الفهرس 
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Abstract
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CAD software (3shape and Exocad software) were evaluated in digital
construction of complete denture using complete denture module. Seven
completely edentulous patients were selected free from any systemic or local
conditions that might affect the results of this study.
Two digital dentures were designed for each patient using two different
software. Complete dentures designed by 3Shape software (group A), and
complete dentures designed by Exocad software (group B). Patient’s
secondary impressions and jaw relation were conventionally taken then
scanned using 3shape D850 scanner to be imported as STL file to the
designing software.
3shape software designing steps included model analysis, digital
surveying, digital teeth setting, creation of denture bases and finalizing the
denture. While Exocad software designing steps included upper model
analysis, lower model analysis, upper and lower models together, teeth setting,
path of insertion and removal determination, upper and lower denture bases
design, adaptation of denture bases to teeth and finalizing the denture.
The designed dentures were exported as STL file and sent to
Duplicator 7 3D printer. The adaptation of the printed denture bases was
compared to the scanned master cast as a reference data by calculating the
deviation occurred between them. This occurred by superimposition of the two
STL files together using Geomagic surface matching software. The retention
of the printed denture base was evaluated using digital force meter device. Summary
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It was found that both software produced superior digital dentures
regarding the adaptation and the retention, However, group A dentures showed
better adaptation results than group B. Furthermore, group A dentures showed
better results in retention than group B dentures