病理学矽肺肺心病ppt课件.ppt

Pathology and Medical Management TMJ Disorders and Diseases
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this is for your information only,
it won’t be used for the exam
important to know for exam
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Temporomandibular Joint Imaging
Radiography:
Fractures which might occur.
Can also get an idea of the joint position
Generally not as useful as other types of imaging studies
Standard Views:
Transcranial View
Submentovertex view
Cephalometry: lateral views
MRI: T1-weighted sagittal images are the method of choice for TMJ examination.
Articular disk position
T2 weighted images
Periarticular changes
Joint effusions
CT
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Figure 5.  a, Sagittal and b, coronal MR images (770/27) of a normal TMJ with jaw in closed position.
Sommer O J et al. Radiographics 2003;23:e14-e14
©2003 by Radiological Society of North America
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TMJ Dysfunctions
Non-Inflammatory
Inflammatory
MPDS
Articular
Non Articular
Articular Disk
Displacement
With Reduction
Deviation in Form
Dislocation and
Subluxation
Fibrosis
Without
Reduction
Ankylosis
Bony
Synovitis and
Capsulitis
Arthritic Disorders
Osteoarthritis
Rheumatoid
Arthritis
Other
Myositis
Spasm
Muscle
Contracture
talsem/
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Articular Disk Displacements with Reduction
Partial Anteromedial Disk Displacement
Disk slides anterior on the condyle
Posterior band is more anteriorly placed than normal
Etiology:
Thinning of the posterior band
Minimal elongation of diskal ligaments
TX: intro-oral appliances bination with stress reduction
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Disk Displacement
Anteromedial Disk Displacement with Reduction
Definition: Change in the disk-condyle structural relation during mandibular translation with mouth opening and closing
Etiology:
Articular surface irregularity
Disk-articular surface adherence
Synovial fluid degradation
Myofascial imbalances around the joint
Increased elongation of diskal ligaments and posterior attachment

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5 Progressive Stages
Stage I Disk Displacement
Temporal mandi