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Removable Partial Denture

Mandibular major connector

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.

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.

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

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 .

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

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

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.

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