الفهرس 
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Abstract
Purpose: The aim of this study was to compare clinically between
single and two implants retaining mandibular complete overdentures as
regards bleeding on probing and the depth of peri-implant sulcus.
Subjects and Methods: Twelve completely edentulous males were
enrolled in the study and were randomly divided into two equal groups.
First group received two implants at the canine areas. Second group
received a single implant at the midline. The degree of peri-implant
inflammation was assessed using the modified Bleeding on Probing Index
and by measuring the depth of the peri-implant sulcus (probing depth).
Assessments were carried out two weeks after overdenture delivery, then
one, two and three months later to evaluate the soft tissue changes around
the implants. Mann Whitney test was used for between-group
comparison, and Friedman test was used for within group comparison.
The significance level was set at P ≤. 0.05.
Results: There was a gradual decrease in bleeding on probing and
probing depth within each group. However, this decrease was not
statistically significant. Similarly, for both parameters, there was no
statistically significant difference between both groups at all follow-up
periods.
Conclusion: One implant retained overdentures showed
comparable results to two implant retained overdentures as regards
bleeding on probing and probing depth.
Keywords: single implant retained overdentures, two implant
retained overdentures, bleeding on.