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Macorra García, José Carlos De La Pérez-Higueras Sánchez-Escalonilla, Juan 2023-06-19T13:33:43Z 2023-06-19T13:33:43Z 2014 Microtensile Bond Strength Test Bias Caused by Variations in Bonded Areas. The Journal of Adhesive Dentistry 2014;16:207–219. 1461-5185 10.3290/j.jad.a32068 https://hdl.handle.net/20.500.14352/34020 https//doi.org/10.3290/j.jad.a32068 http://www.quintpub.com/journals/jad Purpose: While it has been shown that no method produces specimens with exactly the same cross-sectional bonded area (BA), BA variations within and between studies are a well-known covariate in microtensile test results. However, no method has yet been described to accurately acount for its influence. A procedure is presented that allows controlling for variations of BA effects on results. Further, a proposal for reporting is presented which enables resuls of different studies to be compared. Materials and methods: partially using the results of the report in which the microtensile test was originally described, both general (caused by differences in BA) and specific (due to a material's performance differences and intrinsic biological varibility of specimens) variabilities were separated through linear regression of microtensile (MPa) to BA(mm2) pooled results. Comparing the specific variability of specimens-the residuals to the regression line-of groups allowed assessing differences between groups. Results: A means comparison of residuals showed that specific differences were significant (t-test, p=0.0004). The null hypothesis could be rejected : materials' performances were different. This could not be determined in the original report, since BA variability was very high. A proposal for reporting of results to facilitate their clinical interpretation and comparison between studies is presented. Conclusion:Controlling for general variability caused by differences in BA size allows precise comparison of microtensile tests results. spa restricted access Microtensile bond strength test bias caused by variations in bonded areas journal article