【作者】 赵要武；

【导师】 唐亮； 王继群；

【作者基本信息】 暨南大学 ， 口腔修复， 2001， 硕士

【摘要】 目的：测量Finesse全瓷冠的适合性，为其临床应用提供适合性方面的理论依据。方法：按统一尺寸制作上中切牙全瓷冠预备体的玻璃代型30个，玻璃代型颈缘呈90°肩台，内线角圆钝，宽度为lmm，轴壁聚合度为5°，高8mm，所有点线角圆钝。30个玻璃代型随机分为ABC三组，每组10个。A组制作金属全冠，B组制作金属烤瓷全冠，C组制作Finesse全瓷冠。每组冠各按厂家使用说明制作。冠完成后，指压就位10分钟，置体视显微镜下测量其边缘浮出量。然后用聚羧酸锌粘固剂粘固三组全冠，指压就位并维持10分钟。用环氧树脂包埋粘固后的全冠，沿代型唇舌向直径线纵剖，置体视显微镜下测量粘固后的边缘浮出量和粘固剂的厚度。对粘固前后测量的数据进行统计学分析。结果：金属全冠、金瓷全冠、Finesse全瓷冠粘固前的边缘浮出量分别为27.32±9.81μm，29.99±13.57μm，37.61±9.13μm，统计分析无显著性差异；粘固后的边缘浮出量分别为57.11±18.93μm，61.49±17.95μm，65.8515.11μm，粘固剂厚度分别为40.63±8.01μm，41.64±17.21μm，40.84±9.73μm，统计分析均无显著性差异；实验结果显示边缘浮出量和粘固剂的厚度均在临床接受范围内；但每组全冠粘固前和粘固后的边缘浮出量有显著性差异。结论：（1）Finesse全瓷冠的边缘浮出量和粘固剂厚度与金属全冠、金瓷全冠比较，无显著性差异，提示其适合性良好，完全可为临床接受；（2）粘接对全冠修复体的边缘浮出量有影响；（3）代型涂层的厚度对全冠粘固剂的厚度及粘固剂的均匀程度有影响；（4）喷砂对Finesse全瓷冠适合性的影响较金属全冠及金瓷全冠大。更多还原

【Abstract】 Objective: This study was to measure marginal opening and cement thickness of Finesses all ceramic crown and provide theoretic foundation for clinical application of Finesse all ceramic crown. Material and metbods:30 working glass dies simulating prepared the maxillary central incisor for all ceramic crown were fabricated .The margins for the dies were a 90-degree shoulder with round axio-gingival-line angle, 1.0mm in width .The dies had an axial taper 5 degrees and were 8mm hight.30 dies were randomly divided into 3 groups(ABC),each group had 10 dies. A group for metal crown, B group for porcelain fused to metal crown and C group for Finesses all ceramic crown. All crowns were made in accordance with their manufacture抯 recommendations, then were. seated on their respective glass die with finger pressure for 10 minutes .The marginal openings before cementation were measured by using a video-enhanced measuring microscope with digital micrometer. All crowns were cemented with poly-carboxylic acid zinc cement and seated on their respective glass die by finger pressure and sustain for 10 minutes. The cemented crowns were embedded individually with epoxy resin and section buccolingually into two slices. The margin opening and cement film thickness were measured by using the same video-enhanced measuring microscope with digital micrometer The data were statistically analyzed with a one-way analysis of variance and T-test. Results: Before cementation the marginal opening of the metal crown was 27.32 ?.8 1 it m, the porcelain fused to metal crown was 29.99?13.57 1? m, Finesse all ceramic crown was 37.61 ?9.13 it m. The Statistical analysis indicated that there was no significant difference among the three group crowns. After cementation the marginal opening of the metal crown was 57.11 ?18.93 it m, the porcelain fused to metal crown was 61.49?17.95 1-i m, Finesse all ceramic crown was 65.85 ?15.11 i~ m, the cement thickness of the metal crown was 40.63 ?.01 i.~ m, the porcelain fused to metal crown was 4 1.64?17.21 1.t m, Finesse all ceramic crown was 40,84 ?9.73 14 m, there also were no significant difference among three groups crowns However, the marginal opening of each group crowns had statistically significant difference between before cementation and after cementation. Conclusion: (1) Our studies showed that Finesse all ceramic crown yield acceptable marginal fit and could satisfy the clinical demand;(2) The results indicated that cementation of crown had great effect on the marginal fit;(3) The thickness of die space had some effect on Cement抯 thickness and equitability;(4) Sand-blast had more effect on the finesse all ceramic crown than the mental crown and procelin-fused mental crown.更多还原