Volume 45, Issue 1 (3-2021)                   Research in Medicine 2021, 45(1): 47-51 | Back to browse issues page

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Mohammadi M, Noorbakhsh M, Azizi E. Comparative effects of conventional and digital impression techniques on the marginal adaptation of zirconia restorations. Research in Medicine 2021; 45 (1) :47-51
URL: http://pejouhesh.sbmu.ac.ir/article-1-2142-en.html
Department of Dental Fixed Prosthetics, School of Dentistry, Islamic Azad University, Tehran, Iran , joperativedent@gmail.com
Abstract:   (1405 Views)
Backgrond and Aims: One of the concerns in impressioning in dentistry is the marginal adaptation of the restoration which affects the accuracy and precision of the impression. Therefore, the aim of the present study was to compare the effects of conventional and digital impression techniques on the marginal adaptation of zirconia restorations in the classical chamfer preparation design.
Materials and Methods: In the present experimental study, 20 stainless steel die-casters were fabricated and divided into two groups. In the first group, intraoral scanners were used to taking impression and in the second group, one-step impressioning was carried out using panacil additive silicones. All specimens were cemented on their dies under a pressure of 5 N and their vertical and horizontal gap values ​​were measured using stereo microscope.
Results: The mean vertical gap before cementation in conventional impression group was 47.15 microns and 31.79 microns in digital method. Mann U Whinee test results showed no significant difference between the two groups (P <0.2). Vertical gap after cementation in the conventional method was 80.35 microns and 67.46 microns in the digital group, indicating no significant difference between the two groups (P <0.6). The amount of marginal adaptation was similar regardless of the type of impressioning (p <0.9). The marginal adaptation values in the horizontal dimension in the conventional technique group were 66.97 microns and 53.91 microns in the case group, which were not statistically significant (P <0/8).
Conclusion: The results showed that each of the digital and conventional approaches was within the clinically acceptable ranges in terms of the impact on the marginal adaptation of the zirconia restorations.
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Type of Study: Original | Subject: dentistry
Received: 2019/12/2 | Accepted: 2020/02/16 | Published: 2021/10/30

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