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Study on the Establishment of Newly Developed Restorative Techniques and the Clinical Observation of CAD/CAM Systems.

新开发的修复技术的建立及CAD/CAM系统的临床观察研究。

基本信息

批准号：
09307044
负责人：
INOUE Kiyoshi
金额：
$ 24.58万
依托单位：
Okayama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

1. The effect of the three types of cavity forms on the fit of the inlay restorations fabricated with Celay and Cerec 2 was investigated. There were significant differences of the cement thickness among cavity forms in each inlay system. 2. A3-D curved shape measurement apparatus with a laser source was used in the measurement of the shape of the dental cast. It was nearly reconstructed by using the spherical SCAR robot equipped with a dental electric engine. 3. Observed and predicted L ィイD1*ィエD1and bィイD1*ィエD1 exhibited higher value than aィイD1*ィエD1 value when the thickness of Celey porcelain blocks was changed. The application of Kubelka-Munk equation was able to predict color of porcelain. 4. The in vitro wear amount of Cerec porcelain was signifiantly less than that of highly filler-loaded composite resin (Hybrid Ceramic). However, the wear amount of antagonistic enamel was greater for Cerec porcelain than that of Hybrid Ceramic. 5. The mean cement thickness around Class II ceramic i … More nlay restorations was 53.8-156.1μm for the Cerec 2 group and 51.6-73.7μm for the laboratory-fired group. 6. The marginal adaptability of MOD resin inlays fabricated by a CAD/CAM system (GN-1) became acceptable as they were followed with the adjustment of spacer application. 7. The marginal leakage values on the Class II combination restorations of Cerec and composite resin were comparative to those of Cerec single inlay restorations as the cervical dentin margin. 8. The mean cement thickness around the Cerec 2 laminate veneer was 277μm in the grinding method with only the disk, but 247μm with the disk and bur. 9. Polymerization shrinkage and thermal dimensional change of the luting materials brought about large effect on the adaptation of the Cerec inlays. 10. The depth of wear tended to increase, as the film thickness of resin cement increased. The usage of an adhesive system significantly reduced the wear rate of resin cement. 11. Six-year clinical observation of Cerec inlay restorations showed that wear of resin cement and opposing enamel cusp was clinically detected in 7 of 15 cases and in 5 of 15 cases respectively. Less

1. 研究了三种空腔形式对Celay和cerec2嵌体修复体配合度的影响。在不同的嵌体体系中，不同型态的水泥厚度存在显著差异。2. 采用带激光源的三维曲面形状测量仪对牙模进行了形状测量。使用配备牙科电动发动机的球形SCAR机器人几乎可以重建它。3. 当Celey瓷块厚度发生变化时，观察和预测的L′′γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ γ。应用Kubelka-Munk方程可以预测瓷器的颜色。4. Cerec瓷的体外磨损量明显小于高填充复合树脂（Hybrid Ceramic）。而cerc瓷的拮抗牙釉质磨损量大于Hybrid瓷。ⅱ类陶瓷修复体周围平均水泥厚度为53.8 ~ 156.1μm，实验烧制组为51.6 ~ 73.7μm。6. CAD/CAM系统（GN-1）制造的MOD树脂嵌体的边际适应性随着垫片应用的调整而变得可以接受。7. Cerec与复合树脂复合II类修复体与Cerec单嵌体修复体作为牙本质缘的边缘渗漏值比较。8. 仅磨盘磨削时，Cerec 2单板周围水泥平均厚度为277μm，磨盘加磨头磨削时平均水泥厚度为247μm。9. 嵌体材料的聚合收缩和热尺寸变化对嵌体的适应性有较大影响。10. 随着树脂水泥膜厚度的增加，磨损深度有增加的趋势。胶粘剂体系的使用显著降低了树脂水泥的磨损率。11. 对Cerec嵌体修复体进行6年临床观察，15例中有7例临床发现树脂粘接磨损，15例中有5例临床发现对牙尖磨损。少