الفهرس 
AcknowledgmentOnly 14 pages are availabe for public view
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Abstract
Fourteen patients with upper edentulous arches were
categorized according to the pattern of their treatment
modalities into two groups. The first group placing four
implants in the canine and molar areas with bar
attachments, and the second group placing four implants in
the canine and molar areas with locator attachments. The
dental implant was evaluated radiographically using digora
system to show chenges on marginal bone height and bone
density by the effect of time.