Crowns are the restoration of choice when a filling will no longer suffice. Once a filling occupies 50% or more of the width of a tooth, a crown is indicated. Crowns surround the tooth bracing it together, whereas a large filling acts as a wedge, weakening the tooth. Teeth with large fillings are prone to breaking or splitting.
We can fabricate crowns that are all porcelain with no underlying metal to avoid the unsightly black line you may have seen and to color match the crown to seemlessly blend with your smile.