الفهرس 
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Abstract
The purpose of the current study was to evaluate and compare:(a) The vertical marginal gap
(b) Internal adaptation
of metal copings constructed by:(1) Conventional waxing technique(2) Milled wax copings cast by lost wax technique without margination.(3) Milled wax copings cast by lost wax technique after margination.(4) Milled metal copings from Cobalt-Chromium blocks.