الفهرس 
Implant Impression
STATEMENT OF THE PROBLEMOnly 14 pages are availabe for public view
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Abstract
The lack of passive fit between prosthesis and osseo-integrated
dental implant is likely to increase the incidence of mechanical and
biological complications23, 129. Reproducing the intraoral
relationship of implants through impression procedures is the first
step in achieving an accurate, passively fitting prosthesis25. A new
implant impression tray with patent foil technology was
introduced as a mean of acquiring precise pick-up impressions
with ease19.
The present in vitro study was carried out to compare the
accuracy of casts produced by the newly introduced self-perforating
tray against literature’s golden standard; the open custom tray with the
use of different splinting techniques when taking impressions of
multiple implants with different angulations.
Forty impressions were taken of a master cast that contained
two implant analogues with different angulations (0-15º) using two
types of tray (custom) (n=20) and (self-perforating) (n=20) with
different splinting techniques (Splinted) (n=20) and (Non-splinted)
(n=20) using one step-double phase impression technique utilizing
(putty soft& regular) consistency additional silicone.
The acquired impressions were poured using type IV dental
stone and a base of type II plaster made with a base forming device.
The stone casts were positioned on a special platform using a positioning device and their respective inter-abutment distances were
investigated using images acquired by a USB digital microscope with
a 10x magnification and analyzed by Adobe Photoshop® CS6. Data
was collected and statistically analyzed using SPSS® version 23.00.
Results revealed that Impression taken with the custom tray
produced significantly more accurate castings than the self-perforating
tray. Splinting was found to significantly improve the accuracy of
impression taken with the custom tray while it had no significant effect
on self-perforating tray.