Agrawal Pratik, Garg Gaurav, Bavabeedu Shashit S, Arora Suraj, Moyin Shabna, Punathil Sameer
Department of Conservative Dentistry and Endodontics, Kalinga Institute of Dental Sciences, KIIT Deemed to be University, Bhubaneswar, Odisha, India, Phone: +918018043808, e-mail:
Department of Restorative Dental Sciences, College of Dentistry, King Khalid University, Abha, Kingdom of Saudi Arabia.
J Contemp Dent Pract. 2018 Dec 1;19(12):1463-1468.
This study aimed to evaluate the efficacy of Intracanal calcium hydroxide removal with different techniques.
Seventy-five freshly extracted, non-carious, single canalled lower first premolars, having anatomic characteristics similar to each other, extracted for the orthodontic purpose were collected. After the root canal preparation, Calcium hydroxide was placed into the working length using lentulo spiral instrument till the medicament was visible at the apex. The specimens were segregated into three groups; Group 1: Rotary Files, Group 2: EndoVac system and Group 3: Ultrasonics. The evaluation was done with SEM in the coronal and apical third of the roots with a magnification of 1000x. The statistical analysis was done using statistical packages for social sciences (SPSS) software, version 20.0 for Windows (SPSS Inc., Chicago, IL). A p-value of less than 0.05 was considered significant statistically.
Maximum removal of Ca(OH) was analyzed in the EndoVac system (2.90 ± 0.12) followed by the rotary files (1.76 ± 0.26) and least was seen with Ultrasonics (1.32 ± 0.14). The p-value of 0.001 was seen between the coronal and apical third with the EndoVac system which is statistically significant. The significant difference statistically was observed between Rotary Files vs. Ultrasonics at apical third and with the EndoVac system vs. Ultrasonics at coronal third as well as at the apical third with p-value 0.001.
It can be concluded that the EndoVac technique was effective in removing Ca(OH) medicament from the coronal and apical third of the root canal significantly.
Calcium hydroxide removal before the obturation was of priority as the Ca(OH) remnants have a negative impact of the ability for sealing the obturation material. Therefore, having a complete knowledge regarding the effective technique is much important.
本研究旨在评估采用不同技术去除根管内氢氧化钙的效果。
收集75颗因正畸需要拔除的新鲜拔除、无龋坏、单根管的下颌第一前磨牙，这些牙齿的解剖特征彼此相似。根管预备后，使用螺旋输送器将氢氧化钙放入工作长度，直至药物在根尖可见。将标本分为三组；第1组：旋转锉，第2组：EndoVac系统，第3组：超声。使用扫描电子显微镜在放大1000倍的情况下对牙根的冠部和根尖三分之一进行评估。使用社会科学统计软件包（SPSS）Windows版20.0（SPSS公司，伊利诺伊州芝加哥）进行统计分析。p值小于0.05被认为具有统计学意义。
EndoVac系统中氢氧化钙的去除量最大（2.90±0.12），其次是旋转锉（1.76±0.26），超声去除量最少（1.32±0.14）。EndoVac系统在冠部和根尖三分之一之间的p值为0.001，具有统计学意义。在根尖三分之一处，旋转锉与超声之间以及在冠部三分之一和根尖三分之一处，EndoVac系统与超声之间的p值均为0.001，具有统计学显著差异。
可以得出结论，EndoVac技术能有效去除根管冠部和根尖三分之一的氢氧化钙药物。
在根管充填前去除氢氧化钙至关重要，因为氢氧化钙残留对封闭充填材料的能力有负面影响。因此，全面了解有效的技术非常重要。
