Minor connector designs for anterior acrylic resin bases: a preliminary study.

The effect of nine different designs on the strength of acrylic resin attachment to the partial denture framework in anterior endentulous spaces was tested. Thirty metal frameworks, incorporating nine different designs and a control, were fabricated. Acrylic resin was processed to these frameworks, and the resin was subjected to a shear force. The framework designs offering strong retention for acrylic resin bases allowed the use of a greater bulk of acrylic resin projecting through openings in the metal retention design.