摘要
目的观察椅旁CAD/CAM不同间隙设置对IPS e.max全瓷冠边缘适合性的影响,为临床应用提供实验依据。方法采用Ivoclar vivadent模型上的右上颌第一磨牙全冠标准模型翻制硅橡胶阴模,灌注超硬石膏预备体模型25个。用Sirona Cerec AC扫描采集光学印模,获得25个数字化代型。将代型随机分为5组,运用CEREC version 4.4.4操作软件将间隙值分别设置为30μm(A组)、60μm(B组)、90μm(C组)、120μm(D组)和150μm(E组),通过数控铣床切削得到IPS e.max全瓷冠25个,每组5个。采用Variolink N义获嘉粘结系统粘结。Leica体式显微镜扫描代型颊侧、舌侧、近中和远中4个基准点的垂直边缘缝隙,计算均数和标准差,应用SPSS 20.0进行统计学分析,组间及组内两两比较采用LSD检验。结果 4个基准点的边缘适合性值A组均>120μm;E组均<30μm;B、C、D组为30~120μm。A、E组与B、C、D组分别相比均具有显著统计学差异(P<0.05);B、C、D组之间相比无统计学差异(P>0.05)。各组内颊侧、舌侧、近中、远中不同测量位置之间无统计学差异(P>0.05)。结论 CEREC version 4.4.4间隙设置值为60、90、120μm时,IPS e.max全瓷冠可以获得临床可接受的边缘适合性。
Objective To observe the influence of different space settings on the marginal adaptation of chair-side CAD/CAM IPS e.max all ceramic crowns to provide experimental evidence for clinical application.Methods A right maxillary first molar in the ivoclar vivadent standard model was used and subsequently replicated into silicone rubber negative mold.Respectively,twenty-five preparations of die stone were irrigated.Twenty-five digital images were obtained by using optical impression of Sirona Cerec AC system.Twenty-five of them were randomly divided into 5 groups,and luting spaces were set to 30μm(A group),60μm(B group),90μm(C group),120μm(D group)and 150μm(E group)by CEREC version 4.4.4 computer software.Twenty-five all-ceramic crowns with five ones in each group were obtained according to space settings by digital control cutting equipment.The Variolink N system was used for bonding.The vertical marginal gaps of four datum points,buccal,lingual,mesio and distal points were measured by Leica microscope.The mans and standard deviations were calculated.And the data were analyzed by LSD-test using SPSS 20.0,and the inter-group and intra-group comparison was examined by LSD.Results The marginal adaptations of bucco-lingual and mesio-distal sides were higher than 120μm in A group,and the marginal adaptations of bucco-lingual and mesio-distal sides were lower than 30μm in E group.The marginal adaptations of bucco-lingual and mesio-distal sides in B,C and D groups were between 30μm to 120μm.There were statistically significant differences(P<0.05)comparing A group with B,C or D groups in the marginal adaptation of bucco-lingual and mesio-distal sides.There were statistically significant differences(P<0.05)comparing E group with B,C or D groups in the marginal adaptation of bucco-lingual and mesio-distal sides.There were no statistically significant differences(P>0.05)among B,C and D groups in the marginal adaptation of bucco-lingual and mesio-distal sides.There were no statistically significant differences(P>0.05)in
作者
刘琳洁
严媛媛
王章涵
丁伟山
LIU Linjie;YAN Yuanyuan;WANG Zhanghan;DING Weishan(Department of Endodontics,School of Stomatology,Shandong University&Shandong Provincial Key Laboratory of Oral Tissue Regeneration,Ji'nan 250012,China)
出处
《口腔医学》
CAS
2019年第8期710-713,共4页
Stomatology
基金
山东省科技发展计划项目(2014GSF118065)
