BACKGROUND The purpose of this in vitro study was to evaluate the preventive effects of different protective agents on dentine erosion, measuring mean percentage weight loss. Dissolution of dentine under erosive challenges caused by soft drinks was analyzed: specimens were weighed following each immersion period, with mean percent weight losses calculated. MATERIAL AND METHODS Extracted teeth...

FIRST of all, Ladies aid (ientlemCn, I wishl to thank you and to say 10ow veIy proud I feel of the honour you have conferred uponl mlle by electing me as your President, the more so as, similar to my immediate predecessor, I too am occupying the chair of my father, but with shortcomings of which I am only too conscious, especially wheni 1 think of those who have precedled me (luring the long hi...

Proof of Theorem 4. For wa ∈ [c + ck, rck w−c ], we have the boundary equilibrium. From its definition, yb(ξ) is decreasing in wa (that is, dyb(ξ) dwa < 0) and yb(ξ) = μ + ξ + G−1( r−c−ck r ) when wa = c + ck. The total supply chain profit at the boundary equilibrium is Πtot(yb(ξ), yb(ξ), ξ) = rEmin(μ + ξ + , yb(ξ)) − (c + ck)y(ξ) from Equations (16) and (17). This function is concave and incre...