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11. Comparative effectiveness of ultrasonic and hand scaling for the removal of subgingival plaque and calculus. Breininger DR, O'Leary TJ, Blumenshine RV. J Periodontol; 1987 Jan; 58(1):9-18. PubMed ID: 3543285 [Abstract] [Full Text] [Related]
13. A 7-month study of sulcular fluid flow in the assessment of healing after debridement of deep pockets. Hakkarainen K, Asikainen S, Ainamo J. J Periodontol; 1986 Jan; 57(1):14-9. PubMed ID: 3511217 [Abstract] [Full Text] [Related]