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

Müller, Christine

dc.contributor.advisor	Rödig, Tina Prof. Dr.
dc.contributor.author	Müller, Christine
dc.date.accessioned	2020-06-09T12:51:09Z
dc.date.available	2020-06-29T22:50:04Z
dc.date.issued	2020-06-09
dc.identifier.uri	http://hdl.handle.net/21.11130/00-1735-0000-0005-13CC-0
dc.identifier.uri	http://dx.doi.org/10.53846/goediss-8002
dc.identifier.uri	http://dx.doi.org/10.53846/goediss-8002
dc.language.iso	deu	de
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.ddc	610	de
dc.title	Einfluss des Feuchtigkeitsgehalts des Wurzelkanaldentins auf die Entstehung und den Nachweis von Mikrorissen - Eine Mikro-Computertomografie-Studie	de
dc.type	doctoralThesis	de
dc.title.translated	Moisture content of root canal dentin affects detection of microcracks using micro-computed tomography	de
dc.contributor.referee	Rödig, Tina Prof. Dr.
dc.date.examination	2020-06-22
dc.description.abstracteng	Aim: 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.coReferee	Rinke, Sven PD Dr.
dc.contributor.thirdReferee	Mausberg, Rainer Prof. Dr.
dc.subject.ger	Wurzelkanaldentin	de
dc.subject.ger	Mikrorisse	de
dc.subject.ger	Feuchtigkeitsgehalt	de
dc.subject.ger	Mikro-Computertomografie	de
dc.subject.eng	Dentinal microcracks	de
dc.subject.eng	micro-computed tomography	de
dc.subject.eng	moisture content	de
dc.subject.eng	root canal dentin	de
dc.identifier.urn	urn:nbn:de:gbv:7-21.11130/00-1735-0000-0005-13CC-0-4
dc.affiliation.institute	Medizinische Fakultät	de
dc.subject.gokfull	Medizin (PPN619874732)	de
dc.description.embargoed	2020-06-29
dc.identifier.ppn	1700287664

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Human- und Zahnmedizin [2871]

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