الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
In this study a ready made completely edentoulus epoxy resin
model was brought, upon the model a complete acrylic resin denture was
constructed in a conventional way.
The denture was duplicated into identical denture in a duplicating
flask, the two implants were installed into the model in the canine region
on both sides of the dental cast.
Then the study cases were divided into two group
• group I: where the two implants were attached together with a bar.
• group II: where the two implants were connected to a ball /socket
attachment.
Dentures were placed on the test of the universal testing machine,
the compressive load was gradually applied until the fracture done.
The fracture resistance test results revealed that the highest mean
values of the fracture loads were found in the over denture with
ball/socket group but there was no statistical significant difference
between the two group.
In the over denture that retained over the ball/socket attachment the
fracture line has extensively in the anterior region (mid line fracture).
while in the over denture that retained over bar-clip group the
fracture line was bilaterally in the premolar area.