classification of soft palate and residual ridge

CLASSIFICATION OF CLASSIFICATION OF SOFT PALATESOFT PALATE

ANDAND RESIDUAL RIDGE: RESIDUAL RIDGE:

SHAPE, FORM,SHAPE, FORM, MUCOSA MUCOSA

SANAA SANAA

ASDC 49ASDC 49

SOFT PALATESOFT PALATE

MORPHOLOGICAL VARIETIESMORPHOLOGICAL VARIETIES

(based on cephalometric (based on cephalometric studies)studies)

Type1: Leaf Type1: Leaf shaped

Type2: Rat tail shapedType2: Rat tail shaped

Type3: Straight lineType3: Straight line

Type4: S-shapeType4: S-shape

Type5: Crook shapedType5: Crook shaped

Continued…Continued…TYPE 1: Leaf shapedTYPE 1: Leaf shaped TYPE 2: Rat-tail TYPE 2: Rat-tail

shaped shaped

Continued…Continued…

TYPE 3: Straight TYPE 3: Straight lineline

TYPE 4:”S” TYPE 4:”S” shapedshaped

Continued…Continued…TYPE 5:Crook TYPE 5:Crook

shapedshaped

Classification: Based on the Classification: Based on the Angulation between Hard Angulation between Hard

and Soft Palateand Soft Palate

Class I: Soft Palate is almost horizontalClass I: Soft Palate is almost horizontal

Class II: Soft Palate turns downwards atClass II: Soft Palate turns downwards at

an angle of 45an angle of 4500 from hard from hard PalatePalate

Class III: Soft Palate turns downwardsClass III: Soft Palate turns downwards

sharply at an angle of 75sharply at an angle of 7500 fromfrom

hard Palatehard Palate

RESIDUAL RESIDUAL RIDGERIDGE

SHAPESHAPE

FORMFORMI: I: Pre-extractionPre-extraction

II: II: Post extractionPost extraction

III: III: High, well roundedHigh, well rounded

IV: IV: Knife edgeKnife edge

V: V: Low, well roundedLow, well rounded

VI: VI: DepressedDepressed

MUCOSAMUCOSA

Type: Masticatory mucosaType: Masticatory mucosa Mucous membrane covering Crest of Mucous membrane covering Crest of

the Ridgethe Ridge Mucous membrane covering Slopes Mucous membrane covering Slopes

of the Ridge of the Ridge Firm and resilient mucous membraneFirm and resilient mucous membrane Flabby and hyper-mobile mucous Flabby and hyper-mobile mucous

membranemembrane

Flabby RidgeFlabby Ridge