2

Removable Partial Denture

Mandibular major connector

Types of mandibular major connectors

I-lingual bar. II-sublingual bar. III-double lingual bar(kennedy 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.The double lingual bar:

Indications: 1.When indirect retention is required. 2.When periodontally affected teeth that require splinting are present.



4.Lingual plate
Indications: 1.When the functional depth of the lingual vestibule (less than 5mm) is not enough for bar placement. 2.When future loss of natural teeth is anticipated to facilitate addition of artificial teeth to the partial denture. 3.When splinting of anterior teeth is required. 4.When lingual tori is present. 5.when most posterior teeth are lost and additional indirect retention is required

5.cingulum bar:*it is also known as the continuous bar **it is located on or above the cingulum of the anterior teeth ***it is indicated in case with the large diastema to avoid unesthetic display of matel

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.

THANK YOU