PATIENT VISIT 3– Mounting the Mandibular Cast
Laboratory Procedures

 

After you have completed your centric relation recording, you are ready to mouth the mandibular master cast.

1. Place the previously mounted maxillary cast on the articulator.  Place the metal incisal guide table on the articulator and set the chisel-shaped end of the incisal guide pin in contact with the guide table.  The pin should be set at the zero mark.

2. Place the record bases on their respective master casts and verify that they are fully seated on the casts.  Use sticky wax to attach the record bases to the casts.  Lubricate a small area of the base of the mandibular cast with Vaseline.  Attach the maxillary cast to the articulator.  Invert the articulator.  Use sticky wax and broken tongue blades to attach the two bases to each other to prevent shifting during mounting.

3. Mix a small amount of mounting stone and place it on the base of the cast.  Also, place a small portion of stone on the mandibular mounting rim.  Close the articulator until the pin contacts the incisal guide table.  Permit the stone to set.  Be sure the balls of the condyles are fully seated in their respective fossae. 

4. When the stone has completely set, remove the sticky wax from the articulator and further smooth mounting.  If necessary add more mounting stone.

5. The mounting must be neat and clean.

6. Disinfect the record base, casts and articulator prior to leaving the operatory.  Disinfect the record bases by placing them into a ziplock bag and spraying into the bag with the current approved disinfectant .  Spray the articulator and casts with the current approved surface disinfectant  and allow to set for at least 10 minutes.  Disinfect shade guides by spraying with disinfectant provided in the clinic.