1. Removable Partial Denture
Mandibular major connector

2. Types of mandibular major connectors
I-lingual bar.
II-sublingual bar.
III- lingual bar with cingulum bar).
IV-lingual plate.
continous bar).)V-cingulum bar
V!-labial bar.

3. I-Lingual bar. Indication:
It is the first choice major connector, should be used whenever the functional depth of the lingual vestibule equal or exceed 8mm.

6. 2.Sublingual bar Indications:
When the lingual bar cannot be used because the of a lack of functional depth of the lingual vestibule.
Contra indication:
1.lingual tori
2.high frenal attachment
3.excessive elevation of the mouth during movement

8. 3.Lingual bar with cingulum bar(continuous bar ):
Indications:
1.When indirect retention is required.
2.When wide diastemata exist between mandibular anterior teeth and linguoplate would oblectionably display metal infrontal view .

10. 4.Lingual plate Indications:
1.When less than 8 mm between marginal gingiva and the activated lingual frenum
2- cl 1 situations .
3.For stabilizing periodfntally weakened teeth.
4-when most posterior teeth are lost and additional indirect retention is required

13. 5. cingulum bar(continuous bar ):
5.cingulum bar(continuous bar ): ***it is indicated in case with the large diastema to avoid unesthetic display of matel *severely undercut lingual alveolus *considerable gingival recession *inoperable tori

15. 6.Labial bar Indications:
1.When the mandibular teeth are so severely inclined lingually as to prevent the use of lingual major connector.
2.When large lingual tori exist and their removal is contraindicated.

17. THANK YOU