Orbital# intro
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Transcript of Orbital# intro
![Page 1: Orbital# intro](https://reader034.fdocuments.net/reader034/viewer/2022052602/559f2a711a28ab0d378b46e4/html5/thumbnails/1.jpg)
ORBITAL FRACTURES
Dr V.RAMKUMARCONSULTANT DENTAL&FACIOMAXILLARY
SURGEONREGNO: 4118 –TAMILNADU-INDIA-(ASIA)
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INTRODUCTION
Orbit is a pyramidal cavity on each side of the nose.
The average adult orbital volume is 30 cc
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SUPERIOR ORBITAL FISSURE
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Anatomy of the bony orbit
The bones which forms the orbit consist of
Maxilla
Zygoma
Lacrimal sphenoid
Ethmoid
Palatine bone
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Parts of the orbit
Roof
Medial wall
Lateral wall
Floor (relatively thin)
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Contents of the orbit
Eye ball
Fascia (orbital bulbar)
Muscles( etraocular involuntary)
Vessels(opthalmic)
Nerves(2,3,5,7)
Lacrimal gland
Orbital fat
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Classification of orbital fractures
pure blow out #
# of the floor of the orbit without the involvement of orbital rim
Impure blow out #
# of the orbital rim
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Movement of eye ball - Muscle
upward rotation - superior rectus or elevation inferior obliqueDownward rotation - superior oblique or depression inferior rectusMedial rotation - medial superior, Or adduction inferior rectus Lateral rotation - lateral rectus, or abduction superior, inferior oblique
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Intortion - superior obliqe
superior rectus
Extortion - Inferior oblique
inferior rectus
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Movement of the eye ball
Transverse axisUpward rotation - Elevation 33`Downward rotation- Depression 33`
vertical axis Medial rotation- Adduction 55` lateral rotation – Abduction 55`
AP Axis Intortion Extortion
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ACTION OF EXTRAOCULAR MUSCLE
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CLINICAL SIGNS AND SYMPTOMS OF ORBITAL #
INCREASE INTERCANTHAL DISTANCE
SUB CONJUNCTIVAL ECHHYMOSIS
OEDEMA
HANGING DROP APPERANCE OF FAT
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INVESTIGATIONS
PNS VIEW
SKULL PA VIEW
WATERS VIEW
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complications of orbital fractures
paralysis of muscle
Diplopia
Nystagmus
Retrobulbar hemmorhage
Cavernous sinus thrombosis
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