全冠牙预备体表面涂布极固宁TM后对其固位力的影响

《全冠牙预备体表面涂布极固宁TM后对其固位力的影响》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、国际口腔医学杂志第35卷第1期2008年1月InternationalJournalofStomatologyVol.35No.1Jan.2008·1·论著全冠牙预备体表面涂布极固宁TM后对其固位力的影响郑明,程辉,陈文多,马守治,郑志强,胡志刚(福建医科大学附属口腔医院口腔修复科福建福州350002)TM[摘要]目的探讨涂布极固宁后对全冠固位力的影响。方法制作面聚合度（TOC）为10°和20°的全冠牙预备体各10个，随机分为实验组和对照组。每组TOC10°和20°的全冠牙预备体各5个。制作铸造全冠20个。TM实验组涂布极固宁后玻璃离子黏固剂黏固全冠，

2、对照组直接玻璃离子黏固剂黏固全冠。材料实验机上测两组全冠拉脱时的最大拉力值。扫描电镜观察表面并能谱仪分析。结果TOC为10°的实验组全冠和对照组全冠拉脱时的最大拉力值分别为（443.59±74.20）N和（509.07±69.05）N，两组间的差异无统计学意义（P=0.056）；TOC为20°时实验组和对照组全冠拉脱时最大拉力值分别为（291.57±49.27）N和（390.82±91.44）N，两组间的差异有统计TM学意义（P=0.009）。结论TOC为10°的牙预备体表面经极固宁处理后对玻璃离子黏固剂黏固的全冠的固位力TM没有影响；而TOC为20°

3、时牙预备体表面经极固宁处理后的固位力显著下降。TM[关键词]极固宁；全冠；牙预备体；固位力[中图分类号]R783.1[文献标识码]ATMEffectofGreenOronthecrownretentionusingstandardizedtoothpreparationZHENGMing,CHENGHui,CHENWen-duo，MAShou-zhi,ZHENGZhi-qiang,HUZhi-gang.（Dept.ofProsthodontics,HospitalofStoma-tology,FujianMedicalUniversity,Fuzhou

4、350002,China）TM[Abstract]ObjectiveToevaluatetheeffectofGreenOronthecrownretentionusingstandardizedtoothpreparation.MethodsFortyrecentlyextractedmolarswerepreparedbylathe.Totaloclussalconvergence（TOC）angleofhalfofthemolarswere10°andtheotherswere20°.Thecastcrownsweremadeandthesamp

5、leswith-TMineachdegreewererandomlydividedintotwogroups.Intheexperimentalgroup，GreenOrwasappliedtothesamplesbeforethecastcrowncementedwithglassionomer.Inthecontrolgroup，thesampleswereonlycement-edwithglassionomer.Thesampleswerestoredin37℃artificialsalivafor24hbeforetensiletesting

6、onanin-strontestingmachineatacrossheadspeedof1mm/minuntilfailure.Thesurfaceofthespecimenwasobservedbymeansofanopticalandascanningelectronmicroscope.ResultsWhenTOCanglewas10°，theretentionpowerofthetestingforcewas（443.59±74.20）Noftheexperimentalgroupand（509.07±69.05）Nofthecontrolg

7、rouprespectively.Therewasnostatisticallysignificantdifferencebetweenthetwogroups（P=0.056）.WhenTOCanglewas20°，theretentionpowerofthetestingforcewas（291.57±49.27）Noftheexperimentalgroupand（390.82±91.44）Nofthecontrolgrouprespectively.Therewasstatisticallysignificantdifferencebetwee

8、ntwogroups（P=0.009）.ConclusionWhenTOCanglewas10