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1、口腔解剖生理学0103（Oralanatomyandphysiology0103）Thethirdsectionanatomyofmedullarycavityanditsapplication(a)theanatomicalmorphologyofmedullarycavity.1.medullarycavityanatomiclandmarksincentraltooth,atoothshapeandsimilarbutthenarrowingofthecavity,calledmedullarycavity.Thecavityaroundthedenta
2、lpulptissuewasfullofcavitycover.Themedullarycavityattheneckandrootcrowntowardexpandingintoaroomcalledthepulpchamber;oneendofthenarrowtubetowardtherootiscalledtherootcanal,alsoknownasthemedullarycanal.Therootcanalattheendoftheopening,calledtheapicalforamen,theholeforthepulptoperiodon
3、talspacechannel.(1):pulpchamberinthecrownandrootoftheneck,eachtoothiswide,only1pulpchamber.Thepulpchamberconsistsof6sides:towardthesurfaceorcutRidgesaidtheroofofpulpchamber,thepulpchambertothecuspintoahornsectioncalledmedullaryangle;towardtherootsidecalledthepulpfloor;and4facingthec
4、rownshaftsurface,calledthebuccalandlingualpulpwallDongmesiopulpal,pulpandpulpwallinthefarwall.Pulpcavityandrootcanalmigrationknownastherootcanal,rootcanalposteriorteethduetoobviouspulpandrootcanalwithoutobviousboundaries,sotherootcanalisnotsignificant.(2):rootcanalislocatedinthemedu
5、llarycavityoftheelongatedportionwithintherootiscalledtherootcanal.Thenumberofrootandrootcanalrootisofteninconsistent,generallymorefortheround1root,wideflatteethoftenhave2roots,eventhe3rootcanal.(3):apicalintramedullaryvesselsandnervesandlymphvesselstoperiodontalchannel.Locatedinthea
6、picalforamenofmore(57%),(43%),thefewersidetosideofthetonguethemost,followedbyfar,KonnakaKazu,buccal.Therootcanalstenosisintheapicalforamen,butatapproximately1mm.(two)anatomicalcharacteristics,permanentmedullarycavityofage-relatedchangesanditsclinicalsignificanceThemedullarycavitycha
7、racteristicsofmedullarycavityof1.anteriorteethofanteriorteeth:rootcanalforsingletube,pulpandroothavenoclearboundariesbetweenthetubesintheapicalroot(58%).(1)medullarycavityofthemaxillaryanteriorteeth1).Sectionview:spindleshaped,flatcervicalmedullarycavitylabiolingually,fromtheedgetot
8、heneckcutridgedirec
