الفهرس 
Introduction .Only 14 pages are availabe for public view
 |  | from | 163 |  |  |
| | | from | 163 | | |
Abstract
The objective of this study was to compare the effect of different drilling techniques (Osseodensification versus conventional drilling) on the supporting structures of posterior maxilla in implant retained partial denture.
Eight patients were selected from the outpatient clinic of Oral and Maxillofacial Prosthodontics Department, Faculty of Dentistry, Ain shams University to participate in this study. Patients were thoroughly examined to reduce human variables and eliminate any factor that might affect the results of this study. This research was reviewed by the Research Ethics Committee, Faculty of Dentistry, Ain Shams University.
Each patient received two implants then the patients were rehabilitated with implant retained maxillary removable partial dentures. Standard clinical and laboratory techniques were followed for partial denture construction for all patients.
Eight patients were included in this split-mouth study where every patient received two implants with two different drilling techniques and were divided into two equal groups as follows:
• group 1:
Implants were inserted on the right side of upper Kennedy Class I selected patients using Densah™ burs with osseodensification technique.
• group 2:
Implants were inserted on the left side of upper Kennedy Class I selected patients using conventional drills.
Surgical placement of the implants was performed under strict aseptic conditions, then delayed loading protocol was followed.
Patients were frequently recalled for post-insertion inspection and regular adjustments. Follow-up visits were scheduled at the time of denture insertion, six, and twelve months for inspection of the partial dentures and radiographic evaluation of the marginal bone height changes.
Marginal bone levels around the implants was measured using intraoral digital sensor (GXS-700).
The results of this study showed a statistically insignificant difference in marginal bone height changes between the two groups in the loading to six months, the six to twelve months’, and the loading to twelve months’ follow-up periods. Six months from prosthetic loading the average mean marginal bone height changes were 0.675 ± 0.089 mm and 0.7625 ± 0.206 mm for group I and group II, respectively. Six to twelve months from loading the average mean marginal bone height changes were 0.475 ± 0.167 mm and 0.65 ± 0.207 mm for group I and group II, respectively. And for the loading to twelve months’ follow-up period, the average mean marginal bone height changes were 1.15 ± 0.239 mm and 1.4125 ± 0.253 mm for group I and group II, respectively.