Effect of joint design and welding type on the flexural strength and weld penetration of Ti-6Al-4V alloy bars

The Journal of Prosthetic Dentistry
Paulo Cezar Simamoto JúniorLuís Henrique Araújo Raposo

Abstract

Framework longevity is a key factor for the success of complete-arch prostheses and commonly depends on the welding methods. However, no consensus has been reached on the joint design and welding type for improving framework resistance. The purpose of this study was to assess the effect of different joint designs and welding methods with tungsten inert gas (TIG) or laser to join titanium alloy bars (Ti-6Al-4V). Seventy titanium alloy bar specimens were prepared (3.18 mm in diameter × 40.0 mm in length) and divided into 7 groups (n=10): the C-control group consisting of intact specimens without joints and the remaining 6 groups consisting of specimens sectioned perpendicular to the long-axis and rejoined using an I-, X30-, or X45-shaped joint design with TIG welding (TI, TX30, and TX45) or laser welding (LI, LX30, and LX45). The specimens were tested with 3-point bending. The fracture surfaces were first evaluated with stereomicroscopy to measure the weld penetration area and then analyzed with scanning electron microscopy (SEM). The data were statistically analyzed with 2-way ANOVA and the Tukey post hoc test, 1-way ANOVA and the Dunnett test, and the Pearson correlation test (α=.05). Specimens from the X30 and X45 groups showe...Continue Reading

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Citations

Nov 10, 2015·The Journal of Prosthetic Dentistry·Nancy de Assis FerreiraHelio Rodrigues Sampaio-Filho
Sep 8, 2015·The Journal of Prosthetic Dentistry·Karina Albino LencioniRossana P Almeida
Dec 5, 2018·International Journal of Dentistry·Wilson MatsumotoTakami Hirono Hotta

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