The Effect of Single Plane Curvature on Half-round Cast Clasps

Abstract
The quality of retention produced by a half-round cast clasp is affected by its curvature in the plane of its flat side. Uncurved clasps and those that curve 90.degree., 180.degree. and 270.degree. become progressively stiffer. Conversely, as the radius of the curvature increases, so does the flexibility of the clasp.