資源描述:
《牙周病學(xué)醫(yī)學(xué)英語》由會員上傳分享,免費在線閱讀,更多相關(guān)內(nèi)容在教育資源-天天文庫。
1、Unit10PeriodontalDiseaseZengsujuanDentalHospitalofGuangzhouMedicalCollege1Thecharacteristicfeatureofperiodontitisisalossoftheconnectivetissueandalveolarstucture,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、itisisusuallyaprecursortoperiodontitis,butnotallgingivitisprogressestoperiodontitis.Precursor:先兆、前兆5Periodontitisresultsfromahostresponsetomicrobialplaque;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,althoughchronicinflammationpersists.Destruction:破壞、消滅8Coto
5、n(1989)summarizesthethreetheoriesofperiodontaldiseaseactivityas:①thecontinuousparadigmsthatimpliesalow,constantprogressionofperiodontaldegenerationsummarizes:總結(jié)paradigm:范例degeneration:退化、惡化Threemodelshavebeenproposedtoexplaintheprogressionofperiodontitis.9②Therandombursttheorythatimpliesthatsho
6、rtperiodsofdestructionarefollowedbyperiodsofnodestruction,occurringrandomlydestruction: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