Research Article
Volume 21 Issue 1 - 2022
The Effect of Sterilization on Dimensional Stability of Addition Silicone Impression Material
Salah A Yousief1*, Saud Dakhilallah A Alharbi2, Ahmed Dakhilallah A Alharbi2, Mazen Hakem A Alharbi2, Mohammed Ibrahim M Algethami2, Nahar Abdullah N Alobaykan2, Tasneem Mohammad Ali Jali2, Mohanad Abdulaziz A Almushigeh2, Abdullah Ali Alrizqi2, Yazeed Abdullah Altowairqi2, Abduljalil Mahmoud Alim2, Hussam Ibrahem Alharthi2, Abdulrahim Mohammed Alghamdi2, Dalal Abdulaziz Alnafisah2 and Adi Hatim Obaidallah ALTurkistani1
1Department of Restorative and Prosthetic Dental Sciences, College of Dentistry, Dar Al Uloom University, Riyadh, Saudi Arabia and Crown and Bridge Department, Faculty of Dental Medicine, Al Azhar University, Assiut Branch, Egypt
2General Dentist, Saudi Arabia
*Corresponding Author: Salah A Yousief, Department of Restorative and Prosthetic Dental Sciences, College of Dentistry, Dar Al Uloom University, Riyadh, Saudi Arabia and Crown and Bridge Department, Faculty of Dental Medicine, Al Azhar University, Assiut Branch, Egypt.
Received: October 31, 2021; Published: December 30, 2021


Objectives: This study was done for assessing dimensional stability and accuracy of an addition silicon impression material with autoclaving.

Methods: 20 impressions for a master model is done with heat resisting plastic trays. The 20 impressions were divided into 2 groups regarding the how they are disinfected: Group 1: (number = 10) Control group, undisinfected impressions (C.G), Group 2: (number = 10) impressions were autoclaved (A.G). Then, pouring was done using extra hard stone (type IV), casts were produced. Impressions dimensional stability and accuracy were assessed indirectly by casts reproduced from impressions taken to the master model by the use of travelling microscope.

Results: Cross arch distance (A): resin master model cross arch distance (A) was (41.36 mm). Cross-arch distance of stone casts Control group (C.G): was 41.553 ± 0.170 mm. Autoclaving group (A.G): distance (A) in stone models was 41.718 ± 0.242 mm. ANOVA proved statistically significant different shrinkage between groups (P-value= 0.006). Dimensional changes in the cross-arch distance of the groups. Cross arch distance changes in stone models of C.G. was 0.191 ± 0.170 mm. dimensional changes in models with A.G. was 0.365 ± 0.242 mm.

Conclusion: Autoclaving of polyvinyl siloxane impression does not affect its accuracy.

Keywords: Sterilization; Silicone; Stability


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Citation: Salah A Yousief., et al. “The Effect of Sterilization on Dimensional Stability of Addition Silicone Impression Material”. EC Dental Science 21.1 (2022): 17-29.

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