Effect of Rheological Properties of Resin Composite Pastes on Marginal Adaptation of the Restoration in Dentin Cavity

树脂复合糊剂流变性能对牙本质腔体修复体边缘适应的影响

• 批准号: 11671903
• 负责人: HASEGAWA Tokuji
• 金额: $ 2.18万
• 依托单位: Showa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11671903/
• 关键词: resin composite; dentin bonding; contraction stress; marginal adaptation; contraction gap; rheological propertiy; 歯質接着性; 窩洞辺縁適合性; 流動性

Marginal adaptation of eight commercially available resin composites, Clearfil APX, Estelite, Estio LC, Litefil IIA, Prodigy, Progress, Silux Plus and Z-100, were detemiined by measurement of the contraction gap width in a cylindrical dentin cavity. The cavity walls were treated with the experimental dentin bonding system consisting of 05M EDTA, 35% glyceryl mono-methacrylate solution and Clearfil Photo Bond. Three composites, Clearfil APX, Estelite and Silux Plus, prevented the contraction gap formation completely. There was not significantly deference (p>0.O5) between the gap width and tensile bond strength to flat dentin surface of the eight composites.The thixoiropy indexes [TI] of the eight composite pastes depending on a lime were detemiined by a cone and plate viscometry sensor system mounted in a Viscotester VT550.The composite pastes were stored, in 24+1C at least for 24 hours, and then transferred on the thermostatic plate senser at 37+1C. The TI at 10.68 s-1 of a shear rate correlated significantly (r2=0.822) with the measured gap width. Furthermore the yield strengths and thixotropy depending on a rotalive velocity of the eight composites were measured by a truncated cone and plate viscometry senser system mounted in a Rheosiress RS75.Condition of the composite pastes and plate senser were controlled as same as measuring of the TI. The TI of the eight composites correlated significantly (r2=0.757) with the measured gap width. The rheological properties of the composite pastes may predict the marginal adaptation of the polymerized composites in dentin cavity.

通过测量圆柱形牙本质腔内收缩间隙宽度来确定8种市购树脂复合材料的边际适应性，分别为Clearfil APX、Estelite、Estio LC、Litefil IIA、Prodigy、Progress、Silux Plus和Z-100。采用由05M EDTA、35%单甲基丙烯酸甘油酯溶液和Clearfil Photo Bond组成的实验牙本质键合体系对牙本质腔壁进行处理。Clearfil APX、Estelite和Silux Plus这三种复合材料完全阻止了收缩间隙的形成。8种复合材料的牙本质平面间隙宽度和抗拉结合强度差异不显著（p> . 0 0. 5）。通过安装在VT550粘度测试仪上的锥板粘度传感器系统测定了8种复合膏体的触变性指数[TI]。复合膏体在24+1C中保存至少24小时，然后在37+1C恒温板传感器上转移。10.68 s-1剪切速率下的TI与测量的间隙宽度呈显著相关（r2=0.822）。此外，通过安装在Rheosiress RS75上的截锥和平板粘度传感器系统测量了8种复合材料的屈服强度和触变性随转速的变化。复合膏体和平板传感器的条件控制与TI的测量一致。8种复合材料的TI与测量的间隙宽度呈显著相关（r2=0.757）。复合浆料的流变性能可以预测复合浆料在牙本质腔内的边缘适应性。

项目成果

Hasegawa T, Itoh K, Koike T, Yukitani W, Hisamitsu H, Wakumoto S, Fujishima A.: "Effect of mechanical properties of resin composites on the efficacy of the dentin bonding system."Operative Dentistry. 24. 323-330 (1999)

Hasekawa T、Itoh K、Koike T、Yukitani W、Hisamitsu H、Wakumoto S、Fujishima A.：“树脂复合材料的机械性能对牙本质粘合系统功效的影响。”手术牙科。

Hasegawa T, et al.: "Effect of mechanical propeities of resin composites on the efficacy of the dentin bonding system"Operative Dentistry. 24. 323-330 (1999)

Hasekawa T 等人：“树脂复合材料的机械性能对牙本质粘合系统功效的影响”《牙科手术》。

T. Hasegawa, K. Itoh, T. Koike, W. Yukitani, H. Hisamitsu, S. Wakumoto, A. Fujishima: "Effect of mechanical properties of resin composites on the efficacy of the dentin bonding systems"Operative Dentistry. 24. 323-330 (1999)

T. Hasekawa、K. Itoh、T. Koike、W. Yukitani、H. Hisamitsu、S. Wakumoto、A. Fujishima：“树脂复合材料的机械性能对牙本质粘合系统功效的影响”《牙科手术》。