Basic ResearchComparative Analysis of Calcium Silicate–based Root Filling Materials Using an Open Apex Model
Section snippets
Sample Preparation
Sixty freshly extracted human maxillary molars were used under a protocol approved by the Institutional Review Board of Texas A&M University Baylor College of Dentistry, Dallas, TX. Teeth were analyzed under 4× magnification (Zeiss, Oberkochen, Germany), and those containing root fractures or missing root tips were excluded. The palatal root was obtained by sectioning each tooth at the level of furcation. Each root was wrapped in moist gauze to prevent desiccation. Cleaning and shaping of the
Qualitative Evaluation of the Marginal Adaption of Root Filling Materials
Representative scanning electron microscopic photomicrographs of the root end after orthograde obturation with different materials, and root sections 3 mm from the apex are shown in Figure 3. The distribution of scores for each group is shown in Table 1. There were no significant differences (P = .175) between the 4 experimental groups in the quality of marginal adaptation of the root filling material at the level of the anatomic apex. The interclass correlation coefficient yielded a weighted
Discussion
Nonsurgical endodontic treatment of necrotic immature permanent teeth is challenging for the clinician because of the lack of resistance and retention form associated with a blunderbuss apex. Recent studies have reported successful long-term clinical outcomes associated with MTA apexification procedures 1, 2, 3. Although the quality of marginal adaptation does not necessarily correlate with clinical success, it has been established as an appropriate proxy to evaluate sealability and resistance
Conclusion
Within the parameters of this in vitro study, it can be concluded that for treatment of teeth with open apices requiring orthograde delivery of an apical barrier, there is no statistically significant difference in the quality of marginal adaptation at the level of the anatomic apex between the 3 materials evaluated. At a level 3 mm coronal to the apex, the application of BC Sealer to the canal walls before orthograde delivery of BC RRM-Fast Set Putty significantly enhanced its adaptation to
Acknowledgments
Supported by a resident research grant from the American Association of Endodontists Foundation.
The authors deny any conflicts of interest related to this study.
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