Full Text Journal Articles by
Author Mark Lenz

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Wound Closure After Port Implantation-a Randomized Controlled Trial Comparing Tissue Adhesive and Intracutaneous Suturing.

Saskia Witting, Maja Ingwersen, Thomas Lehmann, René Aschenbach, Niklas Eckardt, Jürgen Zanow, René Fahrner, Stephan Lotze, Reinhard Friedel, Mark Lenz, Claudia Schmidt, Diana Miguel, Laine Ludriksone, Ulf Teichgräber,

<h4>Background</h4>Wound healing after pectoral port implantation is a major factor determining the success or failure of the procedure. Infection and wound dehiscence can endanger the functionality of the port system and impede chemotherapy. The cosmetic result is important for patient satisfaction as well.<h4>Methods</h4>From August 2015 to July 2017, adult patients ... Read more >>

Dtsch Arztebl Int (Deutsches Arzteblatt international)
[2021, (Forthcoming):]

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Anatomical Study of Sinus Tarsi-Based Lateral Lengthening Calcaneal Osteotomy.

Matthias Aurich, Mark Lenz, Gunther O Hofmann, Wiebke Schubert, Matthias Knobe, Klaus Edgar Roth, Paul Simons, Kajetan Klos,

<h4>Background</h4>Lateral lengthening calcaneal osteotomy (LL-CO) is commonly performed as a treatment for an abducted midfoot in pes planovalgus deformity. The purpose of this study is to investigate potential damage to medial structures with a sinus tarsi LL-CO.<h4>Methods</h4>Sixteen cadaver feet were used. Eight feet had an extended lateral approach, and 8 ... Read more >>

Foot Ankle Int (Foot & ankle international)
[2021, :10711007211041345]

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Iatrogenic Damage to Neurovascular and Soft Tissue Structures During Lateral Release of Hallux Valgus: A Comparative Anatomical Study of Minimally Invasive Versus Open Surgical Techniques.

Kajetan Klos, Mark Lenz, Gunther O Hofmann, Wiebke Schubert, Matthias Knobe, Klaus Edgar Roth, Paul Simons, Matthias Aurich,

Lateral release is often an integral step in surgical correction of hallux valgus and can be performed using open or minimally invasive techniques. We investigated whether these techniques cause iatrogenic damage to arteries, nerves, tendons, or joint capsules. In this cadaver study, lateral release was performed on 9 pairs of ... Read more >>

J Foot Ankle Surg (The Journal of foot and ankle surgery : official publication of the American College of Foot and Ankle Surgeons)
[2021, :]

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[Comparison between navigated and conventional percutaneous screw fixation of non-displaced scaphoid fractures].

Kukuh Aji Prabowo, Eric Lopatta, Mark Lenz, Reinhardt Friedel, Ivan Marintschev, Isabel Graul, Ulf Teichgräber,

<h4>Background</h4>Incorrect screw placement and penetration in screw fixation of scaphoid fractures are found in 5 to 30 %. Therefore, optimizing of screw placement is desirable, especially because an exact central position of the screw in the proximal fragment leads to a significant higher stability as a more peripheral position.<h4>Patients und ... Read more >>

Handchir Mikrochir Plast Chir (Handchirurgie, Mikrochirurgie, plastische Chirurgie : Organ der Deutschsprachigen Arbeitsgemeinschaft fur Handchirurgie : Organ der Deutschsprachigen Arbeitsgemeinschaft fur Mikrochirurgie der Peripheren Nerven und Gefasse : Organ der V...)
[2021, 53(1):47-54]

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Comparison of Ligament-Repair Techniques for the Syndesmosis: A Simulated Cadaveric Weight-Bearing Computed Tomography Analysis.

Jennifer E Hagen, Sascha Rausch, Paul Simons, Mark Lenz, Matthias Knobe, Klaus Edgar Roth, Boyko Gueorguiev, R Geoff Richards, Kajetan Klos,

Although the literature describes a variety of reconstructive techniques for the syndesmosis, only few studies offer comparative data. Therefore, the authors compared 2 different ligament repair techniques for the syndesmosis. Sixteen paired fresh-frozen human cadaveric lower limbs were embedded in polymethyl methacrylate mid-calf and placed in a custom-made weightbearing simulation ... Read more >>

J Foot Ankle Surg (The Journal of foot and ankle surgery : official publication of the American College of Foot and Ankle Surgeons)
[2020, 59(6):1156-1161]

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Biomechanical evaluation of the docking nail concept in periprosthetic fracture fixation around a stemmed total knee arthroplasty.

Mark Lenz, Yves Pascal Acklin, Lena Anna Kasper, Dominic Mischler, Peter Varga, Ivan Zderic, Dominic Gehweiler, Kajetan Klos, Boyko Gueorguiev, Karl Stoffel,

Intramedullary femoral nails provide an ideal mechanical axis for periprosthetic fracture fixation. Slotted nails allow a connection to a total knee arthroplasty (TKA) stem. This study aims to compare implant and construct stiffness, interfragmentary movement and cycles to failure between an antegrade slotted femoral nail construct docked to a TKA ... Read more >>

J Biomech (Journal of biomechanics)
[2021, 115:110109]

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Biomechanical evaluation of retrograde docking nailing to a total hip arthroplasty stem in a periprosthetic femur fracture model.

Mark Lenz, Ladina Hofmann-Fliri, Lena Anna Kasper, Peter Varga, Ivan Zderic, Dominic Gehweiler, Kajetan Klos, Gunther O Hofmann, Karl Stoffel, Boyko Gueorguiev,

<h4>Introduction</h4>Slotted nails allow a connection to a total hip arthroplasty (THA) stem and act as intramedullary load carrier. This study compares construct stiffness, cycles to failure and failure load between a retrograde slotted femur nail construct docked to a THA stem and a lateral locking plate in a human periprosthetic ... Read more >>

Injury (Injury)
[2021, 52(1):53-59]

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Computed Tomography Analysis for Quantification of Displacement of the Distal Fibula in Different Foot Positions With Weightbearing and Sequentially Increased Instability: An Anatomic Cadaveric Study on Syndesmosis.

Jennifer E Hagen, Sascha Rausch, Paul Simons, R Geoff Richards, Mark Lenz, Matthias Knobe, Boyko Gueorguiev, Kajetan Klos,

Syndesmotic injuries are quite common, but accurate diagnosis and treatment can be difficult, in part because of individual anatomic variation and complex movements of the fibula in the incisura. The current cadaveric study was designed to investigate changes in the position of the fibula in the incisura during simulated weightbearing ... Read more >>

J Foot Ankle Surg (The Journal of foot and ankle surgery : official publication of the American College of Foot and Ankle Surgeons)
[2019, 58(4):734-738]

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Heat challenges can enhance population tolerance to thermal stress in mussels: a potential mechanism by which ship transport can increase species invasiveness

Mark Lenz, Yasser Ahmed, João Canning-Clode, Eliecer Díaz, Sandra Eichhorn, Armin G. Fabritzek, Bernardo A. P. da Gama, Marie Garcia, Karen von Juterzenka, Patrik Kraufvelin, Susanne Machura, Lisa Oberschelp, Filipa Paiva, Miguel A. Penna, Felipe V. Ribeiro, Martin Thiel, Daniel Wohlgemuth, Neviaty P. Zamani, Martin Wahl,

It is unclear whether transport by human vectors can increase the robustness of translocated populations and thereby enhance their invasiveness. To test this concept, we investigated the effect of heat stress on the tolerance of mussel populations towards a second stress event of the same kind. The heat challenges we ... Read more >>

Biol Invasions (Biological invasions.)
[2018, 20(11):3107-3122]

Cited: 1 time

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Influence of reduced tip-apex distance on helical blade fixation-a biomechanical study.

Mark Lenz, Jana Schwinn, Ladina Hofmann-Fliri, Ronald Schwyn, Matthias Knobe, Kajetan Klos, Heike Kielstein, Gunther O Hofmann, Boyko Gueorguiev,

Migration profile of helical blades differs from conventional screw design. Tip-apex distance (TAD) greater than 25 mm is associated with early failure in hip screws. This study investigates the effect of a reduced TAD on helical blade fixation. Six pairs of human femoral heads were used. Bone mineral density (BMD) was ... Read more >>

J Orthop Res (Journal of orthopaedic research : official publication of the Orthopaedic Research Society)
[2019, 37(3):649-654]

Cited: 2 times

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Acute atraumatic carpal tunnel syndrome due to flexor tendon rupture following palmar plate osteosynthesis in a patient taking rivaroxaban.

Wolfram Weschenfelder, Reinhard Friedel, Gunther O Hofmann, Mark Lenz,

<h4>Introduction</h4>Few case reports describe the development of a hematoma under oral anticoagulation as the cause of an atraumatic carpal tunnel syndrome.<h4>Case report</h4>A 76 years old woman presented an acute atraumatic carpal tunnel syndrome of her left hand under oral anticoagulation with rivaroxaban due to atrial fibrillation. 12 years ago, palmar plate osteosynthesis ... Read more >>

Arch Orthop Trauma Surg (Archives of orthopaedic and trauma surgery)
[2019, 139(3):435-438]

Cited: 1 time

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A Mosquito Bite with Devastating Complications in an Immunocompromised Patient.

Jochen J Frietsch, Nils Winkelmann, Friederike Hunstig, Ulf Schnetzke, Friedrich J Hammersen, Torsten Dönicke, Mark Lenz, Florian Gras, Sebastian Scholl, Andreas Hochhaus, Inken Hilgendorf,

Infectious complications such as invasive aspergillosis or infection with <i>Stenotrophomonas maltophilia</i> (SM) in immunocompromised patients are associated with a high mortality rate. Our report concerns a 40-year-old male newly diagnosed very severe aplastic anemia (vSAA) who in consequence of a mosquito bite was suffering from skin lesion and consecutive soft ... Read more >>

Case Rep Oncol (Case reports in oncology)
[2019, 12(1):22-28]

Cited: 1 time

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Axial and shear pullout forces of composite, porcine and human metatarsal and cuboid bones.

Mark Lenz, Boyko Gueorguiev, Juan B Gerstner Garces, Michael P Swords, Stefan Rammelt, Gunther O Hofmann, Ivan Zderic, Manuela Ernst, Robert Geoff Richards, Andrew K Sands,

<h4>Objectives</h4>The varying mechanical properties of human bone have influence on the study results. Pullout and shear forces of human bone were compared to different substitutes to evaluate their suitability for biomechanical studies.<h4>Methods</h4>After bone mineral density (BMD) determination, axial pullout tests were performed with cortical 3.5 mm nonlocking (NL) and 2.7 mm head ... Read more >>

J Orthop Translat (Journal of orthopaedic translation)
[2018, 14:67-73]

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Is augmented LISS plating biomechanically advantageous over conventional LISS plating in unstable osteoporotic distal femoral fractures?

Dimitar Todorov, Ivan Zderic, Robert Geoff Richards, Mark Lenz, Matthias Knobe, Dian Enchev, Asen Baltov, Boyko Gueorguiev, Karl Stoffel,

Treatment of complex osteoporotic distal femur fractures with the Less Invasive Stabilization System (LISS) has been associated with high complication rates. The aim of this study was to investigate the biomechanical competence of two different techniques of augmented versus conventional LISS plating. Unstable distal femoral fracture AO/OTA 33-A3 was created ... Read more >>

J Orthop Res (Journal of orthopaedic research : official publication of the Orthopaedic Research Society)
[2018, 36(10):2604-2611]

Cited: 2 times

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LagLoc-a new surgical technique for locking plate systems.

Miguel Triana, Boyko Gueorguiev, Christoph Sommer, Karl Stoffel, Yash Agarwal, Ivan Zderic, Tobias Helfen, James C Krieg, Fabian Krause, Matthias Knobe, Robert Geoff Richards, Mark Lenz,

Treatment of oblique and spiral fractures remains challenging. The aim of this study was to introduce and investigate the new LagLoc technique for locked plating with generation of interfragmentary compression, combining the advantages of lag screw and locking-head-screw techniques. Oblique fracture was simulated in artificial diaphyseal bones, assigned to three ... Read more >>

J Orthop Res (Journal of orthopaedic research : official publication of the Orthopaedic Research Society)
[2018, 36(11):2886-2891]

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Why and how do locking plates fail?

Boyko Gueorguiev, Mark Lenz,

Locking plates have led to important changes in bone fracture management, allowing flexible biological fracture fixation based on the principle of an internal fixator. The technique has its indications and limitations. Most of the typical failure patterns arise from basic technical errors. Types of locking plates, material properties and the ... Read more >>

Injury (Injury)
[2018, 49 Suppl 1:S56-S60]

Cited: 7 times

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Capture, swallowing, and egestion of microplastics by a planktivorous juvenile fish.

Nicolas Christian Ory, Camila Gallardo, Mark Lenz, Martin Thiel,

Microplastics (<5 mm) have been found in many fish species, from most marine environments. However, the mechanisms underlying microplastic ingestion by fish are still unclear, although they are important to determine the pathway of microplastics along marine food webs. Here we conducted experiments in the laboratory to examine microplastic ingestion (capture ... Read more >>

Environ Pollut (Environmental pollution (Barking, Essex : 1987))
[2018, 240:566-573]

Cited: 7 times

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Symphyseal fixation in open book injuries cannot fully compensate anterior SI joint injury-A biomechanical study in a two-leg alternating load model.

Fabian M Stuby, Mark Lenz, Stefan Doebele, Yash Agarwal, Hristo Skulev, Björn G Ochs, Jörn Zwingmann, Boyko Gueorguiev,

<h4>Introduction</h4>In open book injuries type Tile B1.1 or B1.2 also classified as APC II (anteroposterior compression), it remains controversial, if a fixation of the anterior ring provides sufficient stability or a fixation of the posterior ring should be included. Therefore the relative motion at the sacroiliac joint was quantified in ... Read more >>

PLoS One (PloS one)
[2017, 12(11):e0184000]

Cited: 2 times

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A Modified Lateral Approach for Total Knee Replacement in Type 2 Valgus Deformity.

Matthias Aurich, Mark Lenz, Norman Best,

Total knee replacement for patients with osteoarthritis and valgus deformity remains challenging, with soft tissue balance often difficult to achieve. Most orthopedic surgeons use the medial parapatellar approach for total knee replacement. However, the lateral approach described in this case allows direct access to the pathology. The valgus deformity is ... Read more >>

Orthopedics (Orthopedics)
[2017, 40(5):313-316]

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Anti‐epiphyte defences in the red seaweed Gracilaria vermiculophylla: non‐native algae are better defended than their native conspecifics

Shasha Wang, Dapeng Bian, Florian Weinberger, Gaoge Wang, Mark Lenz, Masahiro Nakaoka,

Epibiosis in the marine environment is a stressor that may determine invasion success in introduced species. Previous comparisons showed resistance to epibionts can be higher in non‐native than in resident seaweed species, but we do not know whether it is an intrinsic trait of the non‐natives or it has been ... Read more >>

J Ecol (journal of ecology.)
[2017, 105(2):445-457]

Cited: 1 time

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Biomechanical investigation of two plating systems for medial column fusion in foot.

Paul Simons, Theresia Sommerer, Ivan Zderic, Dieter Wahl, Mark Lenz, Hristo Skulev, Matthias Knobe, Boyko Gueorguiev, R Geoff Richards, Kajetan Klos,

<h4>Background</h4>Arthrodesis of the medial column (navicular, cuneiform I and metatarsal I) is performed for reasons such as Charcot arthropathy, arthritis, posttraumatic reconstruction or severe pes planus. However, the complication rate is still high and mainly resulting from inadequate fixation. Special plates, designed for medial column arthrodesis, seem to offer potential ... Read more >>

PLoS One (PloS one)
[2017, 12(2):e0172563]

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Reconstruction of the lateral tibia plateau fracture with a third triangular support screw: A biomechanical study.

Eduardo Moran, Ivan Zderic, Kajetan Klos, Paul Simons, Miguel Triana, R Geoff Richards, Boyko Gueorguiev, Mark Lenz,

Background:Split fractures of the lateral tibia plateau in young patients with good bone quality are commonly treated using two minimally invasive percutaneous lag screws, followed by unloading of the knee joint. Improved stability could be achieved with the use of a third screw inserted either in the jail-technique fashion or ... Read more >>

J Orthop Translat (Journal of orthopaedic translation)
[2017, 11:30-38]

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Bone Mass Distribution of the Distal Tibia in Normal, Osteopenic, and Osteoporotic Conditions: An Ex Vivo Assessment Using HR-pQCT, DXA, and Computational Modelling.

Lukas Kamer, Hansrudi Noser, Michael Blauth, Mark Lenz, Markus Windolf, Albrecht W Popp,

Osteoporosis leads to bone loss and structural deterioration, which increase the risk of fractures. The aim of this study was to characterize the three-dimensional (3D) bone mass distributions of the distal tibia in normal, osteopenic, and osteoporotic conditions. High-resolution peripheral quantitative computed tomography (HR-pQCT) of the 33 % of the distal ... Read more >>

Calcif Tissue Int (Calcified tissue international)
[2016, 99(6):588-597]

Cited: 5 times

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Plate fixation in periprosthetic femur fractures Vancouver type B1-Trochanteric hook plate or subtrochanterical bicortical locking?

Mark Lenz, Karl Stoffel, Heike Kielstein, Keith Mayo, Gunther O Hofmann, Boyko Gueorguiev,

<h4>Introduction</h4>Proximal plate fixation in periprosthetic femur fractures can be improved by plate anchorage in the greater trochanter (lateral tension band principle) or bicortical locking screw placement beside the prosthesis stem in an embracement configuration. Both concepts were compared in a biomechanical test using a femoral hook plate (hook) or a ... Read more >>

Injury (Injury)
[2016, 47(12):2800-2804]

Cited: 4 times

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Tolerance to stress differs between Asian green mussels Perna viridis from the impacted Jakarta Bay and from natural habitats along the coast of West Java.

Mareike Huhn, Giannina S I Hattich, Neviaty P Zamani, Karen von Juterzenka, Mark Lenz,

It is an open question whether adverse habitat conditions, characteristic for many anthropogenically impacted coastal habitats, can determine resistance to abiotic stress in populations of residing invertebrates. We tested experimentally for differences in stress tolerance between individuals of the Asian green mussel Perna viridis stemming from the heavily impacted Jakarta ... Read more >>

Mar Pollut Bull (Marine pollution bulletin)
[2016, 110(2):757-766]

Cited: 1 time

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