الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 159 |  |  |
| | | from | 159 | | |
Abstract
Background: Accurate recording of implant locations is required
so that definitive restorations are properly supported and do not place
additional stress on the implants. Angulated implants may result in inaccurate
impressions, and the impression technique may affect the accuracy of the
definitive cast. The aim of this study was to compare the dimensional accuracy
of casts obtained from three impression techniques (indirect-, directunsplinted
and direct splinted with acrylic resin-technique) for three definitive
lower casts with implants at different angulations.
Materials and method: Three Osseolink implants were placed in
three reference models with different angles (0, 15, and 30 degrees). Thirty
medium-consistency polyvinyl siloxane impressions of each model were made
with three techniques (n=10 per group): (1) indirect-, (2) unsplinted directand
(3) acrylic resin splinted direct technique. Impressions were poured with
type IV dental stone. The inter-implant distances were measured for casts
using a coordinate measuring machine and the deviations compared to the
reference models were calculated. Data were analyzed using one way ANOVA
followed by post-hoc tests to detect significance between groups (=0.05).
Results: This study showed that the acrylic resin splinted direct
technique reproduced the three-dimensional position of implants more
accurately than the indirect and unsplinted direct techniques in 30 degree
angulated implant situation.in 15 degree angulated implants both the acrylic
resin splinted direct technique and unsplinted direct techniques were more
accurate than indirect technique. While in parallel implant condition, no
difference was found between all three techniques.