Implant retained overdenture is a popular treatment for edentulous patients whether splinted or
solitary attachments were used. The aim of the study was to examine the difference between bar
and telescopic overdenture attachment fabricated from zirconia. Ten male patients were selected
to receive implant overdenture retained by two implants at para-sympheseal zone. These patients
were categorized into two groups based on the type of attachment used. Group (A) was the barconnected
group while group (B) was the telescopic attachment group. Both bone height and bone
density were monitored, using cone beam computerized tomography, throughout the follow up
periods (at loading time, three, six and twelve months). The results showed the mean values of
peri-implant bone height loss of group A were less than group B with statistically significant values
(P< 0.05). The mean values of the bone density showed higher bone density values in group A than
group B with statistically significant value at (P < 0.05). It could be concluded that the zirconia
bar-attachment overdenture showed better treatment outcomes than zirconia telescopic attachment.
Accordingly, the bar-clip attachment system showed some preference in preserving peri-implant
bone surround the implants.