Question 192 · LDEK · Dental laboratory technology
The lost wax technique can be described as follows:
- A. function of time and temperature. When the wax temperature is higher than that of environment big volumetric changes of wax mould occur.
- B. pattern is made of modelling wax and is invested in gypsum.
- C. pattern is made of casting wax and is invested in investment material.
- D. solid metal can be used only in lost wax technique.
- E. technique is used to extend the standard tray before impression taking.
Hint
The pattern must burn out completely and the mould must withstand molten alloy; consider which wax and which embedding material allow that.
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