DENTURE BEARING AREAS

• Supporting structures - primary stress bearing areas - secondary stress bearing areas - relief areas• Peripheral seal areas• Limiting structures

MAXILLARY ARCH

Limiting structures• Labial frenum• Labial vestibule• Buccal frenum• Buccal vestibule• Hamular notch• Posterior palatal seal area

Support areas

• PRIMARY

-Posterior ridge

-Flat part of hard palate

• SECONDARY

-Slopes of ridges

-Anterior ridge

-Palatine rugae

RELIEF AREAS

• INCISIVE PAPILLA

• MID PALATINE RAPHE

LABIAL FRENUM

BUCCAL FRENUM

Labial vestibule

•Labial flange

Buccal vestibule

Hamular notch

Area of hamular notch

Vibrating line:

• ..

Fovea Palatinae

POSTDAM AREA

Maxillary tuberosity.

Area of tuberosity

Hard palate

RESIDUAL ALVEOLAR RIDGE

Alveolar groove

Rugae.• .

Incisive papilla.

•Incisive fossa

•.

Median palatine raphae.

Median palatine groove

MANDIBULAR ARCH

PERIPHERAL STRUCTURES

• Labial frenum• Labial vestibule• Buccal frenum• Buccal vestibule• Alveololingual sulcus• Retromolar pads

SUPPORT AREAS

• PRIMARY

• Buccal shelf area

• Posterior ridge

• Pear shaped pad (levin)

• SECONDARY

• Anterior ridge

• Slopes of ridge

RELIEF AREAS

• Crest of ridge• Mental foramen• Genial tubercles• Torus mandibularis

Buccal frenum.

Buccal notch.

Labial vestibule.

• Muscles attachment close to the crest of the ridge- limits the denture flange extension.

• Mucolabial fold limits the depth of the flange.

• Record adequate depth and width.

• Proper contouring gives optimal esthetics.

Labial flange

Buccal vestibule.

.Buccal flange

Retromolar pad.

Retromolar fossa

Lingual frenum.

Lingual notch

Alveolo-Lingual sulcus.

Lingual flangePremylohyoid

eminence

Retromylohyoid space.

• .Retromylohyoid eminence

Genial tubercles.

• .

Buccal shelf

• .

Residual Alveolar ridge