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CHAPTER 6
ENDODONTICS DENTAL SCREWS →^ threaded surface in outer to
Endodontics is the study 4 treatment of^ the^ dental^ pulp. increase' contact between the
bone and the implant
If the dental pulp becomes des eased oe inyveed ,
gutta-percha ,a^ thermoplastic material^ ,is^ heated
and compressed into^ the^ root^ canal^ to^ seal^ it^.
Sealing the^ canal^ prevents^ it^ to^ be^ reinfected^.
MATT
-5--
1- →^ thread^ pitch =^ distance^ between
adjacent threads^.
The higher it^ is
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dental (^) prostheses. buttress
IMPLANTOLOGY
It is the (^) study of (^) permanent implantation of artificial teeth (^).
DENTAL IMPLANT : artificial Ti (^) fixthree (^) placed SINUS LIFT GRAFT (^) G RIDGE^ EXPANSION^ PROCEDURE
surgically into^ the^ jaw bone^ and^ When^ the^ sinus^ wall^ is^ too^ thin^ it Is^ impossible to^ place
at the interface bone 1 implant dental implants in it → sinus grafts are necessary
there is osteo (^) integration living bone and^ Ti^ screw (^) grow together →The (^) bony (^) ridge of the (^) jaw is (^) augmented (^) using an
to foam a permanent biological autologous oe artificial block bone graft.
adhesion ). The bone graft material can be placed and matured
now Residual^ bone^ preservation foe month before placing the implant.
Good aesthetic^ Less (^) impact ant bone (^) defects can be treated
No adjacent teeth preparation using granular bone
→ Expensive
complex
- (^) subperiostal dental^ implants
→ they lie on top of the jaw bone
under gum tissue^ ,so^ they don't
penetrate the jaw bone .
→ Cobalt alloys
→ Used foe toothless lower jaw bone
which doesn't^ offer bone height SURFACE FINISHING t textured implants surfaces show
to (^) use an (^) choeing devices more (^) surface area foe
- (^) endosseous dental (^) implants integrating with^ bone^ via
→ surgically inserted into the osteointeg ration^.
jaw bone^ • mechanical treatments = removal of surface material
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→ surgically inserted into the coating process to^ create :/
jawbone (^) penetrating also^ the^ polycrystalline^ coatings^ on
chin and seaweed with screws . metal^ surfaces^.
→ The plate is pressed against the The coating contains ca and P ,
chin bone and the protruding is 800 nm thick and nano porous
pants are used to attach an with high functionality thanks
over denture^ prosthesis. to^ the^ presence of the^ OH^ groups
that bond with ca G P.
Implant failure^ is^ due^ to^ hack^ of (^) primary stability (^) , -
Occlusal trauma , overloading , ongoing marginal
bone loss (^).
Compressive (^) loading is^ not^ problematic (^) , bending and
tensile loading aan instead compromise the integrity
of the^ implant.
DENTAL CROWNS LIGATURE TIES no ties are used to fix the wire to the
bracket (^).
GOLD CROWNS - stainless steel ties
- Kobayashi hooks :pre foamed hooks foe
Gold the^ attachment^ of
→ Duca ble the^ elastics strong - elastomer'c^ ties^ :^ small^ elastic^ rings Gentle on the (^) opposing teeth used^ as^ a tie made of
Works well with glass ionomoe cements PU^ with^ different
Low reactive (^) in the mouth measures^.
→ Conduct hot G cold They^ have^ high
Aesthetics resilience^ in^ older^ to
All the apply^ continuous^ forces^.
gold crowns^ one^ alloys^ because^ puce^ gold
would be too soft to be usable .
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Hore tooth (^) structure must be removed •^ Radio^ paa.ly
PORCELAIN FUSED TO GOLD CROWNS - Glass^ -^ ionomer cement :
Porcelain (^) + (^) gold : used in the (^) prevention of dental caries
-0mm stronger and educable because^ it^ has^ good adhesive bond
Aesthetics properties to^ tooth^ structure allowing
Gold acts a protective barrier for the^ teeth^ the^ toe^ motion^ of^ a^ tight seal^.
Glass ionomoe cement can be used Glass^ - ionomoe^ cement^ is^ based^ on^ the
-0 Opacity due to the gold base reaction^ of^ silicate^ glass - powder and
a ionomer.polyaou.lk acid .
Dark metal edges at germline The reaction
produces a^ powdered
cement of glass particles surrounded
ZIRCONIA CROWNS by a matrix of fluorine elements.
Zirconia : This kind (^) of cement (^) acts as a sealant
onstrong Educable and^ releases^ fhoeine to^ prevent further
Translucent and adorable^ enamel^ de^ mineralization^.
Glass ionomoe cement cove be used Powder = Ca - Al - F glass
→ Not suitable as veneers liquid =polyacid
Reactive 1. Dissolution of the glass particles
2. Gelatin of the polymeric matrix
PORCELAIN FUSED TO ZIRCONIA 3.^ Hardening of^ the^ matrix
Porcelain + zirconia setting time^ =^6 ÷^8 min^.
now (^) stronger bonding :porcelain is (^) less (^) likely to (^) fracture as^ Bactericidal
Cheaper Less^ pulped^ ioietation
Full crown restorations compressive^ strength increases^ up to^ 280hPa
Glass ionomer^ cement^ can^ be^ used^ -^ Zinc^ phosphate cement^ :
non (^) Disadvantages of zirconia (^) Biphasic cement^ ( (^) powder + (^) liquid) with a (^) setting time between (^2) ÷ 8 min (^). DENTAL COMPOSITES CROWNS powder = (^) zinc oxide (^) / (^) magnesium oxide
Dental composite is^ a synthetic resin^ material^ used^ Liquid = 4201 phosphoric acid IA1 phosphate
Exothermic reaction
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BRACKETS none^ metallic^ :^ madelow content^ of^ stainless of carbon^ steel.^ with or chemical agents.
now corrosion on Good bond strength
Discolouring of^ the^ tooth^ enamel^ High^ compressive^ strength
nom (^) polymeric :^ made^ of (^) glass fibers reinforced wa^ water^ sensitive
poeiaanbonale Irritating
nor Aesthetics
nor ceramic : made of a Hominid and zirconia IMPRESSION MATERIALS nor Polyvinyl silos are
now
improved
fracture (^) though ness (^) hydrophobic material
Inherit to which cosmetic grade
Aesthetics (^) surfactants one added
- invisible^ brackets^ :^ in (^) oader to (^) improve (^) wetting
- tongue brackets^ :^ usedthe treatment^ at^ the^ end to^ of of the material.
stabilize the^ teeth^ -0nA Igi hate
position. Elastic
- in visa (^) high PU sheets (^) that can move ,irreversible^ ,
one tooth^ at^ time^. hydeooollo.io^ material
(
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now made of :
- Ni - Ti
- (^) Stainless steel
- (^) ELGILOY ( co - Cr (^) - Ni (^) ) : the (^) strongest } the (^) stiffest -r round wire :^ used at^ the^ beginning -0 (^) square 1 rectangular wire : used at the end to
position the^ crown
and roots.
