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根管治疗后冠部修复

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  • F面是讲座的题目及时间Restoration of theEndodontically TreatedToothEric M. RiveraMilton Friedman AuditoriumUriversidad Francisco MarroquinGuatemala. August 6( 2009下面是部分讲座内容的截屏及翻译,译文仅供参考,建议大家看英文内容 根管治疗后,当一个牙齿组织缺失并失去牙髓活力后,标准的处理是桩核修复Aecons-triKiar忖 Brokan Down and En dExtonti caHy Tr«aled Teeth■STANDARD OFCAREI fiTp桩核:根管治疗后的牙齿经常因为龋坏、根管治疗或者先前的修复体导致牙齿缺失相当 部分牙体组织AeEMinslrLKiinig Broken! Cown and Endodonb caily Tre&ted TeethPOST AND CORE缺失的牙体组织还导致修复体的固位出问题,并增加了牙齿折断的风险Ftec^hsinuctifljg Brokwi Down a«vd Endc3o亞亡*乌 Trewtrf Twih6wnrikv« ” «H-Jl■I LOSS OF TOOTHSTRUCTURE牙本质肩领:充分的牙本质肩领对成功的核固位的修复体是必需的; 肩领效应是一个环绕的360度的平行的牙本质肩领并伸展到冠方牙体预备肩台的 1.5-2mm形成的。

    肩领的宽度跟长度对预防牙根折裂同样重要' An adc^u^tc fciruli: is ncce^ary 1« a suctodiil poat-jvtained restuFiJitipn,• A ferrule clYttt is a cellar uf 560" suiroundinA.pdralld vinlb ofdr宿ir andcxEcndin^ 1.5 mm 2.0 nimco^da! u?rhc finishline oF the preparation.* F^frulv 1丸】淨h has a留r野ucr i於山亡雅金殆口 the斤目灯时c牌衬京二 ot 在 root resiorcd with a post than the pose length.• Ferrule width is just as impafiant as ferrule length on the fra

    不知大家有没有或者见没见过铸造桩核烤瓷冠因咬合力量过大导致牙体纵折的案例?这里的教科书建议, 如果没有足够的牙体组织做肩领, 就必须做冠延长冠的边缘必须粘结在牙体组织上, 而不是修复材料上欧洲2006根管学会指导标准根管治疗后效果欠佳的几种情况:@牙齿有感染的症状及表现 @根管治疗后根尖随后出现 X光可见的病变或者先前的病变尺寸增加@病变尺寸不变或者仅仅在 4年的随访中才消失@存在牙根持续吸收的状况European Society of EndodontologyGuidelines 2006* Root 匚anal Treaimeat has art unfavouratile qutcome when■于出芒tXt卜治古対出:临址制wrth sigrii Ahd ^yrtiptCrths df infect ram• A tntirolOii»llv vhi feds* I斛i(m iidl 如曲彷悶帘Mb紬 quent io treatment ar a pre-existing l^iori lias incre-as^d ih size.• A lesion ha& rerrlined iht same^ze crhasi only diminished in sizeduringth-e4-yoaf -a*»ess-m»b list of rubber dim-m jrm vi r«ary m 5; ry men 1■ 0i?infecricn wih sotii*m hypMhlori忖 O.SSi-S.25%-WdliMi; amd Qbiuradcri■ YirriulTiple viiit NO 4s.rtr^itSi1T d fltftrif<■ ih 5 CochraneMfiiematK r电Mt-FlgiM 哄抽 J ETdodontJODi*倆悄唧 咨 聊rt 1^1 cflnd & rtRrt呻n* CofChdl J.eal 13 Egt irr»uur2卅 Jt(£i.pN unte"ods it ud:r>, wch 昭 icmi nci cl eF;) tndodcMil 2002Us冠方封闭的重要性Ray及Trope1995年的对1010颗根管治疗的牙齿的研究表明,冠方修复体的质量比根管 治疗对根尖的健康更重要;研究包括没有桩核固位的直接修复体。

    ResJaraton ef ma EfioadMbeally TfubNS Tacffih - Modem hMtnalA韵丽字#*卜歯* af Vbr卜時dj・>4翼1|*-gH JbM th 9 'Bi ■,舄8 K1 \ ・二 £ ;・Importance of coronal seal■ ft a/ and Trope 1995一 1010 endodontically treated teelh.-匚onctus^on quality of ooronai restoraiion mor? fmpcrtant ^anenti&elcntrc treatment tar p^ri^pital h电Rih-Induced rto post retained jestoratrons根管治疗后的因素44613颗牙齿2年及以上随访表明,直接充填修复的牙齿有 6.28%被拔除,而做过牙冠修复的牙齿有2.54%被拔除ReKwawn 出才曹 EncQCg&e曲y T&rfn - F.^odiMn htmatsiFactors affecting endodontic success• Post endodontic factors-Intra-cororal 乃 cuspa^ ccverag-e restoration-Lazarski et al: i Endodont 200L 44613 teeth followd tor 2 years cr rnore. 6.28% extracted after direct placement re ration vs 2.54 ?& forcrowned teeth桩核固位的修复体测试了铸造桩核,成品桩,铝的临时桩及预制的临时冠, 显示临时修复的周围有很明显的微渗漏,因此作者建议用预制桩在根管治疗后做即刻修复。

    RfrsisaTiMion a? Sw ^nwdonbeaRy treaflftd Tocth ■ i.-IMem Lta-reOa^Post retained restorations' Fox and Gutteridge 1997・ rentedCast po?-t and cores-PreMbricated posu— tcmpo^jry posts ?ri(l prrfHbriGtcd tcffiixjrtiycrowns・ S gnihc^ntly rrior^hakmg电 around t@mpcrari@^・ AMthors advised immediate restoration kvithpfeFa breated post失败的原因@根管治疗的不完全充填@不良的冠边缘密合性@高的龋坏发生率@纵折@根管的过度预备@咬合应力@被削弱的冠方牙体组织@侧穿 @根吸收 @侵占生物学宽度 一修复体边缘与牙槽嵴间要最少 2mm距离af X 陀 ally Tf毋血 Taeth » LIMem KAaEt--^Reas on fo「failure• incomplete obturation of root canal• Poorly fitting crown margins• High caries riskVl\^M.coytReMOfdgn g(6Q Er2QO©ntKolty Tre®:« 丁hWzFwReasons for failure• Vertical tooth fracture• Over-preparation of canals• Occlusal stresses• Weakened coronal tooth tissuePtwsSQrartffiei -oFlT-B TrwCKS Tooff-- -Reasons for failure■ Root resorption矗BsPniMKi of 3isfl EgoOonW卑 Tne曰激 ToWi - Modem ■母Reasons for failure■ Invasion ofbiological width• At least 2mtndistancebet vueeAr^stijrativ^mdrgii^ 白ndalveolar ridg-e修复体不同类型的平均寿命完全覆盖的冠修复一25年传统烤瓷桥一20年桩核冠一13年,多数因为根折失败Reasons for failure• (Sood et al 1995. R«view of treatment atEastman Dental Institute by staff* Average I ife span for tvp^s of restararion-Full coverage crown - 25 v^ars-Conventional bridge- 20 years—Po$t crown・ y,旧0«rnmn¥ dtip to root f i.ifture^—T^fCTvy dwb TBIT^ V^ang根折原因@预备过的牙齿抗力减弱 @根管预备一揭髓室顶及根部牙本质的预备& EM- Holly Ff嶺—d Tð ■ Madorri klabt-fiai^Reasons for root fracture-Prepared teeth are weakened 一 Cavity preparations-Marginal ridges-Undermined Cusps-亡U5R ftexion• Fndnricintic propsrATinn-Putpal roof-!> ilrd-fddrLuldr dtriLiTiu去除旧的修复体:根管治疗前所有的修复体都应该去除。

    因为有可能有继发龋、 裂纹、或者修复材料折裂,这些都需要去除冠后再重新评估在加拿大有很多牙医为了给患者省去重新做冠的钱, 或者应患者要求,直接从冠方穿过冠修复体做根管治疗, 之后再用树脂充填, 这就有可能导致有裂纹的牙齿因看不到折裂线,随后发展为纵折本来应该拔除的牙齿再次根管治疗, 失败是早晚的事情了;还有如果先前的牙齿近中或者远中或者颊舌向倾斜, 不去除牙冠很容易造成某些部位过多切割牙体 想必国内有很多牙齿也是直接穿过牙冠后做根管治疗, 提醒大家一定要多多注意纵折的风险的如果冠本来做得就不理想,还是拆了重做一个为好Remove old restorations• All restorations should be removed prior to endodontic treatmentIW AU*宝诗咬合:是根折的最可能的主要原因修复的关键是要建立组牙功能合,用 Shimstock咬合纸在最大牙尖交错位测试,侧方合要形成尖牙保护合,前伸合时前牙要有合引导OcclusionMost likely 10 be primarv cause of rootfracture Ertfod^rilfcatiy TnptfM TkjCi _ 岬占be 祖1;1 仙pMflHfJ x」尸7 =巾』Occlusion• M-ost Ifikety to be primary cause of rant fracture• Aim for mutualty protected occlusion.• Hold Shimstock on rndjonty of teeth, at nidxifBum inlercuipdliDn• Canine guidan匚e immediately on lateral excursion■ Guidance on anterior teeth on protrusive movement最后的修复方案@冠内修复体一银汞合金或复合树脂@牙尖覆盖式修复体一全冠或者高嵌体@覆盖义齿的基牙ReKsrati&fl Df x 总鈕&WJ亡显Jy TreaM TMih - Modftfn Ma Inna la 亠li MR I* I ■< 'Definitive Restorative Options* Intra-coronal restoration-Zkirtalgam-Composite resin•匚iBpdl coverage restoration-Crown-Onia/• Overdenture aubutment根管治疗的成功率(调查了 1200颗牙齿)%冠修复无冠修复总计94.875.8上颌前牙87.585.4上颌前磨牙93.956上颌磨牙97.850下颌前牙97.594.4下颌前磨牙93.862.5下颌磨牙96.857.7RjwtwHm

    患者定做的桩,密合性好,能协助形成箍效应,但花费高;成品 桩,可即刻封闭缺损,但技术要求高@主动就位或被动就位,主动就位的核会增加根部牙体组织的应力, 被动就位的核需要粘结@平行桩或锥形桩,实验室研究表明平行桩会增加固位力,锥形桩跟牙根形态一致Post Choices• Custom-made or prefabricated• Active or passive• P^raHel ar tapered• M^Tprial compositionH.0- 4 • jp-i.il [uKLi *口 be rcLixfirdlR科如TlKfi 6罚呻 ■: 4ll y 7rw?rt¥Cl - -??orate ferrule 亠 Expen&e• Prefabricated-irtflr^ediau^i of cavity-Technique 誨nsititf电ReHxeos of Ge Enoodonbcalfy Treated Tooth - Modem hZecaHUlG快6・ AM ■■■• Active一 Increased stress on root structuref.C(WVIV/V WJL•WtfMirr*Restoration of the Enocoonoc^ny Trwned Tooth ・ Mooem F.tatenafcs• Passive-Requires bondingftestootte U*v«o

    下图可以看到牙本质肩领Ara&rBTSon of Uw 亘na匚Tcx«n - p-.iccSEm. bl■鶴昇击答这是我们大家最熟悉的一类纤维桩核树脂全冠修复Reconstructing Broken Down and Endodoptically Treated TeethVIWVLSqNZG-Wtfe ZXftecx>nstructing Broken Down and Endodontically Treated TeethFtccflnslrycting 商曲潭 Down imd Trwl»d T*etnPRE卩当然并不是所有的牙齿都需要桩的, 核修复就可以,当然是要冠修复啦核修复我们前面已经讲过nsIrucEl ng Broken Down and En

    这是本人得到的临床指导,跟大家分享,大家如果感兴趣,可以进一步研究Cercon ht Full ContouZirconia allows for consrvative tooth preparationCtossk preparatfon forall-ceramic crownsConservative preparation for full contour crownscfqvhI 1-4, CMiHfvarhr* hi 14 KonidUrir^Dribgfi,Classit preparation for^11 ceramic bridgesCon^prv^tivp prpprirafi^n fnr Full rnntnijr biiclRF%■ BillIJkt J; ■■Crrtofl bL briE*e Kb加卜 CtHMrvutiw pr曹庁 ctntour poU・n«F bri4fe.C(ftn«htfcri4iwl3 fOEPGi V J4 IhifM hui舸氈。

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