Yamaguchi S, Ishikawa I, Masunaga H, Matsue M, Matsue I
Nichidai Koko Kagaku. 1989 Sep;15(3):315-27.
Composite resin materials are now widely used for dental therapy. The purpose of this study was to clarify the effect of composite resins on gingiva and pulp in case of application of them for temporally splint in periodontal treatment. 60 teeth in 6 female dogs ranging between 1 and 2 years of age with healty teeth and gingiva were divieded to 4 groups; (1) 12 teeth, controls; (2) 12 teeth, self-cured composite resin (Clearfil F II, CF II); (3) 18 teeth, light-cured resin (Belfel LX, BLX), curing time 20 sec. and (4) 18 teeth, BLX, 40 sec., and then 48 class V composite resins were restored supragingivally. The experimental procedure were carried out for 5 days and 30 days. Histopathological observations of 60 teeth inclusive of controls were made by applying to specimens with Hematoxylin eosin staining. For the materials and time periods in this study it was found that; 1. Light-cured composite resin was superior to self-cured composite resin on handlings. 2. There were no significant differences in periodontium between the experimentals (BLX, CF II) and controls in 5 days. At the 30 days the histologic score showed more gingivitis for the experimental teeth than for the controls (BLX-40 greater than BLX-20 greater than CF II greater than Cont.). 3. At 5 days hyperemia occurred in some cases of experimentals (both BLX and CF II). The appearance of predentin and changes of odontblastic layer were observed slightly in 30 days. But there were no significant differences between BLX and CF II. 4. The result suggested that applying to composite resin materials for temporally splint, both gingiva and pulp have to be protected.
复合树脂材料目前广泛应用于牙科治疗。本研究的目的是阐明在牙周治疗中使用复合树脂进行临时夹板固定时，其对牙龈和牙髓的影响。选取6只年龄在1至2岁、牙齿和牙龈健康的雌性犬的60颗牙齿，分为4组：（1）12颗牙齿为对照组；（2）12颗牙齿，使用自凝复合树脂（Clearfil F II，CF II）；（3）18颗牙齿，使用光固化树脂（Belfel LX，BLX），固化时间20秒；（4）18颗牙齿，使用BLX，固化时间40秒，然后在龈上修复48颗V类复合树脂。实验过程进行5天和30天。对包括对照组在内的60颗牙齿进行苏木精伊红染色，制作组织病理学观察标本。对于本研究中的材料和时间段，发现：1. 光固化复合树脂在操作性能上优于自凝复合树脂。2. 在5天时，实验组（BLX、CF II）与对照组在牙周组织方面无显著差异。在30天时，组织学评分显示实验组牙齿的牙龈炎比对照组更严重（BLX - 40大于BLX - 20大于CF II大于对照组）。3. 在5天时，实验组（BLX和CF II）的一些病例出现充血。在30天时，轻微观察到前期牙本质的出现和成牙本质细胞层的变化。但BLX和CF II之间无显著差异。4. 结果表明，在使用复合树脂材料进行临时夹板固定时，牙龈和牙髓都必须得到保护。
