الفهرس 
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Abstract
Twelve completely edentulous male patients, their ages ranged
between 50-65 years old, were selected from the outpatient clinic of
prosthodontics department, Faculty of Dentistry, Suez canal University.
Every patient received two stages root form titanium implant in the
canine area of the mandible.
Patients received complete maxillary denture and implant
retained mandibular overdenture
All Patients were classified into two equal groups according to
the length of locator attachment to be used.
group 1: received implant locator of 1mm length on the implant.
group 2: received implant locator of 3mm length on the implant.
The patients were clinically and radiographically evaluated at
(zero, 6, 12 ,18) months from denture loading) for evaluating:
bone density) around implants.
The results were statistically analyzed between both groups.
from these results the following could be concluded.
Within the limitations of this study, the following conclusions are
drawn:
1- increase locator height decrease the lever arm with subsequent decreasing
in the amount of the applied force .Summary& Conclusion
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2-This intern has its great role in reduction of the amount of alveolar bone
loss, more formable osteogenic reaction to the applied load in term of bone
density. And finally this denture movement with its effect on probing depth.
- Certain recommendations about the attachment length in terms of their
effects on peri-implant bone cannot be drawn by two-lenghts only for