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时间:2020-04-30
《口腔修复材料在锥形束CT影像中伪影的定量评价.pdf》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、北京大学学报(医学版)JOURNALOFPEKINGUNIVERSITY(HEALTHSCIENCES)Vo1.45No.6Dec.2013·989··论著·口腔修复材料在锥形束CT影像中伪影的定量评价原福松,孙玉春,谢晓燕,王勇,吕培军。△(北京大学口腔医学院·VI腔医院1.口腔医学计算机应用中心,口腔数字化医疗技术和材料国家工程实验室;2.放射科,北京100081)[摘要]目的:定量评价氧化锆等8种常见口腔修复材料在锥形束CT影像中产生伪影的程度。方法:针对下颌第一磨牙全冠预备体,分别制作氧化
2、锆、玻璃陶瓷、聚合瓷、金铂合金、纯钛、金钯合金、钻铬合金和镍铬合金共8种全冠,用离体牙作对照,固定在光固化树脂固定板上。用锥形束CT扫描全冠及离体牙,将DICOM数据导入MIM—ICS10.0软件,在二维断层图像中,定量评价全冠周围伪影的条纹数量和最大径。结果:在二维断层图像中,天然牙、玻璃陶瓷和聚合瓷无伪影,氧化锆和金属均产生条状伪影,条数为5~9条/全冠,左右和上下最大径分别为2.4—2.6cnl和2.2—2.7cm。结论:在锥形束CT二维断层图像中,氧化锆和金属全冠周围均会产生伪影,玻璃陶瓷
3、、聚合瓷全冠和天然牙齿不产生伪影。[关键词]锥束计算机体层摄影术;牙科材料;牙修复体;伪影[中图分类号]R783.1[文献标志码]A[文章编号]1671—167X(2013)06-0989-04doi:10.3969/j.issn.1671167X.2013.06.033QuantitativeassessmentonartifactsofdentalrestorativematerialsinconebeamcomputedtomographyYUANFu—song,SUNYuchun,XIEX
4、iao—yan,WANGYong’,LVPei-jun(1.CenterofDigitalDentistry,NationalEngineeringLaboratoryforDigitalandMaterialTechnologyofStomatology,2.DepartmentofRadiology,PekingUniversitySchoolandHospitalofStomatologyBeijing100081,China)ABSTRACTObjective:T0quantitative
5、lyevaluatetheartifactsappearanceofeightkindsofcommondentalrestorativematerials.suchaszirconia.Methods:Fortheful1一crowntoothpreparationofmandibu—larfirstmolar.eightkindsoffu11.crowns,suchaszirconiaall-ceramiccrown,glassceramiccrown,eera—magecr0wn,Au-Pt
6、basedporcelain.fused.metal(PFM)crown,PureTitaniumPFMcrown,Co—CrPFMcrown.Ni—CrPFMcrown,andAu—Pdmetalcrownwerefabricated.Andnaturalteeth凡vitrowereusedascontrols.Thesefu11一crownandnaturalteeth凡vitroweremountedanultraviolet—curableresinfixedDlate.Highreso
7、lutionconebeamcomputedtomography(CBCT)wasusedtoscanallofthecrownsandnaturalteethiitro.andtheirDICOMdatawereimportedintosoftwareMIMICS10.0.Then,thenun—berofstripesandthemaximumdiametersofartifactsaroundthefu11一crownswereevaluatedquantitativelyintwo—dim
8、ensionaltomographyimages.Results:Inthetwo—dimensionaltomographyimages,theartifactsdidnotappeararoundthenaturalteethvitro.glassceramiccrown,andceramagecrown.Butthrart1一factsappearedaroundthezirconiaall—ceramicandmetalcrown.Thenumberofstripeso±a
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