%0 Journal Article
%T Evaluation of Apical Microleakage in Open Apex Teeth Using MTA Apical Plug in Different Sessions
%A Mohammad Yazdizadeh
%A Zeinab Bouzarjomehri
%A Navid Khalighinejad
%A Leyli Sadri
%J ISRN Dentistry
%D 2013
%R 10.1155/2013/959813
%X Aim. To compare microleakage of apexification using MTA in one or two sessions. Materials and Methods. 88 single rooted teeth were prepared and divided into two groups then received MTA apical plug. In the first group, the teeth were immersed in normal saline for 24 hours and then backfilled with guttapercha and AH26 sealer. In the second group, the teeth were obturated immediately after receiving apical plug. Four positive and four negative controls were selected. All specimens were placed in 1% methylene blue and decalcified in 5% nitric acid and finally were placed in methyl salicylate until getting transparent. All teeth were visualized for assessment of dye penetration under stereo dissecting microscope. Results. 36 and 35 teeth showed dye leakage in the first and second groups. Dye penetration into the entire canal length was confirmed in the positive control group, and in the negative control group no dye penetration was seen. Mean dye penetration in the first and second group was 5813 and 9152£¿¦Ìm. -test revealed a significant difference between dye penetrations of two groups ( ). Conclusion. MTA requires adequate time for setting in the presence of the moisture, and final obturation should be delayed until final setting of MTA. 1. Introduction The presence of vital pulp is essential for root development. Therefore, when the pulp is reversibly inflamed it is crucial to maintain pulp vitality [1]. Caries and traumas are the main cause of pulp necrosis. If these occur prior to root maturation, the root development would be halted, and it can lead to an open apex tooth [2]. One of the main treatment methods of nonvital open apex teeth is apexification [3]. For many years calcium hydroxide (CaOH) has been the first choice of an intra canal dressing in apexification [4]; however, some drawbacks like coronal micro-leakage, tooth susceptibility to fracture [5], and multisession treatments [2, 6, 7] made clinicians look for an appropriate alternative for CaOH. It has been suggested that MTA plugs are more convenient and efficient compared to traditional CaOH [8]. MTA is used in different clinical cases in dentistry including direct pulp cap, internal resorption treatment, perforation management, and root canal filling [3]. Also MTA is used for pulpotomy in primary dentition [9¨C11]. One of the most interesting aspects of pulp-capping studies is utilizing this material for pulp treatment. It has been shown that MTA stimulates natural dentin repair at pulpal exposure sites during direct pulp cap [9]. It was declared that MTA can prevent the micro-leakage
%U http://www.hindawi.com/journals/isrn.dentistry/2013/959813/