Soldering Welding in Dentistry
The word soldering is used if two pieces of metal are joined by means of a third (filer) metal.
Ideal Requirements of Dental Solder:
- It should melt at a low temperature.
- When melted, it should be wet and flow freely over the parent metal.
- Its color should match that of the metal being joined.
- It should be resistant to tarnish and corrosion.
- It should resist pitting during heating and application.
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Application of Solders in Dentistry :
- For soldering various types of wires in orthodontics.
- In pedodontics, construct various types of space maintainers.
- In fixed prosthodontics for:
- Joining the various components of fixed partial prostheses.
- To develop a contact point in the crown.
- For repair of perforation in crown and bridge.
- In removable partial prosthodontics for soldering of clasps.
Types of Solders in Dentistry:
They may be divided into two major groups:
- Soft solders
- Hard solders.
- Soft Solders: Soft solders have a low melting range of about 260°C. They lack corrosion resistance and so are not suitable for dental use.
- Hard Solders: These have a higher melting temperature and greater strength and hardness.
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- They are melted with the help of gas blow torches or occasionally in an electric furnace. Hard solders are more commonly used in dentistry.
- Two types of hard solders used in dentistry are gold solders and silver solders.
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