口腔診斷學

陳玉昆助理教授 : 高雄醫學大學 口腔病理科 07-3121101~2755 yukkwa@kmu.edu.tw

Anatomic Radiopacities of the Jawbones

顎骨之 X 光不透過解剖影像

Understanding:1. 顎骨之 X 光不透過解剖影像

學 習 目 標學 習 目 標

1. Wood, Goaz. Differential diagnosis of oral lesions. Mosby, 3rd ed., Chapter 24, p. 555-562

2. Eric Whaites. Essentials of dental radiography and radiology, 4th edition, 2007, pp.6, 135, 257, 278, 309, 311-21, 355

3. Tantanapornkul W et al. Correlation of darkening of impacted mandibular third molar root on digital panoramic images with cone beam computed tomography findings Dentomaxillofac 2009;38:11-6

4. http//www.conebeam.com

References:References:

參考資料

Anatomic Radiopacitiesof the Jaws

Ref. 2

Possible causes include:

Normal anatomical structures

Radiopacity

A dental anomalyA bony lesionA soft tissue calcificationA foreign body

Artifactual

Pathological

Anatomic Radiopacitiesof the Jaws (1)

Enamel Dentine Cementum

Lamina dura Periodontal ligament space

Cervical burn outRef. 1

Anatomic Radiopacitiesof the Jaws (1-1)

Ref. 2

Anatomic Radiopacitiesof the Jaws (1-2)

Normal distance fromCEJ to crestal margin: 2-3mm

Ref. 2

Anatomic Radiopacitiesof the Jaws (1-3)

Cervicalburnout

Side viewPlan view

Ref. 2

Anatomic Radiopacitiesof the Jaws (2)

Mandibular canal

Tooth crypt

Ref. 1

Anatomic Radiopacitiesof the Jaws (2-1-1)

Ref. 2

Mesioangular Vertical Distoangular

Horizontal Inverted Transverse

Anatomic Radiopacitiesof the Jaws (2-1-2)

Ref. 2

Anatomic Radiopacitiesof the Jaws (2-2)

Ref. 2

Anatomic Radiopacitiesof the Jaws (2-3)

Pericoronal infection

Ref. 2

Anatomic Radiopacitiesof the Jaws (2-4)

Pericoronal infection

Indentation ofupper marginof inferior canal

Ref. 2

Anatomic Radiopacitiesof the Jaws (2-5)

Radiolucent bandacross the root: achange in direction

Radiolucent bandacross the root:narrowed canal

Ref. 2

Anatomic Radiopacitiesof the Jaws (2-6)

Pericoronal infection

Radiolucentacross root apex

Buccalaspect

Distalaspect

Ref. 2

Anatomic Radiopacitiesof the Jaws (2-6-1)

Ref. 2

Panorex:unerupted left upper canine

Spiral CT (cross section):buccal unerupted left upper canine(2mm slices)

Anatomic Radiopacitiesof the Jaws (2-6-2)

Ref. 2

CBCT:mesiodens

Anatomic Radiopacitiesof the Jaws (2-6-3)

Panorex: mesial root darkening; no root grooving

CBCT: thinning lingual cortex by root & ID

Ref. 3

Anatomic Radiopacitiesof the Jaws (2-6-4)

Panorex: root darkening; no root grooving

CBCT: perforation of lingual cortex by root & ID

Ref. 3

Anatomic Radiopacitiesof the Jaws (2-6-5)

Panorex: without root darkening

CBCT: root grooving

Ref. 3

Anatomic Radiopacitiesof the Jaws (2-6-6)

Panorex: root seems to approximate ID

CBCT: lingual cortex perforation without root approximates ID

Ref. 3

Anatomic Radiopacitiesof the Jaws (2-6-7)

CBCT: lower 3rd molar with root approximates ID Ref. 2

Anatomic Radiopacitiesof the Jaws (2-6-8)

Ref. 2

CBCT: lower 3rd molar with root approximates ID

Anatomic Radiopacitiesof the Jaws (2-6-9)

Impacted 3rd molar

Ref. 5

Anatomic Radiopacitiesof the Jaws (2-6-10)

Impacted 3rd molar

Ref. 5

Anatomic Radiopacitiesof the Jaws (2-6-11)

Impacted molar

Ref. 5

Anatomic Radiopacitiesof the Jaws (2-6-12)

Impacted molar

Ref. 5

Anatomic Radiopacitiesof the Jaws (2-6-13)

Impacted maxillary cuspid

Ref. 5

Anatomic Radiopacitiesof the Jaws (2-6-14)

Impacted maxillary cuspid

Ref. 5

Anatomic Radiopacitiesof the Jaws (2-6-15)

Impacted #22

Impacted #22simulated extraction

Ref. 5

Anatomic Radiopacitiesof the Jaws (2-6-16)

Impacted #22 Ref. 5

Anatomic Radiopacitiesof the Jaws (2-6-17)

Impacted left canine

Ref. 5

Anatomic Radiopacitiesof the Jaws (2-6-18)

Impacted left canine

Ref. 5

Anatomic Radiopacitiesof the Jaws (2-6-19)

Mandibular impacted tooth and nerve localization

Ref. 5

Anatomic Radiopacitiesof the Jaws (2-6-20)

Mandibular impacted tooth and nerve localization

Ref. 5

Anatomic Radiopacitiesof the Jaws (2-7)

Front RightLeft

Principle of parallax: the apparent displacement ofan object due to different positions of the observer

Opposite BuccalSame Lingual SLOB

Object moves in same direction

( 遠方 ) ( 近方 )Ref. 2

Anatomic Radiopacitiesof the Jaws (2-8)

Position 1

Position 2

Position 1

Position 2

Same Lingual( 遠方 -palatal side)

Ref. 2

Anatomic Radiopacitiesof the Jaws (2-9)

PanorexUpper occlusal

Uneruptedmesiodens

Crown portion( 遠方 -palatal side)

Apex portion( 近方 -labial side)

SLOB

Same Lingual

Opposite Buccal

Ref. 2

Anatomic Radiopacitiesof the Jaws (2-10)

Vertex occlusal

Not recommendeddue to high radiationdose

Ref. 2

Anatomic Radiopacitiesof the Jaws (3)

Incisive canal

Anteriornasalspine

Nasalfossa

Incisive canal cystRef. 1

Anatomic Radiopacitiesof the Jaws (4)

Anteriornasal spine

Nasal fossa

Soft tissue shadow of nose Ref. 1

Anatomic Radiopacitiesof the Jaws (5)

Anterior nasal spine

Inferior turbinates

Ref. 1

Anatomic Radiopacitiesof the Jaws (6)

Maxillary sinus Y

Medial wall of sinusmeets the lateral wallof nasal chamber

Ref. 1

Anatomic Radiopacitiesof the Jaws (7)

Maxillary sinus floor- flat

Zygoma

Ref. 1

Anatomic Radiopacitiesof the Jaws (8)

Maxillary sinus floor- scalloped

Ref. 1

Anatomic Radiopacitiesof the Jaws (9)

Zygomaticprocess

ZygomaticboneZygomaticbone

Tuberosity- soft tissue shadow

Ref. 1

Anatomic Radiopacitiesof the Jaws (10)

Hamularprocess

Lateralpterygoidplate

Ref. 1

Anatomic Radiopacitiesof the Jaws (11)

Coronoidporcess

Ref. 1

Anatomic Radiopacitiesof the Jaws (12)

Mylohyoidridge (internaloblique ridge)

Externalobliqueridge

Ref. 1

Anatomic Radiopacitiesof the Jaws (13)

Mentalridge

Ref. 1

Anatomic Radiopacitiesof the Jaws (14)

Lingualforamen-radiopque ring

Genital tubercle-occlusal view

Ref. 1

Anatomic Radiopacitiesof the Jaws (15)

Ala of nose Ala of nose-edentulous jaw

Ref. 1

Anatomic Radiopacitiesof the Jaws (16)

Nasal labialfold

Ref. 1

SummariesSummaries明白顎骨之 X 光不透過

解剖影像。