Fig. 4From: Ultrasonography for noninvasive and real-time evaluation of peri-implant soft and hard tissue: a case seriesThe intraoral radiograph 7 years after insertion of the superstructure showed horizontal and vertical bone loss at all implants. At the implant in region 33, the mesial and distal crestal bone loss reached up to the 6th thread, at implant in region 34 to the 4th thread, and at the implant in region 35 to the 5th threadBack to article page