The conventional removable partial denture is inserted by means of a path where all rests are seated sinulltancouly, but a rotational path partial denture seats its first segment of a rigid retainer, which contains the long rest of the center of rotation first, and then the removable partial denture is rotated, positioning the second segment of a conventional clasp to the final seat.
There are three basic types of rotational path that can be used : the anterior-posterior, the posterior-anterior, and the lateral path.
The purpose of this article is to apply several basic principles of rotational path clinically so that many problems caused can avoid when the design for use of the rotational path is indicated.
In this clinical Study of both the unilateral extension removable partial denture of classⅡ mod.1 with missing anterior teeth and the tooth-borne removable partial denture with missing posterior teeth, the above removable partial dentures were fabricated by the
several basic principles with precautions to be taken using a rotational path and by the elaborate laboratory procedures, and then the following re: ults were obtained.
1. In case of posterior-anterior rotational path replacing posterior teeth :
1) As a long channel rest seat was prepared in the previously restored amalgam, the finacial burden to make a surveyed crown was reduced.
2) The good oral hygiene results were established because the use of conventional clasp arm was minimized using the rigid retainer and also the prosthetic function was excellent.
2. In case of anterior-posterior rotational path replacing anterior teeth, the good results were obtained financially, functionally and esthetically even without the use of precision attachment in the anterior teeth.
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