Evaluation of bond strength of resin cements using different general-purpose statistical software packages for two-parameter Weibull statistics

Dental Materials : Official Publication of the Academy of Dental Materials
Malgorzata Roos, Bogna Stawarczyk

Abstract

This study evaluated and compared Weibull parameters of resin bond strength values using six different general-purpose statistical software packages for two-parameter Weibull distribution. Two-hundred human teeth were randomly divided into 4 groups (n=50), prepared and bonded on dentin according to the manufacturers' instructions using the following resin cements: (i) Variolink (VAN, conventional resin cement), (ii) Panavia21 (PAN, conventional resin cement), (iii) RelyX Unicem (RXU, self-adhesive resin cement) and (iv) G-Cem (GCM, self-adhesive resin cement). Subsequently, all specimens were stored in water for 24h at 37°C. Shear bond strength was measured and the data were analyzed using Anderson-Darling goodness-of-fit (MINITAB 16) and two-parameter Weibull statistics with the following statistical software packages: Excel 2011, SPSS 19, MINITAB 16, R 2.12.1, SAS 9.1.3. and STATA 11.2 (p≤0.05). Additionally, the three-parameter Weibull was fitted using MNITAB 16. Two-parameter Weibull calculated with MINITAB and STATA can be compared using an omnibus test and using 95% CI. In SAS only 95% CI were directly obtained from the output. R provided no estimates of 95% CI. In both SAS and R the global comparison of the characteristi...Continue Reading

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Apr 24, 2012·Journal of the Mechanical Behavior of Biomedical Materials·Bogna StawarczykMalgorzata Roos

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Citations

Feb 21, 2016·Journal of the Mechanical Behavior of Biomedical Materials·Ehsan HomaeiEdmond Ho Nang Pow
Oct 2, 2013·The Journal of Prosthetic Dentistry·Timea WimmerBogna Stawarczyk
Feb 5, 2015·Clinical Oral Investigations·Annette WiegandBogna Stawarczyk
May 31, 2013·Dental Materials Journal·Bogna StawarczykPatrick R Schmidlin
Jul 16, 2014·Dental Materials Journal·Timea WimmerBogna Stawarczyk
Dec 17, 2014·Dental Materials : Official Publication of the Academy of Dental Materials·Lukas BütikoferMalgorzata Roos
Jun 9, 2016·Journal of the Mechanical Behavior of Biomedical Materials·Wei-Sheng Lei, Peng Su

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