Porosities and bonding of maxillofacial silicone with embedded glass fibre-bundles

MM Hatamleh, DC. Watts

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Purpose. There are two null hypotheses: including mechanical mixing under vacuum will not reduce porosity (hypothesis 1),and pull-out strength of glass fiber-bundles embedded into maxillofacial silicone elastomer is not affected by interfacial pores(hypothesis 2). Methods and Materials. Two test groups (n = 20) were fabricated by embedding resin-impregnated fiber-bundles(1.5 mm diameter, 20 mm long) into maxillofacial silicone elastomer. Silicone was mixed with two procedures: (test group1) manual mixing only, and (test group 2) manual and mechanical mixing under vacuum. Additionally, control groups (3 and4) were prepared to examine silicone-porosity without fiber-bundles. Each specimen was scanned for porosity using MicroCT,producing 865 horizontal images, which were reconstructed and analyzed into a 3-D model. Pore numbers, volumes, and percentageswere calculated. Pull-out tests were performed to evaluate bond strength between fibre-bundles and silicone. Statisticalt-test and Mann-Whitney U tests for independent means were used to detect statistical significances (p
    Original languageEnglish
    Pages (from-to)15-23
    Number of pages9
    JournalInternational Journal of Anaplastology
    Volume2
    Publication statusPublished - Apr 2008

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