Sebastian I Wolf

Universität Heidelberg · Department of Orthopedics and Traumatology

Background Ankle fractures are common fractures in trauma surgery. Several studies have compared gait patterns between affected patients and control groups. However, no one used the Heidelberg Foot Measurement Method in combination with statistical parametric mapping of the entire gait cycle in this patient cohort. We sought to identify possible mo...

Objective: To investigate the impact of varus malalignment of the knee on pain reduction achieved by an ankle-foot orthosis and a laterally wedged insole in patients with medial knee osteoarthritis. Design: Secondary analysis of a randomized, clinically prospective cross-over study. Patients: Twenty-eight participants with medial knee osteoart...

A variety of gait pathologies is seen in cerebral palsy. Movement patterns between different levels of functional impairment may differ. The objective of this work was the evaluation of Gross Motor Function Classification System (GMFCS) level-specific movement disorders. A total of 89 individuals with unilateral cerebral palsy and no history of pri...

Background Bilateral internal rotation gait is a common gait abnormality in children with bilateral cerebral palsy, but still not fully understood. Research question The aim of this clinical study was to analyze the effects of artificially induced bilateral internal rotation gait on kinematics and kinetics. Our hypothesis was, that the internal ro...

Objective To investigate the relationship of frontal plane ankle mobility with the effects of an ankle-foot orthosis (AFO) and a laterally wedged insole (LWI) on knee adduction moment (KAM) in the treatment of medial knee osteoarthritis. Design Randomized, non-blinded cross-over trial. Setting Outpatient clinic of university hospital. Participan...

Background Patellar height is a valuable measure to evaluate the effect of patellar tendon advancement (PTA) on knee function. In the literature, there is no validated procedure to measure the patellar height. In this study we aimed to (1) determine the patella position through musculoskeletal modeling, (2) investigate the effects of two surgical p...

Background: Patellar tendon advancement (PTA) is performed for the treatment of crouch gait in patients with cerebral palsy (CP). In this study, we aimed to determine the influence of PTA in the context of single-event multilevel surgery (SEMLS) on knee joint moment and muscle forces through musculoskeletal modeling; Methods: Gait data of children...

Background Although functional methods determining the hip joint center (HJC) are becoming increasingly popular, no systematic investigation has been conducted yet to assess the reliability of functional hip joint calibration in patients with cerebral palsy (CP). Research question What is the most reliable way to conduct functional calibration mot...

Objective To compare biomechanical and clinical outcome of laterally wedged insoles (LWI) and an ankle-foot orthosis (AFO) in patients with medial knee osteoarthritis. Design Single-centre, block-randomized, cross-over controlled trial. Setting Outpatient clinic. Subjects About 39 patients with symptomatic medial knee osteoarthritis. Interventi...

Objective: Aim of the investigation was to assess the contribution of pain to functional, social, and health-related quality of life (Qol) outcomes in adults with cerebral palsy. Design: This monocentric, prospective study included long-term data for ambulant adults with cerebral palsy and at level I to III in the Gross Motor Function Classifica...

Background: The anatomic appearance and biomechanical and clinical importance of the anterior meniscus roots are well described. However, little is known about the loads that act on these attachment structures under physiological joint loads and movements. Hypotheses: As compared with uniaxial loading conditions under static knee flexion angles...

As cerebral palsy (CP) is a complex disorder, classification of gait pathologies is difficult. It is assumed that unclassified patients show less functional impairment and less gait deviation. The aim of this study was to assess the different subgroups and the unclassified patients with unilateral CP using different gait indices. The Gillette Gait...

Background Attempts to improve protocol standards of marker-based clinical gait analysis (CGA) have been one of the main focuses of research to enhance robustness and reliability outcomes since the 1990s. Determining joint centers and axes constitutes an important aspect of those protocols. Although the hip joint is more prominent in such studies,...

Introduction: A unilateral transfemoral amputation (TFA) has a major impact on function. A leg-length discrepancy is the primary structural change, accompanied by the loss of lower-limb muscle volume and function. Prostheses can help individuals with a TFA to regain function, but such individuals still do not reach the functional level of unimpair...

Purpose The coordination of the glenohumeral joint and the shoulder girdle has been known as scapulohumeral rhythm. The effects of anatomical total shoulder arthroplasty (aTSA) are still subject to research. Former studies indicated higher amount of scapula lateral rotation to compensate for reduced glenohumeral elevation. The purpose of the presen...

Background: Ankle sprains and fractures are most common injuries in orthopedic and trauma surgery. The concurrent occurrence of syndesmosis ruptures in these injuries represents a more complex problem, as they often remain undetected. A proper and accurate treatment of injuries of the syndesmosis, both isolated and combined with fractures, is nece...

Background Compared to walking on level ground, ascending stairs requires a large range of motion not only of the hip and knee joint, but also of the ankle joint. The prosthesis often worn by persons with partial foot amputation largely prevents the ankle motion needed during stair ascent. Objectives Aim of this study was to assess subjects with a...

Background: Ankle sprains and fractures are most common injuries in orthopedic and trauma surgery. The concurrent occurrence of syndesmosis ruptures in these injuries represents a more complex problem, as they often remain undetected. A proper and accurate treatment of injuries of the syndesmosis, both isolated and combined with fractures, is neces...

Background: Massive irreparable posterosuperior rotator cuff tears may result in the loss of external rotation. Most of the patients with posterosuperior rotator cuff tears suffer from a restriction in their daily life actions. Latissimus dorsi tendon transfer (LDTT) is a method to restore abduction and external rotation in these patients. However,...

Background Massive irreparable posterosuperior rotator cuff tears may result in a loss of external rotation. Most of these patients lose their ability to perform activities of daily living (ADLs), especially where external rotation and abduction are needed. Latissimus dorsi tendon transfer (LDTT) is a method to restore abduction and external rotati...

Background: Despite of many attempts to determine or correct hip and knee joint parameters via non-invasive techniques such as regression or functional methods, in conventional gait models the position of the ankle joint center still is assumed at the center point between malleoli. Research question: The aim of this study was to estimate the ank...

Background: Ankle sprains and fractures are most common injuries in orthopedic and trauma surgery. The concurrent occurrence of syndesmosis ruptures in these injuries represents a more complex problem, as they often remain undetected. A proper and accurate treatment of isolated injuries of the syndesmosis is necessary to avoid long-term consequence...

Introduction The aim of this study is to investigate the variation of the glenohumeral and scapulothoracic motion in progressive severity of glenohumeral osteoarthritis using a 3D-motion analysis. Moreover, the variation of the Constant Score is evaluated. Hypothesis The hypothesis is that the motion of the scapulothoracic joint may partly compens...

Background: Ankle sprains and fractures are most common injuries in orthopedic and trauma surgery. The concurrent occurrence of syndesmosis ruptures in these injuries represents a more complex problem, as they often remain undetected. A proper and accurate treatment of injuries of the syndesmosis, both isolated and combined with fractures, is neces...

Background: Ankle sprains and fractures are most common injuries in orthopedic and trauma surgery. The concurrent occurrence of syndesmosis ruptures in these injuries represents a more complex problem, as they often remain undetected. A proper and accurate treatment of injuries of the syndesmosis, both isolated and combined with fractures, is neces...

Introduction: The aim of this study is to investigate the variation of the glenohumeral and scapulothoracic motion in progressive severity of glenohumeral osteoarthritis using a 3-D-motion analysis. Moreover, the variation of the Constant Score is evaluated. Hypothesis: The hypothesis is that the motion of the scapulothoracic joint may partly co...

The in vitro determination of realistic loads acting in knee ligaments, articular cartilage, menisci and their attachments during daily activities require the creation of physiological muscle forces, ground reaction force and unconstrained kinematics. However, no in vitro test setup is currently available that is able to simulate such physiological...

Background Osteoarthritis is the most common joint disease worldwide and mostly affects the knee joint (gonarthrosis). In treatment algorithms, technical aids in the form of laterally wedged insoles, valgizing knee braces and ankle-foot orthoses have an importance in the treatment of medial unicompartmental knee joint disease. However, national and...

Side-to-side differences in knee biomechanics are considered risk factors for anterior cruciate ligament (ACL) injuries in sports. We found that progressive sport specific sensorimotor training (PSSMT) reduced flexion moment side-to-side differ-rence during a Drop Jump task. In contrast, machine based hypertrophy training (HYPT) increased the imbal...

Objective: To date there is only limited knowledge about the wearing time of orthoses. Ankle-foot orthoses (AFOs) have not been studied with this research question. Additional influences of the orthotic design as well as weekdays and the weekend are also unknown. Design: Monocentric, clinically prospective intervention study. Patients: Inclusi...

Deficient motor control during landing is considered a risk factor for anterior cruciate ligament (ACL) injury. The aim of this study was to investigate the effects of six-weeks progressive sport-specific sensorimotor training (PSSMT) versus machine-based hypertrophy training (HYPT) on knee biomechanics and electromyographic activity of elite femal...

Background: In subjects with Chopart amputation the foot lever is clearly diminished. Usually high or low profile prostheses are routinely utilized to re-establish the lost forefoot lever. Research question: The aim of this study was to investigate to what extent the proposed prostheses were able to replace the forefoot lever in chopart-amputees...

Background Due to the limited knee range of motion, achieving adequate foot clearance while walking on level ground constitutes a major problem for patients with cerebral palsy and stiff knee gait. Stair negotiation as an activity of daily life requires a considerably higher knee range of motion than level ground walking, but little is known yet as...

Wenngleich die Anzahl an Majoramputationen bundesweit rückläufig ist, finden weiterhin mehr als 57.000 amputationschirurgische Eingriffe statt. Auch aufgrund hoher prothetischer Versorgungskosten resultieren daher weiterhin eine Vielzahl sozialgerichtlicher Auseinandersetzungen, in denen medizinische Sachverständigengutachten angefordert werden. Un...

Purpose: The purpose of this study was to examine how total shoulder arthroplasty improves performance of activities of daily living compared to patients with glenohumeral osteoarthritis and how they perform compared to healthy controls. Methods: Glenohumeral and humerothoracical elevation used by patients with primary osteoarthritis (12 partici...

Background: Due to the limited knee range of motion, achieving adequate foot clearance while walking on level ground constitutes a major problem for patients with cerebral palsy and stiff knee gait. Stair negotiation as an activity of daily life requires a considerably higher knee range of motion than level ground walking, but little is known yet...

Background Treatment of cerebral palsy includes an interdisciplinary concept and in more severe cases the well-established multi-level surgery (MLS). Different kinds of orthoses are typically part of postoperative treatment but there is a lack of knowledge about their additional benefit. Research question Do ankle foot orthoses lead to an additio...

Die Tragedauer von Orthesen unterschiedlicher Versorgungshöhen bei Patienten mit neuromuskulären Gang-störungen wird über einen Zeitraum von drei Monaten gemessen. Ergänzend dazu werden die Gehfähigkeit sowie die Zufriedenheit mit den Hilfsmitteln und deren Handhabung im Alltag erhoben, um die Einflussfaktoren auf die Tragedauer zu ermitteln. The...

Aim To evaluate short‐term (1y postoperatively; E1) and long‐term (at least 4y postoperatively; E2) changes in hamstring muscle‐tendon length (MTL) and lengthening velocity after hamstring lengthening in children with bilateral cerebral palsy (CP). Method Three‐dimensional gait analysis was performed in 19 children (16 males, 3 females; 36 limbs;...

The principles underlying smooth and effortless human walking while maintaining stability as well as the ability to quickly respond to unexpected perturbations result from a plethora of well-balanced parameters, most of them yet to be determined. In this paper, we investigate criteria that may be useful for benchmarking stability properties of huma...

Purpose Purpose of the present cohort study was the determination of lower body function and rotation in patients with symptomatic component mal-rotation after total knee arthroplasty using instrumented 3D gait analysis. Methods A consecutive series of 12 patients (61.3 years ± 11.4 years) were included suffering under remaining pain or limited ra...

Aim To evaluate the influence of supracondylar femoral derotation osteotomy (FDO) on hip abduction muscle force and frontal hip moments in children with bilateral cerebral palsy. Method For this retrospective cohort study 79 children (36 females, 43 males; mean age at surgery 11y [SD 3y]; range 4–17y) with bilateral cerebral palsy and preoperative...

Background: Walking on inclined surfaces is an everyday task, which challenges stability and propulsion even in healthy adults. Children with cerebral palsy adapt similarly to inclines like healthy children do. However, how stability and propulsion in these subjects are influenced by different inclines remained unaddressed as of yet. Research que...

Modeling the socket and residual limb for trans femoral amputees using a virtual joint concept.

Assessment of angular momentum and harmonic ratio for children with cerebral palsy during walking.

The motion data of three patients with cerebral palsy were used to analyze velocity, stride length and stride time parameters during walk to run transition. The results showed that subjects were able to perform the transition while keeping their dynamic equilibrium.

Background: Deterioration of gait in adolescent and adult patients with cerebral palsy can be associated with multiple factors. Multilevel surgery (MLS) is one option in adults with cerebral palsy to improve gait function with encouraging short-term results. It is a question whether these improvements are maintained over time. Methods: In a retr...

Background: Individuals with trans-tibial amputation show a greater peak prosthetic ankle power (push- off) when using energy storing and returning (ESAR) prosthetic feet as compared to solid-ankle cushion-heel feet. ESAR feet further contribute to the users' body support and thus limit prosthetic ankle motion. To improve ankle motion, articulatin...

The aim of this study was to estimate the dorsi-plantar flexion moment created by the ventral shell in partial foot prosthesis. The use of a pressure pad enabled a biomechanical approach to calculate the moment applied through the shank in different prostheses. The characteristics of the estimated moment applied at the shank fit the dorsi-plantarfl...

Zusammenfassung Der Beitrag beschreibt Entwicklung von instrumentierten Gelenken, die in existierende Orthesen integriert werden und Momente in allen Ebenen registrieren, und deren Anwendung zur Charakterisierung der Muskelfunktion des Patienten und zur Optimierung des Aufbaus bei orthopädietechnischen Versorgung. Einführung Größe, Sperrigkeit und...