Preparation for a Valplast Reline

Individual saddles can normally be relined using the injection repair technique (by a Valplast® laboratory). In the case where an overall reline is indicated, the case is normally jumped into a new base.

Take a rubber base impression under the case. The patient should close the mouth to assure full and correct occlusion as the rubber base material sets inside the partial. Once the rubber base impression has set, take an overall alginate impression and remove the case from the mouth inside the alginate impression. Make certain the case is positioned correctly in the alginate impression, and pour the model promptly. Send the model and case to the laboratory without separating the denture from the model.

The laboratory will register the position of the teeth using a plaster or putty matrix before removing the case from the model. A new base will be waxed up and reprocessed using the existing teeth.

Follow the same procedure of hot water immersion when fitting a repaired or relined Valplast® appliance as you do when fitting a new case.

Impression Tips—Tight Fitting Crowns

   ISSUE: Tight Crowns   


Cause and Solution:


1. Early Mouth Removal
     • Closely follow product recommendation for oral setting time.


2. Seating partially set impression material
     • Closely follow product recommendation for oral working time.


3. Poor bond of material to tray
     • Always use a VPS tray adhesive and allow to dry as per product instructions.

   ISSUE: Short Crowns   

Cause and Solution:

1. Insufficient Tray Support (weak or low tray walls)

     • Use custom or inflexible (preferably metal) stock trays.

2. Teeth in contact with tray and/or not adequately relieving  pre-set impression material

     • Avoid contact of teeth with tray, or pre-set tray material.

3. Insufficient die trimming

     • Consult with dental laboratory.