Bar Clasp

Removable partial denture (R.P.D), Prosthodontics

1. Bar Clasp
Made by -
CHELSEA PAUL
ROLL NO.: 12
II BDS (2020-21)

2. It is also known as GINGIVALLY APPROACHING CLASP
OR. ROACH CLASP. OR. VERTICAL PROJECTION
CLASP
A clasp Retainer of which bar-type extend from major
connectors or from within the denture base; the arms pass
adjacent to the soft tissues and approach the point of
contact on the tooth in a gingivoocclusal direction.

3. Design features :
●Approaches undercut area or retentive
area from gingival direction.
●Push type of retention.
●Flexible minor connector called
APPROACH ARM should be strong.
●Tissue side of the arm should be smooth
and polished because it contacts the
mucosa area

4. ●Approach arm tapers uniformly from attachment
to the clasp terminal.
●It never bridges the soft tissue undercut as there
can be chances of food lodgement.
●Approach and should cross the gingival margin at
90 degree.
●It is placed as low as possible on the tooth
surface and the clasp terminal should engage
with the distal undercut.

5. Types of bar clasp
1.T- Clasp
Retention arm resembles T-shape
● Indicated when undercut is on the Distal side and the
Non - Retentive area is above the height of contour.
●Both retentive terminals face towards the occlusal
surface.

2.MODIFIED T-CLASP
● . Non-Retentive terminal is absent
●Aesthetically preferred
● . Compromises Stability

6. 3. Y- Clasp.

● Same considerations like T- clasp.
● Height of contour is located high in mesial
and distal surface and the the cetntre area
is low or deep

4. I -Clasp

●Placed on the DistoBuccal surface of
Maxillary Canine.
●The tip contacts just 2-3 mm to the area
●But compromises stability

7. 5. I -BAR


● Modification of I - clasp
●Has a mesial Rest and I-bar
●For vertical support and
horizontal stability
●Contact should be at passive
area.

8. Indications
●Smaller undercuts in the cervical third
●in tooth supported with partial dentures
or in distal extension cases
Contra-indications
●Deep undercuts or soft tissue undercuts
● if retention and undercut area is away
from the Edentulous area

9. Advantages
1.Push type of retention
2.Easier for the patient to insert
3.Aesthetically superior
4.Less prone to caries

10. Drawbacks

1.Tendency of food lodgement
2.Cannot be used in Shallow vestibule
3. cannot be used in extensive undercut lingual or
buccal of in abutment tooth
Long
Undercut

11. Thankyou