Evaluation of Apical Microleakage in Open Apex Teeth Using MTA Apical Plug in Different Sessions

Abstract

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 μm. t-test revealed a significant difference between dye penetrations of two groups (P < 0.05). Conclusion. MTA requires adequate time for setting in the presence of the moisture, and final obturation should be delayed until final setting of MTA.

Efficacy of Mineral Trioxide Aggregate and Biodentine as Apical Barriers in Immature Permanent Teeth: A Microbiological Study

“…A few surveys showed MTA to have less microleakage than conventional materials. 4 Mineral trioxide aggregate has exceptional biocompatibility and sealing capability. 12 Moreover, it is less cytotoxic when compared to other materials currently used in pulpal therapy 12 and stimulates cementogenesis; 5 all these features make it a good option for apical barriers.…”

“…Retrograde placement of MTA and biodentine was done in the study as the leakage of the material does not depend on the delivery technique and instead depends on packing and adaptation of these materials to the dentinal walls. 4 Radiographs were taken after placing the biomaterials. This ensured the precision of placement and evaluated the thickness of the barrier at the apex in both the groups.…”

Mineral trioxide aggregate induces osteoblastogenesis via Atf6

“…Several studies have postulated microleakage of MTA from the root in endodontic treatment (Lawley et al, 2004, Yazdizadeh et al, 2013) and the other reported induction and/or acceleration of bone repair of MTA in vivo (Qin et al, 2010, Wu et al, 2013). These findings conducted us to explore molecular mechanism(s) of healing action of MTA for the resorbed alveolar bone due to endodontic infection.…”

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“…24 Butt N et al, 25 concluded in an In Vitro study that Bio dentine has superior sealing ability as apical plug compared to white MTA. 25 Mohammad Yazdizadeh et al, 26 showed in an In Vitro study that immediate obturation of the entire root canal after MTA apical plug leads to more leakage compared to 24 hours interval between apical plug placement and obturation by gutta-percha. 26 Therefore, MTA requires adequate time for setting in the presence of the moisture, and final obturation should be delayed until final MTA setting.…”

“…25 Mohammad Yazdizadeh et al, 26 showed in an In Vitro study that immediate obturation of the entire root canal after MTA apical plug leads to more leakage compared to 24 hours interval between apical plug placement and obturation by gutta-percha. 26 Therefore, MTA requires adequate time for setting in the presence of the moisture, and final obturation should be delayed until final MTA setting. In the other hand, Khalilak J et al, 4 showed in an In Vitro study that leakage of MTA apical plug using one-and two-step technique are comparable.…”