Patent US 4,576,576

An article of manufacture for planning the restoration of an irregular dentition and being adapted for bilateral use comprising a rigid, formed template presenting an upper concave surface to the viewer while it is positioned above the model of the lower dentition of a patient; the mesial edge of the template is substantially linear and spaced apart from the lingual aspect of the anterior teeth. The proximal edge of the template is spaced apart from the mesial edge sufficiently to extend beyond the third molars. The opposing lateral edges of the template are flanged outwardly from the mesial edge to the distal edge to parallel the diverging dentition and both joining the distal edge; and the concave/convex of the template are of a preset substantially uniform curvature with the radius of the upper surface chosen to correspond to one of the variable radius, curves of Spee and Wilson normally occurring in an existing dentition under analysis.