Infectia Oaselor Maxilare
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INFECTIA OASELOR MAXILARE
2013
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OSTEITA = proces infectios localizat in corticala osoasa
OSTEOMIELITA= proces infectios ce cuprinde osul in totalitate
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Osteomielita nespecifica50% din totalul infectiilor osoaseMandibula > maxilar; 5:1Etiologie:
Stafilococ aureu, stafilococ alb (90%) Streptococ hemolitic Pneumococ
In osteomielitele de origine dentara - flora din cavitatea bucala
• Streptococi, stafilococi, enterococi, fusospirili, anaerobi (clostridium perfringens)
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Osteomielita nespecificaFactori favorizanti
Parodontita apicala Parodontite marginale Focare septice de vecinatate: fose nazale,
sinusuri maxilare traumatisme
Propagarea infectiei Direct, din vecinatate Pe cale hematogena
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Anatomo-patologicFaza congestiva
Hiperemie, vasodilatatie, focare hemoragice Edem inflamator medular si subperiostal
Faza supurativa Transformare purulenta a focarelor hemoragice,
micoabcese, tromboze capilare septice
Faza de necroza osoasa Sechestre osoase (necroze osoase) inconjurarte de os
demineralizat fistule
Faza reparatorie Osteogeneza si reactie periostala
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Osteita
Procese inflamatorii localizate la corticala si compacta
Radiologic: demineralizarea osului, osteoliza, cu sau fara sechestre
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Forme clinice de osteitaOsteita periapicala:demineralizare periapicala,
contur difuzOsteita corticala: demineralizarea tabliei osoase,
aspect de os “muscat”, (carie), sechestre lameliforme
Osteite alveolare (alveolite, osteite marginale): dispare lamina dura, stergerea marginilor alveolei, contur anfractuos, aparitia unei zone de radiotransparenta cu tendinta la extindere
Periostita acuta: dupa flegmoane, abcese, forma acuta fara semne radiologice, cand are tendinta la cronicizare: ingrosare periferica radioopaca de
intensitate mai redusa ca a corticalei
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Forme clinice
OM acutaOM cronica
Copii VarstniciImunodeprimati
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Oseteomielita acuta
Clinic: Debut brusc Semne generale: febra, SGA, Semne locale: tumefiere, congestie, durere,
fistule, adenopatie locoregionala, hipoestezii, anestezii (Vincent)
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radiologic
6-8 zile – osteoporoza difuza2s – osteoliza difuza, alternanta de zone
radiotransparente si opace: “os patat” “miez de paine”
4-6s – sechestre osoase2L regenerare osoasa, osteoscleroza
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Osteomielita cronica
HiperostozantaIngrosare difuza cortico-periostalaSechestreFistule tegumentare si mucoaseEvolutie indelungata 1-2 ani
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Osteomielite cu aspect radiologic schimbat
Fara sechestre – zone lacunare de distructie osoasaForma cu sechestratie: sechestrul nu se elimina ci
se integreaza in os si umple zona de radiotransparenta
Forma condensanta – zonele de radiotransparenta se mineralizeaza, apar opacitati imprecis conturate
Forma pseudotumorala: - ingrosare progresiva a osului, aspect “patat”, corticala subtiata isi pastreaza continuitatea, dg# cu sarcomul osteogenic
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Osteoradionecroza
Etiopatogenie: Factori termici: electrocauterizarea Factori chimici: arsen Factori ionizanti: iradierea
Doza de iradiere: 4000-5000R
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Aspect radiologic
Daca dintii sunt prezenti pe arcada: aspect de osteita alveolara cu tendinta la extensie la restul osului
Initial: osteoporoza +/- reactie periostala In evolutie:
zone de demineralizare, osteoliza slab conturata, sechestre osoase
Complicatii: fracturi
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ENDOSTOZA/SECHESTRE OSOASE
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Abces submandibular
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Abces submandibular
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Abces submandibular
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Abces submandibular
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Abces submandibular
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Osteomielita garre
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Osteomielita Garre
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Osteomielita nespecifica
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Osteomielita nespecifica
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Osteomileita nespecifica
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osteomielita
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osteomileita
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osteomileita
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osteomielita
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. OSTEONECROZA
ASEPTICA SEPTICA:
SECHESTRU
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osteoradionecroza
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osteoradionecroza
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osteoradionecroza
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osteoradionecroza