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(A) Macroscopic (left) and microscopic (right) features of the polyglycolic acid (PGA) spacer. (B) Computed tomography (CT) or cone beam computed tomography (CBCT) images and Hounsfield unit number of the PGA spacer under dry and wet conditions. (C) Pressure tests of the PGA spacer. Three independent tests were performed using 0.5 to 3.0 kPa pressures.
