Comparative Evaluation of Physical and Mechanical Properties of Different Brands of Primary Molar Stainless-Steel Crowns: An In Vitro Study
| Autor: | Nilgoon Pasdar, Ali Bijani, Abdolhamid Alhavaz, Shahram Ghasemi, Zhaleh Bamdadian |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Molar
medicine.medical_treatment Perforation (oil well) lcsh:Medicine 030209 endocrinology & metabolism Indentation hardness Crown (dentistry) Stainless steel Corrosion 03 medical and health sciences 0302 clinical medicine Wear Hardness medicine 030212 general & internal medicine Dental Sciences business.industry lcsh:R Metallurgy General Medicine Fatigue limit Galvanic corrosion Compressive strength business Crown |
| Zdroj: | Open Access Macedonian Journal of Medical Sciences Open Access Macedonian Journal of Medical Sciences, Vol 7, Iss 23 (2019) Open Access Macedonian Journal of Medical Sciences; Vol. 7 No. 23 (2019): Dec 15 (OAMJMS); 4120-4126 |
| ISSN: | 1857-9655 |
| Popis: | 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, a total of 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. |
| Databáze: | OpenAIRE |
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