The University of Tokyo · Dentistry
Professor Arata Ebihara's research lab specializes in endodontic biomechanics and dental imaging, focusing on the effects of rotary instruments on root canal treatment outcomes. The lab investigates root canal shaping techniques, file design, and thermal treatments to minimize root damage such as microcracks and strain. Advanced imaging modalities like contrast-enhanced micro-CT and SS-OCT are employed to noninvasively assess root integrity and early pathological changes. The lab also explores fluorescence-based diagnostics for detecting premalignant and malignant oral lesions.
Figures are computed from collected data and may differ slightly.
Based on these preliminary data, canal shaping appears to cause apical microcracks regardless of the type of rotary instrument motion. Contrast-enhanced micro-CT was able to identify microcracks in roots.
Light-induced fluorescence after ALA exposure can differentiate between the different stages of premalignancy and malignancy. Its ability to differentiate between healthy tissue and early pathology is particularly interesting
Heat treatment of files might improve their flexibility, making them more effective for preparation of curved canals.
SS-OCT may represent a novel, noninvasive, noncontact and nonexposure alternative to the conventional methods used for assessing root fractures in teeth.
Under laboratory conditions using JIZAI instruments, a rotational speed of 500 rpm generated significantly lower maximum screw-in forces and torque values than rotational speed of 300 rpm. Continuous rotation and OTR motion performed similarly in shaping the canals.
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