Impressions for Removable Prosthodontics Flashcards
What do we aim to record when taking a primary impression
we want you to record the functional depth and acceptable width of sulci in specific areas
Where should the operator stand when taking a lower impression
From the front
Where should the operator stand when taking an upper impression
From behind the patient
How should patient be position when taking a lower impression
Patients mouth about elbow height
Patient should be upright
How should patient be position when taking an upper impression
Patients mouth about elbow height
Patient should be slightly reclined
List the 3 steps we follow when taking a primary impression
- Insert
- Postion
- Seat
How do we insert the tray to take a primary impression
Rotational insertion
Retract one corner of the mouth with your left hand and the other corner with the anterior part of the tray
Rotate in
What can we ask the patient to do when we take a Lower impression to make sure it it seated properly
Can ask your patient to lift the tongue as you seat the tray
Make sure you seat posterior then the anterior
List the step we take before taking a primary impression
- Tray selection
- Adaptation of the tray
- Alginate impressions
Name the 2 types of trays we can use to take primary impressions
- Box tray
2. Curved tray
Who are box trays used for
For dentate patients (patent with teeth)
Who are box trays used for
Edentulous patients
How do we choose the size of the tray?
- Choose the posterior width
- There should be 2-3 mm space buccal to the teeth/residual ridge
- Look at the length of the tray if the posterior width of the tray is right we alter the length
Which do we prefer to alter the posterior width or the length of the tray
Length of the tray
Which stage is key for making consistently good primary impressions
The tray adaptation stage
