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  1. Article: Extensionsaufbau bei Unterschenkelamputierten zur Versorgung einer pertrochantären oder medialen Schenkelhalsfraktur

    Chotta, Said / Zeichen, Johannes

    OP-Journal

    2024  Volume 40, Issue 01, Page(s) 53–54

    Language German
    Publishing date 2024-04-01
    Publisher Georg Thieme Verlag KG
    Publishing place Stuttgart ; New York
    Document type Article
    ZDB-ID 2375266-X
    ISSN 1439-2496 ; 0178-1715
    ISSN (online) 1439-2496
    ISSN 0178-1715
    DOI 10.1055/a-2156-7638
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  2. Book ; Thesis: Die Expression von Kollagen Typ VI bei der Arthrofibrose

    Zeichen, Johannes

    eine immunhistochemische Untersuchung

    1999  

    Author's details vorgelegt von Johannes Zeichen
    Language German ; English
    Size [21] Bl., S. 315 - 318, Ill., 30 cm
    Publishing country Germany
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Hannover, Univ., Diss., 2000
    Note Enth. 1 Sonderabdr. aus: Arch orthop trauma surg ; 119. 1999
    HBZ-ID HT012971160
    Database Catalogue ZB MED Medicine, Health

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    2001 E 1112 order for loan Magazin

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  3. Article ; Online: Aus der Sektion Begutachtung der Deutschen Gesellschaft für Orthopädie und Unfallchirurgie in Zusammenarbeit mit der Deutschen Gesellschaft für Neurowissenschaftliche Begutachtung (DGNB) : Bemessungsempfehlungen für muskuloskelettale Verletzungsfolgen in der Privaten Unfallversicherung.

    Schiltenwolf, Marcus / Dresing, Klaus / Eckert, Johannes / Eyfferth, Torsten / Gaidzik, Peter Wolfgang / Grotz, Martin / Lundin, Sven / Thomann, Klaus-Dieter / Widder, Bernhard / Zeichen, Johannes

    Orthopadie (Heidelberg, Germany)

    2024  Volume 53, Issue 5, Page(s) 348–360

    Title translation From the Assessment Section of the German Society for Orthopedics and Trauma Surgery in collaboration with the German Society for Neuroscientific Assessment (DGNB) : Assessment recommendations for musculoskeletal injury consequences in private accident insurance.
    MeSH term(s) Humans ; Germany ; Insurance, Accident ; Orthopedics ; Societies, Medical ; Musculoskeletal System/injuries ; Musculoskeletal System/surgery ; Acute Care Surgery
    Language German
    Publishing date 2024-04-09
    Publishing country Germany
    Document type Journal Article
    ISSN 2731-7153
    ISSN (online) 2731-7153
    DOI 10.1007/s00132-024-04499-2
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  4. Conference proceedings: Hüftarthroplastik bei ankylosierender Spondylitis – Knochensparende Technik bei Hüftankylose

    Lugeder, Armin / Häring, Ewald / Zeichen, Johannes

    2014  , Page(s) PO19–1277

    Event/congress Deutscher Kongress für Orthopädie und Unfallchirurgie (DKOU 2014); Berlin; ; Berufsverband der Fachärzte für Orthopädie; 2014
    Keywords Medizin, Gesundheit
    Publishing date 2014-10-13
    Publisher German Medical Science GMS Publishing House; Düsseldorf
    Document type Conference proceedings
    DOI 10.3205/14dkou703
    Database German Medical Science

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  5. Article: Knieluxation

    Zeichen, Johannes / Sattler, Martin / Lugeder, Armin

    OP-JOURNAL

    2013  Volume 29, Issue 03, Page(s) 228–232

    Abstract: Die Knieluxation ist eine seltene, aber schwerwiegende Verletzung. Sie stellt eine enorme Herausforderung an die Therapie dar. Sehr häufig liegt zusätzlich eine Gefäß- oder Nervenverletzung vor. Eine ... ...

    Abstract Die Knieluxation ist eine seltene, aber schwerwiegende Verletzung. Sie stellt eine enorme Herausforderung an die Therapie dar. Sehr häufig liegt zusätzlich eine Gefäß- oder Nervenverletzung vor. Eine genaueste klinische Untersuchung ist erforderlich, um desaströse Komplikationen zu vermeiden. Die Behandlung einer Knieluxation erfordert immer eine individuelle Therapie und ist auch abhängig von den Begleitverletzungen. Notfallmäßig müssen eine offene Knieluxation, eine nicht reponierbare Luxation, eine Gefäßverletzung und ein Kompartmentsyndrom versorgt werden. Vor operativer Therapie ist eine Analyse der Bandverletzungen notwendig. Es stehen verschiedene operative Techniken zur Verfügung. Optimal wäre eine frühzeitige operative Behandlung, Eine Abschätzung der Prognose ist schwer.
    Language German
    Publishing date 2013-12-01
    Publisher Georg Thieme Verlag KG
    Publishing place Stuttgart ; New York
    Document type Article
    ZDB-ID 2375266-X
    ISSN 1439-2496 ; 0178-1715
    ISSN (online) 1439-2496
    ISSN 0178-1715
    DOI 10.1055/s-0033-1360152
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  6. Article ; Online: Extra- vs. intramedullary treatment of pertrochanteric fractures: a biomechanical in vitro study comparing dynamic hip screw and intramedullary nail.

    Weiser, Lukas / Ruppel, Andreas A / Nüchtern, Jakob V / Sellenschloh, Kay / Zeichen, Johannes / Püschel, Klaus / Morlock, Michael M / Lehmann, Wolfgang

    Archives of orthopaedic and trauma surgery

    2015  Volume 135, Issue 8, Page(s) 1101–1106

    Abstract: Introduction: Due to the demographic trend, pertrochanteric fractures of the femur will gain increasing importance in the future. Both extra- and intramedullary implants are used with good results in the treatment of these fractures. New, angular stable ...

    Abstract Introduction: Due to the demographic trend, pertrochanteric fractures of the femur will gain increasing importance in the future. Both extra- and intramedullary implants are used with good results in the treatment of these fractures. New, angular stable extramedullary implants promise increased postoperative stability even with unstable fractures. Additional trochanteric plates are intended to prevent secondary impaction, varisation and shortening of the fracture, as well as medialisation of the femoral shaft. The aim of this study was to perform a biomechanical comparison of both procedures regarding their postoperative stability and failure mechanisms.
    Materials and methods: Twelve fresh-frozen human femurs were randomized into two groups based on the volumetric bone mineral density (vBMD). Standardized pertrochanteric fractures (AO31-A2.3) were generated and treated either with an angular stable dynamic hip screw (DHS) or an intramedullary nail (nail). Correct implant position and the tip-apex distance (TAD) were controlled postoperatively using X-ray. Specimens were mounted in a servohydraulic testing machine and an axial loading was applied according to a single-leg stance model. Both groups were biomechanically compared with regard to native and postoperative stiffness, survival during cyclic testing, load to failure, and failure mechanisms.
    Results: TAD, vBMD, and native stiffness were similar for both groups. The stiffness decreased significantly from native to postoperative state in all specimens (p < 0.001). The postoperative stiffness of both groups varied non-significantly (p = 0.275). The failure loads for specimens treated with the nail were significantly higher than for those treated with the DHS (8480.8 ± 1238.9 N vs. 2778.2 ± 196.8 N; p = 0.008).
    Conclusions: Extra- and intramedullary osteosynthesis showed comparable results as regards postoperative stiffness and survival during cyclic testing. Since the failure load of the nail was significantly higher in the tested AO31-A2.3 fracture model, we conclude that intramedullary implants should be preferred in these, unstable, fractures.
    MeSH term(s) Aged ; Aged, 80 and over ; Biomechanical Phenomena ; Bone Screws ; Female ; Femoral Fractures/diagnostic imaging ; Femoral Fractures/surgery ; Fracture Fixation, Internal/instrumentation ; Fracture Fixation, Intramedullary/instrumentation ; Humans ; Male ; Middle Aged ; Models, Biological ; Radiography ; Random Allocation ; Weight-Bearing
    Language English
    Publishing date 2015-08
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 80407-1
    ISSN 1434-3916 ; 0003-9330 ; 0344-8444
    ISSN (online) 1434-3916
    ISSN 0003-9330 ; 0344-8444
    DOI 10.1007/s00402-015-2252-4
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  7. Article: Hinged external fixation and closed reduction for distal humerus fracture.

    Haasper, Carl / Jagodzinski, Michael / Krettek, Christian / Zeichen, Johannes

    Archives of orthopaedic and trauma surgery

    2006  Volume 126, Issue 3, Page(s) 188–191

    Abstract: Elbow fractures are relatively rare in extremity injuries. Functional deficits often comprise the outcome. We report of a 77-year-old diabetic lady with a distal humerus fracture. She was treated with external fixation and closed reduction. Special ... ...

    Abstract Elbow fractures are relatively rare in extremity injuries. Functional deficits often comprise the outcome. We report of a 77-year-old diabetic lady with a distal humerus fracture. She was treated with external fixation and closed reduction. Special emphasis was directed to early motion exercises. Follow-up after 1 year demonstrated a range of motion of 0-30-130 degrees for extension and flexion of the elbow joint. No neurovascular deficits were seen. The use of a hinged device was successful in re-establishing a good function. Although there are no earlier reports using this technique in acute treatment, we consider this strategy as an alternative option in carefully selected cases.
    MeSH term(s) Accidental Falls ; Aged ; Diabetes Mellitus, Type 2/complications ; Female ; Fracture Fixation, Internal/methods ; Humans ; Humeral Fractures/diagnostic imaging ; Humeral Fractures/surgery ; Tomography, X-Ray Computed
    Language English
    Publishing date 2006-04
    Publishing country Germany
    Document type Case Reports ; Journal Article
    ZDB-ID 80407-1
    ISSN 1434-3916 ; 0936-8051 ; 0003-9330 ; 0344-8444
    ISSN (online) 1434-3916
    ISSN 0936-8051 ; 0003-9330 ; 0344-8444
    DOI 10.1007/s00402-006-0116-7
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  8. Article: [Arthroscopic partial meniscectomy].

    Zeichen, Johannes / Hankemeier, Stefan / Knobloch, Karsten / Jagodzinski, Michael

    Operative Orthopadie und Traumatologie

    2006  Volume 18, Issue 5-6, Page(s) 380–392

    Abstract: Objective: Excision of damaged meniscal tissue whereby the mechanical obstacles to joint movement are eliminated. As much functional, intact meniscal tissue should be retained as possible. Resection of only the bare minimum.: Indications: Symptomatic, ...

    Abstract Objective: Excision of damaged meniscal tissue whereby the mechanical obstacles to joint movement are eliminated. As much functional, intact meniscal tissue should be retained as possible. Resection of only the bare minimum.
    Indications: Symptomatic, irreparable lesions of the meniscus due to trauma or degeneration.
    Contraindications: Reparable lesions of the meniscus. Local skin affections.
    Surgical technique: Introduction of the arthroscope through an anterolateral or central portal. The instrument portal is positioned in accordance with the situation of the meniscal lesion to be treated. The tissue to be excised is either broken into fragments with different punches or resected en bloc.
    Postoperative management: Functional postoperative management without immobilization. Full loading on the leg.
    Results: Very good and good clinical results can be achieved in the short and long term after arthroscopic partial meniscectomy. In a study by Burks et al., 88% of 146 patients with stable knee joints had a very good or good result 14.7 years after partial meniscectomy. 95% of 57 patients were satisfied or very satisfied with the result 12 years after partial medial meniscectomy. A degenerative meniscal tear, axial deformity, higher age, and anterior cruciate ligament insufficiency are factors associated with an increased rate of arthrosis in the long term.
    MeSH term(s) Ambulatory Surgical Procedures ; Arthroscopes ; Arthroscopy/methods ; Humans ; Knee Injuries/surgery ; Menisci, Tibial/surgery ; Osteoarthritis, Knee/surgery ; Postoperative Complications/etiology ; Surgical Instruments
    Language German
    Publishing date 2006-12
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1007514-8
    ISSN 1439-0981 ; 0934-6694
    ISSN (online) 1439-0981
    ISSN 0934-6694
    DOI 10.1007/s00064-006-1184-0
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  9. Article: Tissue engineering of osteochondral constructs in vitro using bioreactors.

    Haasper, Carl / Zeichen, Johannes / Meister, Roland / Krettek, Christian / Jagodzinski, Michael

    Injury

    2008  Volume 39 Suppl 1, Page(s) S66–76

    Abstract: Articular cartilage is a relatively simple tissue, but has a limited capacity of restoration. Tissue engineering is a promising field that seeks to accomplish the in vitro generation of complex, functional, 3-dimensional tissues. Various cell types and ... ...

    Abstract Articular cartilage is a relatively simple tissue, but has a limited capacity of restoration. Tissue engineering is a promising field that seeks to accomplish the in vitro generation of complex, functional, 3-dimensional tissues. Various cell types and scaffolds have been tested for these purposes. The results of tissue engineered cartilage and bone are as yet inferior to native tissue. Strain and perfusion have been shown to stimulate cell proliferation and differentiation of various cell phenotypes. The perfect protocol to produce articular cartilage has not been defined yet. Bioreactors could provide the environment to engineer osteochondral constructs in vitro and to provide a stress protocol. The bioreactor has to provide an economically viable approach to automated manufacture of functional grafts under clinical aspects. Composite engineered tissues, like an engineered joint, represent a future goal. Cross-disciplinary approaches are necessary in order to succeed in engineering osteochondral grafts that provide adequate primary biomechanical stability and incorporate rapidly in vivo with histological appearance close to healthy osteochondral tissue. This review surveys current clinical and experimental concepts and discusses challenges and future expectations in this advancing field of regenerative medicine focusing human osteochondral constructs in bioreactors.
    MeSH term(s) Bioreactors ; Cartilage, Articular/cytology ; Chondrogenesis/physiology ; Guided Tissue Regeneration/methods ; Humans ; Osteoarthritis/prevention & control ; Osteochondritis ; Tissue Engineering/methods ; Tissue Scaffolds
    Language English
    Publishing date 2008-04
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 218778-4
    ISSN 1879-0267 ; 0020-1383
    ISSN (online) 1879-0267
    ISSN 0020-1383
    DOI 10.1016/j.injury.2008.01.037
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  10. Article: Improvement of Orthopedic Residency Programs and Diversity: Dilemmas and Challenges, an International Perspective.

    Fayaz, Hangama C / Smith, Raymond M / Ebrahimzadeh, Mohammad H / Pape, Hans-Christoph / Parvizi, Javad / Saleh, Khaled J / Stahl, Jens-Peter / Zeichen, Johannes / Kellam, James F / Mortazavi, Javad / Rajgopal, Ashok / Dahiya, Vivek / Zinser, Wolfgang / Reznik, Leonid / Shubnyakov, Igor / Pećina, Marko / Jupiter, Jesse B

    The archives of bone and joint surgery

    2018  Volume 7, Issue 4, Page(s) 384–396

    Abstract: Background: To date, little has been published comparing the structure and requirements of orthopedic training programs across multiple countries. The goal of this study was to summarize and compare the characteristics of orthopedic training programs in ...

    Abstract Background: To date, little has been published comparing the structure and requirements of orthopedic training programs across multiple countries. The goal of this study was to summarize and compare the characteristics of orthopedic training programs in the U.S.A., U.K., Canada, Australia, Germany, India, China, Saudi Arabia, Russia and Iran.
    Methods: We communicated with responders using a predetermined questionnaire regarding the national orthopedic training program requirements in each respondent's home country. Specific items of interest included the following: the structure of the residency program, the time required to become an orthopedic surgeon, whether there is a log book, whether there is a final examination prior to becoming an orthopedic surgeon, the type and extent of faculty supervision, and the nature of national in-training written exams and assessment methods. Questionnaire data were augmented by reviewing each country's publicly accessible residency training documents that are available on the web and visiting the official website of the main orthopedic association of each country.
    Results: The syllabi consist of three elements: clinical knowledge, clinical skills, and professional skills. The skill of today's trainees predicts the quality of future orthopedic surgeons. The European Board of Orthopedics and Traumatology (EBOT) exam throughout the European Union countries should function as the European board examination in orthopedics. We must standardize many educational procedures worldwide in the same way we standardized patient safety.
    Conclusion: Considering the world's cultural and political diversity, the world is nearly unified in regards to orthopedics. The procedures (structure of the residency programs, duration of the residency programs, selection procedures, using a log book, continuous assessment and final examination) must be standardized worldwide, as implemented for patient safety. To achieve this goal, we must access and evaluate more information on the residency programs in different countries and their needs by questioning them regarding what they need and what we can do for them to make a difference.
    Language English
    Publishing date 2018-09-10
    Publishing country Iran
    Document type Journal Article
    ZDB-ID 2782053-1
    ISSN 2345-461X ; 2345-4644
    ISSN (online) 2345-461X
    ISSN 2345-4644
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