1. Construction of Base Plates and Occlusal Rims
DA122 Dental Materials

2. Base plate and occlusal rims
One of first steps in construction of dentures
Base plate-represents body of denture
Occlusal rim-wax block. Used by lab technician to place denture teeth

3. Steps
The teeth are articulated in the lab, tested in the patient’s mouth-final fittings completed
Last step-construction of dentures:
Investment or covering of rims
Wax is replaced by acrylic-forms denture base

4. Denture Teeth
Setting teeth in wax

5. Video

6. Lab Activity 1. Prepare edentulous model
Use marker or pencil to mark around area where denture will fit
Sprinkle model with baby powder
2. Soften a half sheet of baseplate wax with alcohol torch
Using gloved fingers press wax onto form
3. Trim excess wax with a lab knife or scalpel
1/6 to ¼ inch around mucobuccal fold area

7. Lab continued
4. Contour wax into mucobuccal fold-pressing against plate and conforming to pencil line
Use a pencil eraser
Do not tear wax