Hybrid Cast/Flexible Partials

When the stability of a cast partial is required, but the patient demands the esthetics of a flexible partial, prescribe a hybrid cast/flexible partial. These partials consist of a cast subframe made with either standard or Vitallium 2000 alloy and a flexible partial injected onto the subframe. Choose from Valplast, FRS, or TCS material for the flexible material which will make up the saddles and clasps of the partial. Any major connector design that would be used for a standard cast partial can be used for the hybrid cast/ flexible partials. On the maxillary arch, horseshoe, palatal strap, and A-P strap designs are all acceptable, depending upon the limitations presented by the case. On the mandibular arch, lingual plates and lingual bars are no problem. When retention presents a concern, we can keep the posterior teeth clasped with standard cast clasps, while maintaining the esthetics of the flexible material on the saddles and anterior teeth.

 

When rebasing hybrid partials:

Before you insert the partial into the mouth for a wash pick-up impression, inject a small amount of impression material around the buccal of the clasped teeth at the gingival and cervical area. This will ensure that the undercut areas are captured. While you want the saddle areas of a hybrid partial covered by the impression material, it is very important that the impression material does not flow over the major connector of the framework. If you remove the pick- up impression from the mouth and see the metal major connector or lingual plate covered by impression material, you must remove the partial and take a new pick-up impression.

Lower Cast Subframe - Thermoflex clasps Cast Subframe - Valpast Saddles