Comparison of color stability, mechanical and chemical properties according to temporary crown resin type
10.14815/kjdm.2019.46.1.11
- Author:
Song Yi YANG
1
;
Ji Yeon KWON
;
Ji Su NO
;
So Yeon PARK
;
Ha Eun PARK
;
Eun Ji BAEK
;
Su Yeon IM
;
Jae Sung KWON
Author Information
1. Department of Dental Hygiene, College of Medical Science, Konyang University, Daejeon, Republic of Korea.
- Publication Type:Original Article
- Keywords:
Color stability;
Flexural strength;
Micro hardness;
Temporary crown resin;
Water sorption and solubility
- MeSH:
Aging;
Crowns;
Hardness Tests;
Immersion;
Solubility;
Syringes;
Water
- From:
Korean Journal of Dental Materials
2019;46(1):11-20
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Objective of this study was to compare the color stability, mechanical and chemical properties of three different types of temporary crown resins. Commercially available powder-liquid (Group PL), light-cured (Group LC) and auto-mix syringe (Group AM) types' temporary crown resins were used as experimental groups for each of the evaluation. All the test groups were evaluated after 1 day and 7 days of immersion in various staining solutions. The colors of all groups before and after storage in the staining solutions were measured by a spectrophotometer based on CIE Lab system, and the color differences (ΔE(*)) thereby calculated. Micro hardness test was performed before water storage and aging after 7 days at 37 ℃. In addition, flexural strength, water sorption and solubility tests were performed according to international standard, ISO 10477. All experimental groups showed significant color change in staining solutions when compared to those stored in the control solution (distilled water) (p<0.05). Group PL showed the least color change among the three groups followed by Group AM (p<0.05). This tendency was observed after 7 days of immersion. In terms of the micro hardness test, Group PL showed the highest value among the three groups followed by Group AM (p<0.05). Additionally, the flexural strength decreased in the following order: AM > PL > LC (p<0.05). Water sorption and solubility increased in the following order: AM < PL < LC (p<0.05). The results of this study would provide useful information when choosing temporary crown resin types in various clinical situations.
