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Composite stitched image showing remaining ink after various treatments. The whole surface was covered by ink, but the ink was removed from the most apical section of the implant when it was inserted into the Sawbone and then later removed. Thus, the region of the most apical two threads was excluded from subsequent analysis of surface cleaning effects. Uppermost panel: (a) glycine used at 55 psi, (b) sodium bicarbonate used at 55 psi, and (c) calcium carbonate used at 55 psi
