| WEAR AND CHEMICAL DEGRADATION OF ESTHETIC RESTORATIVE MATERIALS |
|
Kyu-Ho Yang, Eun-Young Choi, Nam-Ki Choi, Seon-Mi Kim |
| Department of Pediatric Dentistry, College of Dentistry, Chonnam National University, Dental Research Institute |
| 차세대 레진 개발을 위한 광중합형 복합레진의 화학적 분해와 마모에 관한 연구 |
|
양규호, 최은영, 최남기, 김선미 |
|
전남대학교 치과대학 소아치과학교실 및 치의학 연구소 |
Correspondence:
Kyu-Ho Yang, Tel: 062-220-5476, Email: hellopedo@hanmail.net
|
|
|
|
|
| Abstract |
|
The aim of this study was to evaluate the resistance to degradation and to compare the wear resistance characteristics of four esthetic restorative materials in an alkaline solution(0.1N NaOH). The brands studied were MetafilCX(Sun medical, Japan) Solitaire 2(Heraeus Kulzer, USA), Composan LCM(Promedica, Germany), DenFil(Vericom, Korea). The results were as follows: 1. The mass loss of each brand was 0.74~7.94% and highest value in Metafil(7.94±0.39%). 2. The sequence of the degree of degradation layer depth was in descending order by Metafil, Solitaire 2, DenFil, Composan LCM. There were significant differences between Metafil and the others(p<0.05). 3. The sequence of the Si loss was in descending order by Metafil, Solitaire 2, Composan LCM, DenFil. There were significant differences among the materials(p<0.05). 4. On SEM, destruction of bonding between matrix and filler and on CLSM, the depth of degradation layer of specimen surface was observed. 5. The sequence of maximum wear depth was in descending order by Metafil, Solitaire 2, Composan LCM and DenFil. There were significant differences among the materials(p<0.05). 6. The correlation coefficient between Si loss and degradation layer depth (r=0.491, p<0.05) and Vicker's hardness number and maximum wear depth (r=-0.942, p<0.05) were relatively high. These results indicate that hydrolytic degradation and wear may consider as a evaluation factors of composite resins. |
| Key Words:
Composite resin, Wear, Hydrolytic degradation |
|
PDF Links
Download Citation
