RCD Application Lecture 4) Boxing Final
Impressions + Master Casts
Purpose of boxing impressions - correct answer ✔Fabricate a cast that:
- Preserves peripheral roll
- Provides protective rim (*land*) around cast
- Produce a dense cast of mixed stone of proper dimension to permit flasking
- Quality, durable cast
Width of rim (land) - correct answer ✔6mm
Thickness of stone cast - correct answer ✔9mm
Depth of peripheral roll - correct answer ✔2mm
Land area - correct answer ✔The portion of a dental cast that extends
beyond the impression's replica surface laterally
Sticky wax - correct answer ✔Apply a layer around the impressions 3 mm
below periphery
Beading wax - correct answer ✔Apply and seal rods of beading wax (rope
wax) to the sticky wax to *form the land*
Red boxing wax - correct answer ✔Wrap a sheet of boxing wax around the
rope wax to form a container
- Ensure *all joints are sealed* to prevent stone from leaking through
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