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Surface Integrity of Orthograde MTA Obturation Following Targeted Endodontic Microsurgery
[Technical Report, Master's Thesis]
UNIFORMED SERVICES UNIV OF THE HEALTH SCIENCES BETHESDA MD
Pagination or Media Count:
Introduction Guided endodontic microsurgery may be performed utilizing trephine burs for apical root resection. The purpose of this project was to determine if the use of trephine burs in Targeted Endodontic Microsurgery TEMs disrupts the MTA fill within the canal. Methods 20 maxillary anterior roots were cleaned, shaped, and obturated with MTA. Each root was secured in a custom surgical guide using polyvinylsiloxane material and fastened to a benchtop vice. With continuous water irrigation, roots were resected with either guided trephine burs or multipurpose burs. Resected root ends were analyzed using a dental operating microscope and light microscopy with various fluorescent filters and magnifications up to 40x. Results No groups had any detectable defects that could be identified by light microscopy analysis. No significant differences between the multipurpose group and the trephine group were observed. Conclusion Analysis of the samples supports the use of trephine burs in guided apical surgery when the root has previously been filled with MTA. No difference could be observed between the groups in regards to disrupting the MTA fill within the canal.
[A, Approved For Public Release]