3. LIPS
2 PARTS: UPPER AND LOWER.
BEGINS AT THE JUNCTION OF THE
VERMILLION BORDER WITH SKIN.
FORMS THE ANTERIOR ASPECT OF ORAL
VESTIBULE.
4. ORAL TONGUE
TWO PARTS OF
TONGUE:separated by
circumvallate papillae
• PHARYNGEAL/BASE OF
TONGUE
• ORAL TONGUE
FOUR ANATOMIC SITES:
• TIP
• LATERAL SURFACE
• DORSAL
• VENTRAL
MUSCLES
• EXTRINSIC
• INTRINSIC
5. EXTRINSIC MUSCLES OF TONGUE
attachments outside the tongue
alter the position of the tongue
genioglossus muscle: mandible , forms the
majority of the tongue.
hyoglossus muscle-hyoid bone
styloglossus muscle-styloid process
palatoglossus muscle: palate
6. INTRINSIC MUSCLES OF TONGUE
ORIGINATE AND INSERT WITHIN THE
SUBSTANCE OF THE TONGUE
ALTERS THE SHAPE OF TONGUE
• SUPERIOR LONGITUDINAL
• INFERIOR LONGITUDINAL
• VERTICAL
• TRANSVERSE
8. BLOOD SUPPLY
ARTERIAL-
LINGUAL ARTERY-supplies
tongue and floor of mouth.
branch of
external carotid artery
VENOUS –
LINGUAL VEINS.
9. FLOOR OF MOUTH
• SEMILUNAR SPACE
• DIVIDED INTO RIGHT AND LEFT BY FRENULUM
• OVERLIES MYLOHYOID AND HYOGLOSSUS MUSCLE
• IT EXTENDS FROM LOWER ALVEOLAR RIDGE TO
UNDERSURFACE OF TONGUE
• POSTERIOR BORDER IS FORMED BY BASE OF ANTERIOR
TONSILLAR PILLAR
• CONTENTS:OSTIA OF SUBLINGUAL AND
SUBMANDIBULAR GLANDS
• SLINGS:ANTERIORLY : MYLOHYOID
• POSTERIORLY : HYOGLOSSUS
• NERVE:LINGUAL NERVE
10. HARD PALATE
PARTITION BETWEEN NASAL AND ORAL CAVITIES.
MARGINS:
ANTERIOROLATERAL-ALVEOLAR ARCHES AND GUMS.
POSTERIOR – SOFT PALATE
SUPERIOR- FLOOR OF NOSE
INFERIOR-ROOF OF ORAL CAVITY
11. ARTERIES: greater palatine of maxillary artery.
VEIN: pterygoid plexus of veins.
NERVE: greater palatine and nasopalatine branch of pterygopalatine ganglion.
13. BUCCAL MUCOSA
MUCOSAL SURFACE OF THE CHEEK AND LIPS.
ANTERIORLY FROM THE LINE OF CONTACT OF
OPPOSING LIPS.
POSTERIORLY TO PTERYGOMANDIBULAR RAPHE.
SUPERIORLY AND INFERIORLY : IT IS ATTACHED TO
THE MUCOSA OF ALVEOLAR RIDGE.
14. ALVEOLAR RIDGE
ALVEOLAR PROCESSES OF MAXILLA
AND MANDIBLE AND THE
OVERLYING MUCOSA
LOWER ALVEOLAR RIDGE:
OF BUCCAL GUTTER TO FLOOR OF
MOUTH
POSTERIOR MARGIN-ASC RAMUS
OF MANDIBLE
UPPER ALVEOLAR RIDGE-UPPER
BUCCAL GUTTER TO JUNCTION OF
HARD PALATE.
POSTERIOR MARGIN-UPPER END OF
PTERYGOPALATINE ARCH.
17. PALATINE TONSILS
EACH TONSIL IS AN OVOID
MASS OF LYMPHOID TISSUE
TONSILLAR BED:LATERAL
WALL OF OROPHARYNX
BETWEEN ANTERIOR AND
POSTERIOR PILLARS
ANTERIOR
PILLAR:PALATOGLOSSUS
POSTERIOR
PILLAR:PALATOPHARYNGEUS
18. BASE OF TONGUE
• POSTERIOR ONE THIRD OF THE
TONGUE
BOUNDARIES-
• ANTERIOR: CIRCUMVALLETE PAPILLAE
• POSTERIOR: EPIGLOTTIS
• INFERIOR: EPIGLOTTIS AND HYOID
• SUPERIOR: SOFT PALATE
• LATERAL: GLOSSOPHARYNGEAL SULCI
• VALLECULAE:1cm mucosal strip which
serves as transition between base of
tongue and epiglottis
• Part of base of tongue.
24. FLOOR OF MOUTH
SUPERFICIAL AND DEEP LYMPHATIC DRAINAGE SYSTEMS:
SUPERFICIAL DEEP
CROSSES MIDLINE
I/L AND C/L SUBMANDIBULAR LN
PENETRATE PERIOSTEUM
SUBMANDIBULAR AND
UPPER JUGULAR LN