other bone diseases seminar modiii

8/9/2019 Other Bone Diseases Seminar Modiii

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ORAL RADIOLOGY PRINCIPLES AND INTERPRETATION

STUART C. WHITE & MICHAEL J. PHAROAH

7TH EDITION CH #23

OTHER BONE DISEASES

Done b! Je"n J. G$%2'.'(.2(')


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Other Bone Diseases

This chapter discusses disorders of bonethat don’t easily t into well-denedcategories of diseases.


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Outline

Bone D*+*,* -,b/o0o**eo1* e*,on*D,*e*e e4$n,*,b/o1* D*+*,Periapical Osseous Dysplasia

O5$e/ Le*,on* O6 BoneCentral Giant Cell Granuloa !CGCG"#neurysal Bone Cyst !#BC"Cherubis

Paget’s Disease$angerhans’ Cell %istiocytosis.


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Bone D*+*,

D,*e*e Me4$n,*!

-&oral bone is replaced with brous tissue containingabnoral bone.

-Their treatent di'er fro Tuors.

-(ibro-osseous lesions ) !histopathological ter"coonly used ter that includes) bone dysplasias*neoplass and other lesions of bone.


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,b/o1* D*+*,

Disease Mechanism:-C1*e b 155,on ,n G* +$!G+," genedetected in 839 of brous dysplasia cases-o4,%e change in noral bone etabolis-eplaceent of cancellous bone by brous tissue

containing abnoral bone-Histologically +hort* irregularly shaped trabeculae ofwoen bone that hae rando orientation thisappearance responsible for abnoral internaltrabecular pattern seen in diagnostic iages.

.


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(ibrous Dysplasia Clinical Features: Two types

-Can a'ect ribs* (eur* tibia* a/illa*andible

'0So,5/ -ono*5o5,47(90 ost often a'ect 1aws M:,; Mn,be0#ccidently found in diagnostic iage* in older age group

2015,+e -+oo*5,5,4 3(90 children o1n


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,b/o1* D*+*,

Imaging Features:'0Lo45,on!4-Twice coon in +o*5e/,o/ :,.5-1n,5e/


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,b/o1* D*+*,

ImagingFeatures:20Pe/,+$e/!,ll Dened *gradual blendingof noral boneinto abnoralpattern e/cept inyoung lesionsboundary

considered sharpand corticated.


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,b/o1* D*+*, Imaging Features:

30In5e/n *5/1451/e!Density of trabecular bone pattern ary) a/illa orehoogenous than andible.$esions ay appear O* $ or 3i/ed03a/illa and base of the s8ull) O

09arly lesions ore $ than 3ature lesions and in rare casesay appear ultilocular. !(ig 57-7"


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,b/o1* D*+*,

In5e/n *5/1451/e Con5,n1e!#bnoral trabeculae* shorter* thinner irregularly shapedand ore nuerous than noral trabeclae so the Opattern ary)'0 G/n1/ ++e/n4e -G/o1n0


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:ery en*e o/+$o1*+55e/n inoling e65

:, and preentingeruption of cuspid andbicuspid.

DPanoraic iage with

$oo


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Ao/+$o1* en*e+55e/n occupies ostof 5$e R,


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A. ,n


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A. C/o++e+no/,4 ,


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,b/o1* D*+*, Imaging Features

)0EFe45 on *1//o1n,n< *5/1451/e*!-sall lesion* usually no e'ect.4-9/pansion with aintenance of thinned outer corte/* e/pansion occur alongbone length rather than concentric e/pansion seen in benign tuors.

5-3a/illary sinus)e/pansion by displacing its cortical boundary usually fro lateral wall .

9/tension into sinuses appears as parallel thic8ening of outer cortical borderresulting in residual antral space!appro/. noral anatoic shape of sinus".

7-cortical boundries li8e ) ;oor of antru ay change to abnoral pattern oftenwithout a'ecting dentition also laina dura ay disappear due to this change.

-root resorption ay occur.?-hyperceentosis@-Displace ,DC to superior direction.


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3andibular brous dysplasiadisplace ,DC to superior

direction

Coronal CT- $ateral walle/pansion withantinance of corticalboundries.


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(ibrous Dysplasia

Imaging Features:0 D,Fe/en5, , H+e/+/5$/o,*, 0 +oo*5o5,4 b,5e/ DON?T 41*e bonee:+n*,on>P>O*5eo,5,* " en/ Neo+**0 o/e 4one: e:5en*,on ,n n5/ "-D0 /ee45 5$e o/,


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(ibrous Dysplasia

Imaging Features:0MnNo nee 6o/ b,o+* ,n o*5 4*e* 6o/ ,ee +5,en5! '0$o/on 4$n


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#ny Auestions

Than8 ou

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