Figure 8-36.Fabricating mouthguards.
Vacuum-formed templates are made using clear
Heat the material until it sags about 1 1/2 to 2 inches,
splint material (.020-inch), a vacuum-forming
and vacuum-form the clear splint material over the
machine, and a cast. If the teeth that the dentist intends
cast. At first, the material appears cloudy and then will
to prepare have large cavities, fill in the defects with
become clearer. You know the material is overheated
dental cement and carve the cement to the proper
when you begin seeing small bubbles appear.
shape. If the temporary prosthesis is for a proposed
FPD site, also adapt spare resin denture teeth to the
edentulous space as shown in figure 8-37. Sticky wax
them in place and if needed, adjust the occlusion.
Splint material is not pliable like mouthguard
material, making it difficult to remove from the gross
soft tissue undercuts that may be present on the cast.
Use a heated Bard-Parker knife to cut away the excess
material in the sulcus areas and around the base of the
cast. You should now be able to pry the arch form
Place the cast on the vacuum-forming machine and
mount the plastic sheet below the heating element.