不同品牌乳磨牙不锈钢冠物理和力学性能的比较评价：一项体外研究
Comparative Evaluation of Physical and Mechanical Properties of Different Brands of Primary Molar Stainless-Steel Crowns: An In Vitro Study.
作者信息
Bamdadian Zhaleh, Pasdar Nilgoon, Alhavaz Abdolhamid, Ghasemi Shahram, Bijani Ali
机构信息
Department of Pediatric Dentistry, Faculty of Dentistry, Mazandaran University of Medical Sciences, Sari, Iran.
Health Research Institute, Dental Material Research Center, Department of Pediatric Dentistry, Faculty of Dentistry, Babol University of Medical Sciences, Babol, Iran.
出版信息
Open Access Maced J Med Sci. 2019 Dec 10;7(23):4120-4126. doi: 10.3889/oamjms.2019.861. eCollection 2019 Dec 15.
BACKGROUND
There is some cases of perforation and undesirable properties of some primary molars stainless steel crowns.
AIM
The aim of this study was to compare the physical and mechanical properties of different commercial brands of these crowns.
METHODS
In an in vitro study, 10 stainless steel tooth crowns of the second primary mandibular molars size 6 of 4 different commercial brands (a total of 280 crowns) were evaluated. These crowns were included KTR Pre-trimmed and Crimped Nichro Stainless Steel Primary Molar Crowns (KTR, China); 3M Stainless Steel Primary Molar Crowns (ESPE, St paul; USA); NuSmile SSC Pre-contoured (Inc, Houstone, TX; USA) and Kids crown (Shinghung, Seoul; Korea). Corrosion and galvanic corrosion, wear, microhardness, compressive strength, fatigue strength of crowns and weight percent of elements were investigated.
RESULTS
The highest rate of microhardness, compressive and Fatigue strength of the crowns were made by Nu Smile > 3M > Kids Crown > KTR respectively. The highest rate of corrosion potential in corrosion and Galvanic corrosion tests was in KTR > Kids crowns > 3M > Nu smile respectively. The order of crown wear was KTR > Kids Crown > 3M > Nu Smile respectively. The highest amount of nickel element was found in the Nu Smile crown and the highest amount of chrome in the 3M crown with a significant difference with others (p < 0.001). The KTR and Kids crowns lacked molybdenum.
CONCLUSION
The results showed that Nu Smile crown has better physical and mechanical properties than other evaluated crowns in this study.
背景
一些乳磨牙不锈钢冠存在穿孔及不良性能的情况。
目的
本研究旨在比较不同商业品牌的此类冠的物理和力学性能。
方法
在一项体外研究中，对4个不同商业品牌的10个下颌第二乳磨牙6号尺寸的不锈钢牙冠（共280个冠）进行了评估。这些冠包括KTR预修整和压接镍铬不锈钢乳磨牙冠（KTR，中国）；3M不锈钢乳磨牙冠（ESPE，圣保罗；美国）；NuSmile SSC预成型（公司，得克萨斯州休斯顿；美国）和儿童冠（首尔盛兴；韩国）。研究了冠的腐蚀和电偶腐蚀、磨损、显微硬度、抗压强度、疲劳强度以及元素的重量百分比。
结果
冠的显微硬度、抗压强度和疲劳强度最高值分别由Nu Smile > 3M > 儿童冠 > KTR制成。在腐蚀和电偶腐蚀试验中，腐蚀电位最高值分别为KTR > 儿童冠 > 3M > Nu Smile。冠磨损的顺序分别为KTR > 儿童冠 > 3M > Nu Smile。在Nu Smile冠中发现镍元素含量最高，在3M冠中铬含量最高，与其他冠有显著差异（p < 0.001）。KTR和儿童冠不含钼。
结论
结果表明，在本研究中，Nu Smile冠比其他评估的冠具有更好的物理和力学性能。
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