牙髓根尖周病ppt培训课件

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1、牙髓根尖周病刘卫国牙髓根尖周病学是研究牙髓及根尖周组织疾病损害及其诊断、治疗技术的一门学科。1930’s前，牙髓根尖周病的结局就是拔牙。牙髓形态及生理学特点牙髓的功能形成功能营养功能感觉功能神经分布感觉功能闸门控制学说牙髓增龄性变化体积变化、结构变化、功能变化牙骨质的增龄性变化根尖周炎与牙髓炎症过程没有别，只是解剖环境不同而已牙髓炎症的疼痛机制组织压升高炎性介质释放恶性循环理论牙髓炎的病因1细菌因素感染途径：牙本质小管牙髓暴露牙周途径牙周途径血源感染引菌作用2物理因素创伤急性创伤、慢性创伤温度备洞产热、

2、充填材料导热、抛光产热电流异种金属修复体、检查治疗激光3化学因素充填材料酸蚀剂、粘结剂消毒药物4免疫因素PULPANDJAWINFECTIONBacteriaarethemostcommoncausesofinflammationandinfectionofthepulp.Theyusuallyenterthepulpthroughtoothdecay(caries).Invadingbacteriafirstoverwhelmthenaturaldefencesinthepulpchamber.The

3、ntheydestroythetissuesintherootcanal(s).Toxins(poisons)fromthebacteriathathavedestroyedthepulpcanleakoutthroughtheapexintothejawbone.Thejawbone,likeallbones,isalivingtissuewhichhasarteries,veins,andnerves.Therefore,itcanbecomeinflamedandinfectedbythepres

4、enceofbacteriaandtheirtoxins.Ifuntreated,infectioninjawbonecanerodethroughthesideoftheboneintothemouth,orevenintothefaceorneck,andcausesudden,serious,andpainfulswelling.INFECTIONOFTHEFACEANDNECK