Question 44 · LDEK · Dental laboratory technology
Indicate the true statements concerning galvanoforming technology used in prosthodontics:
1) it utilises an electrolyse phenomenon, as a result of which homogeneous atoms of pure gold accumulate on one of the electrodes (in prosthodontics it is a cast, i.e. the anode);
2) it allows of the precipitation of homogeneous gold with the purity of 99.990/0- which does not eliminate a possibility of corrosion and allergy;
3) homogeneous gold obtained by means of galvanoforming meets all the highest biocompatibility demands on base materials in prosthodontics;
4) it makes possible the thickness of the substructure of ca. 0.2 mm;
5) it does not permit the fabrication of the prosthodontic structure on telescopes and implants.
The correct answer is:
2) it allows of the precipitation of homogeneous gold with the purity of 99.990/0- which does not eliminate a possibility of corrosion and allergy;
3) homogeneous gold obtained by means of galvanoforming meets all the highest biocompatibility demands on base materials in prosthodontics;
4) it makes possible the thickness of the substructure of ca. 0.2 mm;
5) it does not permit the fabrication of the prosthodontic structure on telescopes and implants.
The correct answer is:
- A. all the above.
- B. 1,3,4.
- C. 3,4.
- D. 2,3,4.
- E. 3,4,5.
Hint
Recall at which electrode metal cations are deposited during electrolysis and what the main clinical advantage of 99.99% pure gold is.
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