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3. Detectability of artificial marginal bone lesions as a function of lesion depth. A comparison between subtraction radiography and conventional radiographic technique. Gröndahl K, Kullendorff B, Strid KG, Gröndahl HG, Henrikson CO. J Clin Periodontol; 1988 Mar; 15(3):156-62. PubMed ID: 3280612 [Abstract] [Full Text] [Related]
4. The detection of in vitro produced periodontal bone lesions by conventional radiography and photographic subtraction radiography using observers and quantitative digital subtraction radiography. Janssen PT, van Palenstein Helderman WH, van Aken J. J Clin Periodontol; 1989 Jul; 16(6):335-41. PubMed ID: 2668346 [Abstract] [Full Text] [Related]