Werner Schmoelz
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View article: Biomechanical comparison of fixation techniques for associated both-column acetabular fractures requiring single (anterior or posterior) versus combined anterior–posterior approaches
Biomechanical comparison of fixation techniques for associated both-column acetabular fractures requiring single (anterior or posterior) versus combined anterior–posterior approaches Open
View article: HR-pQCT and 3D Printing for Forensic and Orthopaedic Analysis of Gunshot-Induced Bone Damage
HR-pQCT and 3D Printing for Forensic and Orthopaedic Analysis of Gunshot-Induced Bone Damage Open
Background/Objectives: Recent breakthroughs in three-dimensional (3D) printing and high-resolution imaging have opened up new possibilities in personalized medicine, surgical planning, and forensic reconstruction. This study breaks new gro…
View article: N-chlorotaurine does not alter structural tendon properties: a comparative biomechanical study
N-chlorotaurine does not alter structural tendon properties: a comparative biomechanical study Open
Introduction N-chlorotaurine (NCT) is a well-tolerated antiseptic with broad-spectrum microbicidal activity and could therefore be a promising alternative to vancomycin, the current standard of care for the prevention of postoperative sept…
View article: Anatomical landmarks are more accurate in identifying the ideal femoral insertion for modified Larson reconstruction of posterolateral corner than radiological landmarks
Anatomical landmarks are more accurate in identifying the ideal femoral insertion for modified Larson reconstruction of posterolateral corner than radiological landmarks Open
Purpose In surgery for posterolateral knee instabilities, the modified Larson technique (MLT) is a fibular tunnel–based reconstruction technique with a single femoral tunnel aiming for an isometric graft insertion point (IGIP). The IGIP ca…
View article: Proximal Junction and Transitional Mechanics and Effect of a Novel Tether Pedicle Screw in Long-Segment Spinal Instrumentation
Proximal Junction and Transitional Mechanics and Effect of a Novel Tether Pedicle Screw in Long-Segment Spinal Instrumentation Open
Study Design. A biomechanical study of 10 human thoracolumbar (T7–L2) spine specimens was performed. Objective. To analyze the biomechanical characteristics of a Tether pedicle screw (TPS) in long-segment thoracolumbar instrumentation in t…
View article: Posterolateral Knee Ligament Reconstruction Using the Arciero Technique Provides Greater Rotational Stability Than the Modified Larson Technique: A Biomechanical Study
Posterolateral Knee Ligament Reconstruction Using the Arciero Technique Provides Greater Rotational Stability Than the Modified Larson Technique: A Biomechanical Study Open
Background: It is still unknown if the double–femoral tunnel technique (Arciero [ARC]) provides better stability as compared with the single–femoral tunnel technique (modified Larson [LAR]) in posterolateral corner reconstruction. The idea…
View article: Revision strategies for loosened pedicle screws: Larger screw diameter, cement augmentation or both?
Revision strategies for loosened pedicle screws: Larger screw diameter, cement augmentation or both? Open
View article: Overconstraint Associated With a Modified Lemaire Lateral Extra-Articular Tenodesis Is Decreased by Using an Anterior Femoral Insertion Point in a Cadaveric Model
Overconstraint Associated With a Modified Lemaire Lateral Extra-Articular Tenodesis Is Decreased by Using an Anterior Femoral Insertion Point in a Cadaveric Model Open
Using an LET insertion point anterior to the epicondyle was recently reported to lower the risk of tunnel interference and has now been shown to restore internal tibial rotation effectively in vitro in the course of the present study. Conc…
View article: Modified Lemaire Tenodesis Forces in Cadaveric Specimens Are Not Affected by Random Small-Scale Variations in the Femoral Insertion Point During Active Knee Joint Flexion-Extension
Modified Lemaire Tenodesis Forces in Cadaveric Specimens Are Not Affected by Random Small-Scale Variations in the Femoral Insertion Point During Active Knee Joint Flexion-Extension Open
Low LET forces can be expected during flexion-extension of the knee joint. Small-scale deviations in the femoral LET insertion point around the target insertion position in the modified Lemaire technique might have a minor effect on graft …
View article: Pedicle screw augmentation in posterior constructs of the thoracolumbar spine: How many pedicle screws should be augmented?
Pedicle screw augmentation in posterior constructs of the thoracolumbar spine: How many pedicle screws should be augmented? Open
Global failure loads were comparable among the three groups and unchanged with augmentation because the adjacent segment and not the instrumentation failed first. Augmentation of all screws showed significant improved in screw anchorage.
View article: Actuator and Contact Force Modeling of an Active Soft Brace for Scoliosis
Actuator and Contact Force Modeling of an Active Soft Brace for Scoliosis Open
Scoliosis is an abnormality of the spinal curvature that severely affects the musculoskeletal, respiratory, and nervous systems. Conventionally, it is treated using rigid spinal braces. These braces are static, rigid, and passive in nature…
View article: Modified Lemaire tenodesis reduces anterior cruciate ligament graft forces during internal tibial torque loading
Modified Lemaire tenodesis reduces anterior cruciate ligament graft forces during internal tibial torque loading Open
Purpose The aim of the study was to directly measure graft forces of an anterior cruciate ligament reconstruction (ACLR) and a lateral extra‐articular tenodesis (LET) using the modified Lemaire technique in combined anterior cruciate ligam…
View article: Standardized fracture creation in the distal humerus and the olecranon for surgical training and biomechanical testing
Standardized fracture creation in the distal humerus and the olecranon for surgical training and biomechanical testing Open
Introduction Surgical training and biomechanical testing require models that realistically represent the in vivo injury condition. The aim of this work was to develop and test a method for the generation of distal humerus fractures and ole…
View article: Systematic Review of Back-Support Exoskeletons and Soft Robotic Suits
Systematic Review of Back-Support Exoskeletons and Soft Robotic Suits Open
Lower back pain and musculoskeletal injuries are serious concerns for workers subjected to physical workload and manual material handling tasks. Spine assistive exoskeletons are being developed to support the spine and distribute the spine…
View article: The impact of lateral pedicle screw misplacement and subsequent correction of screw trajectory on screw anchorage. A biomechanical analysis
The impact of lateral pedicle screw misplacement and subsequent correction of screw trajectory on screw anchorage. A biomechanical analysis Open
View article: Evaluation of mushroom-shaped allograft for unstable proximal humerus fractures
Evaluation of mushroom-shaped allograft for unstable proximal humerus fractures Open
View article: The Effect of Rod Pattern, Outrigger, and Multiple Screw-Rod Constructs for Surgical Stabilization of the 3-Column Destabilized Cervical Spine - A Biomechanical Analysis and Introduction of a Novel Technique
The Effect of Rod Pattern, Outrigger, and Multiple Screw-Rod Constructs for Surgical Stabilization of the 3-Column Destabilized Cervical Spine - A Biomechanical Analysis and Introduction of a Novel Technique Open
A novel reconstructive technique, the 6S3R-construct, was shown to outperform all other constructs and might resemble a new standard of reference for advanced posterior fixation.
View article: Biomechanical comparison of fixation techniques for transverse acetabular fractures – Single-leg stance vs. sit-to-stand loading
Biomechanical comparison of fixation techniques for transverse acetabular fractures – Single-leg stance vs. sit-to-stand loading Open
SLS loading appeared to overestimate the strength of acetabular fracture fixation constructs and STS loading may be more appropriate to provide clinically relevant biomechanical data. Internal fixation of a single column might not provide …
View article: Local osteo-enhancement of osteoporotic vertebra with a triphasic bone implant material increases strength—a biomechanical study
Local osteo-enhancement of osteoporotic vertebra with a triphasic bone implant material increases strength—a biomechanical study Open
View article: Functional and radiographic evaluation of an interspinous device as an adjunct for lumbar interbody fusion procedures
Functional and radiographic evaluation of an interspinous device as an adjunct for lumbar interbody fusion procedures Open
In the last decades, several interspinous process devices were designed as a minimally invasive treatment option for spinal stenosis. In order to minimise surgical trauma, interspinous process devices were recently discussed as an alternat…
View article: Biomechanical Study of a Novel, Expandable, Non-Metallic and Radiolucent CF/PEEK Vertebral Body Replacement (VBR)
Biomechanical Study of a Novel, Expandable, Non-Metallic and Radiolucent CF/PEEK Vertebral Body Replacement (VBR) Open
Vertebral body replacement is well-established to stabilize vertebral injuries due to trauma or cancer. Spinal implants are mainly manufactured by metallic alloys; which leads to artifacts in radiological diagnostics; as well as in radioth…
View article: Effect of pedicle screw augmentation with a self-curing elastomeric material under cranio-caudal cyclic loading—a cadaveric biomechanical study
Effect of pedicle screw augmentation with a self-curing elastomeric material under cranio-caudal cyclic loading—a cadaveric biomechanical study Open
View article: Pedicle screw anchorage of carbon fiber-reinforced PEEK screws under cyclic loading
Pedicle screw anchorage of carbon fiber-reinforced PEEK screws under cyclic loading Open
Using nonmetallic CF/PEEK instead of standard titanium as pedicle screw material did not affect screw loosening in the chosen test setup, whereas cement augmentation enhanced screw anchorage of CF/PEEK screws. While comparable to titanium …
View article: Effects of multilevel posterior ligament dissection after spinal instrumentation on adjacent segment biomechanics as a potential risk factor for proximal junctional kyphosis: a biomechanical study
Effects of multilevel posterior ligament dissection after spinal instrumentation on adjacent segment biomechanics as a potential risk factor for proximal junctional kyphosis: a biomechanical study Open
View article: Biomechanical evaluation of straight antegrade nailing in proximal humeral fractures: the rationale of the “proximal anchoring point”
Biomechanical evaluation of straight antegrade nailing in proximal humeral fractures: the rationale of the “proximal anchoring point” Open
The PAP provided significantly increased stability in SAN constructs compared to the same setup without this additional proximal anchoring point. Varus-displacing forces to the humeral head were superiorly reduced in this setting. This stu…
View article: Timing of PMMA cement application for pedicle screw augmentation affects screw anchorage
Timing of PMMA cement application for pedicle screw augmentation affects screw anchorage Open
The time of cement application has an effect on PS anchorage in the osteoporotic vertebral body if a reposition maneuver of the instrumented vertebrae is carried out. PS augmented after the reposition maneuver showed a significant higher n…
View article: Significant differences in femoral torsion values depending on the CT measurement technique
Significant differences in femoral torsion values depending on the CT measurement technique Open
Femoral torsion values depend on the measurement technique. When derotational osteotomy is being considered, it is essential to use different threshold values depending on the measurement technique.
View article: Erratum to: Effect of augmentation techniques on the failure of pedicle screws under cranio-caudal cyclic loading
Erratum to: Effect of augmentation techniques on the failure of pedicle screws under cranio-caudal cyclic loading Open