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Comparison of Accuracy of Two Impression Techniques for Complete Denture with Traditional Technique Using Laboratory 3D Scanner
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A Mohammdpour Tahmtan    , Z Ghanavati * , F Shirgahi Talari |
| 2.Dental Materials Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, I.R.Iran. , zahraghanavatiprostho@gmail.com |
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Abstract: (33 Views) |
Background and Objective: An important step in making complete denture is impression which there are various techniques for it, with differences in accuracy of recording, costs, time, etc. using a technique which is simple while have sufficient accuracy, will help dentists and patients. The aim of this study is comparing the accuracy of these two impression techniques by digital scanner.
Methods: This quasi-experimental research was conducted on impressions taken from upper jaws of 12 patients, chosen randomly. Three different impressions was taken from each patient; zinc oxide eugenol impression as traditional technique and alginate and condensation silicone for comparison. 3D laboratory scanner and an analysis software which shows difference between two surfaces in milimeters (mm), was used for comparison. The average results obtained from the comparisons were expressed for the whole jaw and also for different parts of it.
Findings: In the overall surface of impression, the difference with traditional technique (Mean±SD) was 0.56±0.14 mm for alginate and 0.491±0.136 mm for silicone. In the border area, 1.303±0.423 mm for alginate and 1.119±0.318 mm for silicone, was obtained. the side area of alginate and posterior palatal seal of both methods had mean differences (around 0.5 mm) and the side area of silicone, the alveolar ridge of both methods and the central palatal groove of both methods showed less differences (around 0.2 mm) (p≤0.001).
Conclusion: in This study, the alginate technique and condensation silicone technique were not as accurate as traditional one.
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| Keywords: Dental Impression Technique, Complete Denture, Software Analysis, Three-Dimensional Scanning. |
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Type of Study: Dicscriptive |
Subject:
Dentistry (prosthetics)
Received: 2024/04/3 | Accepted: 2024/10/12
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