الفهرس 
Review of LiteratureOnly 14 pages are availabe for public view
 |  | from | 128 |  |  |
| | | from | 128 | | |
Abstract
Dental implants are frequently used to replace missing anterior teeth, teeth loss due to trauma, or teeth removed due to unfavorable restorative conditions.
The marked alterations after tooth extraction appear to be attributable to the loss of periodontal ligament and the consecutive trauma in particular at the buccal bone plate. Thus, it can be assumed that root retention may have an influence on the occurring resorption process.
With the RST, submucosal root retention can virtually eliminate bone resorption. Based on this concept, the retention and stabilization of the coronal and buccal bundle bone and the retention of the periodontal membrane by retaining a coronal tooth fragment (so-called “socket shield”), including adequate blood supply, can be expected.
In present study SS preparation placing implant in contact with shield (group I) and leaving a gap to be grafted by xenograft particles (group II) were compared clinically and radiographically using CBCT.
Six months after implant placement, the abutment was unscrewed and conventional loading was applied using permanent ceramic crown.
CBCT scans were taken immediately post-implant placement and at 6 months follow up period to measure the amount of ridge alteration.
Horizontal radiographic measurements were not statistically significant at 6 months follow up in both groups. Also, the ridge alteration measurements were not statistically significant at 6 months follow up.
Regarding bone density both group (I) and group (II) showed an increase in bone density, group (II) had a higher mean value than group (I) but the difference was not statistically significant.
The total mean PES between the group (I) and group (II) showed no statistically significant differences, demonstrating that an esthetically satisfactory result can be obtained with both techniques.
This study has indicated, that no preferences regarding leaving a gap and grafting or placing implants in contact with socket shield preparations.