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通过空气干燥法、传统热风烤箱、微波炉以及微波与传统烤箱结合的方式对磷酸盐结合包埋材料（无环）的径向拉伸强度进行比较评估：一项研究。

Comparative evaluation of diametral tensile strength of phosphate-bonded investment (ringless) material by using air-drying method, conventional hot air oven, microwave oven, and combination of microwave and conventional oven: An study.

作者信息

Rathi Akhil, Pande Neelam, Radke Usha, Deshpande Saee, Chandak Anuj

机构信息

Department of Prosthodontics, V.S.P.M's Dental College and Research Centre, Nagpur, Maharashtra, India.

出版信息

J Indian Prosthodont Soc. 2019 Jul-Sep;19(3):248-254. doi: 10.4103/jips.jips_45_19.

DOI:10.4103/jips.jips_45_19
PMID:31462864
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6685339/
Abstract

AIM

This study evaluated and compared the diametral tensile strength (DTS) of phosphate-bonded investment (PBI) material (ringless) used in removable cast partial denture fabrication.

SETTINGS AND DESIGN

Comparative - study.

MATERIALS AND METHODS

The PBI material, Wirovest used in this study was subjected to four different drying methods. A total of 80 specimens were prepared in a cylindrical form; 20 specimens were air dried for 2 h, 20 specimens were dried in a conventional oven at 230°C for 1 h, 20 specimens were dried in microwave oven at 600 W for 10 min, and remaining 20 specimens were dried first in microwave oven and then in conventional oven. The dried specimens were tested at 2-h interval for diametral compression at a crosshead speed of 0.5 cm/min.

STATISTICAL ANALYSIS USED

Pairwise analysis.

RESULTS

The microwave drying technique and drying by combination method resulted in greater DTS, respectively.

CONCLUSION

Within the limitation of this study, PBI specimens dried in microwave oven at 600W for 10 min increased the diametral strength and are also a time-saving procedure.

摘要

目的

本研究评估并比较了用于可摘局部义齿制作的无环磷酸盐粘结包埋材料（PBI）的径向拉伸强度（DTS）。

设置与设计

对比研究。

材料与方法

本研究中使用的PBI材料Wirovest采用四种不同的干燥方法。总共制备了80个圆柱形试件；20个试件空气干燥2小时，20个试件在传统烤箱中于230°C干燥1小时，20个试件在微波炉中以600W干燥10分钟，其余20个试件先在微波炉中干燥，然后在传统烤箱中干燥。干燥后的试件每隔2小时以0.5厘米/分钟的十字头速度进行径向压缩测试。

所用统计分析方法

成对分析。

结果

微波干燥技术和组合干燥法分别产生了更高的径向拉伸强度。

结论

在本研究的限制范围内，在微波炉中以600W干燥10分钟的PBI试件提高了径向强度，并且也是一种节省时间的方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/365d/6685339/4ef0832072b2/JIPS-19-248-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/365d/6685339/2926bc3a5e97/JIPS-19-248-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/365d/6685339/4b558d63dc2b/JIPS-19-248-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/365d/6685339/f76ab773cf58/JIPS-19-248-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/365d/6685339/4ef0832072b2/JIPS-19-248-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/365d/6685339/2926bc3a5e97/JIPS-19-248-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/365d/6685339/4b558d63dc2b/JIPS-19-248-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/365d/6685339/f76ab773cf58/JIPS-19-248-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/365d/6685339/4ef0832072b2/JIPS-19-248-g004.jpg

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