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anatomy in relation to complet denture

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mina faheem

on 10 October 2013

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Transcript of anatomy in relation to complet denture

intraoral landmarks
anatomy in relation to complet denture
anatomy in relation to complet denture
imaginary line running from the inferior border of the ala of the nose to the superior border of the tragus of ear

used to
establish the posterior occusal plane of the artificial teeth
ala tragus line
inter pupillary line
imaginary line running btween the two pupils of the eyes when patient looking straight forward
naso labial sulcus
its acrease that extends from the ala of the nose to the corner of the mouth
it become deeper and more prominent with aging and due loss of teeth

it should be restored by proper denture contour and tooth position
mento labial sulcus
run from side to side horizontaly between the lower lip and chin
diamond shaped area at the center of the upper lip and base of the nose
vermillion border
its transitional epithelium between the mucos membrane of the lip and skin

it amount depend on the pulk of orbicularis oris muscle

in reduction of the vermillion border it should be restored by the denture
angle of the mouth
the denture should suppurt the angle of the mouth

lack support lead to

angular chielitis
angular chielitis
its afissuring and inflammation of the angle of the mouth due to continous dribbling of salivary secretion and decrease vertical dimension
the meeting place between the buccinator and other facial muscle near the angle of the mouth
intraoral maxillary landmarks
intraoral mandibular landmarks
alveolar ridge may be severely resorbed which affect retention of the denture
residual alveolar ridge
it is the part of alveolar process which remains after teeth extraction
the highest surface is called creast of the ridge

it's covered with alayer of firm fibrous C.T which is good for suppurting denture and resist denture movement
it's aprominence at the end of the maxillary alveolar ridge

it round bulge bounded by deep sulci

it give resistence to lateral movement of the denture

if it enlarged sergical reduction is done to give room for dentuer
maxillary tuberosity
palatine vault
it's formed anteriorly by the hard palate
& posteriorly by the soft palate

the alveolar arch forms the lateral and anterior boundaries of the vault

median palatine raphe
it's raised area of mucous membrane at midpalatal suture formed by union of two palatine process of maxilla

if it prominence it cause discomfort to the patient ,loss of retention of denture & may be fracture
it should be relived at this area
rugea area
irregular shaped ridges of C.T in anterior 2/3 of hard palate extending lateraly from the midline
it's serves as one of secondary stress bearing area
torus palatines
it's abony ridge at the centre of hard palate

if it small
the denture base must be
relieved at this area
if it large
surgical removal should be done
apear shaped elevation of soft tissue at the midline just posterior to the creast of edentulous ridge

after alveolar ridge resorption
pressure from denture in this area cause burning sensation
it should be relieved at this area
incisive papilla
fovea palatinae
they are two small bilateral indentations formed by mucous gland ducts

they are located in the posterior aspect of the palate on each side of the mid line close to vibrating line
hamular notch
narrow depression between the bony maxillary tuberosity and pterygoid hamulus

posterior palatal seal should extend through the hamular notch
vibrating line
it determine the posterior border of the upper denture at the junction of movable and immovable soft palate
it determined by two ways
1- 2mm posteriorly to
fovea palatinae
2- line from one
hamular notch to
the other
residual alveolar ridge
it is apart of alveolar process which remains after teeth extraction

it covered by fibrous C.T

it may severly resorbed which affects the retention of the denture

it act as secondary stress bearing area
retromolar pad
it is inverted pear shape area at the posterior end of the mandible creating from scarring after tooth extraction

it contain glands pterygomandibular raphe temporal tendon fibers of buccinator

it is primary stress bearing area
mental foramen
it located on the buccal surface of mandible in the premolar region

the montal nerve & vessels pass through

in case of flat ridge
pressure on the mental nerve cause anomilis
torus mandibularis
it is abony projection in the lingual surface of the mandible in the premolar region

if it small
the denture require relieve in this area

if it too large
it require surgical removal
it is abony ridge in the inner surface of the mandible

it begins from the region of the third molar

descends obliquely dowward and forward to the lower border of the mandible near the mid line
it infience the length of lingual flange

if it promenint it require relieve
internal oblique ridge (mylohyoid ridge)
external oblique ridge
median palatine raphe
buccal shelf
it is considered as primary stress bearing area of mandibular denture as the bitting forces are perpendicular on it

located between mandibular buccal frenum and the anterior border of masseter muscle

it is bounded externally by external oblique ridge and internally by the slope of the residual ridge

buccal frenum
masseter muscle
buccal shelf
genial tubercls
they are two small prominces on the inner surface of the mandible
they represent the attachment of the genioglossus and geniohyoid muscles

in the case of severe flat ridge
the will not able to withstand the pressure of the denture flange
they require relife in this area
stress bearing areas
the denture base must extend as far as possible withe out inter fering the health or function of the tissue

as the amount of bitting forces that an edentulous ridge will tolerate is directly proportional to the amount of surface area covered
primary stress bearing areas in maxilla
horizontal portion of hard palate
residual alveolar ridge
secondary stress bearing areas in maxilla
maxillary tuberosity
rugae area
median palatine raphe
primary stress bearing areas of the mandible
secondary stress bearing areas of the mandible
buccal shelf
retromolar pad
residual alveolar ridge
genial tubercles
boreder structure that limit the periphery of the denture
maxillary border structure
labial frenum
it is afold of mucous membrane extending from the mucous linning the lips toward the crest of the ridge

it must be relieved by making V shaped notch in the labial flange of the denture

labial vestibule
it is reflection of the mucosa of the lip to the mucousa of the alveolar process in the labial vestibule

the denture in this area is related to the orbicularis oris and superior incisive muscle

the muscle limit the thickness and length of the labial flange
buccal frenum
buccal vestibule
the denture in this area is related to the buccinator muscle
the contraction of the muscle lead to displacement of the denture
the denture should be relieved
hamular notch
vibrating line
mandibular border structure
labial frenum
labial vestibule
buccal frenum
buccal vestibule
buccal shelf
it form good support for the lower denture
lingual frenum
should be relieved to allow the movement of the tongue without impigination
retromolar pad
lingual pouch
masseter muscle
ligual pouch
the lingual flange is related to lingual pouch

posteriorly :- platoglossus muscle
anteriorly :- mylohyoid muscle
medially :- the tongue
laterally :- medial aspect of
done by :-
mina faheem awd alla
No :-
section :-
Uder the supervision of :-
Dr\ Ebrahim el Turky

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