McMichael Greer E, Primus Carolyn M, Opperman Lynne A
Department of Endodontics, Center for Craniofacial Research and Diagnosis, Texas A&M University Baylor College of Dentistry, Dallas, Texas.
Lake Erie College of Osteopathic Medicine, School of Dental Medicine, Bradenton, Florida.
J Endod. 2016 Apr;42(4):632-6. doi: 10.1016/j.joen.2015.12.012. Epub 2016 Feb 19.
The treatments for which mineral trioxide aggregate (MTA)-based materials can be used in dentistry are expanding. Smaller particle size and easier handling properties have allowed the advent of tricalcium silicate sealers including EndoSequence BC Sealer (Brasseler USA, Savannah, GA), QuickSet2 (Avalon Biomed, Bradenton, FL), NeoMTA Plus (Avalon Biomed), and MTA Fillapex (Angelus, Londrina, Brazil). The objective of this study was to measure the tubule penetration with these sealers using continuous wave (CW) and single-cone (SC) obturation techniques.
Eighty single-rooted teeth were randomly divided into 8 groups of 10 and obturated with 1 of the previously mentioned sealers mixed with trace amounts of rhodamine using either the CW or SC technique. Teeth were sectioned at 1 mm and 5 mm from the apex and examined under a confocal laser microscope. The percentage of sealer penetration and the maximum sealer penetration were measured.
The tricalcium silicate sealers penetrated tubules as deep as 2000 μm (2 mm). The percentage of sealer penetration was much higher 5 mm from the apex, with many specimens having 100% penetration for both SC and warm vertical techniques. MTA Fillapex, a resin-based sealer with less than 20% MTA particles, had significantly greater tubule penetration with a warm vertical technique versus the SC technique at the 1-mm level.
Within the limitations of this study, the CW and SC techniques produced similar tubule penetration at both the 1-mm and the 5-mm level with the tricalcium silicate sealers BC Sealer, QuickSet2, and NeoMTA Plus.
基于三氧化矿物凝聚体（MTA）的材料在牙科领域的应用范围正在不断扩大。更小的颗粒尺寸和更易于操作的特性促使了硅酸三钙封闭剂的出现，包括EndoSequence BC封闭剂（美国Brasseler公司，佐治亚州萨凡纳）、QuickSet2（佛罗里达州布雷登顿的Avalon Biomed公司）、NeoMTA Plus（Avalon Biomed公司）以及MTA Fillapex（巴西隆德里纳的Angelus公司）。本研究的目的是使用连续波（CW）和单锥（SC）充填技术来测量这些封闭剂的牙本质小管渗透情况。
80颗单根牙被随机分为8组，每组10颗，使用CW或SC技术，用上述封闭剂之一与微量罗丹明混合进行充填。在距根尖1毫米和5毫米处将牙齿切片，并在共聚焦激光显微镜下检查。测量封闭剂渗透的百分比和最大封闭剂渗透深度。
硅酸三钙封闭剂可渗透到2000微米（2毫米）深的牙本质小管。在距根尖5毫米处，封闭剂渗透的百分比要高得多，许多样本在SC和热垂直技术下的渗透率均为100%。MTA Fillapex是一种含MTA颗粒不到20%的树脂基封闭剂，在1毫米水平时，热垂直技术下其牙本质小管渗透率明显高于SC技术。
在本研究的局限性范围内，CW和SC技术在1毫米和5毫米水平时，使用硅酸三钙封闭剂BC封闭剂、QuickSet2和NeoMTA Plus所产生的牙本质小管渗透率相似。
