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1、Unit10PeriodontalDiseaseZengsujuanDentalHospitalofGuangzhouMedicalCollege1Thecharacteristicfeatureofperiodontitisis alossoftheconnectivetissueandalveolarstucture,termedalossofattachment.periodontitis牙周炎theconnectivetissue結(jié)締組織alveolar牙槽的2Gingivalinflammationisacommonconcurrentfeature.Gingivalinflamm
2、ation：牙齦炎concurrentfeature：伴發(fā)癥狀3Thislosswillbeevidencedbyanapicalmigrationofthejunctionalepithelium,whichcanresultinaperiodontalpocket(and/orgingivalrecession)coincideswiththatapicalmigration.evidence：表現(xiàn)apicalmigration：根向遷移thejunctionalepithelium：結(jié)合上皮periondontalpocket：牙周袋coincideswith:與……一致4Gingiv
3、itisisusuallyaprecursor toperiodontitis,butnotallgingivitisprogressestoperiodontitis.Precursor:先兆、前兆5Periodontitisresultsfromahost responsetomicrobialplaque;however, mechanismsforitsinitiationandprogressionarestillbeingstudied.Resultfrom:起因于Host;大量的mechanism：機制initiation6Thetermofperiodontaldisease
4、activityreferstothestageofthediseasecharacterizedbylossofperiodontalattachment.Propose:提議Progression：進(jìn)展periodontalattachment：牙周附著7Itimpliesthatthenaturalhistoryofperiodontaldiseasehasperiodsofactivedestructionandperiodsofrelativeinactivity,althoughchronic inflammationpersists.Destruction:破壞、消滅8Coto
5、n(1989)summarizesthethree theoriesofperiodontaldiseaseactivityas: ①thecontinuousparadigmsthatimplies alow,constantprogressionofperiodontal degenerationsummarizes：總結(jié)paradigm：范例degeneration：退化、惡化Threemodelshavebeenproposedtoexplaintheprogressionofperiodontitis.9②Therandombursttheorythatimpliesthatsho
6、rtperiodsofdestructionarefollowedbyperiodsofnodestruction,occurring randomlydestruction：消滅randomly：隨機地10③Theasynchronousmultiplebursttheorythatimpliesthatperiodontaldiseaseactivity,andresultantdestructionoccurswithinaspecificperiodoflifeandisfollowedbyremission.asynchronous：不同時存在性，異步的resultant：必然產(chǎn)生
7、的remission：減輕、平息11Loeandcoworker(1986)assertthattherateofprogressvariesindifferentsites, atdifferentages,andbetweenindividualsandgroups.12Theperiodontitislesionprogressessteadilyovertime,eventhoughtheremayb
