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Einfluss des Feuchtigkeitsgehalts des Wurzelkanaldentins auf die Entstehung und den Nachweis von Mikrorissen - Eine Mikro-Computertomografie-Studie

dc.contributor.advisorRödig, Tina Prof. Dr.
dc.contributor.authorMüller, Christine
dc.date.accessioned2020-06-09T12:51:09Z
dc.date.available2020-06-29T22:50:04Z
dc.date.issued2020-06-09
dc.identifier.urihttp://hdl.handle.net/21.11130/00-1735-0000-0005-13CC-0
dc.identifier.urihttp://dx.doi.org/10.53846/goediss-8002
dc.identifier.urihttp://dx.doi.org/10.53846/goediss-8002
dc.language.isodeude
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.ddc610de
dc.titleEinfluss des Feuchtigkeitsgehalts des Wurzelkanaldentins auf die Entstehung und den Nachweis von Mikrorissen - Eine Mikro-Computertomografie-Studiede
dc.typedoctoralThesisde
dc.title.translatedMoisture content of root canal dentin affects detection of microcracks using micro-computed tomographyde
dc.contributor.refereeRödig, Tina Prof. Dr.
dc.date.examination2020-06-22
dc.description.abstractengAim: This study aimed to evaluate the effect of moisture content of root canal dentin on detection of microcracks using micro-computed tomography. Methods: Ten roots with and without craze lines or cracks (each n = 5) were selected and scanned six times with different moisture conditions of root dentin using a micro-CT scanner at high resolution of 10.5 µm. Scanning conditions were as follows: 1. after 30 d wet storage, 2. after 2 h dry time, 3. after 48 h wet storage, 4. after 24 h dry time, 5. after 48 h wet storage, 6. after 2 h dry time. From each scan, cross-sectional images were obtained at intervals of 1 mm (total n = 708) and evaluated for the presence of dentinal microcracks twice by 5 calibrated blinded observers. Statistical analysis was performed by nonparametric analysis of variance (P < .05). Results: No significant differences between all wet groups as well as between both groups with 2 h dry time were detected (P > .05). Almost no cracks were observed after wet storage with a significant increase of cracks after 2 h dry time (P < .05). Significantly more microcracks were identified after 24 h than after 2 h dry time (P < .05). Conclusions: Moisture content of dentin influences detection of microcracks using micro-CT. Scanning should be performed on dried specimens to allow reliable identification of dentinal defects. Formation of new cracks during dry periods up to 24 h was disproved.de
dc.contributor.coRefereeRinke, Sven Pd Dr.
dc.contributor.thirdRefereeMausberg, Rainer Prof. Dr.
dc.subject.gerWurzelkanaldentinde
dc.subject.gerMikrorissede
dc.subject.gerFeuchtigkeitsgehaltde
dc.subject.gerMikro-Computertomografiede
dc.subject.engDentinal microcracksde
dc.subject.engmicro-computed tomographyde
dc.subject.engmoisture contentde
dc.subject.engroot canal dentinde
dc.identifier.urnurn:nbn:de:gbv:7-21.11130/00-1735-0000-0005-13CC-0-4
dc.affiliation.instituteMedizinische Fakultätde
dc.subject.gokfullMedizin (PPN619874732)de
dc.description.embargoed2020-06-29
dc.identifier.ppn1700287664


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