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Types of Maxillary Major Connectors

TYPE IMPORTANT FEATURES
Single palatal bar • Palatal connector component of less than 8mm in width is referred to as a bar
• It is the least logical of all palatal connectors
• To maintain rigidity it has to be made bulky
• Derives least support from the palate .
Palatal strap • It has suitable rigidity without excessive bulk
• Its width should be increased as the edentulous span increases in length .
• It is best suited for short span, tooth supported edentulous areas .
Anteroposterior Palatal Bar (double palatal bar) • In comparison to the amount of soft tissue coverage, it is by far the most rigid palatal major connector
• It is indicated in the presence of a torus that is not to be removed .
• Anterior bar is narrower than the width of palatal strap.
• Posterior bar is half oval; its width is equal to single palatal bar but less. bulky .
• Derives least support from the bony palate
• Not indicated in high narrow palatal vault and if the remaining teeth are periodontally weak
Anteroposterior Palatal Strap (Closed horse shoe) • It is indicated in almost any maxillary partial denture design .
• Structurally it is the rigid palatal major connector .
• The anterior border should be located posteriorly in the valleys between the rugae crests .
• Posterior border located at junction of hard and soft palates .
• It is the best designed palatal major connector.
U shaped or Horse Shoe shaped • Least desirable palatal major connector .
• Poorest designed palatal major connector because it lacks rigidity
• This is indicated only in cases of inoperable tori extending to the posterior limit of t he hard palate .
• It lacks rigidity
• This design leads to increased flexibility and movement at the open ends .
• The wider the coverage, the more it resemble a complete palate (palatal plate)
Complete Palate (Palatal plate) • It is the major connector that provides greatest retention .
• Due to accuracy and stability of the cast metal, posterior palatal seal is not necessary.
• The posterior border extends to the junction of the soft and hard palate .
• It is indicated when anterior or posterior teeth are to be replaced bilaterally .

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