Impressions and Occlusion for Replica Dentures Flashcards
What are the stages in replica construction?
- Assessment of patient and dentures
- Replica impressions
- 2nd imps and occlusion
- Trial insertion visits (tooth trial)
- Insertion (delivery)
- Maintenance (review)
- Aftercare
1 visit less than conventional
What are the objectives of replica impressions?
Create a replica that is dimensionally accurate
Replica should have a solid base for recording the working impression
Replica should have occlusal and polished surfaces that can be easily modified
Why should old dentures be temporarily modified with greenstick?
To check the assessment is correct
To make later stages easier
What are the aims of the 2nd imps and occlusion visit?
Determine tooth position
Take master impressions
Record the occlusion
Select teeth (and shade)
What is the normal order of the second visit?
Check replica blocks
Modify replica blocks
Take impressions
Record occlusion
What is the order of the second visit if retention is poor?
Check replica blocks
Take impressions
Modify replica blocks
Record occlusion
What is the ideal freeway space?
2-4mm
What material should be used to take the master impressions
Light body silicone impression material
Describe the clinical technique of taking the master impressions
Rotate the tray into patients mouth
Seat the tray fully and manipulate the lips and cheeks (tongue protruded with lower)
Use a closed mouth technique
Remove the impression
How should the master impressions be assessed?
Ensure impression covers whole of denture bearing area
Sulci - rounded free from defects
Correctly shaped and extended
Width - related to the width of the patients sulcus during function
Should be suitable to produce a master cast
What is the difference between light body silicone and bite registration paste?
Dont know
What else needs to be done in this visit?
Pick a shade and mould
Fill in the prescription card
