A comparative study of selected physical properties of five root-canal sealers
A comparative study of selected physical properties of five root-canal sealers
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DOI：
10.1046/j.1365-2591.2003.00701.x
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发表时间：
2003-09-01
影响因子：
5
通讯作者：
Gulabivala, K
中科院分区：
文献类型：
--
作者：
McMichen, FRS;Pearson, G;Gulabivala, K
目的研究Roth 801（R）、Tubli-Seal EWT（R）、AH Plus（R）、Apexit（R）和Endion（R）根管封闭剂的溶解性、膜厚、流动性、工作时间和凝固时间。溶解度通过标准样品在3个月内在水中的重量变化来测量。膜厚度测量为含有标准量的明胶的称重载玻片之间的距离。通过单位时间后通过标准孔径的挤出速率来评估流动。将工作时间视为流速降低10%的点。结果AH Plus（R）在水中溶解性最差，而Apexit（R）在水中最不稳定。溶解度值按递增顺序为：AH Plus（R）< Tubli-Seal EWT（R）< Endion（R）< Apexit（R）。此外，AH Plus（R）具有最高的膜厚度。所有密封器均显示出相当的流速。工作时间从Endion（R）的50分钟到AH Plus（R）和Tubli-Seal EWT（R）的2小时以上不等。Tubli-Seal EWT（R）记录的凝固时间范围为70 min至Roth 801（R）记录的凝固时间范围为8天。结论1 AH Plus（R）在溶液中表现出最大的稳定性，Tubli-Seal EWT（R）表现良好，但Apexit（R）和Endion（R）具有更高的溶解度值。Tubli-Seal EWT（R）< Apexit（R）< Endion（R）= Roth 801（R）< AH Plus（R）。3所有封口机的流速相似。4所有封口机的工作时间均大于50分钟。5当以足以填充测试基质的体积进行孵育时，Roth 801（R）未凝固。
Aim To investigate selected physical properties of five root-canal sealers.Methodology The solubility, film thickness, flow, working and setting times of Roth 801(R) Tubli-Seal EWT(R) AH Plus(R), Apexit(R) and Endion(R) were evaluated. Solubility was measured by weight change of standard specimens in water over a 3-month period. Film thickness was measured as the distance between weighted glass slides containing a standard quantity of sealer. Flow was assessed by rate of sealer extrusion through a standard bore diameter, after unit time. Working time was taken as the point at which flow rate was reduced by 10%. The indentation test using a modified Gilmore needle was employed to investigate the setting times.Results AH Plus(R) was the least soluble, whilst Apexit(R) was the most unstable in water. The solubility values in increasing order were: AH Plus(R) < Tubli-Seal EWT(R) < Endion(R) < Apexit(R). Also, AH Plus(R) had the highest film thickness. All sealers showed comparable flow rates. The working time varied from 50 min for Endion(R) to over 2 h for AH Plus(R) and Tubli-Seal EWT(R). The range of setting times recorded was from 70 min for Tubli-Seal EWT(R) to 8 days for Roth 801(R).Conclusions1 AH Plus(R) showed the greatest stability in solution and Tubli-Seal EWT(R) performed well, but Apexit(R) and Endion(R) had higher solubility values.2 The film thickness values in increasing order were: Tubli-Seal EWT(R) < Apexit(R) < Endion(R) = Roth 801(R) < AH Plus(R).3 The flow rates for all sealers were similar.4 The working times for all sealers were greater than 50 min.5 Roth 801(R) did not set when incubated in volumes sufficient to fill the test matrices.