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Optical micrographs taken at 3- and 6-week time point at healing chamber and bone interface. (A) Control-machined implant group. 3-weeks: (B) Boron-machined implant group. (C) Control acid-etched implant group. (D) Boron acid-etched implant group. 6-week: (E) Control-machined implant group, (F) Boron-machined implant group, (G) Control acid-etched implant group, and (H) Boron acid-etched implant group.
