ppt. on the topic maxillary sinus

1. Maxillary sinus:
It’s the pneumatic space that is lodged inside the body of maxilla and
that communicate with the environment by the way of middle meatus
and the nasal vestibule.
Introduction:
Paranasal sinuses (PNS) are air containing bony spaces around nasal
cavity.
Usually lined by respiratory mucous membrane of ciliated columnar
epithelium.
4 paired (bilateral) PNS are:
-Maxillary
-Frontal
-sphenoid.
- Ethmoidal.

3. • Maxillary Sinus Infection:
• When inflammation develops in the sinus
either due to infection or allergy, it is defined
"sinusitis" and it's the most common disease of
the sinus.
• Maxillary sinusitis could be broadly divided
into:
• • Acute
• • Sub-acute
• • Chronic

4. Dental Implication of Maxillary
Sinus
• Maxillary Sinusitis of Dental Origin:
• Spread of infection from peri-apical or
periodontal lesions.
• Over extension of sealers , cements , GP or
silver cones.
• Periapical surgery of maxillary posterior teeth.
• Iatrogenic: sinus perforation or instrument
breakage

6. • Toothache of Maxillary Sinus Origin:
• In sinusitis a feeling of constant dull aching
pressure or discomfort could be felt on the
posterior maxillary teeth.
• Etiology:
• Part of the nerve supply of the sinus is
posterior superior alveolar nerve that supply
the posterior teeth at the same time.

7. • Clinical Characteristics of Sinus Toothache:
• Dull, constant, non-pulsating aching pain in maxillary
posterior teeth and sometimes all the teeth in the affected
side.
• Infra-orbital redness.
• Toothache is increased with lowering or bending forward the
head.
• Pain on palpation of the affected sinus.
• Pt. may complain of feeling of teeth elongation.
• Teeth are sensitive to percussion or chewing and to cold
drinks and food.

8. Oro-Antral Communication & Fistula
• Oro-Antral Communication: (OAC)
• Is an abnormal connection between the oral
cavity and antral cavity (maxillary sinus) as a
result of loss of the soft and hard tissues
that normally separate both compartments.

9. • Oro-Antral Fistula: (OAF)
• Is a pathological fistular canal lined with
epithelium (stratified squamous epithelium)
which may or may not be filled with
granulation tissue or polyposis of the sinus
mucous membrane.

10. • Oro-Antral Fistula: (OAF)
• Is a pathological fistular canal lined with
epithelium (stratified squamous epithelium)
which may or may not be filled with
granulation tissue or polyposis of the sinus
mucous membrane.