Srivastava Aastha Arora, Srivastava Harshit, Prasad Ashwini B, Raisingani Deepak, Soni Dileep
Senior Lecturer, Department of Conservative Dentistry & Endodontics, Mahatma Gandhi Dental College & Hospital , Jaipur, Rajasthan, India .
Reader, Department of Conservative Dentistry & Endodontics, Mahatma Gandhi Dental College & Hospital , Jaipur, Rajasthan, India .
J Clin Diagn Res. 2016 Jun;10(6):ZC43-6. doi: 10.7860/JCDR/2016/18296.7985. Epub 2016 Jun 1.
Teeth with immature apex are managed by establishing an apical plug using various materials and techniques. However, the use of previously placed intracanal medicament may affect the sealing ability of permanent filling material used as an apical plug.
To evaluate the effect of removal of previously placed Calcium Hydroxide, Chlorhexidine Digluconate and Camphorated Monochlorophenol as an intracanal medicament on the sealing ability of the Biodentine as an apical plug.
A total of 72 recently extracted human permanent teeth with single root were selected and stored in saline at room temperature. The crown portion of each tooth was removed at the level of cemento enamel junction; 14mm root length was taken as standard length. All the roots were submerged in 20% sulphuric acid up to 3 mm from the apex, for four days for root resorption. One sample was cut longitudinally to look for root resorption under stereo microscope. The canal preparation was done; the roots were kept in moist gauze after instrumentation. A total of 71 roots were randomly divided into three groups. GROUP 1:Calcium hydroxide paste, GROUP 2: Chlorhexidine digluconate, GROUP 3: Camphorated Monochlorophenol (CMCP). The medicaments were removed with stainless steel hand files and 0.5% sodium hypochlorite irrigation. After removal of medicament Biodentine was placed in apical third of resorbed roots and the remaining portion of the canals was filled with gutta-percha. All the 71 roots were analysed with fluid filtration method for evaluating microleakage.
Comparing all the three groups statistically there was no significant difference. The mean values were found more for group 1 followed by group 2 & 3.
All the groups showed microleakage. Calcium hydroxide showed the maximum microleakage followed by Chlorhexidine digluconate and least with CMCP.
根尖未发育成熟的牙齿通过使用各种材料和技术建立根尖屏障来进行处理。然而，先前放置的根管内药物的使用可能会影响用作根尖屏障的永久性充填材料的封闭能力。
评估去除先前放置的氢氧化钙、葡萄糖酸氯己定和樟脑对氯苯酚作为根管内药物对BioDentine作为根尖屏障的封闭能力的影响。
总共选择72颗近期拔除的单根人恒牙，室温下保存在盐水中。每颗牙齿的冠部在牙骨质釉质交界处水平切除；以14mm的根长作为标准长度。所有牙根从根尖向上3mm处浸入20%硫酸中4天以进行牙根吸收。纵向切开一个样本在体视显微镜下观察牙根吸收情况。进行根管预备；预备后将牙根保存在湿纱布中。总共71个牙根随机分为三组。第1组：氢氧化钙糊剂，第2组：葡萄糖酸氯己定，第3组：樟脑对氯苯酚（CMCP）。用不锈钢手用锉和0.5%次氯酸钠冲洗去除药物。去除药物后，将BioDentine放置在吸收后的牙根根尖三分之一处，根管其余部分用牙胶充填。所有71个牙根采用流体过滤法分析以评估微渗漏情况。
三组之间进行统计学比较无显著差异。第1组平均值最高，其次是第2组和第3组。
所有组均显示有微渗漏。氢氧化钙显示的微渗漏最大，其次是葡萄糖酸氯己定，CMCP显示的微渗漏最少。
