Calcium hydroxide
Temporary root canal filling
Subbase Component of sealers
Calcium hydroxide
■ Short term action 1—2 weeks
Desinfection, haemostasis
Calcium hydroxide
■ Midie term action 2 — 3 months
Apexification Chronic form of apical periodontitis
Calcium hydroxide
■
Long term action months and more
Prevention of resprption
Root canal filling
Ideal root canal filling (Grossman 1988)
Easy mixing
Sufficient working time
Good seal
X- ray contrast
Easy removal
No shrinkage
Long term volume stability
No bacterial growing
No permeability for fluids
Biocompatibility
No staining
Classification of root canal fillings
> Solid
> Semisolid
> Pastes
Guttapercha
Dried juice of the Taban tree (Isonandra percha) (gutta)
1,4 - polyisoprene
Crystallin structure (60%
Britde
Guttapercha
Beta phase
Alpha phase 42 - 49 °C
- plastic
Gamma phase 56 - 62°
Cooling- process
amorfnf)
very slowly (less than 0,5°C) — alpha phase normal cooling— beta phase
Composition of guttapercha materials in endodontic
Guttapercha 19% - 22%
Zinc oxide 59 - 79%
Heavy metal salts 1% - 7%
Wax or resin 1% - 4%
Resilon
(Pentron)
> Thermoplastic synthetic polymer
> Points or material for injection
Composition: Polyester polymers Bioactive glass Radioopaque ßllers (bismuthum oxichlorid a and baryum sulphate)
Silver or titanium cones
> No good seal
> Silver cones - corrosion
Good adhesion to root canal walls as well as solid cones X- ray contrast Bio compatibility
Sealers
Zinc Oxide-Eugenol
Chloropercha
C alciumhydr oxide
Glasionomer Silicone
Importance
Sealers
Filling of the spaces between the solid cones
Seal of the root canal filling
Zinc - Oxid Eugenol
Powder: Zinc oxide
Good adhesivity, antimikrobial effect, cytotoxic resorbable)
Zink Oxid Eugenol sealers
Pulp Canal Sealer (Kerr, USA))
Tubuli- Seal (Kerr, USA)
v
Caryosan (Spofa Dental, CR)
Chloropercha
Powder Canadian balsam Resins Guttapercha Zinc oxide
Liquid:
Chloroform
Resins
Chloropercha
Good adhesivity Shrinkage Toxicity
Calciumhydroxide sealers
Base (powder) Calcium hydroxide Zinc oxide
Other components and vehicula
Kalciumhydroxidové sealery
Catalystr (paste) Zinc s tear at Titanium dioxide Baryum sulphate or
Eugenol,. Eukalypt
others
Kalciumhydroxide sealers
> Increase of the healig potential of periapical tissues
> Antibacterial effect
> Easy manipulation
But!
resorbable if not homogeneus Not suitable for the single cone
Resins
^Rezorcin formaldehyd
> Epoxide
^Polyketone
^ Metacrylate
Rezorcin formaldehydove prys
rice
Toxicity
N2, Endomethason, Riebler's paste, Foredent
Epoxide resin
^Base (powder, paste) Bismuth oxid Titanium dioxide Hexametylentetramine (Silver)
^ Catalyst (liquide, paste) Bisphenoldiglycidylether
Epoxide resin Advantages
^ Long working time ^Hydrophilic (good penetration) ^ Good adhesion to the root canal walls ^Volume stability ^No dissolution ^Antibacterial
^ Difficult removal
^ Staining
^ Initiatiory roxicity
No suitable for the single cone technique
Polyketone
^ Base
Zinc oxide Bismuth phosphate Hexametylentetramine
^ Lequid
Bisphenolglycidylether and other components
Polyketone
(advantages and disadvantages)
Advantages Good adhesion No contraction No dissolution
Disadvantages High stickness Not removable
Products: Diaket, Diaket A (3M ESPE)
Methacrylate resins
EndoReZ fUltradentí - UDMA
For injection — single cone technique Epiphany (Pentron) Bis- GMA, etoxy bif- GMA, hydrophilic bifunctional methacrylates
Calcium hydroxide, baryum sulphate, baryum glass silica.
Scaler in combination with Res Hon
Glasionomer sealers
^Base (powder) Aluminium silicate glass
> Liquid
Polyacrylic acid, polymaleic acid, tartaric acid
Glasionomer sealers
(Advantages and disadvantages)
Advantages:
Curing under wett conditions, chemical bonding to hard dental tissues, no staining
Disadvantages
Short working time, difficult removal,
porous
Products
Ketac Endo (3M ESPE), Endion (VOCO)
Silicon based sealers
Polyvinylsiloxane (ev. in mixture with powdered guttapercha
Biocompatibility Hydro fillic
Further investigation desirable.
Root canal fillings - forms
> Points (Cones)
> Materials for injection ^Plastic materials