Gruber, Rudolf Matthias

[["dc.bibliographiccitation.firstpage","1057"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","The Angle Orthodontist"],["dc.bibliographiccitation.lastpage","1063"],["dc.bibliographiccitation.volume","81"],["dc.contributor.author","Hahn, Wolfram"],["dc.contributor.author","Engelke, Benjamin"],["dc.contributor.author","Jung, Klaus"],["dc.contributor.author","Dathe, Henning"],["dc.contributor.author","Kramer, Franz-Joseph"],["dc.contributor.author","Roedig, Tina"],["dc.contributor.author","Kubein-Meesenburg, Dietmar"],["dc.contributor.author","Gruber, Rudolf Matthias"],["dc.date.accessioned","2018-11-07T08:50:19Z"],["dc.date.available","2018-11-07T08:50:19Z"],["dc.date.issued","2011"],["dc.description.abstract","Objective: To determine the forces and moments delivered to a maxillary central incisor during rotation with aligners when a simulated occlusal force generated during swallowing acts on the appliance. Materials and Methods: Five identical appliances were manufactured from four different starting materials (Erkodur 0.8 mm and 1.0 mm; Biolon 0.75 mm and 1.0 mm). An upper central incisor fixed in a measuring device was rotated around its central axis in 0.5-degree steps up to +/- 10 degrees with the appliance fixed in place. An occlusal force of 30 N generated during swallowing was simulated with a weight positioned on the appliance. For statistical analysis, the moments Tz (rotation) and forces Fz (intrusion) at a deflection of +/- 0.34 mm to the incisor edge (+/- 5 degrees rotation) were tested. Means and standard deviations for Tz and median and 25% and 75% quartiles for Fz were calculated. An analysis of variance was performed. Results: The simulated occlusal force increased the measured intrusive force Fz (maximum with a weight, -3.7 N [-3.7, -2.4]; minimum without a weight, -1.3 N [-1.4, -1.1]) and the rotary moment Tz (maximum with a weight, -50.8 Nmm [+/- 0.8]; minimum without a weight, 18.2 Nmm [+/- 0.9]) significantly in all cases (P < .01). This was found for all materials measured and for both directions of rotation. Conclusion: During rotation with aligners, a simulated occlusal force increases the intrusive force and the rotary moment. The biological adverse side effects of these phenomena remain unclear, especially in patients with periods of bruxism. (Angle Orthod. 2011;81:1057-1063.)"],["dc.identifier.doi","10.2319/013111-62.1"],["dc.identifier.isi","000296484900019"],["dc.identifier.pmid","21612314"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8018"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/21669"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","E H Angle Education Research Foundation, Inc"],["dc.relation.issn","0003-3219"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","The influence of occlusal forces on force delivery properties of aligners during rotation of an upper central incisor"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","145"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","The Angle Orthodontist"],["dc.bibliographiccitation.lastpage","150"],["dc.bibliographiccitation.volume","82"],["dc.contributor.author","Fricke-Zech, Susanne"],["dc.contributor.author","Gruber, Rudolf Matthias"],["dc.contributor.author","Dullin, Christian"],["dc.contributor.author","Zapf, Antonia"],["dc.contributor.author","Kramer, Franz-Josef"],["dc.contributor.author","Kubein-Meesenburg, Dietmar"],["dc.contributor.author","Hahn, Wolfram"],["dc.date.accessioned","2018-11-07T09:15:56Z"],["dc.date.available","2018-11-07T09:15:56Z"],["dc.date.issued","2012"],["dc.description.abstract","Objective: To conduct a pilot study to investigate the potentiality to determine the midpalatal sutural width radiographically with a flat-panel volume computed tomography (fpVCT) in a porcine model. Materials and Methods: Bone samples from the midpalatal suture of five young (16 weeks) and five old (200 weeks) sus scrofa domestica were gathered. The midpalatal suture width was measured via fpVCT and compared to respective histological preparations. Results with P < .05 were considered significant. Results: The data obtained by fpVCT and by histomorphometric analysis reveal a highly significant age dependency of the measured suture width (both P < .0001), with lower suture width values in older subjects compared to the younger group. The averaged suture widths measured in the fpVCT images shows a distinctively higher mean compared to the histomorphometric data with high statistical significance (P < .0001). The evaluated difference between both methods was almost constant. Conclusion: fpVCT is a powerful tool for determining midpalatal sutural width. (Angle Orthod. 2012;82:145-150.)"],["dc.identifier.doi","10.2319/040311-238.1"],["dc.identifier.isi","000299136300022"],["dc.identifier.pmid","21812573"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9971"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/27819"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","E H Angle Education Research Foundation, Inc"],["dc.relation.issn","0003-3219"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Measurement of the midpalatal suture width A comparison of flat-panel volume computed tomography to histomorphometric analysis in a porcine model"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","272"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTOLOGY"],["dc.bibliographiccitation.lastpage","278"],["dc.bibliographiccitation.volume","107"],["dc.contributor.author","Hahn, Wolfram"],["dc.contributor.author","Fricke-Zech, Susanne"],["dc.contributor.author","Fricke, Julia"],["dc.contributor.author","Gruber, Rudolf Matthias"],["dc.contributor.author","Dullin, Christian"],["dc.contributor.author","Zapf, Antonia"],["dc.contributor.author","Hannig, Christian"],["dc.contributor.author","Kubein-Meesenburg, Dietmar"],["dc.contributor.author","Sadat-Khonsari, Reza"],["dc.date.accessioned","2018-11-07T08:33:16Z"],["dc.date.available","2018-11-07T08:33:16Z"],["dc.date.issued","2009"],["dc.description.abstract","Objective. Our aim was to evaluate the capacity of flat-panel volume computerized tomography (fpVCT) to enable the observer to detect and differentiate 3 different sizes of simulated tooth root defects in radiographs. Study design. Three simulated tooth root defects of different sizes and a defect-free area ( 160 sites in total) were randomly distributed on the buccal and lingual surface of 20 mandibular premolar roots of Sus scrofa domestica with round burs. For the imaging of the specimens, an fpVCT prototype was used. Findings were evaluated by 3 observers. Results. Cavity 0 ( no lesion) was correctly identified in 53%, cavity 1 in 69%, cavity 2 in 96%, and cavity 3 in 89%. Altogether, the simulated cavities were classified in a correct manner in 77%. The values were compared using receiver operating characteristic curves. The area under the curve (AUC) for cavity 0 versus the pooled results for cavities 1-3 was found to be 0.72. The AUC for the pooled results for 0-2 ( no pathologic impact) versus cavity 3 ( potential pathologic impact) was 0.94. There was no significant dependence of the results on the observer (P = .37). Results with P < .05 were considered to be significant. Conclusions. Flat-panel volume computerized tomography, which is currently used only as a research tool, has a high potential in detection and differentiation at an early stage of external root resorption cavities with pathologic relevance.. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2009; 107: 272-278)"],["dc.identifier.doi","10.1016/j.tripleo.2008.04.030"],["dc.identifier.isi","000262328100020"],["dc.identifier.pmid","18602316"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6122"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17534"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Mosby-elsevier"],["dc.relation.issn","1079-2104"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Detection and size differentiation of simulated tooth root defects using flat-panel volume computerized tomography (fpVCT)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]