Rarefying ostistis ppt

I.A.AYISHA TALAT
BDS
FINAL YEAR SEM2

1. PERIAPICALINFLAMMATORYLESION
periapicalrarefyingosteitis
GOODMORNING
I.A.AYISHATALAT

2. DEFINATION
••a•• local•••••• response••••••••• of••• the•••• bone••••• around••••••• the•••• apex••••• of••• tooth•••••• that••••• occurs••••••• as••• a•• result••••••• of•••
necrosis
•••••••••
of
•••
pulp
•••••
or
•••
through
••••••••
destruction
••••••••••••
of
•••
periapical
•••••••••••
tissue
•••••••
by
•••
extensive
••••••••••
periodontal
••••••••••••
disease.
•••••••
•••also••••• called••••••• acute•••••• apical••••••• periodontitis•••••••••••••• ,•• chronic•••••••• apical••••••• periodontitis•••••••••••••• ,•• periapical•••••••••••
abscess
••••••••
and
••••
periapical
•••••••••••
granuloma.
•••••••••

3. DISEASEMECHANISMS

4. CLINICALFEATURES
rangesfrombeingasymptomaticto
occasionaltoothachetoseverepain
withorwithoutfacialswelling,fever
andlymphadenopathy.
periapicalabscessmanifestswith
severepain,mobility,elevationof
involvedtoothandpainon
percussion.
spontaneousdrainageofabscess
intotheoralcavitythrough
fistula(parulis)relieveacutepain.

5. IMAGININGFEATURES
dependsonthetimecourseofthelesions.
earlylesionmaynotshowanychangesand
diagnosisisbasedoninclinicalexamination.
chroniclesionsshowlytic(radiolucent)or
sclerotic(radiopaque)changesorboth.
LOCATION:apexoftheinvolvedtooth.starts
withintheapicalportionofthepdlspace.
PERIPHERY:mostlyilldefinedshowingagradual
transitionfromnormaltrabecularbonepatternto
abnormalbonepattern.rarelyshowswelldefined
corticalboundaries.

6. RAREFYINGOSTEITIS(Internalstructure)
Inflammationofbone(osteitis)resultingin
resorptionofbone(rarefaction).
Thetermisnotadiagnosisbutisaradiographic
interpretationthatincludesperiapicalcyst,
abscessandgranuloma.
earlylesionshowsnochangesinbonepatternbut
usuallyresultsinwideningofPDLspace.
chroniclesionsshowsrarefaction(lossofbone
givingradiolucentappearance)
hencewhenlesionisundergoingboneresorption,
thetermperiapicalrarefyingosteitisisused

7. RADIOGRAPHS
reference:http://drgstoothpix.com/radiographic-interpretation/pulpalapical-findings/apical
-findings-inflammatory/rarefying-osteitis/

8. Reference:oralradiologyandinterpretationprinciplesandinterpretation(first
southAsianedition)