applied anatomy anatomical land marks applied anatomy

Applied Anatomy

Anatomical Land Marks Applied Anatomy

www.departmentofprosthodontics.com

MAXILLA


MANDIBLE


Residual Alveolar Ridge

The bony process that remains after the teeth have been lost, is the residual alveolar ridge.


The Incisive Papilla:

Soft tissue pad covering nerve & blood vessels.

Constant in position – tooth arrangement.

Central incisors 09-mm labial, laterla incisor 11, canine 12


Labial & Buccal Freni

A narrow band of fibrous submucosal

tissue bridging the buccal, labial, or lingual

sulci.


Labial FrenumIt starts

superiorly in a fan

like shape and

terminates on the

labial surface of

the ridge usually

at midline.


Buccal Frenum


Labial Sulcus & Flange


Buccal Sulcus And Flange


Maxillary TuberosityThe maxillary

tuberosity is formed by the junction of the posterior wall of maxilla with alveolar process.


Pterygomaxillary/Hamular Notch

IT IS FORMED BY THE JUNCTION OF TUBEROSITY OF MAXILLA AND HUMULUS OF MEDIAL PTERYGOID PLATE


Fovea Palatinae


The Vibrating Line


Posterior Palatal Seal Area/Post Dam Area

Anterior Vibrating line

Posterior Vibrating line

Post Dam Area


Posterior Palatal Seal Area Post Dam Area


The Palatal Gingival Vestige


Rugae Area

They are a series of bilateral elevations on the anterior part of the palate.

They assist the tongue in speech


Palatine Raphe


TORUS PALATINUSThe symphysis

between the palatal processes of maxillae along the median sagittal suture consists of cortical bone.

The symphysis of excessively exostosed bone is referred to as torus palatinus.www.departmentofprosthodontics.com

MANDIBLE


Labial frenum Fibrous band .Unlike the maxillary

labial frenum,it is active.

Labial frenum has attachment of the incisivus and orbicularis oris muscle.

On opening wide,the sulcus gets narrowed.

Hence the impression will be narrowest in the anterior labial region.


Labial sulcusThis is space between the residual ridge

and lips.

The length and thickness of the labial flange of the denture occupying this space is crucial in influencing lip support and retention.


Buccal frenum

It extend from buccal aspect of residual ridge to cheek.

The fibers of the buccinator are attached to the frenum.


Buccal sulcusIt extends posteriorly from the buccal

frenum till the retromolar region.It is bound by residual ridge on one side

and buccinator on the other side.This space is influenced by the action of

masseter.when the masseter contracts, it pushes inward against the buccinator, producing a bulge into the mouth.it is reproduced as a notch in the denture flange called the masseteric notch.


masseteric notch


Buccal shelf It is area between the

buccal frenum and anterior border of the masseter. Its boundaries are:

Medially the crest of the ridge

Distally the retro-molar pad

Laterally the external oblique ridge

o The width of the buccal shelf area increases as alveolar resorption continues.


Retromolar padRetromolar pad as a

triangular soft elevation of mucosa that lies distal to the third molar.

It is an important structure, which forms the posterior seal of the mandibular denture.

It is bounded posteriorly by the tendons of the temporalis,lateraly by buccinator and medially by the pterygomandibular raphe and superior constrictor.


Mylohyoid ridgeIt runs along the

lingual surface of the mandible.

Anteriorly the ridge lies close to the inferior border of mandible while posteriorly,it lies flush with residual ridge.

Mylohyoid ridge should be relieved during complete denture fabrication.


ALVEOLOLINGUAL SULCUSthe space between the residual ridge and

the tongue extends from the lingual frenum to mylohyoid curtain.


Pterygomandibular RapheIt arises from the hamular process of the

medial pterygoid plate and gets attached to the mylohyoid ridge.

Superior constrictor is inserted posteromedially and the buccinator is inserted anterolateraly.


Sulcus; Modiolus

B Buccinator muscle

DAO Depressor Anguli Oris m.

II Incisivus Inferior m.

IS Incisivus Superior m.

LAO Levator Anguli Oris m.

OO Orbicularis Oris m.

ZM Zygomaticus Major m.www.departmentofprosthodontics.com

Functional Anatomical Relations


applied anatomy anatomical land marks applied anatomy

Documents

maxillary labial frenum

labial surface

frenum fibrous band

vibrating linewww

palatal processes of

junction of tuberosity

alveolar ridgethe bony

cortical bone