Is there any way for a "porcelain-fused-to-metal crown" to avoid a dark line at the gumline?

July 19, 2014
Asked By:Wigo Huang in Asia

I'm a dentistry student. Except for all-ceramic crown, is there any way for PFM crown to avoid dark line at the gumline? (Tooth preparation or framework design of crown). Thank you for your reply.

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