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一项比较研究，以检查由不同材料增强的自凝聚甲基丙烯酸甲酯树脂制成的临时固定局部义齿的断裂强度：一项研究。

A comparative study to check fracture strength of provisional fixed partial dentures made of autopolymerizing polymethylmethacrylate resin reinforced with different materials: An study.

作者信息

Gupt Parikshit, Nagpal Archana, Samra Rupandeep Kaur, Verma Ramit, Kaur Jasjeet, Abrol Surbhi

机构信息

Private Practitioner, Prosthodontist, Sundernagar, Himachal Pradesh, India.

Department of Prosthodontics, Himachal Dental College, Sundernagar, Himachal Pradesh, India.

出版信息

J Indian Prosthodont Soc. 2017 Jul-Sep;17(3):301-309. doi: 10.4103/jips.jips_79_17.

DOI:10.4103/jips.jips_79_17
PMID:28936046
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5601501/
Abstract

AIM

The purpose of the study was to evaluate the fracture strength of provisional fixed partial dentures made of autopolymerizing polymethylmethacrylate (PMMA) resin using different types of reinforcement materials to determine the best among them.

MATERIALS AND METHODS

Fifty samples were made (10 samples for each group) with autopolymerizing PMMA resin using reinforcement materials (stainless steel wire: looped and unlooped and glass fiber: loose and unidirectional) as 3-unit posterior bridge. The test specimens were divided into five groups depending on the reinforcing material as Group I, II, III, IV, and V; Group I: PMMA unreinforced (control group), Group II: PMMA reinforced with stainless steel wire (straight ends), Group III: PMMA reinforced with stainless steel wire (looped ends), Group IV: PMMA reinforced with unidirectional glass fibers, and Group V: PMMA reinforced with randomly distributed glass fibers. Universal testing machine was used to evaluate and compare the fracture strength of samples. Comparison of mean ultimate force and ultimate stress was done employing one-way analysis of variance and Tukey's tests.

RESULTS

The highest and lowest mean ultimate force and mean ultimate stress were of Group IV and I, respectively. Tukey's honestly significant difference multiple comparison for mean ultimate force and stress shows the increase in strength to be statistically significant ( < 0.05) except for the samples reinforced with randomly distributed glass fibers ( > 0.05).

CONCLUSION

Unidirectional glass fibers showed the maximum strength, which was comparable to mean values of both stainless steel wire groups. Low cost and easy technique of using stainless steel wire make it the material of choice over the unidirectional glass fiber for reinforcement in nonesthetic areas where high strength is required.

摘要

目的

本研究旨在评估使用不同类型增强材料的自凝聚甲基丙烯酸甲酯（PMMA）树脂制作的临时固定局部义齿的断裂强度，以确定其中最佳的材料。

材料与方法

使用增强材料（不锈钢丝：环形和非环形，以及玻璃纤维：松散和单向）作为3单位后牙桥，用自凝PMMA树脂制作50个样本（每组10个样本）。根据增强材料将测试样本分为五组，即第I组、第II组、第III组、第IV组和第V组；第I组：未增强的PMMA（对照组），第II组：用不锈钢丝（直端）增强的PMMA，第III组：用不锈钢丝（环形端）增强的PMMA，第IV组：用单向玻璃纤维增强的PMMA，第V组：用随机分布玻璃纤维增强的PMMA。使用万能试验机评估和比较样本的断裂强度。采用单因素方差分析和Tukey检验对平均极限力和极限应力进行比较。

结果

平均极限力和平均极限应力最高和最低的分别是第IV组和第I组。Tukey的平均极限力和应力的诚实显著差异多重比较表明，除了用随机分布玻璃纤维增强的样本（P>0.05）外，强度增加具有统计学意义（P<0.05）。

结论

单向玻璃纤维显示出最大强度，与两个不锈钢丝组的平均值相当。不锈钢丝成本低且使用技术简便，使其成为在需要高强度的非美观区域进行增强时比单向玻璃纤维更具选择优势的材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/201a/5601501/dc6c13c702ef/JIPS-17-301-g017.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/201a/5601501/dc6c13c702ef/JIPS-17-301-g017.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/201a/5601501/e6858e7aa4bc/JIPS-17-301-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/201a/5601501/ebb37510b6fe/JIPS-17-301-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/201a/5601501/1d2c7c8a57de/JIPS-17-301-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/201a/5601501/e900f75b34dd/JIPS-17-301-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/201a/5601501/605b4eb94854/JIPS-17-301-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/201a/5601501/280cbf2378af/JIPS-17-301-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/201a/5601501/d6f104ff8006/JIPS-17-301-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/201a/5601501/dc6c13c702ef/JIPS-17-301-g017.jpg

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