PRS03 - Lecture 5 - Metal Framework Try-In

Question 1

What is the aim of Metal Framework Try-in?

Answer 1

Ensure the partial denture framework fits

Question 2

What should you do before trying the metal-framework in the patients mouth? (6)

Answer 2

Check the dental stone cast - for: (6)

Broken teeth (glued back on)

Scratches on abutment teeth (clasps too tight)

Over-trimmed model

Air blows or blobs of stone (under the framework)

Drag marks

If the framework seats down correctly

Question 3

Decribe the clinical steps ot metal-framework try-in (7)

Answer 3

1) Examine the dental stone cast (6)

2) Place framework into patients mouth - do not force into place (not path of insertion)

3) Check if:

Rest seats engage

Major connector is flush with underlying tissue

Framework seats correctly

Framework interferes with occlusion

4) If it doesnt fit correctly - use occlude spray to determine which parts of metal framework are in contact with teeth

5) Clasps are adjusted using Adam’s pliers

6) Check occlusion using articulating paper (horse-shoe)

7) Labratory perscription: Please add wax occlusal rims to framework

Question 4

Give 2 reasons that would make you retake the secondary impressions? (2)

Answer 4

If framework still rocks after being fully seated down

If there is space under the posterior edge of the palatal major connector after being fully seated down