CAJ | 학술논문

背景:尽管对光固化树脂的流变行为已有较多研究,但对光固化树脂临床操作性能的评价指标,即流动性、充填性、成形性和稳定性,目前口腔材料界还没有统一的定义.目的:评价含固位性填料(retentive filler,RF填料)和普通填料(normal filler,NF填料)的未聚合光崮化复合树脂的动态黏弹性,并探讨两种光固化复合树脂动态黏弹性对临床操作性能的影响,以确定理想的光固化复合树脂应具备的条件.设计、时间及地点:结合材料学基础实验和临床应用的对比观察.基础实验部分先期于2003-01在北京中国科学院(化学研究所)工程塑料国家重点实验室完成;临床观察部分在海南省海口市人民医院口腔医学中心完成,时间一直持续到2006-12.材料:光固化复合树脂包括含RF填料的实验性复合树脂Ⅰ(experimental composite resin Ⅰ,ECR-Ⅰ)和含普通钡玻璃填料的实验性复合树脂Ⅱ(experimental compositeresin Ⅱ.ECR-Ⅱ),两者填料含量的百分比(体积)相同,并含有相同的树脂基质和光固化体系,由北京大学口腔医学院口腔材料研究室配制.方法:在室温25℃条件下,采用平行板动态应力流变仪DSR-200,分别测试用RF填料强化的未聚合光固化复合树脂ECR-Ⅰ和用NF填料强化的未聚合光固化复合树脂ECR-Ⅱ的动态黏弹性.采用流动性、充填性、成形性和稳定性4个指标评估两种树脂的临床操作性能.主要观察指标:两种复合树脂的黏弹性质(G',G",tall δ)和临床操作性能.结果:两种树脂的动态黏弹性对剪切率比较敏感,ECR-Ⅰ的贮能模量(G')明显高于ECR-Ⅱ,临床显示ECR-Ⅰ有更好的稳定性和成形性,潜在变形小.ECR-Ⅱ的损耗模量(G")明显高于ECR-Ⅰ,临床显示ECR-Ⅱ流动性更好.ECR-Ⅰ损耗角(tan δ)明显低于ECR-Ⅱ,临床显示ECR-Ⅱ更多黏性行为,充填性更好,容易和牙齿上的洞壁贴合.结论:对照两种复合树脂的黏弹性质(G',G",tan δ)和临床操作性能,理想的光固化复合树脂应有较高的贮能模量(G')和较低的损耗角(tan δ). 揹景:儘管對光固化樹脂的流變行為已有較多研究,但對光固化樹脂臨床操作性能的評價指標,即流動性、充填性、成形性和穩定性,目前口腔材料界還沒有統一的定義.目的:評價含固位性填料(retentive filler,RF填料)和普通填料(normal filler,NF填料)的未聚閤光崮化複閤樹脂的動態黏彈性,併探討兩種光固化複閤樹脂動態黏彈性對臨床操作性能的影響,以確定理想的光固化複閤樹脂應具備的條件.設計、時間及地點:結閤材料學基礎實驗和臨床應用的對比觀察.基礎實驗部分先期于2003-01在北京中國科學院(化學研究所)工程塑料國傢重點實驗室完成;臨床觀察部分在海南省海口市人民醫院口腔醫學中心完成,時間一直持續到2006-12.材料:光固化複閤樹脂包括含RF填料的實驗性複閤樹脂Ⅰ(experimental composite resin Ⅰ,ECR-Ⅰ)和含普通鋇玻璃填料的實驗性複閤樹脂Ⅱ(experimental compositeresin Ⅱ.ECR-Ⅱ),兩者填料含量的百分比(體積)相同,併含有相同的樹脂基質和光固化體繫,由北京大學口腔醫學院口腔材料研究室配製.方法:在室溫25℃條件下,採用平行闆動態應力流變儀DSR-200,分彆測試用RF填料彊化的未聚閤光固化複閤樹脂ECR-Ⅰ和用NF填料彊化的未聚閤光固化複閤樹脂ECR-Ⅱ的動態黏彈性.採用流動性、充填性、成形性和穩定性4箇指標評估兩種樹脂的臨床操作性能.主要觀察指標:兩種複閤樹脂的黏彈性質(G',G",tall δ)和臨床操作性能.結果:兩種樹脂的動態黏彈性對剪切率比較敏感,ECR-Ⅰ的貯能模量(G')明顯高于ECR-Ⅱ,臨床顯示ECR-Ⅰ有更好的穩定性和成形性,潛在變形小.ECR-Ⅱ的損耗模量(G")明顯高于ECR-Ⅰ,臨床顯示ECR-Ⅱ流動性更好.ECR-Ⅰ損耗角(tan δ)明顯低于ECR-Ⅱ,臨床顯示ECR-Ⅱ更多黏性行為,充填性更好,容易和牙齒上的洞壁貼閤.結論:對照兩種複閤樹脂的黏彈性質(G',G",tan δ)和臨床操作性能,理想的光固化複閤樹脂應有較高的貯能模量(G')和較低的損耗角(tan δ).
배경:진관대광고화수지적류변행위이유교다연구,단대광고화수지림상조작성능적평개지표,즉류동성、충전성、성형성화은정성,목전구강재료계환몰유통일적정의.목적:평개함고위성전료(retentive filler,RF전료)화보통전료(normal filler,NF전료)적미취합광고화복합수지적동태점탄성,병탐토량충광고화복합수지동태점탄성대림상조작성능적영향,이학정이상적광고화복합수지응구비적조건.설계、시간급지점:결합재료학기출실험화림상응용적대비관찰.기출실험부분선기우2003-01재북경중국과학원(화학연구소)공정소료국가중점실험실완성;림상관찰부분재해남성해구시인민의원구강의학중심완성,시간일직지속도2006-12.재료:광고화복합수지포괄함RF전료적실험성복합수지Ⅰ(experimental composite resin Ⅰ,ECR-Ⅰ)화함보통패파리전료적실험성복합수지Ⅱ(experimental compositeresin Ⅱ.ECR-Ⅱ),량자전료함량적백분비(체적)상동,병함유상동적수지기질화광고화체계,유북경대학구강의학원구강재료연구실배제.방법:재실온25℃조건하,채용평행판동태응력류변의DSR-200,분별측시용RF전료강화적미취합광고화복합수지ECR-Ⅰ화용NF전료강화적미취합광고화복합수지ECR-Ⅱ적동태점탄성.채용류동성、충전성、성형성화은정성4개지표평고량충수지적림상조작성능.주요관찰지표:량충복합수지적점탄성질(G',G",tall δ)화림상조작성능.결과:량충수지적동태점탄성대전절솔비교민감,ECR-Ⅰ적저능모량(G')명현고우ECR-Ⅱ,림상현시ECR-Ⅰ유경호적은정성화성형성,잠재변형소.ECR-Ⅱ적손모모량(G")명현고우ECR-Ⅰ,림상현시ECR-Ⅱ류동성경호.ECR-Ⅰ손모각(tan δ)명현저우ECR-Ⅱ,림상현시ECR-Ⅱ경다점성행위,충전성경호,용역화아치상적동벽첩합.결론:대조량충복합수지적점탄성질(G',G",tan δ)화림상조작성능,이상적광고화복합수지응유교고적저능모량(G')화교저적손모각(tan δ).
BACKGRoUND:The clinical manipulation properties of light-cured composite resin,such as flowing property.filling capacity,shaping and stability has not unified definition in dental materials notwithstanding more studies of rheological behaviors were undertook.OBJECTIVE:To explore the dynamic viscoelasticity difference of unpolymerized light.cured composite resins with retentive filler or normal filler,and to investigate effect on the clinical manipulation properties of rheological behaviors in two light-cured composite resins to define an ideal resin.DESIGN,TIME AND SETTING:This controlled study is a correlation study of integrating the base study and clinical use.Basic study was performed in January 2003 at Key Laboratory of Engineering Plastics of Chinese Academy of Sciences in Beijing.The clinical observation study was conducted at the Stomatology Center,Haikou People's Hospital until December 2006.MATERIALS:Light-cured composites employed in this study were reinforced with RF(experimental composite resin I,ECR-Ⅰ)or NF(experimental composite resin Ⅱ,ECR-Ⅱ),which were supplied by Dental Materials Laboratory.Medical College of Stomatology of Peking University.They contained different types of fillers,but had the same resin matrix and volume percent of filler.METHODS:The dynamic viscoelastic properties of ECR-Ⅰ or ECR-Ⅱ were measured respectively with the dynamic stress rheometer DSR-200 in a room maintained 25℃.Flowing property,filling capacity,shaping and stability property were employed to assess the clinical manipulation property of ECR.MAIN OUTCOME MEASURES:Viscoelasticity(G',G",tan δ)and clinical manipulation of two kinds of compound resins.RESULTS:The dynamic viscoelastic behavior of the two composites was sensitive to changes in frequency.ECR-Ⅰhad significantly higher G'than ECR-Ⅱ.ECR-Ⅰ had a greater ability of stability and shaping.and a lower potential for deformation clinically.ECR-Ⅱ had significantly higher G"than ECR-Ⅰ.and ECR-Ⅱ had a higher flowing ability clinically.ECR-Ⅱ had significantly higher tan δ than ECR-Ⅰ.ECR-Ⅱ was found to be more viscous and better filling capacity,with a good adaptation to the cavity of the tooth clinically.CONCLUSION:The dynamic viscoelasticity(G',G",tan δ)and clinical manipulation properties of ECR-ⅠI or ECR-Ⅱ are compared.The ideal composites should have higher G'and lower tan δ