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CASTABILITY QUANTIFICATION BY IMAGE ANALYSIS

通过图像分析量化可预测性

基本信息

批准号：
3437716
负责人：
STEPHEN M COHEN
金额：
$ 12.15万
依托单位：
UNIV OF MED/DENT OF NJ-NJ MEDICAL SCHOOL
依托单位国家：
美国
项目类别：
财政年份：
1991
资助国家：
美国
起止时间：
1991-09-30 至 1994-09-29
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/3437716
关键词：
alloys beryllium biomaterial evaluation chromium cobalt copper dental casting material gallium gold image processing metal dental material nickel palladium statistics /biometry temperature tin

项目摘要

Excellent castability characteristics in dental alloys are critical for the consistent production of sound, well fitting cast restorations without the necessity of frequent costly and time consuming remakes. The use of mesh monitors to evaluate castability has become increasingly popular. However, they are usually evaluated by manual counting, a method with could be improved upon. The objective of this proposal is to combine newly developed image analysis techniques with the well established mesh casting monitor to produce a "state of the art" evaluation system and to then use this system to quantify castability variations in 8 popular commercial PFM alloys. The study will focus on the following alloys: Will-Ceram Y-2, Cameo, Olympia, Will-Ceram W-1, Naturelle, Rexillium III, Lifecast and Noravex. All manufacturers' recommended burnout and casting techniques will be strictly adhered to except that besides using only the recommended burnout-and casting temperatures, variations of + 100oF will also be used in the study. The cast monitors will be evaluated by area fraction imaging techniques developed with other instrumentation (PIAS System) in a previous investigation. In addition, all samples will be evaluated by ordinary manual counting (with magnification) and the results of two methods compared statistically. The proposed experimental layout is a three factor factorial design: 8 (alloys) x 3 (casting temperatures) x 3 (burnout temperatures) = 72 sets. A sample size of N=10 will be used for each condition. ANOVA and pairwise multiple comparison statistical analyses will be performed on the Arc Sin transformed data obtained by image analysis as well as by manual counting.

牙科合金中优异的可铸性特性对于牙科合金的性能至关重要。一致的生产声音，良好的拟合铸造没有需要频繁的昂贵和耗时的重拍。使用补片用于评估可铸性的监视器已经变得越来越流行。然而，在这方面，它们通常通过人工计数进行评估，这种方法可以改进了。本提案的目的是将联合收割机开发了图像分析技术与完善的网格铸造监测器产生一个“最先进的”评估系统，然后使用该系统量化了8种流行的商业PFM的可铸性变化合金. 该研究将集中在以下合金：Will-Ceram Y-2， Cameo、Olympia、Will-Ceram W-1、Naturelle、Rexillium III、Lifecast和 Noravex. 所有制造商推荐的燃尽和铸造技术只不过，除了使用推荐的烧成和铸造温度，也将使用+100oF的变化研究中。将通过面积分数成像技术对管型监测器进行评估在以前的研究中与其他仪器（皮亚斯系统）一起开发调查此外，所有样本将通过普通手动计数（放大）和两种方法的结果统计比较。建议的实验布局是一个三因素析因设计：8 （合金）× 3（铸造温度）× 3（燃尽温度）= 72套。每种条件将使用N=10的样本量。方差分析和配对将对Arc Sin进行多重比较统计分析通过图像分析以及手动计数获得的转换数据。