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The Effect of Aging on Surface Hardness of Provisional Crown and Bridge Material | ||
| Tikrit Journal for Dental Sciences | ||
| Volume 9, Issue 2, December 2021, Pages 129-136 PDF (683.99 K) | ||
| DOI: 10.25130/tjds.9.2.9 | ||
| Authors | ||
| Zainab Younis Abdullah* 1; Suha Fadhil Dulaimi2 | ||
| 1(1) Postgraduate student in Prosthetic Dental Technology, Department of Prosthetic Dental Technology, College of Health and Medical Technology, Middle Technical University, Baghdad, Iraq. | ||
| 2(2)Asst. Prof., Department of Prosthetic Dental Technology, College of Health and Medical Technology, Middle Technical University, Baghdad, Iraq. | ||
| Abstract | ||
| Background: Mechanical characteristics are necessary for temporary treatments. that enable them to hold use within the oral cavity. Surface hardness is an accurate indication of wear and deterioration resistance. Aim: To evaluate and compare the surface Hardness of 2 types of composite material (Harvard- temp and Charmtemp). The specimens were tested in dry conditions and after 2 week of aging in artificial saliva. Material and Methods:Whole of 32 specimens of dimensions 64mm×10mm×2.5mm divided in two groups according the type of material(Harvard- temp or Charm- temp). Each group of material have (16) specimens. These specimens (16) divided in two group: control group (8 specimens) in dry conditions and aging group (8 specimens) 2 week stored in artificial saliva.ElCO meter Shore (D) device was used to indicate the values hardness of specimens before and after aging in artificial saliva. Results: After comparing the results, a significant difference in the surface hardness of dry and aging condition of Harvard – temp (P<0.05). However, there is a nonsignificant effect noticed for dry and aging condition of Charm- temp groups (P>0.05). comparison between Harvard– temp and Charm- temp in dry or aging condition revealed for dry condition high significant P<0.001 and significant difference P<0.05 for aging at artificial saliva. Conclusion: the surface hardness after aging in artificial saliva of Charmtemp not effect. But Harvard-temp showed significant reduction in surface hardness after aging for 2 weeks in artificial saliva. Comparing between the two materials in dry and aging condition showed difference between two conditions. | ||
| Keywords | ||
| Temporary Fixed Prosthesis; Hardness; provisi | ||
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