Manuals_files/CD Manual 12.pdf - Removable Prosthodontics

Maxillo-mandibular Relationships - 36
are just barely touching the rims together. If you see contact between rims ask the patient
to stop closing, so they do not contact the rims and possibly translate from hinge position.
10. Never instruct the patient to bite firmly - this can cause translation/ inaccuracy.
11. Stabilize the patient’s mandible while the material sets (never make a record without
keeping your hands in place - if you feel movement during setting, redo the record).
12. Hold this position for approximately 1 minute (or other required set time of your media)
and have the patient open and remove both rims together. Separate carefully.
13. Reseat and ensure the record is repeatable. Make
sure the record does not capture the sides of the
occlusion rims. If it does, it will be difficult to
confirm whether the record was taken at the
hinge position, because the portion of the
registration capturing the sides of the rim will
guide the patient into the same closure whenever
they close – it will look repeatable only because
the patient cannot close in any other position.
Don’t capture the side of the ridge in
your record
14. Remove the records and rims and seat your casts into the record bases extraorally.
Ensure the record bases fit together with no space between the rims and the records. If
you do see spaces, look for interfering contacts between casts and or rims that may be
preventing full seating into the records. Do NOT mount the casts unless you can get full
seating into the registration. As a last resort, make a new record to ensure the first record
is not inaccurate.
15. Increase the height of the incisal pin l mm., and invert the articulator.
16. Place wax rims together, and lute them together with sticky wax - 4 spots between the
wax rims or use tongue blade sticks and sticky wax to immobilize your casts during
mounting. If you mount your casts without immobilizing them, you can introduce a
mean occlusal discrepancy of close to 1.6mm (vs. 0.25 mm with sticks & sticky wax)
(Gunderson & Siegel, J Prosthodont 2002).
17. Mix mounting plaster to creamy consistency - place on cast and ring - close articulator -
smooth the mounting plaster. Return the incisal pin to its original height after the record
has been removed. The occlusal rims should be touching evenly, over the entire occlusal
surface with no contact of the maxillary and mandibular casts or record bases. Only the
occlusions rims should be contacting.