Dathe, Henning

[["dc.bibliographiccitation.firstpage","45"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","ACTA OF BIOENGINEERING AND BIOMECHANICS"],["dc.bibliographiccitation.lastpage","53"],["dc.bibliographiccitation.volume","17"],["dc.contributor.author","Naegerl, Hans"],["dc.contributor.author","Dathe, Henning"],["dc.contributor.author","Fiedler, Christoph"],["dc.contributor.author","Gowers, Luiko"],["dc.contributor.author","Kirsch, Stephanie"],["dc.contributor.author","Kubein-Meesenburg, Dietmar"],["dc.contributor.author","Dumont, Clemens"],["dc.contributor.author","Wachowski, Martin Michael"],["dc.date.accessioned","2018-11-07T10:03:03Z"],["dc.date.available","2018-11-07T10:03:03Z"],["dc.date.issued","2015"],["dc.description.abstract","Purpose: In comparative examinations of kinematics of the knees of humans and pigs in flexional/extensional motion under compressive loads, the significant differential geometric essentials of articular guidance are elaborated to criticise the shaping of the articular surfaces of conventional knee-endoprostheses and to suggest constructional outlines that allow the endoprosthesis to adopt natural knee kinematics. Implantation is discussed with regard to the remaining ligamentous apparatus. Methods: Twelve fresh pig knee joints and 19 preserved human knee joints were moved into several flexional/extensional positions. In each joint, the tibia and femur were repeatably caught by metal plates. After removing all ligaments, the tibia and femur were again caught in these positions, and their points of contact were marked on both articular surfaces. Along the marker points, a thin lead wire was glued onto each surface. The positions and shapes of the four contact lines were mapped by teleradiography. Results: All contact lines were found to be plane curves. The medial and lateral planes were parallel, thus defining the joint's sagittal plane. In the human knee, as compared to the lateral, the medial femoral contact line was always shifted anteriorly by several millimetres. The tibial contact curve was laterally convex and medially concave. In the pig knees, the lateral and medial contact lines were asymmetrically placed. Both tibial curves were convex. Conclusions: Both knees represent cam mechanisms (with one degree of freedom) that produce rolling of the articular surfaces during the stance phase. Implantation requires preservation of the anterior cruciate ligament, and ligamentous balancing is disadvantageous"],["dc.identifier.doi","10.5277/ABB-00119-2014-02"],["dc.identifier.isi","000359730600005"],["dc.identifier.pmid","26400423"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38364"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wroclaw Univ Technology"],["dc.relation.issn","1509-409X"],["dc.title","The morphology of the articular surfaces of biological knee joints provides essential guidance for the construction of functional knee endoprostheses"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","12.e1"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","American Journal of Orthodontics and Dentofacial Orthopedics"],["dc.bibliographiccitation.volume","136"],["dc.contributor.author","Hahn, Wolfram"],["dc.contributor.author","Dathe, Henning"],["dc.contributor.author","Fialka-Fricke, Julia"],["dc.contributor.author","Fricke-Zech, Susanne"],["dc.contributor.author","Zapf, Antonia"],["dc.contributor.author","Kubein-Meesenburg, Dietmar"],["dc.contributor.author","Sadat-Khonsari, Reza"],["dc.date.accessioned","2018-11-07T08:27:52Z"],["dc.date.available","2018-11-07T08:27:52Z"],["dc.date.issued","2009"],["dc.description.abstract","Introduction: The aim of the study was to quantify the forces delivered by thermoplastic appliances made of 2 materials with 2 thicknesses to a maxillary central incisor during tipping. Methods: Two materials were tested, each in 2 thicknesses: Erkodur (Erkodent Erich Kopp GmbH, Pfalzgrafenweiler, Germany) 1.0 and 0.8 mm, and Biolon (Dreve Dentamid GmbH, Unna, Germany), 1.0 and 0.75 mm. For each material, 5 appliances were produced. To measure the forces applied, an isolated measuring tooth, part of a standardized resin model, was deflected in 0.05 degrees steps from 0 degrees to 0.42 degrees in the vestibular and palatine directions, after placing the respective appliance on the model. For statistical analysis, the force components Fx/tipping and Fz/intrusion at a displacement of +/- 0.151 mm from the incisor edge were selected. Means and standard deviations were calculated. The Wilcoxon 2-sample test for group pairings was used. Results: The norms for the mean Fx forces ranged from 1.62 (SD, 0.41) to 5.35 N (SD, 0.63). The mean Fz forces were between 0.07 (SD, 0.13) and -2.47 N (SD, 0.34). The highest intrusive forces were measured during vestibular displacement of the measuring tooth. The forces delivered by the thick appliances were overall significantly higher (P < 0.0001) than those of the thin materials. The forces delivered by the Biolon appliances were generally significantly higher (P < 0.0001) than those for the Erkodur materials. Conclusions: The forces applied were mostly too high when compared with those stated in the literature as ideal. In addition to thickness, the thermoforming process influences the magnitude of the force delivered by a thermoformed appliance. (Am J Orthod Dentofacial Orthop 2009; 136: 12.e1-12.e7)"],["dc.identifier.doi","10.1016/j.ajodo.2008.12.015"],["dc.identifier.isi","000267695500009"],["dc.identifier.pmid","19577136"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/16295"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Mosby-elsevier"],["dc.relation.issn","0889-5406"],["dc.title","Influence of thermoplastic appliance thickness on the magnitude of force delivered to a maxillary central incisor during tipping"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","176"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Der Unfallchirurg"],["dc.bibliographiccitation.lastpage","184"],["dc.bibliographiccitation.volume","112"],["dc.contributor.author","Frosch, Karl-Heinz"],["dc.contributor.author","Naegerl, H."],["dc.contributor.author","Kubein-Meesenburg, Dietmar"],["dc.contributor.author","Doerner, Jochen"],["dc.contributor.author","Dathe, H."],["dc.contributor.author","Hellerer, O."],["dc.contributor.author","Dumont, C."],["dc.contributor.author","Stuermer, Klaus-Michael"],["dc.date.accessioned","2018-11-07T08:33:22Z"],["dc.date.available","2018-11-07T08:33:22Z"],["dc.date.issued","2009"],["dc.description.abstract","The human medial tibial plateau is concave, whereas the lateral tibial plateau is convex. In a normal knee, the convex femoral condyles roll and glide on the tibia during the standing phase of walking. The designs of most commercially available knee prostheses do not take this morphological feature into consideration. The novel design of the AEQUOS G1 knee replacement prosthesis is based on the natural anatomy of the knee joint, with a convex lateral tibia plateau and a sagittal offset of the medial and lateral compartments. Following extensive development and testing, initial clinical results of the AEQUOS G1 prosthesis in a mulitcenter study are presented. From Mai 2005 to March 2007, 158 patients in 4 clinics underwent total knee arthroplasty with the AEQUOS G1 and agreed to participate in the study. Patients were evaluated preoperatively and at 3, 6 and 12 months of follow-up using a standardized protocol that included the American Knee Society Score (AKSS), the Oxford Knee Score (OKS) and the Visual Analog Scale (VAS) for pain. After 3 months, 151 patients appeared for follow up appointments, after 6 months, 134, and after 12 months, 127. The mean range of motion preoperatively was 97.0A degrees (+/- 19.9A degrees) and 107.5A degrees (+/- 15.9A degrees) 12 months after surgery. The AKSS, as well as the modified OKS, significantly improved (p < 0.0001) from preoperative scores of 98.8 (+/- 35.8) and 37.3 (+/- 6.9) points, respectively, to 165.8 (+/- 34.1) and 21.9 (+/- 7.8) points, preoperatively, and 12 months postoperatively. The VAS score significantly decreased (p < 0.001) from 7.4 (+/- 1.8) points preoperatively to 1.9 (+/- 2.2) points 12 months postoperatively. One implant was revised because of arthrofibrosis and another due to patellar luxation. Two patients required revision because their implants revealed malalignement with ligamentous instability. No infections, aseptic loosening or other implant-specific complications were observed at this early follow-up. Good clinical results were observed at early follow-up with the AEQUOS G1 knee arthroplasty. However, longer follow-up is necessary for a general evaluation of the implant."],["dc.identifier.doi","10.1007/s00113-008-1551-4"],["dc.identifier.isi","000263300400006"],["dc.identifier.pmid","19212737"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17560"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0177-5537"],["dc.title","A new total knee arthroplasty with physiologically shaped surfaces Part 2: First clinical results"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","103"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","ACTA OF BIOENGINEERING AND BIOMECHANICS"],["dc.bibliographiccitation.lastpage","110"],["dc.bibliographiccitation.volume","18"],["dc.contributor.author","Dathe, Henning"],["dc.contributor.author","Dumont, Clemens"],["dc.contributor.author","Perplies, Rainer"],["dc.contributor.author","Fanghaenel, Jochen"],["dc.contributor.author","Kubein-Meesenburg, Dietmar"],["dc.contributor.author","Naegerl, Hans"],["dc.contributor.author","Wachowski, Martin Michael"],["dc.date.accessioned","2018-11-07T10:20:13Z"],["dc.date.available","2018-11-07T10:20:13Z"],["dc.date.issued","2016"],["dc.description.abstract","Purpose: The purpose is to present a mathematical model of the function of the thumb carpometacarpal joint (TCMCJ) based on measurements of human joints. In the TCMCJ both articulating surfaces are saddle-shaped. The aim was to geometrically survey the shapes of the articulating surfaces using precise replicas of 28 TCMCJs. Methods: None of these 56 articulating surfaces did mathematically extend the differential geometrical neighbourhood around the main saddle point so that each surface could be characterised by three main parameters: the two extreme radii of curvature in the main saddle point and the angle between the saddles' asymptotics (straight lines). Results: The articulating surfaces, when contacting at the respective main saddle points, are incongruent. Hence, the TCMCJ has functionally five kinematical degrees of freedom (DOF); two DOF belong to flexion/extension, two to ab-/adduction. These four DOF are controlled by the muscular apparatus. The fifth DOF, axial rotation, cannot be adjusted but stabilized by the muscular apparatus so that physiologically under compressive load axial rotation does not exceed an angle of approximately +/- 3 degrees. Conclusions: The TCMCJ can be stimulated by the muscular apparatus to circumduct. The mechanisms are traced back to the curvature incongruity of the saddle surfaces. Hence we mathematically proved that none of the individual saddle surfaces can be described by a quadratic saddle surface as is often assumed in literature. We derived an algebraic formula with which the articulating surfaces in the TCMCJ can be quantitatively described. This formula can be used to shape the articulating surfaces in physiologically equivalent TCMCJ-prostheses."],["dc.identifier.doi","10.5277/ABB-00386-2015-02"],["dc.identifier.isi","000379915800011"],["dc.identifier.pmid","27405537"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41834"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wroclaw Univ Technology"],["dc.relation.issn","1509-409X"],["dc.title","The thumb carpometacarpal joint: curvature morphology of the articulating surfaces, mathematical description and mechanical functioning"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["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","339"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Annals of Anatomy - Anatomischer Anzeiger"],["dc.bibliographiccitation.lastpage","341"],["dc.bibliographiccitation.volume","189"],["dc.contributor.author","Ihlow, Dankmar"],["dc.contributor.author","Kubein-Meesenburg, Dietmar"],["dc.contributor.author","Fanghaenel, Jochen"],["dc.contributor.author","Thieme, Kirsten M."],["dc.contributor.author","Hahn, Wolfram"],["dc.contributor.author","Dathe, Henning"],["dc.contributor.author","Zech, Susanne"],["dc.contributor.author","Naegerl, Hans"],["dc.date.accessioned","2018-11-07T11:05:56Z"],["dc.date.available","2018-11-07T11:05:56Z"],["dc.date.issued","2007"],["dc.description.abstract","Examinations of the curvature morphology of the temporomandibular joints (TMJs) in macerated human skulls yielded that in initial protrusive cranial border motion, parts of the condylar articulating surfaces are only functional under force transmission. These areas were found on the lateral-central side of the condyle. In contrast to the Cercopithecus mona, a monkey species, the human TMJ apparently possesses a distinctly higher spatial performance range. (C) 2007 Elsevier GmbH. All rights reserved."],["dc.identifier.doi","10.1016/j.aanat.2007.02.007"],["dc.identifier.isi","000248006000007"],["dc.identifier.pmid","17695988"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/52183"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Gmbh, Urban & Fischer Verlag"],["dc.publisher.place","Jena"],["dc.relation.conference","102nd Annual Meeting of the Anatomische-Gesellschaft"],["dc.relation.eventlocation","Giessen, GERMANY"],["dc.relation.issn","0940-9602"],["dc.title","Aspects of morphotogy and guidance of the human temporomandibular joint"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","607"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","European Journal of Orthodontics"],["dc.bibliographiccitation.lastpage","613"],["dc.bibliographiccitation.volume","32"],["dc.contributor.author","Hahn, Wolfram"],["dc.contributor.author","Zapf, Antonia"],["dc.contributor.author","Dathe, Henning"],["dc.contributor.author","Fialka-Fricke, Julia"],["dc.contributor.author","Fricke-Zech, Susanne"],["dc.contributor.author","Gruber, Rudolf"],["dc.contributor.author","Kubein-Meesenburg, Dietmar"],["dc.contributor.author","Sadat-Khonsari, Reza"],["dc.date.accessioned","2018-11-07T08:36:11Z"],["dc.date.available","2018-11-07T08:36:11Z"],["dc.date.issued","2010"],["dc.description.abstract","Five identical appliances were manufactured from each of three materials, all with a thickness of 1.0 mm (Ideal Clear (R), Erkodur (R), and Biolon (R)). An upper central incisor, as part of the measuring device, was torqued in defined steps in the vestibular and palatal directions with the respective appliance in place. For statistical analysis, the resulting forces, Fx (forces acting in the palatal and facial directions) and Fz (intrusive force as a side-effect) at a displacement of +/- 0.15 and +/- 0.8 mm from the tooth at the gingival margin were calculated. The mean Fx forces for +/- 0.15 mm displacement ranged from -1.89 N [standard deviation (SD) 0.48] to 0.11 N (SD 0.1). The mean Fz forces were between -0.97 N (SD 0.57) and -0.07 N (SD 0.22). The highest intrusive forces were measured during palatal displacement of the measuring tooth. An influence of direction of displacement on the levels of force was observed, especially for Fz at the greater displacement of +/- 0.8 mm. In relation to the intended amount of root movement during torquing, aligners tend to 'lift up' and therefore no effective force couple can be established for further root control. The force delivery properties are also influenced by the material used and the shape of the tooth."],["dc.identifier.doi","10.1093/ejo/cjq007"],["dc.identifier.isi","000284638800005"],["dc.identifier.pmid","20462912"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/18252"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Oxford Univ Press"],["dc.relation.issn","0141-5387"],["dc.title","Torquing an upper central incisor with aligners-acting forces and biomechanical principles"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","583"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Journal of Biomechanics"],["dc.bibliographiccitation.lastpage","592"],["dc.bibliographiccitation.volume","37"],["dc.contributor.author","Mansour, Michael"],["dc.contributor.author","Spiering, S."],["dc.contributor.author","Lee, C."],["dc.contributor.author","Dathe, H."],["dc.contributor.author","Kalscheuer, A. K."],["dc.contributor.author","Kubein-Meesenburg, Dietmar"],["dc.contributor.author","Nagerl, H."],["dc.date.accessioned","2018-11-07T10:49:58Z"],["dc.date.available","2018-11-07T10:49:58Z"],["dc.date.issued","2004"],["dc.description.abstract","The biomechanical properties of the lumbar spine have long been studied. However, despite its enormous importance, basic functional and morphological properties have been not well understood and require further experimental analysis since data concerning the spatial instantaneous segmental motions are hardly available. This study describes the theoretical background and the technical properties of an innovative method for tracking the instantaneous 3D motion of human spinal segments in vitro at high spatial resolution. This new acquisition system allows to scrutinise closely the location and alignment of the segmental instantaneous helical axis (IHA) and the respective screw pitch as functions of the absolute rotational angle. The required precision of the measuring device was attained (a) by six highly resolving linear inductive displacement sensors in a special spatially configuration (3-2-1), (b) by a method to apply torque and force independently of each other without counteraction, and (c) by suppression of vibrations. The validity and reliability of the experimental set-up and the numerical method of data analysis were tested by subjects of known mechanical properties. In vitro experiments with a human lumbar segment (L3/L4, autopsy material) demonstrated that (a) the IHA migrated during axial rotation from one segmental articulatio zygapophysialis to the other joint, (b) the IHA tilted medial-laterally, and (c) the pitch of the screw altered linearly as a function of the rotational angle. This phenomenon is traced back to the guidance of the articluationes zygapophysiales. The validation of the method allows to map segments of the entire vertebral column. The results can be used as benchmarks for future models of the human spine. (C) 2003 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.jbiomech.2003.09.001"],["dc.identifier.isi","000220236600019"],["dc.identifier.pmid","14996572"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/48550"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Sci Ltd"],["dc.relation.issn","0021-9290"],["dc.title","Evidence for IHA migration during axial rotation of a lumbar spine segment by using a novel high-resolution 6D kinematic tracking system"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","107"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","ACTA OF BIOENGINEERING AND BIOMECHANICS"],["dc.bibliographiccitation.lastpage","115"],["dc.bibliographiccitation.volume","18"],["dc.contributor.author","Dathe, Henning"],["dc.contributor.author","Gezzi, Riccardo"],["dc.contributor.author","Fiedler, Christoph"],["dc.contributor.author","Kubein-Meesenburg, Dietmar"],["dc.contributor.author","Naezgerl, Hans"],["dc.date.accessioned","2018-11-07T10:19:36Z"],["dc.date.available","2018-11-07T10:19:36Z"],["dc.date.issued","2016"],["dc.description.abstract","Purpose: We investigate the dependence of the kinematics of the human knee on its anatomy. The idea of describing the kinematics of the knee in the sagittal plane using four-bar linkage is almost as old as kinematics as an independent discipline. We start with a comparison of known four-bar linkage constructions. We then focus on the model by H. Nagerl which is applicable under form closure. Methods: We use geometry and analysis as the mathematical methods. The relevant geometrical parameters of the knee will be determined on the basis of the dimensions of the four-bar linkage. This leads to a system of nonlinear equations. Results: The four-bar linkage will be calculated from the limits of the constructively accessible parameters by means of a quadratic approximation. Conclusions: By adapting these requirements to the dimensions of the human knee, it will be possible to obtain valuable indications for the design of an endoprosthesis which imitates the kinematics of the natural knee."],["dc.identifier.doi","10.5277/ABB-00464-2015-03"],["dc.identifier.isi","000393885300013"],["dc.identifier.pmid","28133380"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41696"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wroclaw Univ Technology"],["dc.relation.issn","1509-409X"],["dc.title","The description of the human knee as four-bar linkage"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","152"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie"],["dc.bibliographiccitation.lastpage","158"],["dc.bibliographiccitation.volume","70"],["dc.contributor.author","Sadat-Khonsari, Reza"],["dc.contributor.author","Dathe, Henning"],["dc.contributor.author","Knoesel, Michael"],["dc.contributor.author","Hahn, Wolfram"],["dc.contributor.author","Kubein-Meesenburg, Dietmar"],["dc.contributor.author","Bauss, Oskar"],["dc.date.accessioned","2018-11-07T08:32:17Z"],["dc.date.available","2018-11-07T08:32:17Z"],["dc.date.issued","2009"],["dc.description.abstract","Objective: The objective of this study consisted in determining the variability of the ANB angle in relation to the position of the A- and B-points in the sagittal vertical plane. Materials and Methods: Using a theoretical model, we varied the position of the cephalometric points A and B in the sagittal vertical plane while its sagittal relationship was kept constant (Wits value = 0 mm). For this purpose, seven Lines were erected perpendicular to the occlusal plane on a lateral cephalogram. The position of points A and B were determined on each of the vertical Lines by calculating one anterior and one posterior angle in each case. In this way, the positions of all A- and B-points were clearly defined in the sagittal vertical plane. Results: The characteristic of the ANB angle in the sagittal vertical plane was graphically represented by determining both points A and B using two angles instead of one. This revealed that the ANB angle for the same sagittal base relationship was characterized by major variations depending on the position of the A- and B-points in relation to the anterior cranial base. The Larger the SNA and SNB angles were, the larger the corresponding ANB angle. At the same time, the absolute value of ANB increased with the Length of the vertical distance between the points A and B. Conclusion: The ANB angle is strongly influenced by geometric factors. Accurate diagnosis of the sagittal base relationship should thus take the individual character of the ANB angle into account."],["dc.identifier.doi","10.1007/s00056-009-8809-5"],["dc.identifier.isi","000266559400005"],["dc.identifier.pmid","19322533"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17305"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Urban & Vogel"],["dc.relation.issn","1434-5293"],["dc.title","Geometric Influence of the Sagittal and Vertical Apical Base Relationship on the ANB Angle"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]