Using the path of insertion to retain a partial denture.

To resist these forces, dentistry has developed a wide variety of mechanical attachments that include circumferential clasps, bar clasps, indirect retainers, ring clasps, reverse loop clasps, hybrid clasps; and an assortment of precision attachments that include springs, flanges, snaps, latches, plungers and retentive arms. Despite dramatic differences in design, virtually all of these retention elements grip the abutment with enough rigidity to prevent any force from dislodging the prosthesis. Unfortunately, creating retention in this manner results in the following problems: