An attachment which has a patrix conical portion with a split head for activation and a matrix cap portion .
The Ceka attachment was developed as an extracoronal attachment. However, it can also be used for both root face abutments and bars. In the latter case it allows increased retention of the superstructure where a clip may not be provided. If the bar is short the placement of a clip may not be possible and therefore the use of such an adjustable attachment can provide the solution.
The attachment can be used for many different clinical situations . The matrix ring retainer can be placed in a variety of locations and the patrix component comes in different forms allowing it to be cast, soldered or bonded into place. The patrix has a cross split allowing for activation of this attachment with wear.
The attachment requires adequate space and the correct angulation relative to the path of insertion of the denture.
The technical stage of positioning this attachment parallel to the path of insertion of the denture requires the use of a parallelometer.