Folia de Aur Si Utilizarea Ei in Medicina Dentara

8/19/2019 Folia de Aur Si Utilizarea Ei in Medicina Dentara

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Folia de aur si utilizarea ei in medicina dentara

Folosirea aurului in medicina si in stomatologie dateaza de mii de ani.

In stomatologie, prima dovada a folosirii aurului dateaza din secolul 7 i.e.n., etrusciifolosind rele de aur pentru a xa dintii falsi. Aurul prezinta mai multe avantaje careil recomanda ca ingredient pentru protezele dentare: este foarte maleabil, nurugineste si nu provoaca reactii adverse din partea organismului. Aurul a jucat acestrol in stomatologie pana in 17!, cand au inceput sa e utilizati dintii de portelan.

Forma de prezentare

"#ere are t$o basic t%pes of gold foil available toda%: gold foil available in s#eetssupplied in boo&s 'Figure 1( )ensen Industries*, $#ic# t#en can be rolled in varioussizes, and +- old 'Figure /( 0lo%d aum*, $#ic# is gold foil $rapped around amixture of po$dered gold and molten $ax

A2A3"A)+ 24 5+-A2A3"A)+

6anualitatea: "#e primar% reason t#at gold foil is not in more general use in

restorative dentistr% is t#at, unfortunatel%, t#e tec#niue is not taug#t in man%

dental sc#ools. In addition, t#ere are ver% fe$ postgraduate opportunities for

learning #o$ to use it

"e#mica:

The time that it takes to place a buccal pit or casting repair when using E-Z Gold can be equal to

that of a direct composite or amalgam, including anesthesia, rubber dam, cavity preparation,

placement, and finishing.


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+stetica

nother reason dentists say they choose not to use gold foil is aesthetics. !n today"s society this

is understandable and appropriate in many cases, but it should not obviate the use of foil

completely. There are many indications where a small gold foil restoration can be placed as the

treatment of choice. These indications include buccal pits #particularly mandibular molars$, smalllesions in other nonaesthetic areas #small occlusal pits, lingual grooves of ma%illary molars,

lingual pits of ma%illary incisors$, and any repair to an e%isting cast gold restoration. &illions of

patients have chosen cast gold restorations in their mouths and don"t mind having them repaired

if possible. 'ather than replace a serviceable cast gold inlay, onlay, crown, or bridge, gold foil

can be used to repair small defects and e%tend the life of that restoration.

vanta(e)cu liniute din foile ei

"e#nica de realizare

Anesthesia

*epending on the individual patient"s needs, dental anesthesia can be applied using the technique

of the operator"s choice.

Rubber Dam Application

!n order to place a gold foil restoration successfully, it is imperative to utili+e the rubber dam.

sing proper hole placement, clamp selection and placement, retraction when necessary, and

inversion of the dam, the operative site should be isolated in order to give the operator idealaccess, dryness, and visibility to the operative site.

Removal of Existing Restoration

sing a , , /0, or /12 fissure bur, the clinician can carefully remove an old restoration

without enlarging the cavosurface margin. The operative goal is to keep the cavity preparation as

small as possible while giving the operator room to place and condense the gold properly.

Cavity Preparation


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"#e ideal dept# of t#e preparation s#ould be / to 8 mm and into dentin. "#e s#ape

of t#e preparation could be circular, pears#aped, or triangular depending on

operator c#oice. If after removal of t#e existing restoration t#e dept# of t#e cavit% is

deeper t#an 8 to 9 mm, a base s#ould be placed to protect t#e pulp, limit t#e

amount of gold foil utilized, and allo$ t#e ideal dept# to be ac#ieved.

ol%carbox%late or zinc p#osp#ate cement is a material t#at #as been used

successfull% to base cavities of t#is size( t#e material can be placed easil% if mixed a

little on t#e t#ic& side and cemented using a t#inner second mix. "#is allo$s t#e

cement to ;o$ into all parts of t#e cavit%, leaving no voids after condensing $it# an

amalgam condenser. "#e ideal dept# is t#en made using a ;atended bur( t#e $alls

are smoot#ed and retention is ac#ieved using a 89 inverted cone bur at t#e base of

t#e preparation 'Figure 8*. "#e nal step of t#e preparation is to use a 7

nis#ing bur to smoot# t#e outline and remove an% unsupported enamel rods

'Figure 9*. "#is step also places a ver% small bevel and #elps create a s#arp

cavosurface margin. "#is allo$s t#e operator to visualize t#e margin as t#e excess

gold foil is removed and gives t#e preparation a smoot# and ;o$ing outline form


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Gold Placement and Condensation


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using a placement instrument '4uter 6anufacturing*, a pellet of +- old is placed

in t#e top of an alco#ol ;ame. "#e pellet s#ould be #eld in t#e ;ame until t#e $ax is

burned o= '/ to 8 seconds*. "#e pellet is t#en carefull% placed in t#e cavit% and

gentl% pus#ed in place using a condenser or parallelogram '4uter 6anufacturing*. At

t#is point t#e gold must be made as dense as possible using an% of a fe$

condensation met#ods. "#e simplest met#od is using just #and condensation $it#amalgam condensers. >sing a fair amount of pressure, t#e gold s#ould be pus#ed

as far into t#e cavit% as possible, leaving no air space. ?t#er classic met#ods of

condensation t#at can be used are various condensers and #and malleting, an

electromallet, or a pneumatic condenser. @#ic#ever met#od is used, t#e +- old

s#ould be condensed against t#e $alls in a circular pat# around t#e cavit%, ma&ing

sure no contact is made bet$een t#e condenser and cavosurface margin 'Figure *.

Additional pellets of +- old are t#en placed and condensed into t#e cavit% until it

is almost lled. "#e entire cavit% can be lled using onl% +- old, or t#e nal la%ers

could be placed using gold foil. old foil can be rolled in small pellets t#at $ill allo$

t#e operator more precision at t#e cavosurface t#an +- old, and if properl%

condensed and nis#ed, gold foil ma% give t#e restoration a more #ig#l% polis#ed

surface. Follo$ing completion of t#e gold placement, a foot condenser can be

utilized to condense t#e foil surface rml% as $ell as identif% an% soft spots. A

beavertail burnis#er is t#en used to burnis# and #arden t#e surface of t#e soft gold.

"#e burnis#er s#ould al$a%s be used in a direction from gold to t#e toot# 'Figure B*

Finishing

Figure 7. 3ine sandpaper

disk being used to remove

e%cess.

Figure 8. *iscoid hand

instrument removing e%cess

gold and placing anatomy.

3inishing is defined as leveling the gold with the tooth surface in 4 planes


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Polishing

lishing

Figure 9. 'ubber cup with

aluminum o%ide powder

polishing foil.

Figure 10. 5uper greenie in

high speed used with very

light pressure and air spray.

Figure 11. 6ompleted class !

gold foil.

Figure 1. 7re-op of second

case-8 occlusal restorations on

bicuspid.


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Figure 1!. 6ondenser being

used with holder to condense

foil against walls.

Figure 1". 9cclusal view of

condenser in use.

Figure 1#. :o. ; round bur

slowly peeling away e%cess

foil.

Figure 1$. 3ine finishing

diamond smoothing gold foil.

Figure 17.


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modified to fit the restoration

surface$.

to polish foil.

Figure 19. 6ompleted

restorations.

The final step is making the surface very smooth and removing any e%cess that may be causing

reflection from the margins. 3lour of pumice and aluminum o%ide powders can be used with

ribbed rubber cups #3igure 0$, but this step can also be accomplished in small restorations using

brownies, greenies, and super greenies #3igure /2$. sing light pressure with higher speeds,

always with an air stream, a highly polished surface can be achieved quickly #3igure //$. #:ote)

second case is demonstrated in 3igures /8 to /0.$

!ndormatii suplimentare)

E%ista) cademy of Gold 3oil

#goldfoil.org$
http://www.goldfoil.org/http://www.goldfoil.org/

Folia de Aur Si Utilizarea Ei in Medicina Dentara

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