering the dentinal
tubules, and as a result prevent pain and
possible further caries.
Materials for therapeutic
linings
Methods of pulp protection
a – ‘indirect pulp capping’ b - ‘direct pulp capping’
Classification of cements
Zinc-phosphate
cements
Glass-ionomer cements
Zinc-eugenol cements
Zinc-sulfate cements
Poly-carboxylate
cements
Zinc-phosphate cement
Mixing rules of phospate
cement
Silicate cements
Mixing rules for silicate cement
Silico-phosphate cement
Poly-carboxylate cement
Glass ionomers
They are used as
lining and luting
They also have a low
materials and to
tensile strength
restore abrasion and
which makes them
erosion lesions,
brittle and
cervical lesions and
unsuitable for use in deciduous (primary)
load-bearing areas in teeth and as interim
permanent teeth.
restorations.
It must be
appreciated,
however, that they
are less translucent
than resin
composite
restoratives and
therefore their
appearance is less
acceptable.
Glass ionomers
Ready to use formulations of glassionomer cement
Dental amalgam
Useage of silver amalgam:
а – amalgam is taken out from the capsule;
б, в, г – filling of I, II and V classes respectively
Amalgam without gamma-2 phase Sybraloy (Kerr)
Amalgamtreggers
Instruments for placing amalgam into
carious cavity
Finishing of amalgam filling
Composite materials
Macrofilled
0,04 – 0,1 (8 – 12 мcм)
Microfilled
0,04 – 0,1 –
1 – 5 (1 -5 мcм )
Hybride
( has macro- and
micro- particles)
Nanohybride
(has nano-particles –
0,0004 мcм)
Chemical cured composite
Light-curing units
Light-curing composite
material
Conditioning of dentine
Dentine conditioning and adhesion. (a) Freshly cut dentine
surface. (b) Conditioned dentine. (c) With bonding agent
applied.