Simplified procedure for making fixed partial dentures with a functionally generated path.

The functionally generated path (FGP) procedure is a sophisticated yet simple method for recording and using a precise pattern for occlusal and border movements1 Several methods for making wax “chew-in”r egistrations have been suggested. 2-7 These methods, following Meyer’s conceptzl 3 of the functionally generated path, have been helpful in establishing an occlusal anatomy that will function harmoniously with opposing teeth. When FGP procedures are carefully followed, minimal occlusal adjustments are required during the chnical try-in stagea However, mounting most FGP records requires specially designed articulators, such as the Twin-Stage Occluder (Hanau-Teledyne, Buffalo, N. Y.), and the Ventriculator Cl. F. Jelenko, Armonk, N.Y.? The most commonly used device is the Twin-Stage Occluder articulator, which permits articulation of one cast (working cast) against two opposing casts. One cast is made of the unmodified dentition and the other of the FGP record. In addition, boxing and pouring the FGP record is required. Numerous errors should be anticipated and avoided in making and mounting a cast of the FGP record. Over 60 years ago,Gysig postulated the relationship between the posterior and anterior determinants of occlusion. Therefore, one must keep in mind that occlusion is not only determined by its posterior determinants, but also by its anterior determinants or the anterior teeth. The more the anterior teeth are disoccluding the posterior teeth, the less one has to worry about errors.lO> l1 From a practical point of view, the anterior guidance is of extreme importance in cases where it is going to be lost during treatment. If the anterior guidance is preserved, the operator will be able to build the (FGP) pattern according to the patient’s original biologic and anatomic situation. Therefore, the incisal guidance should be considered one of the main factors for the success of this procedure, Like any other technique, the value of the described procedure is directly proportional to the operator’s experience and understanding of what is to be accomplished and why. Although only a single tooth is prepared and restored to demonstrate this procedure, multiple teeth can be restored without difficulty. This procedure enables the clinician to record occlusal and border anatomy at the correct vertical dimension of occlusion with simplicity and accuracy so that the afore-