Dentomaxillofacial Radiology · 2014 · 36 citations · 36 references
Materials containing less radio-opacity produce less pronounced artefacts. The cut-off point for artefacts is at 20% radio-opaque filling material in composite material.
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Oral radiology. Principles and interpretation
G.R. Seward · Journal of Dentistry · 1983 · 1.6K citations