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1、牙冠延长术保存残根的临床疗效观察作者:郑志强,骆凯,赵伟,陈素凤,林彬单位:福建医科大学附属口腔医院,福州3500021.牙周科;2.修复科福建省自然科学基金(2006J0112)【摘要】目的观察牙冠延长术対牙体缺损达龈下的残根修复的临床疗效,探讨牙冠延长术的适应症。方法对29颗缺损达龈下3mm的残根行牙冠延长术,根据牙根长度分为A组(13颗患牙,根长≥1.5cm)和B组(16颗患牙,1.2cm≤根长<1.5cm),于术后6周常规修复。比较术前、术后6周、修复后1月及3月的牙周探诊深度(PD)、龈沟出血指数(
2、SBI)和牙松动度(MD),以评价临床疗效。结果29颗患牙术后牙周状况良好,总有效率为86.21%o术后各时间点PD、SBI均明显优于术前(P<0.05),但两组术后牙周指数比钱差别无统计学意义(P>0.05)oA纽术片无松动,B组术后56.25%出现I度松动。结论牙冠延长术有利于残根的保存利修复,但要注意适应症的选择。【关键词】才冠延长术;根管疗法;才髄疾病;义齿修复术;生物学EvaluationoftheClinicalEffectofCrownLengtheningSurgeryonResidualRo
3、otZHENGZhiqiangl,LUOKai2,ZHAOWei1,CHENSufengl,LINBin21.DepartmentofProsthodontics;2.DepartmentofPeriodontology,TheAffiliatedStomatologyHospital,FujianMedicalUniversity,Fuzhou350002,ChinaABSTRACT:ObjectiveToevaluatetheclinicaleffectofcrownlengtheningsurgeryonresid
4、ualrootwithsubgingivallyinvolveddefect.Methods29residualrootswithsubgingivallyinvolveddetectwithin3mmweredividedintotwogroups:groupA(13teeth,toothroot≥1.5cm),groupB(I6teeth,1.2cm≤toothroot<1.5cm).Allteethweretreatedbythecrownlengtheningfirstandrestored6week
5、saftersurgery・Theparametersofprobingdepth(PD),sulcusbleedingindex(SBI)andtoothmobilitydegree(MD)werereviewedandanalyzedbeforesurgery,6weeksaftersurgery,1and3monthsafterrestoration.ResultsPeriodontalconditionsoftheteethwerewellandtheoveralleffectiveratewas86.21%・P
6、ostoperativePDandSBIwerebetterthanthosepreoperatively(P<0.05)・Buttherewerenotdifferencesamongthetwogroups(P>0.05).ThereweremoreteethshowingincreasedmobilityingroupAthaningroupBaftersurgery.ConclusionsCrownlengtheningsurgeryhasgoodclinicaleffectfortheprotect
7、ionandrestorationofresidualroot,buttheindicationmustbeselectedproperly.KEYWORDS:corwnlengthening;rootcanaltherapy;dentalpulpdiseases;prosthodontics;biology修复牙体缺损达龈下的残根残冠是较困难的,当前国内外普遍采用牙冠延长术(crownlengtheningsurgery)处理,它是根据生物学宽度(biologicwidth,BW)原理,主要用于暴縮外伤劈裂牙或残根的龈
8、卜断端,或改善过短牙冠现象、專龈微笑等不美观的现象,在临床上nJ捉高患牙的保存率[1]。笔者采用该方法对29例患牙进行修复前治疗,并定期进行追踪观察,分析影响手术成功的因素,为该方法的临床推广及适应症的选择积累经验。1资料与方法1」一-般资料选择因各种原因引起的牙缺损达龈下3mm内的残根29颗,男性12例,女性17例