Dental soldering

Dental soldering

1. DRA. YAZLEY ABIGAIL RAMOS AVALOS
DR. ALFREDO NEVÁREZ RASCÓN

DENTAL
SOLDERING
INSTITUTO DE CIENCIAS
BIOMÉDICAS
UNIVERSIDAD AUTÓNOMA DE CIUDAD
JUÁREZ

2. Terms
soldering: is used in dentistry for most of the
metal union processes involving the flow of filler
metal between two or more metal components.
Technically the correct term is brazing.
http://www.oriondentalwelders.com/index.php
Fig. 1

3. Terms
•Welding Flux: material used to prevent the growth of
oxides and other undesirable substances which can
reduce the quality or strength of the welded metal
structure, or to dissolve and facilitate their removal.
•Liquefaction: equilibrium phase, the temperatures
at which the a metals alloy system begins to
solidify by cooling or become completely liquid when
cooled.
Imagen http://www.kuss-dental.com/es/imgs/product/joker.jpg

4. Terms
Brazing: process for join solid metal parts by heating
at a appropriate temperature, allowing the filler
metal reaches its liquid us temperature above 450
° C to melt and flows by capillary attraction between
the parts without affecting the dimensions of the
structure attached.
http://www.hilderbrand.ch/products.html
Fig. 2

5. Terms
Fusion welding: union of two or more pieces
of metal applying heat, pressure, or both with filler
metal or without it. The thickness of metal if it is
usedshould be higher
than capillary dimensions found in brazing.
Imagen http://www.kuss-dental.com/es/imgs/product/joker.jpg

6. Terms
Welding Union: processes that bind metals by
heating them at an adequate temperature and when
applying a filler metal that liquefy without
exceeding 450 ° C that blends and flows by capillary
attraction between the parts without affecting the
dimensions of the bonded structure.
solidification: temperatures where the metals of
alloy system is solidified by cooling or start to
melt by heating them.

7. Terms
Emptied Union: process of joining
two components of a fixed partial denture
through casting a molten metal in a region covered
with interconnected between the components.
Imagen http://www.kuss-dental.com/es/imgs/product/joker.jpg

8. types of welding
autogenic → join two surfaces through heat without
needing to add welding. Occurs a fusion of both
sides and then by pressure meet.
common → is used in dentistry. An example are
those that are based on gold, because it does not
have corrosion or pigmentation.
Imagen http://www.kuss-dental.com/es/imgs/product/joker.jpg

9. CAST JOINING
Another type of metal joining procedure in dentistry.
It is the process of combining two components of a
fixed partial denture bye means of casting molten
metal into interlocking region between invested
components.
Fig. 3
Toptrowns.en.alibaba.com

10. DIFFERENCES
Soldering/brazing: the difference is between the
liquidus temperature of the filler metal.
Soldering & brazing/welding: possible absence of the
filler metal & the partial fusion of the parts joined by
welding.
Imagen http://www.kuss-dental.com/es/imgs/product/joker.jpg

11. Composition of Welding

Gold solders → Copper, Silver, Tin and Zinc.
High Fusion Welds → Nickel, Chromium
and Beryllium.
Low Fusion Welds→ Silver, Tin and Zinc.
http://www.bego.com
Fig. 4

12. Desirable properties for a welding
Easy flow of parts to be welded.
Good adhesion physics.
Melt temperature 100 ° lower than the parts to be
joined.
It should not form pores or cavities.
Resistance equal to or greater than the parts being
joined.
Color to match what is being welded.
Resistant to corrosion, and pigmentation, ie which is
proportional to the fineness(amount of gold)
Imagen http://www.kuss-dental.com/es/imgs/product/joker.jpg

13. Requirements of the joint surfaces
Clean and free of grease and residues of research
ratings.
Surface of color matte (not glossy).
Cover with fluxes.
Imagen http://www.kuss-dental.com/es/imgs/product/joker.jpg

14. Fluxes
Characteristics:
ceramic material.
Capacity of flow over areas to be welded.
 Melts at a lower temperature than the alloy to be
welded.
Remove oxides from the surface to be welded.
Imagen http://www.kuss-dental.com/es/imgs/product/joker.jpg

15. Fluxes
Divided in three types:
Surface Protection : covers the surface of metal and
prevents the enter of oxygen for not letting the form
of oxide.
Reducing Agent: This type of flux reduce
any oxide present and shows a clean metal.
Solvent: this type of flux dissolves any oxide present
and stir.


Imagen http://www.kuss-dental.com/es/imgs/product/joker.jpg

16. Lazer Weldings
Type autogenous welding. That present a optical
focused that enables you to see more accurately. Is
used in:
Welding implants.
Join porcelain bridges.
Repairs metal insert..

Fig. 5
http://www.dentalzainduz.com
Fig. 7
http://www.dentistaschile.cl
Fig.6
Gordon Smith, University of Manchester.

17. Lazer Welding
Trademarks:

DL-2000 dental laser
AX-AWM1 Argon-arc Spot Welders

http://www.dentalcompare.com
http://www.dentalcompare.com
Fig. 8
Fig. 9

18. Bibliografía
http://www.radiodent.cl/materiales_dentales/solda
duras.pdf
Phillips. La ciencia de los Materiales dentales pgs.
649-660 Unindad 27,
Fig. 10
http://1.bp.blogspot.com