bones of nasal cavity masyitah mustaffa. overview: bones of the skull
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BONES OF NASAL CAVITY
Masyitah Mustaffa
Overview: Bones of the skull
Nasal Septum
1. Septal Cartilage2. Ethmoid bone3. Vomer
• A flat plate that descend from cribriform plate to form part of nasal septum
• Articulate with vomer inferiorly
Ethmoid Bone - Perpendicular plate
• Articulate with perpendicular plate of ethmoid, maxilla, palatine and sphenoid bone and septal cartilage
• Posterior border no articulation with other bone
Vomer
Base of Nasal Cavity1. Maxilla – Palatine Process of Maxilla2. Palatine Bone – Horizontal Plate of Palatal
Bone
• Extend medially to form the majority of hard palate
• Articulate with palatine process of opposite side and horizontal plate of palatine bone
• Present of incisive foramen
Maxilla - Palatine Process
• Form posterior portion of hard palate• Nasal cavity superiorly• On medial part, form by both horizontal
plate is posterior nasal spine• Has greater palatine foramina
Palatine bone – Horizontal Plate
Posterior Border of Nasal Cavity
Sphenoid Bone - Body
• The center of sphenoid bone• Anterior portion form part of nasal cavity• Contain sphenoid paranasal sinuses
Superior Border of Nasal Cavity
1. Nasal Bone2. Frontal Bone3. Ethmoid Bone
Nasal Bone
• Inferior portion form superior margin of nasal aperture• Inferior portion of nasal bone attach with lateral nasal cartilage and septal cartilage
Frontal Bone – Nasal Portion
• Articulate with nasal bone and frontal process of maxilla to form root of nose
Ethmoid Bone - Cribriform Plate
• A horizontal bone that form superior surface of ethmoid• Contain numerious foramina for olfactory nerves
Lateral Border of Nasal Cavity
1. Ethmoid Bone2. Lacrimal Bone3. Inferior Nasal Concha4. Palatine Plate
Ethmoid Bone – ethmoid labyrinth
• Largest part of ethmoid bone• Descend inferiorly from the cribriform plate• Ethmoid paranasal sinuses located within• Form 2 major structure within nasal cavity
• Superior nasal concha• Middle nasal concha
Lacrimal Bone
• Small and rectangular in shape• Inferior part of lacrimal form small portion of lateral wall of nasal cavity
Inferior Nasal Concha
• A curved bone that form part of lateral wall of nasal cavity• Articulate with maxilla and perpendicular plate of palatine, lacrimal, and ethmoid bone
Palatine Bone – Perpendicular plate
• Shape of vertical rectangle• Superior border is a notch articulate with sphenoid bone, form sphenopalatine
foramen• Form part of lateral wall of nasal cavity
Reference
• Netter’s Head and Neck Anatomy for Dentistry