차세대 레진개발을 위한 광중합형 복합레진의 마모와 화학적 분해
Abrasion and chemical degradation of light-cured compositie resin for updated resin development
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
복합레진은 치질과 우수한 결합력을 가지며 심미적인 이유로 치과의 대표적 수복재로 자리잡고 있다. 그러나 저작력에 따른 마모와 구강내 환경에서의 수분흡수에 따른 가수분해가 복합레진의 강도약화를 야기하고 있다. 실험에 사용된 복합레진은 현재 임상에서 많이 사용되고 있는 Filtec supreme, Heliomolar flow, Point4, Tetric flow 이다. 각 제품의 분해저항성과 마모도를 평가하기 위해 각각 10개의 시편을 제작하여 그 중 5개는 37℃의 수중하에 1Kg의 하중을 가하여 10,000 cycle동안의 마모도를 측정하였다. 나머지 5개 시편은 무게 측정을 한 후, 0.1N NaOH 용액, 3㎖에 저장하여 60℃에서 보관한 후 2주 후 제거하여 1.23% HCl로 2시간 동안 중화하고 증류수로 세척한 후 60℃에서 건조하였다. 분해저항성은 무게 손실, 분해층 깊이 및 시편내의 Si의 농도 변화를 근거로 평가하여 다음과 같은 결과를 얻었다. 1. 각 제품의 무게 손실량은 Heliomolar flow, Filtec supreme, Point4, Tetric flow 순이었으며 Heliomolar flow, Filtec supreme을 제외한 다른 제품간에는 유의한 차이를 보였다 (P<0.05). 2. 각 제품의 표면하 분해층 깊이는 Filtec supreme, Heliomolar flow, Tetric flow, Point4 순이었으며 Heliomolar flow, Tetric flow을 제외한 다른 제품간에는 유의한 차이를 보였다(P<0.05). 3. 각 제품으로부터 용출된 Si은 Filtec supreme, Heliomolar flow, Point4, Tetric flow 순이었으며 Point4, Tetric flow을 제외한 다른 제품간에는 유의한 차이를 보였다(P<0.05). 4. 최대마모깊이 측정시 Heliomolar flow, Point4, Tetric flow, Filtec supreme 순이며 0.1 N NaOH 용액에 보관한 레진의 마모깊이가 보관하지 않은 레진에 비해 증가한 양상을 보였다. 5. 주사전자현미경 관찰시 NaOH 용액에 보관한 후 레진 기질과 충전제 사이의 결합의 파괴를 관찰할 수 있었으며, 공촛점 레이저 현미경 관찰시 NaOH 용액에 보관한 후 수복재의 기질과 충전제 사이의 파괴양상인 분해층 깊이를 관찰할 수 있었다.
Abstract
The aim of this study was to evaluate the resistance to degradation and to compare the wear resistance characteristics of four composite resins in an alkaline solution. The resistance to degradation was evaluated on the basis of mass loss(%), degradation depth(㎛), Si loss(ppm) and wear depth. The brands studied were Heliomolar flow, Filtec supreme, Point4, Tetric flow. The results were as follows: 1. The sequence of the mass loss was in descending order by Heliomolar flow, Filtec supreme, Point4, Tetric flow. There was significant differences among the materials except Heliomolar flow and Filtec supreme. 2. The sequence of the degree of degradation layer depth was in descending order by Filtec supreme, Heliomolar flow, Tetric flow, Point4. There were significant differences among the materials except Heliomolar flow and Tetric flow. 3. The sequence of Si loss was in descending order by Filtec supreme, Heliomolar flow, Point4, Tetric flow. There were significant differences among the materials except Point 4 and Tetric flow. 4. The sequence of maximum wear depth was in descending order by Heliomolar flow, Point4, Tetric flow, Filtec supreme and there was increasing wear depth on soaking in 0.1N NaOH solution. 5. When observed with SEM, destruction of bonding between matrix and filler was observed and when observed with CLSM, the depth of degradation layer of specimen surface was observed. There results indicate that wear and hydrolytic degradation could be considered to be evaluation factors of composite resins.
참고문헌 (21)
- "Preservation and restoration of the tooth structure" (1998), Mosby International Ltd
- "A characterization of first-generation flowable composite", 129, pp.567~577 (1998)
- "Influence of chemical on wear of dental composites", 61(10), pp.1180~1183 (1982)
- "Wear resistance of compposites: a solved problem?", 46, pp.256~263 (1998)
- "Chemical softening and wear of dental composites", 64, pp.1326~1331 (1985)
- "Subsurface damage layer of in vivo worn dental composite restorations A silver staining technique for investigation wear of restorative dental composites", pp.675 343~680 348
- "Internal corrosion in dental composite wear", 53, pp.371~380 (2000)
- "Water sorption and mechanical properties of light-cured proprietary composite tooth restorative materials", 13, pp.105~109 (1992)
- "Degradation of glass filler in experimental composites", 60, pp.1867~1875 (1981)
- "Clinical evaluation of composite resins as anterior and posterior restorative materials", 33, pp.407~416 (1975)
- "Influence of oral fluid on composite resin and glass-ionomer cement", 52(2), pp.182~189 (1984)
- "Relative solubilities of hybrid ionomers and compomers by acid impingement", 26, pp.786~790 (1999)
- "Surface pH of composite resins in water" (1992)
- "Subsurface damage and related phenomena in three restorative resins" (1991)
- "Hydrolytic degradation of dental composites", 855 (1996)
- "Confocal scanning optical microscopy and its applications for biological specimens", 94, pp.175~206 (1989)
- "Dental restorative resins.Types and characteristics", 27, pp.697~711 (1983)
- "Material development and clinical performance of composite resins", 48, pp.664~671 (1982)
- "Creep of conventional and microfilled dental composites", pp.14~25 (1984)
- "Comparative wear ranking of dental restoratives with the BIOMAT wear simulator", 26, pp.228~235 (1999)
- "Comparative wear ranking of dental restoratives with the BIOMAT wear simulator", 26, pp.228~235 (1999)