The intra and extraradicular attachment have many types and clinical advantages such as their structures hidden under the denture, good retention and so on. In dental practice, however, the clasp is overwhelmingly prefered to the attachment because the latter is too expensive and complex in its procedure. In our department of prosthetics, the modified radicular attachment, of which the male was coupled with the clasp-like female, has been fabricated since nearly 8 years ago, resulting in a better retention and stability of the denture. This attachment employs many inherent merits of both clasp and attachment above mentioned, and is produced much more inexpensively and easily than the conventional one. Moreover, it is emphasized that even the useless tooth for the clasp, above all the tooth stump which has often been to be extracted can be efficiently utilized as the abutment for this attachment. When the intraoral condition at the alveolar ridge etc. was inadequate, the flange technique was applied together.
