Border molding, technique and steps.... short slide

2. DEFINITION
• Border molding is the shaping of an
impression material by the manipulation or
action of tissues adjacent to the borders of an
impression tray

3. OBJECTIVE
• To determine the contour, height and
width of the borders of the complete
denture

4. ANATOMICAL LANDMARKS
Limiting structures:-
• Labial frenum
• Labial vestibule
• Buccal frenum
• Buccal vestibule
• Vibrating line

5. MATERIALS USED FOR BORDER
MOLDING
• GREEN STICK COMPOUND
• ELASTOMERIC IMPRESSION
MATERIALS (POLYETHER)

6. BORDER MOLDING TECHNIQUE
• OPEN MOUTH TECHNIQUE
• CLOSED MOUTH TECHNIQUE

7. IDEAL REQUIREMENTS OF MATERIALS
USED FOR BORDER MOLDING
• Allow some pre shaping of the form of the borders without adhering
to the finger
• Have a setting time of 3 to 5 minutes
• Retain adequate flow while tray is seated in the mouth
• Readily trimmed and shaped so excess material can be removed and
borders are shaped before final impression is made

8. PROCEDURE FOR BORDER
MOLDING
1. Heating
2. Placing
3. Tempering
4. Inserting
5. Trimming

9. • For Maxilla
 Labial frenum:
Outward, Inward And Downward
 Buccal Frenum:
Outward, Inward, Downward, Forward And
Backward
FUNCTIONAL MOVEMENT

10. • For Mandible
 Labial frenum: Outward, Inward, And
Upward
 Buccal frenum:
Outward, Inward, Downward, Upward
And Backward

11. • After border molding, molded section is immersed in
cold water
• Evaluate the retention and stability of the border molded
tray

12. GREEN STICK COMPOIND
ADVANTAGES
•Corrections can be made
•Less expensive
•Less technique sensitive
•No imbibition and synerisis
DISADVANTAGES
•Poor surface detail
•Time consuming procedure
•More number of tray insertions
•Discomfort to the patient

13. FINAL PROCEDURES
• After border molding, the tray should
be prepared before making the
secondary impression
• Space should be created for final
impression material
• If necessary, the thickness of the
border should be adjusted
• The objective is to avoid recording
denture bearing tissues in a displaced
or distorted position.