in vivo appearance of the oral cavity

In vivo Appearance of

the Oral Cavity

Dr. Syed Jaffar Abbas Zaidi

MD, RDS, MSc. (Oral Biology), MFDS RCPSG, MFD

RCSI, FAIMER

Learning Objectives

• Use correct and appropriate anatomical and dental terminologies to
describe, accurately and in detail, all the visible features present in
the mouth
• know the functional significance of lip posture and of producing an
anterior oral seal and appreciate the clinical significance of normal
and abnormal lip postures
• understand that clinical situations in the mouth may be related to
normal variation, or disorders that highlight normal features that may
• otherwise be inconspicuous, or be common benign disorders or less
common severe (possibly life-threatening) disorders.

Oral cavity

Anterior Oral Seal

Oral Cavity

Linea Alba

Palate

A

B

Tongue

Floor of the mouth

• Mylohyoid muscle

• The two mylohyoid muscles together form the diaphragm for

the mouth and delineate the floor of the mouth from the
suprahyoid region of the neck (although both regions
communicate at the posterior edges of the diaphragm).

Black Hairy Tongue

Dorsum of the tongue

Tori

Torus

Intraoral
Examination

• Choose a lab partner
• Get paper sheets of rolls to

cover your counter top work
area

• One student is the “doctor” &

one is the “patient”; then
reverse roles

• Don disposable examination

gloves before you begin your
exam

• Use mouth mirrors for your

exam

L-1
L-3

LYMPH NODES
PALPATION

SALIVARY GLANDS

EXAMINATION

TMJ EXAMINATION

WHAT TO DO NOW??

1)Perform Intra oral and extra oral examination and record
Dental charting by using FDI/ Palmar zygmody/ universal
system(one system at a time)on fellow student and record
the findings
Instructions::
• Attendance will be marked of those only who perform both

tasks

• used gloves, masks and wooden spatula/tongue depressors

should be discarded in dustbin after examination

Tutorial Questions

• What are the primary and secondary functions of the oral cavity ?
• What is vestibular fornix and oral cavity proper and what are its

boundaries ?

• Enumerate the boundaries of lips ?
• Where are the labiomental, philtrum and nasiolabial grooves ?
• What is anterior oral seal and how is it achieved ?
• What is the difference between competent and incompetent lips ?
• What are the consequences of incompetent lips ?
• Where is free gingival groove found ?
• What is the difference between attached gingiva and alveolar mucosa ?
• Where is interdental papilla found ?

• Where does the parotid duct drain in the oral cavity ?
• What is the name of the parotid duct, submandibular duct and sublingual

ducts in the oral cavity ?

• What is the difference between hard palate and soft palate in terms of

mucous membrane ?

• What is palatine raphe and pterygomandibular raphe ?
• Where are the fovea palatini found and their significance ?
• Name the papillae of the tongue and their locations ?
• Where are foliate papillae found and what is their function ?
• What is black hairy tongue and how is it formed ?
• What is smoker’s kerotosis or smoker’s palate ?
• Where is linea alba found and how is it formed ?