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Study on Reinforced Composite Resin Restorations by Inserting with Spherical Megafillers

球形巨型填料植入增强复合树脂修复体的研究

基本信息

批准号：
10470422
负责人：
ISHIKAWA Akiko
金额：
$ 6.59万
依托单位：
Nippon Dental University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10470422/
关键词：
Composite Resin Megafiller Spherical zmegafiller Coefficient of Thermal Expansion Surface Gloss Clinical Evaluation of Composite Resin Composite Resin of physical properties 球状セラミックメガフィラー球状メガフィラー歯科用修復材歯科用コンポジットレジン

项目摘要

We have previously reported that the insertion of Beta Quartz Glass Ceramic inserts into a composite resin greatly reduced the polymerization shrinkage and the coefficient of thermal expansion in vitro. But, The megafiller has to be inserted completely inside the composite resin to avoid exposing megafiller on the surface of the restoration clinically. The purpose of this study was to determine the coefficient of thermal expansion of three different types of composite resins inserted with the spherical ceramic megaffiler (φ1 mm) of alumina or zirconia ceramics using a thermomechanical analyzer (Thermofirex, Rigaku Co.). Three cylindrical specimen (φ4 mm×10 mm) of each of the composite resins were prepared. The composite resins used in this study were Clearfil AP-P as highly loaded type composite, Palfique Estelite as submicrofilled composite and Heliomolar Rediopaque as microfilled composite. The specimen was kept in 37℃ water for 48 hours and dried in oven at 37℃. Once, the specimen g … More radually heated up to 90℃ and gradually cooled down to 20℃. Again, the specimen uniformly raised up to 90℃ in the thermomechanical analyzer. The coefficient of thermal expansion was measured at the range of 35℃〜80℃ with a straight line. Results are as follows. Clearfil AP-X with 10% alumina showed 25.3×10, 30% alumina was 23.3.×10, 50%-22.4×10, whereas 0% showed 36.7×10. Palfique Estelite with 10% alumina showed 54.8, 30%-49.2, 50%-43.4, whereas 0% showed 64.2. Heliomolar Radiopaque with 10% alumina showed 73.8, 30%-66.2, 50%-62.2, whereas 0% showed 76.0. Clearfil AP-X with 0% zirconia showed 36.7, 10%-57.3, 30%-43.0, 50%-33.4. Heliomolar Radiopaque with 0% zirconia showed 76.0, 10%-67.5, 30%-58.1, 50%-47.1. The coefficient of thermal expansion reduced as increasing amount of spherical ceramic megafillers, and zirconia ceramics was more effective than alumina ceramics. Surface gloss was measured using a gloss meter (VG-2000, Nippon Denshoku Co.). Surface gloss measurement was undertaken with 60 of the angle of incidence and 60 of the acceptance. Surface gloss of the composites were given as same as the gloss of composites without megafillers. When we applied clinically, we have no problem on the cavity deeper more than 1.5 mm. The cavity floor was laid thinner with composite resin paste beforehand. Several particles of megafillers sticked once at the tip of filling instrument inserted into the composite resin without use of tweezers. Megafillers treated with silance coupling agent well bonded to composite. It was concluded that the reinforced composite restoration by inserting with spherical ceramic magafillers was very useful clinically. Less

我们之前曾报道过，将β石英玻璃陶瓷插入复合树脂中可大大降低体外聚合收缩率和热膨胀系数。但是，临床上，为了避免大填充物暴露在修复体表面，大填充物必须完全插入复合树脂中。本研究的目的是使用热机械分析仪（Thermofirex，Rigaku Co.）测定插入氧化铝或氧化锆陶瓷的球形陶瓷megafiler（φ1 mm）的三种不同类型的复合树脂的热膨胀系数。制备三个圆柱形试样（φ4 mm×10 mm）。本研究中使用的复合树脂为Clearfil AP-P（高负载型复合树脂）、Palfique Estelite（亚微填充复合树脂）和Heliomolar Rediopaque（微填充复合树脂）。将样本在37℃水中保存48小时，并在37℃烘箱中干燥。一次，样本g ...更多信息逐渐升温至90℃，逐渐降温至20℃。再次，试样在热机械分析仪中均匀升高至90℃。在35℃ ~ 80℃范围内用直线测量热膨胀系数。结果如下。含10%氧化铝的Clearfil AP-X显示25.3×10，30%氧化铝为23.3 ×10，50%-22.4×10，而0%氧化铝显示36.7×10。具有10%氧化铝的Palfique Estelite显示54.8、30%-49.2、50%-43.4，而0%显示64.2。含10%氧化铝的太阳摩尔不透射线显示73.8、30%-66.2、50%-62.2，而0%显示76.0。含0%氧化锆的Clearfil AP-X显示36.7、10%-57.3、30%-43.0、50%-33.4。0%氧化锆的太阳摩尔不透射线显示76.0、10%-67.5、30%-58.1、50%-47.1。随着球形陶瓷填充剂用量的增加，热膨胀系数减小，氧化锆陶瓷的热膨胀效果优于氧化铝陶瓷。使用光泽度计（VG-2000，Nippon Denshoku Co.）测量表面光泽度。在60 °入射角和60 °接受角下进行表面光泽度测量。复合材料的表面光泽度与没有大填料的复合材料的光泽度相同。临床应用时，深1.5mm以上的洞均无问题，洞底事先用复合树脂糊剂铺薄。在未使用镊子的情况下，在插入复合树脂中的填充工具的尖端处粘有几个大填充剂颗粒。用硅烷偶联剂处理的大填料与复合材料结合良好。结论：球型陶瓷磁性充填体嵌体增强复合材料修复体具有良好的临床应用价值。少