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Dental soldering

Dental soldering



Dental soldering

Dental soldering



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    Dental soldering Dental soldering Presentation Transcript

    • 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. Fig. 1 http://www.oriondentalwelders.com/index.php
    • 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
    • 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. Fig. 2 http://www.hilderbrand.ch/products.html
    • 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
    • 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.
    • 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
    • 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
    • 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
    • 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
    • Composition of Welding Gold solders → Copper, Silver, Tin and Zinc. High Fusion Welds → Nickel, Chromium and Beryllium. Low Fusion Welds→ Silver, Tin and Zinc. Fig. 4 http://www.bego.com
    • 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
    • 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
    • FluxesCharacteristics: 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
    • FluxesDivided 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
    • Lazer Weldings Type autogenous welding. That present a optical focused that enables you to see more accurately. Is used in: Fig. 5 Welding implants. Join porcelain bridges. Repairs metal insert.. http://www.dentalzainduz.com Fig. 7 Fig.6 Gordon Smith, University of Manchester. http://www.dentistaschile.cl
    • Lazer WeldingTrademarks:  DL-2000 dental laser  AX-AWM1 Argon-arc Spot Welders Fig. 9 Fig. 8 http://www.dentalcompare.com http://www.dentalcompare.com
    • 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