JOURNAL OF BIOMEDICALSCIENCES AND THERAPEUTICS

The Official Journal of the Society of Biomedical

Sciences and Therapeutics.

(Egypt)

The Official Journal of the Society of BiomedicalSciences and Therapeutics, Cairo - Egypt

Abbas El-MaraghyAbdala Gomaa RadwanAbdalla KhalilAbdel-Baset El-AasserAbdel-Karim El-HemalyAbdel-Rehim GhazalAdel Kher El-DinAhmed El-HawiAhmed Fathy El-ZayatAhmed ShawkyEmad NaraaEzz El-Din SharafFarouk El-SamanoudiFarouk Gamal El-DinHamad Mahmoud HamadHassan Nashnat Alam'Heder GhalebKamal Zaki KoderaMahmoud Abo-El-MakaremMahmoud KhyyalMahmoud Taher El-MougiMomamed Abdel-Mounem Abo-El-FadelMohamed El-Dakhakhny

Mohamed Esmat MahmoudMohamed Mohy El-Din AttAMohamed Moustafa El-SayedMohamed Noor El-DinMohamed Rashad HegaziMohamed Salah Abdel-RehimMohamed Salah El-DinMohamed SharawyMohamed Taky El-Din KhyyalMoustafa El-Sayed El-SayedNabila Abdel-FatahNabil YounesRagaa Abdel WahabSaadia Abdel-HafizSalah HamzaSalem NegmSamia Abdel WahabSamir Fahmy SaadSamira SalehSayed AmarUsama El-TayebZeinab Helmy Hussein

LIGHT AND SCANNING ELECTRON MICROSCOPIC STUDYOF BACTERIA INVADING THE SOFT TISSUE WALL OF THE

POCKET IN RAPIDLY PROGRESSIVE PREIODONTITIS

Mona Y. Abd EI-Razzak, Ebtessam A. Elzefzafand Ahmed A. Abd-AI-Aziz

Department of Oral Medicine, Periodontolo~y Oral Dia~nosisand Dept. of Microbiology

Facul ty of Dentistry and Pharmacy, Tanta University

ABSTRACT: The presence of bacteria within the soft tIssue wallof deep peridontal pocket in rapidly progressive perIOdontItis (RPP)was studied by light and scanning electron mICroscope (SEM). Fivegingival specimens from five different patients and other threespecimens from three periodontally heal thy persons were thesubjects of this study. DIfferent morphological forms of bacteriawere noted throughout the pocket wall of the diseased spec /Illensby light and SEM. The majority of bacteria were cocci, coccobacilliwith some rods and some splrocheats. Mycoplasma like organlSITlSalso appeared. Wide Intercellular spaces with areas of haelTlorrhagewere noticed as well as ulceration of the pocket wall with collectionof bacteria around the ulcer. It could be concluded that bacterialpenetration into the epithell urn and connective tissue In casesof RPP may cause rapJd and severe tIssue destruction and theInvading bacteria may reside within the tissue after scaling androot planing and even after flap operation which may play a roleIn recurrence 01 this disease. ThIS In turn strengthen the needfor systemically admwllst<:>red agents as an adjun( t to local treat-rnent of R P P.

The role of bacterial plaque In the etiology of Inflammatoryperiodontal diseases IS well established (J). It has been suggestedthat, the microorganisms do not invade the periodontal tissuesand the Inflammatory reaction is provoked by bacterldl prpductsdiffUSIng throllgh the epithellurrl into the connective tissue (2, 3).

Bacterial invaSion of the perldontal tissues and its possibledirect Involvement In tissue breakdown remaIn a controverSialsubject. Many studws h3ve shown bac terla within the pockC't softtissues and hdVe relaled their presence with tissue breakdown andeven With alvE'olar bone' resorption (4-7) ..

ReceivedAccepted

Jdr1. 1993March 1993