interocclusal patient records

Question 1

interocclusal record

Answer 1

1) relate the casts for mounting
2) must provide stable vertical and horizontal support

Question 2

options for mounting

Answer 2

1) dentate
- hand articulation (highest accuracy if their bite is very stable)
- MI record
- prep index
- Cr record (open bite)
2) partially edentulous
- record base in CR or MI
3) edentulous
- record in CR

Question 3

hand articulation

Answer 3

1) if a stable tripod remains after a tooth or teeth have been prepped, no record is needed
2) use patient’s existing VDO
3) can be hand articulated
4) often most accurate

Question 4

how to verify MI mouting

Answer 4

1) does it match the articulator mounting
2) for crown case, both the master cast and diagnostic cast should have same inter occlusal relationship

Question 5

posterior group function

Answer 5

1) no guidance on cuspids

Question 6

MI mouting

Answer 6

1) when stability is uncertain, capture an MI record in an OPEN bite area
- when there are a lot of open contacts
2) use a horseshoe bite for orientation and trim into useable segments
- if the prepped tooth is part of the tripod, then a prep index record is needed for stability

Question 7

why would you need a CR record

Answer 7

1) occlusal splint
2) any partial denture case with a CR-MI slide
3) any implant case with a CR-MI slide
4) all full denture cases
5) esthetic restorative case with a CR-MI slide
6) crown case with CR-MI slide

Question 8

how to check the quality of your CR cast

Answer 8

1) mounting matches the initial CR contact in the patients mouth
2) the dimensions of the slide is the same

Question 9

case: why is there so much wear on the patient’s left side?

Answer 9

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Question 9

CR or MI record bases

Answer 9

1) if most of the posterior teeth are prepped or oppose edentulous spaces, a record base is needed to mount the casts
2) use patient’s VDO for MI record

Question 10

after the rubber dam