Jaw registration

Question 1

Why do we take a jaw registration and record the occlusion?

Answer 1

So that we know if any proposed denture components may interfere with the occlusion

Question 2

When would you take a jaw registration?

Answer 2

When study casts cannot be had articulated, typically due to large free end saddle areas

Question 3

What is the first step in taking a jaw registration?

Answer 3

Make a dot for a reference point on the nose and the chin, then record the distance between them when teeth are in ICP (OVD - occlusal vertical dimension) then do the same but with the jaw relaxed (RVD-resting vertical dimension)

Then RVD - OVD = free way space

Question 4

How should you proceed after the nose - chin distance is recorded?

Answer 4

Try each wax record block in alone, and make adjustments to it with a hot palate knife so that the occlusal plane is correct and also the buccal contours

Occlusal plane should follow Ala-Tragus line

Question 5

Once the record blocks are in correct shape, what would you do?

Answer 5

Try them in together and make sure that the RVD remains the same.

Question 6

How do we now take the jaw registration once we know both record blocks fit?

Answer 6

Cut notches in each block then insert them both.

Squirt impression medium onto the blocks in order for them to stick together and get the registration