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Sinuses. Oral Anatomy, DA102. Purpose of the Sinuses:. Purpose: Hollow cavities of the nasal sinuses function to lighten the overall bone weight of the skull Increase ability to breathe Provide voice tone. Four Pairs of Sinuses (bilateral).

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sinuses

Sinuses

Oral Anatomy, DA102

purpose of the sinuses
Purpose of the Sinuses:
  • Purpose: Hollow cavities of the nasal sinuses function to lighten the overall bone weight of the skull
    • Increase ability to breathe
    • Provide voice tone
four pairs of sinuses bilateral
Four Pairs of Sinuses (bilateral)
  • 1) Frontal: just above the orbital cavity (eyebrows).
  • 2)Sphenoid: deep in the highest and most posterior part of the nasal cavity.
sinuses con t
Sinuses (con’t)
  • 3) Ethmoid: between the eyes
  • 4) Maxillary:
    • Largest in adults, the sinus covers area from maxillary canine to 3rd molar and upwards
slide6

Please note the location of the sinuses on this x ray. If a patient loses a tooth in the sinus region, the sinus cavity will extend down into the location were the tooth was.

slide7
This x ray is of a patient that has implants for every tooth. Observe how close the implants are to the maxillary sinuses.