:: Volume 30, Issue 1 (1-2018) ::
J Iran Dent Assoc 2018, 30(1): 32-38 Back to browse issues page
Effect of Storage Conditions and Disinfection with 2% Deconex® on Dimensional Stability of Two Self-Cure Acrylic Resins
Shima Safaeian1 , Sareh Habibzadeh * 2, Seyed Jalal Porhashemi3 , Niloofar Entezari Moghaddam4
1- Assistant Professor, Department of Prosthodontics, School of Dentistry, International Campus, Tehran University of Medical Sci-ences, Tehran, Iran
2- Assistant Professor, Department of Prosthodontics, School of Dentistry, International Campus, Tehran University of Medical Sci-ences, Tehran, Iran , s-habibzadeh@tums.ac.ir
3- Professor, Department of Pediatrics Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
4- Dentist, Private Practice, Tehran, Iran
Abstract:   (3302 Views)
Background and Aim:
There is a gap of information on the effect of time, disinfectant, and storage conditions on the dimensional stability of direct post patterns made of self-cure acrylic resins. This study assessed the effect of Deconex® and wet or dry stor-age conditions on the dimensional stability of post patterns made of Duralay and GC acrylic resins.
Materials and Methods:
Sixty specimens were fabricated of GC and Duralay acrylic resins (n=30) by using a stainless steel mold. The specimens in each group were divided into three subgroups (n=10). The specimens of subgroup 1 were immersed in Deconex® for 2 minutes followed by dry storage at 25°C. The specimens of subgroup 2 were stored in water at 25°C. The samples of subgroup 3 were immersed in Deconex® for 2 minutes followed by water storage at 25°C. The dimensions were measured immediately and 2 minutes, 1 hour, and 24 hours after setting. Data were analyzed by repeated measures ANOVA. One-way ANOVA and t-test were used for subgroup analysis at 5% significance level.
Results:
The greatest mean dimensional changes occurred after 24 hours in both groups. In GC group, subgroup 1 experienced minimal changes during 24 hours. Duralay subgroups 1 and 2 experienced minimal changes after 1 and 24 hours; the difference between the two subgroups was not significant. Maximum changes were noted in GC subgroups 2 and 3 and in Duralay subgroup 3 (P<0.05).
Conclusion:
In case of a 24-hour delay, storage conditions would have no effect on the dimensional stability of Duralay patterns, while GC patterns should be stored in a dry condition.
Keywords: Acrylic Resins, Dental Dowel, Post and Core Technique, Disinfection
Full-Text [PDF 338 kb]   (1229 Downloads)    
Type of Study: Original | Subject: Prosthodontics
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