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Formation of a gap or groove between the cavity preparation margin and the restorative material.


n See ditch.
References in periodicals archive ?
Following our acquisition of the Fen Ditching Company, we hope to be clearing the ditches and lakes of the Sandringham Estate on an annual basis.
The Fen Ditching Company has contracts for local drainage boards in East
The Foreign Ministry said: "The ditching is planned to take place in the open sea, far away from sea and air routes.
But when man began ditching and building roads, the swamp's natural hydrology was wrecked, its critical wet/dry cycle damaged.