Fig. 3From: Ultrasonography for noninvasive and real-time evaluation of peri-implant soft and hard tissue: a case seriesThe clinical findings 7 years after insertion of the superstructure showed at the implants with primary crowns no soft tissue recessions and the keratinized mucosa was > 1 mm. The implant in region 33 showed a blue-livid discoloration buccally (marked by an asterisk)Back to article page