anatomy of periodontium

Question 1

What is the difference between thin and thick periodontal phenotype

Answer 1

Profile: thin: highly scalloped soft tisue and bone contours. Thick: relatively flat soft tissue and bone contours

Soft tissue texture: Thin: delicate and friable. thick: dense and fibrotic

width of Keratinised gingiva and attached gingiva: Thin: minimal amounts. Thick: relatively large amounts

Bone thickness: Thin: Thin bone with bony dehiscencea nd fenestration. Thick: Thick bony ledges

reaction to insults: Thin: readily reacts with gingival recession. Thick: relatively resistant to acute trauma and raects with pocket or intrabony defect formation

shape of tooth: thin: triangular thick: square

Question 2

where does the sulcular epithelium extends from

Answer 2

from the crest of the gingival margin to coronal limit of junctional epithelium

Question 3

what is the funcion of sulcular epithelium

Answer 3

acts as a semi permeanle membrane thruogh which injurious bacterial products pass into gingiva

Question 4

where does the junctional epithelium start and end

Answer 4

extends from the cej to the bottom of the sulcus

Question 5

what is the epithelium of sulcular epithelium

Answer 5

thin non keratinisde or parakeratinised stratified squamous epithelium

Question 6

what is the epithelium of junctional epithelium

Answer 6

non keratinised stratified squamous epithelium

Question 7

where does GCF come from, and what are its function

Answer 7

fluid seeps into ginigival sulcus from gingiva CT through the oral sulcular epithelium

It cleanse material from sulcus, contains plasma proteins that may improve adhesion of epithelium to tooth, possess antimicrobial properties, and exert antibody activity to defend gingiva

Question 8

what are the functions of the ct fibers

Answer 8

1. brace marginal gingiva firmly against tooth
2. provide rigidity to withstand forces of mastication without being deflected away from tooth surface
3. to unite free marginal gingiva with cementum of root and adjacent attachde gingiva

Question 9

what are the types of CT fibres

Answer 9

1. circular fibres
2. alveolo gingival
3. dento gingival fibers
4. dento periosteal fibres
5. transeptal fibres

Question 10

how is the blood supply of the periodontium. name the mnemonic

Answer 10

All Dogs In Russia Piss

Alveolar artery–> Dental artery–> intra septal artery–> rami perforantes–> anastomose with Periodontal vessels in PDL space

Question 11

where does free gingia receives its blood supply from

Answer 11

supraperiosteal blood vessel, PDL blood vessels, blood vessels of alveolar bone