Kaka Hala B, Salman Raid F
Department of Conservative Dentistry, College of Dentistry, Hawler Medical University, Erbil44001, Iraq.
Department of Conservative Dentistry, Endodontics, College of Dentistry, Hawler Medical University, Erbil44001, Iraq.
Asian Biomed (Res Rev News). 2021 Feb 21;15(1):19-26. doi: 10.1515/abm-2021-0003. eCollection 2021 Feb.
Three-dimensional obturation of the root canal system is mandatory for a successful root canal treatment. Using a filling material with optimal properties may enable the root canal to be sealed well and therefore obtain the desired obturation.
To develop a new injectable paste endodontic filling material using calcium phosphate powder and a styrene-butadiene emulsion polymer.
The powder phase comprised an equivalent molar ratio of tetracalcium phosphate, anhydrous dicalcium phosphate, bismuth oxide, and calcium chloride. The liquid phase comprised a styrene-butadiene rubber emulsion in distilled water. The powder and the liquid were mixed to achieve a paste consistency. The paste was subjected to various tests including flow, setting time, dimensional change, solubility, and radiopacity to indicate its suitability as a root canal filling material. All these tests were conducted according to the American National Standards Institute-American Dental Association for endodontic sealing materials. After passing these tests, the paste was submitted to an injectability test.
The material showed acceptable flowability with 19.1 ± 1.3 min setting time and 0.61 ± 0.16% shrinkage after 30 days of storage. We found the highest solubility at 24 h (6.62 ± 0.58%), then the solubility decreased to 1.09 ± 0.08% within 3 days. The material was more radiopaque than a 3 mm step on an aluminum wedge. Furthermore, the material showed good injectability of 93.67 ± 1.80%.
The calcium phosphate powder in styrene-butadiene emulsion met basic requirements for a root canal filling material with promising properties.
根管系统的三维充填对于成功的根管治疗是必不可少的。使用具有最佳性能的充填材料可使根管得到良好密封，从而获得理想的充填效果。
使用磷酸钙粉末和丁苯橡胶乳液聚合物研制一种新型可注射糊剂根管充填材料。
粉末相由磷酸四钙、无水磷酸二钙、氧化铋和氯化钙按等摩尔比组成。液相由蒸馏水中的丁苯橡胶乳液组成。将粉末和液体混合以达到糊剂稠度。对该糊剂进行了包括流动性、凝固时间、尺寸变化、溶解度和射线不透性等各种测试，以表明其作为根管充填材料的适用性。所有这些测试均按照美国国家标准学会-美国牙科协会对根管封闭材料的标准进行。通过这些测试后，对该糊剂进行了可注射性测试。
该材料表现出可接受的流动性，凝固时间为19.1±1.3分钟，储存30天后收缩率为0.61±0.16%。我们发现其在24小时时溶解度最高（6.62±0.58%），然后在3天内溶解度降至1.09±0.08%。该材料的射线不透性比铝楔上3毫米的台阶更高。此外，该材料表现出良好的可注射性，为93.67±1.80%。
丁苯橡胶乳液中的磷酸钙粉末满足了作为根管充填材料的基本要求，具有良好的性能前景。
