**3.3 Comparison of marginal bone changes within each group at three different views**

In the coronal view, within the ultrasound group, there was statistically significant increase in the buccal and palatal bones' thickness (height and width) from day 0 to 3 months, day 0 and 6 months, and from 3 to 6 months as p value was less than 0.05, but it was more pronounced at the buccal bone plate, while in the control group, there was no statistically significant increase in bone thickness, and there was marginal bone loss at all aspects of 9\*dental implant.

In the sagittal view, within the ultrasound group, there was statistically significant increase in the mesial and distal bones' thickness (height and width) from day 0 to month 3, day 0 and month 6, and from month 3 to month 6 as p value was less than 0.05, while in the control group, there was no statistically significant increase in bone thickness, and there was marginal bone loss at all aspects of dental implant.

In the axial view, within the ultrasound group, there was statistically significant increase in the buccal, palatal, mesial, and distal bones' thickness (height and width) from day 0 to 3 months, day 0 and 6 months, and from 3 months to month 6 as p value was less than 0.05, while in the control group, there was no statistically significant increase in bone thickness.

### **3.4 Comparison of marginal bone changes between two groups at three different views**

In the coronal view, there was statistically significant increase in buccal and palatal bone width between two groups (ultrasound and control) at 3 and 6 months as p value was less than 0.05. Thus, this increase in bone plate width is contributed to ultrasound therapy. There was no statistically significant increase in buccal and palatal bone height at 3 months between ultrasound and control groups, but there was statistically significant increase in buccal and palatal bone height at 6 months. Thus, this increase in bone plate height is contributed by ultrasound therapy.

In the sagittal view, there was statistically significant increase in mesial and distal bone plates' width between two groups (ultrasound and control) at 3 and 6 months as p value was less than 0.05. Thus, this increase in bone plate thickness is contributed by ultrasound therapy. There was no statistically significant increase in mesial and distal bone height at 3 months between ultrasound and control groups, but there was statistically significant increase in mesial and distal bone height at 6 months. Thus, this increase in bone plate height is contributed by ultrasound therapy.

In the axial view, there was statistically significant increase in buccal, palatal, mesial, and distal bone plates' width between two groups (ultrasound and control) at 3 and 6 months as p value was less than 0.05. Thus, this increase in bone plate thickness is contributed by ultrasound therapy.
