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Influence of opacifiers on dimensional stability and detail reproduction of maxillofacial silicone elastomer

التفاصيل البيبلوغرافية
العنوان: Influence of opacifiers on dimensional stability and detail reproduction of maxillofacial silicone elastomer
المؤلفون: Moreno Amália, Pesqueira Aldiéris A, dos Santos Daniela M, C Sinhoreti Mário A, Haddad Marcela F, Goiato Marcelo C
المصدر: BioMedical Engineering OnLine, Vol 9, Iss 1, p 85 (2010)
بيانات النشر: BMC
سنة النشر: 2010
المجموعة: Directory of Open Access Journals: DOAJ Articles
مصطلحات موضوعية: Medical technology, R855-855.5
الوصف: Background We evaluated the influence of chemical disinfection and accelerated aging on the dimensional stability and detail reproduction of a silicone elastomer containing one of two opacifiers. Methods A total of 90 samples were fabricated from Silastic MDX 4-4210 silicone and divided into groups (n = 10) according to opacifier content (barium sulfate or titanium dioxide) and disinfectant solution (neutral soap, Efferdent, or 4% chlorhexidine). The specimens were disinfected 3 times per week during 60 days and then subjected to accelerated aging for 1008 hours. Dimensional stability and detail reproduction tests were performed after specimens' fabrication (baseline), chemical disinfection and periodically during accelerated aging (252, 504, and 1008 hours). The results were analyzed using 3-way repeated-measures ANOVA and the Tukey HSD test (α = 0.05). Results All groups exhibited dimensional changes over time. The opacifier (p = .314), period (p < .0001) and their interactions (p = .0041) affected the dimensional stability of the silicone. Statistical significant dimensional differences occurred between groups with (0.071) and without opacifiers (0.053). Accelerated aging influenced the dimensional stability of the samples. All groups scored 2 in the detail reproduction tests, which represents the fully reproducing of three test grooves with accurate angles. Conclusions Incorporation of opacifiers alters the dimensional stability of silicones used in facial prosthetics, but seems to have no influence on detail reproduction. Accelerated aging is responsible for most of the dimensional changes in Silastic MDX4 4210, but all dimensional changes measured in this study remained within the limits of stability necessary for this application.
نوع الوثيقة: article in journal/newspaper
اللغة: English
تدمد: 1475-925X
Relation: http://www.biomedical-engineering-online.com/content/9/1/85; https://doaj.org/toc/1475-925X; https://doaj.org/article/4acd45da12124a36bfe05fa329292888
DOI: 10.1186/1475-925X-9-85
الاتاحة: https://doi.org/10.1186/1475-925X-9-85
https://doaj.org/article/4acd45da12124a36bfe05fa329292888
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