Authors :
Dr. Udfer Hameed; Dr. Mohd Ali; Dr. Sandeep Kour Bali; Dr. Shabir Ahmed Shah; Dr. Qazi Shazana Nazir
Volume/Issue :
Volume 8 - 2023, Issue 1 - January
Google Scholar :
https://bit.ly/3IIfn9N
Scribd :
https://bit.ly/3GWNsDZ
DOI :
https://doi.org/10.5281/zenodo.7558025
Abstract :
: One of the most important steps in achieving passive
fit of a prosthesis is making precise impressions. The aim
of the present study was to evaluate the accuracy of open
tray implant impression made with two different
impression trays and impression materials.
Methodology: The study was carried on a simulated
acrylic resin model with two implants placed at premolar
and molar region. Open tray implant impressions were
made using two different impression trays and materials
as follows: Group 1: Polyether custom tray impression,
Group 2: Polyether stock tray impression, Group 3:
Polyvinylsiloxane custom tray impression and Group 4:
Polyvinylsiloxane stock tray impression. Total of Forty
impressions were made, making ten for each, and all casts
were made with type IV die stone. The accuracy was
determined by measuring the inter-implant distance from
four impression technique study casts using a profile
projector. The stone casts' dimensions were compared to
the dimensions of the reference model, which served as a
control. To evaluate group means, oneway ANOVA was
used to analyse the significant difference between the two
implant analogues of each group with the reference
model, followed by Tukey's post hoc test for multiple
comparison procedures.
Results: The results showed the mean deviation from
reference model for inter-implant distances for group
1,2,3 & 4 casts were .005 mm, .018 mm, .011 mm, and
.026mm, respectively. The four groups that were tested in
our study revealed notable variations between them with
p-value of 0.005.
Conclusion: The custom tray proved to be more accurate
than stock tray impression. Whereas casts produced by
polyether impression material were comparable with
polyvinyl siloxane impression material.
Keywords :
Implant, Impressions, Polyether, Polvinylsiloxane, Trays
: One of the most important steps in achieving passive
fit of a prosthesis is making precise impressions. The aim
of the present study was to evaluate the accuracy of open
tray implant impression made with two different
impression trays and impression materials.
Methodology: The study was carried on a simulated
acrylic resin model with two implants placed at premolar
and molar region. Open tray implant impressions were
made using two different impression trays and materials
as follows: Group 1: Polyether custom tray impression,
Group 2: Polyether stock tray impression, Group 3:
Polyvinylsiloxane custom tray impression and Group 4:
Polyvinylsiloxane stock tray impression. Total of Forty
impressions were made, making ten for each, and all casts
were made with type IV die stone. The accuracy was
determined by measuring the inter-implant distance from
four impression technique study casts using a profile
projector. The stone casts' dimensions were compared to
the dimensions of the reference model, which served as a
control. To evaluate group means, oneway ANOVA was
used to analyse the significant difference between the two
implant analogues of each group with the reference
model, followed by Tukey's post hoc test for multiple
comparison procedures.
Results: The results showed the mean deviation from
reference model for inter-implant distances for group
1,2,3 & 4 casts were .005 mm, .018 mm, .011 mm, and
.026mm, respectively. The four groups that were tested in
our study revealed notable variations between them with
p-value of 0.005.
Conclusion: The custom tray proved to be more accurate
than stock tray impression. Whereas casts produced by
polyether impression material were comparable with
polyvinyl siloxane impression material.
Keywords :
Implant, Impressions, Polyether, Polvinylsiloxane, Trays
