Contact angle hysteresis on dentin surfaces measured with ADSA on drops and bubbles

Dentin wetting by three adhesive systems: Influence of etching time, temperature and relative humidity

“…5,10,25,26 Experimental investigations, taking into account slightly dry dentin, are still limited. 23,25 It is likely that such studies were compromised by difficulty in obtaining consistent drying processes, and consequently fail to reproduce surfaces with similar characteristics.…”

Modification of food contacting surfaces by plasma polymerisation technique. Part I: Determination of hydrophilicity, hydrophobicity and surface free energy by contact angle method

“…In the past several decades, numerous techniques (Bae et al, 2001;Chen et al, 2001;Grundke et al, 1996;Kaminska et al, 2002;Lam, Wu, Li, Hair, & Neumann, 2002;Luner & Oh, 2001;McGuire & Kirtley, 1988;Oh & Luner, 1999;Ö zden et al, 1995;Roudman & Di Giano, 2000;Santos et al, 2004;Tusek et al, 2001Wege et al, 2002 have been used to measure contact angle which were inspired by the idea of using the equation first derived by Thomas Young in 1805 (Lam et al, 2002). It is well known that the Young equation (Wege et al, 2002) c lv cos h ¼ c sv À c sl ð1:1Þ…”

“…c lv is the liquid-vapor surface tension, c sv is the solid-vapor surface tension, c sl is the solid-liquid surface tension, and h is the Young contact angle. The key condition for the derivation of YoungÕs equation is the requirement of smooth, homogenous, inert, non-porous and non-deformable solid surface (Grundke et al, 1996;Wege et al, 2002). It has to be chemically and physically inert with respect to the liquids to be used.…”

Characterisation of ‘wet’ polymer surfaces for tissue engineering applications: Are flat surfaces a suitable model for complex structures?

“…Contact angle measurements are sensitive to the chemical composition of the top molecular layer and are relatively simple, inexpensive, and a widely accepted technique for characterising flat polymer surfaces, in terms of wetting and adhesion properties of the polymer surfaces. If it is desired to investigate the wetting behaviour of highly hydrated or solvated materials surfaces and even the interaction between such surfaces and proteins [21,30], the captive bubble technique has to be used [31][32][33]. However, this technique has severe limitations in its ability to assess the wettability of 'wet' porous polymer structures.…”