3,946 results match your criteria Clinical Biomechanics [Journal]


In vitro assessment of connection strength and stability of internal implant-abutment connections.

Clin Biomech (Bristol, Avon) 2019 Mar 13;65:92-99. Epub 2019 Mar 13.

Biomet 3i, LLC, a Zimmer Biomet company, 4555 Riverside Drive, Palm Beach Gardens, FL, United States.

Background: Various connections have been machined to improve the fit between the dental abutment and implant. In vivo, the instability created by imprecisely fitting components can cause soft tissue irritation and bacterial colonization of the implant system. The aim of this study was to quantify abutment stability under in vitro force applications. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S02680033183096
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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.007DOI Listing
March 2019
1 Read

Correlation between preoperative imaging parameters and postoperative basic kinematics-based functional outcome in patients with tibial plateau fractures.

Clin Biomech (Bristol, Avon) 2019 Apr 16;65:87-91. Epub 2019 Apr 16.

Division of Orthopedics, Tel-Aviv Sourasky Medical Center, Tel Aviv, Israel.

Background: Functional scores and radiographs are often used to assess function and predict development of osteoarthritis in patients with multi-fragmentary tibial plateau fractures (TPFs). Locomotion, which is the primary goal of fracture treatment, is rarely assessed. The objective of this study was to assess functional ability of patients after TPF fixation using spatio-temporal gait analysis (STGA), and to compare STGA variables with self-reported functional scores and preoperative fracture characteristics. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.04.009DOI Listing

First results of multicortical screw anchoring compared with conventional bicortical screw placement in the sacrum: A biomechanical investigation of a new screw design.

Clin Biomech (Bristol, Avon) 2019 Apr 15;65:100-104. Epub 2019 Apr 15.

Department for Orthopaedic and Trauma Surgery, Faculty of Medicine, University Hospital of Cologne, Joseph-Stelzmann Strasse 24, 50931 Cologne, Germany. Electronic address:

Background: Bicortical screw fixation is an established technique to increase screw strength in vertebral bodies, although it is associated with several complications, for example screw-loosening. Cement augmentation can increase stability of screw-fixation but can also cause various complications, such as cement-leakage or cement embolism. In this study, we tested a new, multicortical screw fixation technique in the sacrum. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.04.007DOI Listing

Asymmetric biomechanical characteristics of the paravertebral muscle in adolescent idiopathic scoliosis.

Clin Biomech (Bristol, Avon) 2019 Mar 19;65:81-86. Epub 2019 Mar 19.

Ultrasonic Department, Beijing Chao-Yang Hospital, Capital Medical University, GongTiNan Road 8#, Chaoyang District, Beijing 100020, China.

Background: We sought to assess the biomechanical properties of the paravertebral muscles in adolescent idiopathic scoliosis patients with Lenke Type 1, 2, or 3 (Lenke 1-3) curves.

Methods: The MyotonPro® and shear wave elasticity imaging system were used to assess the biomechanical features of the thoracic paravertebral muscles on concave and convex side in adolescent idiopathic scoliosis patients with Lenke 1-3 curves. The Cobb angle of the main curve was measured using the anteroposterior whole spine radiograph in the standing position. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.013DOI Listing

High flow nasal cannula: Influence of gas type and flow rate on airway pressure and CO clearance in adult nasal airway replicas.

Clin Biomech (Bristol, Avon) 2019 Apr 6;65:73-80. Epub 2019 Apr 6.

Department of Mechanical Engineering, University of Alberta, Edmonton, AB, Canada. Electronic address:

Background: High flow nasal cannula therapy is a form of respiratory support which delivers high flow rates of heated, humidified gas to the nares via specialized cannula. Two primary mechanisms of action attributed to the therapy are the provision of positive airway pressure as well as clearance of CO-rich exhaled gas from the upper airways.

Methods: Physiologically accurate nose-throat airway replicas were connected at the trachea to a lung simulator, where CO was supplied to mimic the CO content in exhaled gas. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.04.004DOI Listing

Experimental cervical interspinous ligament pain altered cervical joint motion during dynamic extension movement.

Clin Biomech (Bristol, Avon) 2019 Apr 3;65:65-72. Epub 2019 Apr 3.

SMI, Department of Health and Science Technology, Faculty of Medicine, Aalborg University, Denmark. Electronic address:

Background: Although the cervical interspinous ligament is a potential source of neck pain, the effects on cervical joint motion and pressure pain sensitivity has never been investigated. The understanding of the relationship will broaden our understanding of cervical biomechanics and improve diagnosis and treatment of neck pain.

Methods: Fluoroscopy videos of cervical flexion and extension movements and pressure pain thresholds over bilateral C2/C3 and C5/C6 facet joints were collected in fifteen healthy subjects before and after injections of hypertonic and isotonic saline in C4/C5 ISL. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.04.002DOI Listing

Comparison of finite helical axes of normal and anatomically designed prosthetic knees.

Clin Biomech (Bristol, Avon) 2019 Apr 5;65:57-64. Epub 2019 Apr 5.

Department of Orthopaedic Biomaterial Science, Osaka university Graduate school of Medicine, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan.

Background: Describing three-dimensional joint motion using the finite helical axis has an advantage in understanding unknown coupling motion in prosthetic knee joints. We aimed to examine the differences in the orientations of finite helical axis of normal and anatomically designed cruciate-retaining and posterior-stabilized prosthetic knees after total knee arthroplasty.

Methods: Ten normal, 40 cruciate-retaining prosthetic knees of 33 patients and 19 posterior-stabilized prosthetic knees of 14 patients enabling to flex > 120° were analyzed during a squatting motion with deep knee bending. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S02680033183029
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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.018DOI Listing
April 2019
2 Reads

Persons with femoroacetabular impingement syndrome exhibit altered pelvifemoral coordination during weightbearing and non-weightbearing tasks.

Clin Biomech (Bristol, Avon) 2019 Apr 4;65:51-56. Epub 2019 Apr 4.

Division of Biokinesiology & Physical Therapy, University of Southern California, 1540 Alcazar Street, CHP-155, Los Angeles, CA 90740, USA. Electronic address:

Background: Previous studies have reported that persons with femoroacetabular impingement syndrome (FAIS) have diminished posterior tilt of the pelvis during functional tasks. It is not known how this movement impairment impacts pelvifemoral coordination during weightbearing and non-weightbearing movements.

Methods: Fifteen persons with a diagnosis of FAIS and 15 matched controls performed a deep squat (weightbearing) and a maximum height stepping task (non-weightbearing). Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.04.003DOI Listing
April 2019
1 Read

A difference in rotational alignment of the tibio-femoral joint after anterior cruciate ligament reconstruction between the bone-patellar tendon-bone and semitendinosus-gracilis grafts.

Clin Biomech (Bristol, Avon) 2019 Mar 21;65:45-50. Epub 2019 Mar 21.

Anshin Hospital, 1-4-12, Minatojima Minamimachi, Chuo-ku, Kobe City, Hyogo, Japan.

Background: A question as to the effect of the graft choice on rotational kinematics after anterior cruciate ligament reconstruction remains unclear. The purpose of this study was to determine if there were any differences in rotational alignment of the knee after anterior cruciate ligament (ACL) reconstruction using bone-patellar tendon-bone (BTB) graft compared to that using semitendinosus-gracilis (STG) graft.

Methods: Ten patients with BTB graft and 10 patients with STG graft were assessed at 3 months after ACL reconstruction. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.015DOI Listing
March 2019
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Cement augmentation as revision strategy for loosened thick-diameter non-fenestrated iliac screws - A biomechanical analysis.

Clin Biomech (Bristol, Avon) 2019 Apr 3;65:41-44. Epub 2019 Apr 3.

Laboratory for Biomechanics and Biomaterials, Hannover Medical School, Anna-von Borries-Str. 1-7, 30625 Hannover, Germany.

Background: Loosened/pulled-out iliac screws can be a challenging complication, as revision opportunities are limited because more distal anchorage is impossible. Insertion of thick-diameter screws is an option in cases with loosened thin-diameter screws. However, this is occasionally infeasible in patients with loosened thick-diameter screws. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.04.001DOI Listing

Influence of gender, age, shelf-life, and conservation method on the biomechanical behavior of colon tissue under dynamic solicitation.

Clin Biomech (Bristol, Avon) 2019 Mar 28;65:34-40. Epub 2019 Mar 28.

Department of Visceral Surgery, AP-HM Hôpital Nord, Aix-Marseille University, France; Biomechanical Applied Laboratory, UMRT24, IFSTTAR, Aix-Marseille University, France. Electronic address:

Background: Data from biomechanical tissue sample studies of the human digestive tract are highly variable. The aim of this study was to investigate 4 factors which could modify the mechanical response of human colonic specimens placed under dynamic solicitation until tissue rupture: gender, age, shelf-life and conservation method.

Methods: We performed uniaxial dynamic tests of human colonic specimens. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.017DOI Listing

Selective dorsal rhizotomy improves muscle forces during walking in children with spastic cerebral palsy.

Clin Biomech (Bristol, Avon) 2019 Mar 20;65:26-33. Epub 2019 Mar 20.

Department of Kinesiology, KU Leuven, Leuven, Belgium.

Background: Selective dorsal rhizotomy aims to reduce spasticity in children with cerebral palsy. Early investigations indicated postoperative weakness, whereas more recent studies showed that selective dorsal rhizotomy either does not change or improves muscle strength. All previous studies assessed muscle strength in a static position, which did not represent the walking situation. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.014DOI Listing
March 2019
4 Reads

Insert conformity variation affects kinematics and wear performance of total knee replacements.

Clin Biomech (Bristol, Avon) 2019 Mar 29;65:19-25. Epub 2019 Mar 29.

State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, No.28, Xianning West Road, Xi'an, 710049, China; Tribology Research Institute, School of Mechanical Engineering, Southwest Jiaotong University, Xibu Yuanqu, Gaoxin District, Chengdu 610031, China; Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, UK.

Background: The insert conformity is a critical factor for successful total knee replacement which must be considered in design of the implant. However, the effects of conformity on knee kinematics and wear under physiological environment are often neglected in previous studies. The present study involved evaluating the biomechanics and wear performance with regard to different insert conformity in total knee replacement. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.016DOI Listing
March 2019
2 Reads

Effect of corporal suspension and pendulum exercises on neuromuscular properties and functionality in patients with medullar thoracic injury.

Clin Biomech (Bristol, Avon) 2019 Mar 23;63:214-220. Epub 2019 Feb 23.

Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.

Background: Traumatic spinal cord injury (TSCI) is one of the most devastating injuries that has a physical impact on patients. The CHORDATA® method involves suspension and pendulous exercises and has been clinically used to treat patients with TSCI. Although empirically used to treat neurological patients, there is no scientific evidence of the efficacy of this method. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.012DOI Listing
March 2019
8 Reads

Comparison of scapular upward rotation during arm elevation in the scapular plane in healthy volunteers and patients with rotator cuff tears pre- and post-surgery.

Clin Biomech (Bristol, Avon) 2019 Mar 19;63:207-213. Epub 2019 Mar 19.

Institute of Biomechanics, Nobuhara Hospital, 720 Haze, Issai-cho, Tatsuno-city, Hyogo, Japan.

Background: Function loss caused by rotator cuff tears alters the scapular orientation, however, few prior studies have reported on scapular movements after rotator cuff repair. The purpose was to determine the scapular orientations before and after rotator cuff repair.

Methods: We recruited 14 healthy controls, 10 small and six massive rotator cuff tear in patients. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.012DOI Listing

Magnetic resonance imaging T1 and T2 mapping provide complementary information on the bone mineral density regarding cancellous bone strength in the femoral head of postmenopausal women with osteoarthritis.

Clin Biomech (Bristol, Avon) 2019 Mar 20;65:13-18. Epub 2019 Mar 20.

Department of Orthopedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Japan.

Background: Since bone mass is not the only determinant of bone strength, there has been increasing interest in incorporating the bone quality into fracture risk assessments. We aimed to examine whether the magnetic resonance imaging (MRI) T1 or T2 mapping value could provide information that is complementary to bone mineral density for more accurate prediction of cancellous bone strength.

Methods: Four postmenopausal women with hip osteoarthritis underwent 3. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.010DOI Listing
March 2019
2 Reads

Predictors of shoulder pain in manual wheelchair users.

Clin Biomech (Bristol, Avon) 2019 Mar 6;65:1-12. Epub 2019 Mar 6.

Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX, USA. Electronic address:

Background: Manual wheelchair users rely on their upper limbs to provide independent mobility, which leads to high muscular demand on their upper extremities and often results in shoulder pain and injury. However, the specific causes of shoulder pain are unknown. Previous work has shown that decreased shoulder muscle strength is predictive of shoulder pain onset, and others have analyzed joint kinematics and kinetics, propulsion technique and intra-individual variability for their relation to shoulder pathology. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.003DOI Listing

Kinematic characteristics of arm and trunk when drinking from a glass in children with and without cerebral palsy.

Clin Biomech (Bristol, Avon) 2019 Mar 19;63:201-206. Epub 2019 Mar 19.

Department of Physical Therapy, Federal University of São Carlos, Rodovia Washington Luís, São Carlos, Brazil.

Background: Children with cerebral palsy (CP) often have difficulty with activities that require the upper extremities secondary to deficits in strength and range of motion, spasticity, and poor timing and coordination of movement. This study aimed to identify and compare timing and coordination of the trunk and upper extremity in children with and without CP during a functional task.

Methods: Eighteen children, N = 9 with CP and N = 9 with typical development were enrolled. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S02680033183051
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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.011DOI Listing
March 2019
6 Reads

Impact of stem taper damage on the fracture strength of ceramic heads with adapter sleeves.

Clin Biomech (Bristol, Avon) 2019 Mar 20;63:193-200. Epub 2019 Mar 20.

Institute of Biomechanics, TUHH Hamburg University of Technology, Denickestrasse 15, 21073 Hamburg, Germany. Electronic address:

Background: Using a new ceramic head with a titanium adapter sleeve offers the possibility of maintaining a well fixed stem when conducting cup revision of a total hip arthroplasty. The aim of this study is to test the impact of stem taper damage on the fracture strength of sleeved ceramic heads.

Methods: Pristine zirconia-toughened alumina heads with titanium adapter sleeves (BIOLOX®OPTION System) were tested on damaged Ti-4Al-6V stem tapers in accordance with ISO7206-10. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.005DOI Listing
March 2019
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The influence of cavity preparation and press-fit cup implantation on restoring the hip rotation center.

Clin Biomech (Bristol, Avon) 2019 Mar 20;63:185-192. Epub 2019 Mar 20.

TUHH, Hamburg University of Technology, Institute of Biomechanics, Denickestrasse 15, 21073 Hamburg, Germany.

Background: Reaming of the acetabular cavity and cup implantation directly influence the hip rotation center and contact area between implant and bone. Previous studies have reported on an altered rotation center after total hip arthroplasty, but have not studied the influence of reaming and cup implantation separately. Aim of this study was therefore to analyze the individual influence of acetabular reaming and subsequent cup implantation on the rotation center and how this influences the contact conditions at the bone-implant interface. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.006DOI Listing
March 2019
1 Read

The stabilization effect of the conjoint tendon in reverse total shoulder arthroplasty.

Clin Biomech (Bristol, Avon) 2019 Mar 13;63:179-184. Epub 2019 Mar 13.

Department of Orthopaedic Surgery, Medical School Hannover, Hannover, Germany. Electronic address:

Background: Numerous factors determine stability of reverse total shoulder arthroplasty. The effect of the conjoint tendon in relation to stability remains unknown. In this biomechanical study, we evaluated the influence of the conjoint tendon on the anterior stability of reverse total shoulder arthroplasty with a hemispherical glenosphere and a glenosphere with 9 mm lateralisation. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S02680033183098
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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.009DOI Listing
March 2019
6 Reads

Fracture strength of the proximal femur injected with a calcium sulfate/hydroxyapatite bone substitute.

Clin Biomech (Bristol, Avon) 2019 Mar 13;63:172-178. Epub 2019 Mar 13.

Department of Biomedical Engineering, Lund University, Box 118, 221 00 Lund, Sweden; Department of Orthopedics, Clinical Sciences, Lund University, Box 118, 221 00 Lund, Sweden. Electronic address:

Background: Available interventions for preventing fragility hip fractures show limited efficacy. Injection of a biomaterial as bone substitute could increase the fracture strength of the hip. This study aimed to show the feasibility of injecting a calcium sulfate/hydroxyapatite based biomaterial in the femoral neck and to calculate the consequent change in strength using the finite element method. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.008DOI Listing
March 2019
2 Reads

Socket size adjustments in people with transtibial amputation: Effects on residual limb fluid volume and limb-socket distance.

Clin Biomech (Bristol, Avon) 2019 Mar 2;63:161-171. Epub 2019 Mar 2.

Department of Bioengineering, 355061, 3720 15th Ave NE, University of Washington, Seattle, WA 98105, USA. Electronic address:

Background: Small intermittent adjustments of socket size using adjustable sockets may be a means for people with transtibial amputation to better maintain residual limb fluid volume and limb position while using a prosthesis.

Methods: Socket size, limb fluid volume, and distance from the limb to the socket, termed "sensed distance," were recorded while participants with transtibial amputation walked on a treadmill wearing a motor-driven, cabled-panel, adjustable socket. Researchers made frequent socket size adjustments using a mobile phone app to identify participants' acceptable socket size range. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.022DOI Listing

There is an individual tolerance to mechanical loading in compression induced deep tissue injury.

Clin Biomech (Bristol, Avon) 2019 Mar 23;63:153-160. Epub 2019 Feb 23.

Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands.

Background: Deep tissue injury is a type of pressure ulcer which originates subcutaneously due to sustained mechanical loading. The relationship between mechanical compression and damage development has been extensively studied in 2D. However, recent studies have suggested that damage develops beyond the site of indentation. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.015DOI Listing

Non-traumatic chronic shoulder pain is not associated with changes in rotator cuff interval tendon thickness.

Clin Biomech (Bristol, Avon) 2019 Mar 2;63:147-152. Epub 2019 Mar 2.

Department of Physiotherapy, University of Malaga, Spain.

Objective: To determine whether the thickness of the rotator interval tendons is different when comparing both symptomatic and non-symptomatic sides in people with chronic shoulder pain, and to those free of pain. Furthermore, to calculate the level of association between the rotator interval tendon thicknesses and perceived shoulder pain-function.

Design: A cross-sectional, observational study. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.011DOI Listing

Sit-to-walk performance in Parkinson's disease: A comparison between faller and non-faller patients.

Clin Biomech (Bristol, Avon) 2019 Mar 5;63:140-146. Epub 2019 Mar 5.

Department of Neurology, University Hospital and Julius-Maximilian-University, Josef-Schneider-Str. 11, 97080 Würzburg, Germany; Centro Parkinson ASST G. Pini-CTO, via Bignami 1, 20126 Milan, Italy. Electronic address:

Background: Falls are one of the main concerns in people with Parkinson's disease, leading to poor quality of life and increased mortality. The sit-to-walk movement is the most frequent postural transition task during daily life and is highly demanding in terms of balance maintenance and muscular strength.

Methods: With the aim of identifying biomechanical variables of high risk of falling, we investigated the sit-to-walk task performed by 9 Parkinson's disease patients with at least one fall episode in the six months preceding this study, 15 Parkinson's disease patients without previous falls, and 20 healthy controls. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.002DOI Listing
March 2019
2 Reads

How does a novel knitted titanium nucleus prosthesis change the kinematics of a cervical spine segment? A biomechanical cadaveric study.

Clin Biomech (Bristol, Avon) 2019 Mar 5;63:134-139. Epub 2019 Mar 5.

Medical University Innsbruck, Trauma Surgery, Innsbruck, Austria.

Background: Total disc replacement is a possible treatment alternative for patients with degenerative disc disease, especially in the cervical spine. The aim is to restore the physiological flexibility and biomechanical behavior. A new approach based on these requirements is the novel nucleus prosthesis made of knitted titanium wires. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S02680033183050
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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.001DOI Listing
March 2019
5 Reads

Quantification of trunk segmental coordination and head stability in laterally unstable sitting identifies aging and cerebellar ataxia.

Clin Biomech (Bristol, Avon) 2019 Mar 9;63:127-133. Epub 2019 Mar 9.

Department of Physical Therapy, Saitama Prefectural University, Saitama, Japan.

Background: We quantified trunk segmental coordination and head stability in unstable sitting and investigated whether it can discriminate postural control, age-related differences and presence of coordination disorder.

Methods: Subjects were a healthy younger group (n = 7), a healthy elderly group (n = 7), and a cerebellar ataxia group (n = 8). The motion sensors and surface electrodes were located on the trunk and/or head segments to measure angle displacements, acceleration and electromyograms in unstable sitting during a lateral tilt task. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.01.013DOI Listing
March 2019
1 Read

Does the cleat model interfere with ankle sprain risk factors in artificial grass?

Clin Biomech (Bristol, Avon) 2019 Mar 6;63:119-126. Epub 2019 Mar 6.

Physiotherapy Department, School of Health, Polytechnic Institute of Porto, Center for Rehabilitation Research (CIR) - Center of Studies of Human Movement and Activity, Rua Dr. António Bernardino de Almeida, 400, 4200-072 Porto, Portugal. Electronic address:

Background: The cleats-surface interaction has been described as a possible risk factor for lateral ankle sprain. However, their interaction is still unknown in individuals with chronic ankle instability. The purpose of this study was to determine the influence of different soccer cleats on kinematic, kinetic and neuromuscular ankle variables on artificial grass in soccer players with and without chronic ankle instability. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.03.004DOI Listing
March 2019
1 Read

Structural damage and motion rhythm of the spine and hip during trunk lateral bending in ankylosing spondylitis patients with mild to moderate radiographic signs.

Clin Biomech (Bristol, Avon) 2019 Mar 23;63:112-118. Epub 2019 Feb 23.

Department of Microbiology & Immunology of National Cheng Kung University, Tainan, Taiwan, ROC.

Background: Ankylosing spondylitis causes structural damage and motion restriction in spine. The study was designed to assess structural damage and incoordination pattern between the spine and hip during trunk lateral bending in ankylosing spondylitis.

Methods: Twenty-three healthy adults and 39 adults with ankylosing spondylitis were recruited from a tertiary care medical centre. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.013DOI Listing
March 2019
1 Read
1.880 Impact Factor

Trunk muscle forces and spinal loads in persons with unilateral transfemoral amputation during sit-to-stand and stand-to-sit activities.

Clin Biomech (Bristol, Avon) 2019 Mar 27;63:95-103. Epub 2019 Feb 27.

F. Joseph Halcomb III, M.D. Department of Biomedical Engineering, University of Kentucky, Lexington, KY 40506, USA. Electronic address:

Background: Alterations and asymmetries in trunk motions during activities of daily living, involving lower extremities, are suggested to cause higher spinal loads in persons with unilateral lower limb amputation. Given the repetitive nature of most activities of daily living, knowledge of the amount of increase in spinal loads is important for designing interventions aimed at prevention of secondary low back pain due to potential fatigue failure of spinal tissues. The objective of this study was to determine differences in trunk muscle forces and spinal loads between persons with and without lower limb amputation when performing sit-to-stand and stand-to-sit tasks. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.021DOI Listing
March 2019
10 Reads

Impact of intraoperative adjustment method for increased flexion gap on knee kinematics after posterior cruciate ligament-sacrificing total knee arthroplasty.

Clin Biomech (Bristol, Avon) 2019 Mar 27;63:85-94. Epub 2019 Feb 27.

Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.

Background: In general, the flexion gap is larger than the extension gap with posterior cruciate ligament-sacrificing total knee arthroplasty. Several methods compensate for an excessive flexion gap, but their effects are unknown. The purpose of this study was to compare three methods to compensate for an increased flexion gap. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.018DOI Listing
March 2019
1 Read

Detection of bridging veins rupture and subdural haematoma onset using a finite element head model.

Clin Biomech (Bristol, Avon) 2019 Mar 1;63:104-111. Epub 2019 Mar 1.

TEMA: Center of Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, Portugal. Electronic address:

Background: One of the most severe traumatic brain injuries, the subdural haematoma, is related to damage and rupture of the bridging veins, generating an abnormal collection of blood between the dura mater and arachnoid mater. Current numerical models of these vessels rely on very simple geometries and material laws, limiting its accuracy and bio-fidelity.

Methods: In this work, departing from an existing human head numerical model, a realistic geometry for the bridging veins was developed, devoting special attention to the finite elements type employed. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.010DOI Listing
March 2019
1 Read

The impact of configuration of the Ilizarov fixator on its stiffness and the degree of loading of distraction rods.

Clin Biomech (Bristol, Avon) 2019 Mar 27;63:79-84. Epub 2019 Feb 27.

Wrocław University of Science and Technology, Department of Biomedical Engineering, Mechatronics and Theory of Mechanisms, Łukasiewicza 7/9, 50-371 Wrocław, Poland.

Background: The mechanical parameters of the Ilizarov fixator are influenced by many factors related to its spatial configuration. The aim of this study was to experimentally evaluate the impact of the type of implant and the number of distraction rods on the uniformity of loading of distraction rods and stiffness coefficients of the Ilizarov fixator.

Methods: The tests were carried out on a physical model. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.020DOI Listing
March 2019
2 Reads

Are there benefits of a 2D gait analysis in the evaluation of the subtalar extra-articular screw arthroereisis? Short-term investigation in children.

Clin Biomech (Bristol, Avon) 2019 Mar 27;63:73-78. Epub 2019 Feb 27.

Center for Orthopaedics and Trauma Surgery, University Hospital Giessen and Marburg, Baldingerstraße, 35043 Marburg, Germany.

Background: A juvenile flexible flatfoot is a common abnormality during growth. For children with a pathological manifestation, subtalar extra-articular screw arthroereisis is a popular operative technique. Although this minimally invasive operation technique has been performed for >45 years, complications still occasionally occur. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.019DOI Listing

Three-dimensional functional workspace of thumb prehension.

Clin Biomech (Bristol, Avon) 2019 Mar 27;63:63-72. Epub 2019 Feb 27.

Shriners Hospitals for Children Northern California, Sacramento, CA, United States; Department of Orthopaedic Surgery, University of California San Francisco, San Francisco, CA, United States. Electronic address:

Background: Clinical assessment of thumb motion is challenging, due to the complex anatomy and motion of the thumb. It is especially difficult to measure hand movement during activity, and to measure the effects of surgery that changes the morphology of the thumb. A three-dimensional model of the hand may enable clinicians to better assess prehension and thumb motion at baseline, and following surgical intervention. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.017DOI Listing

The effect of joint translation constraint on within-participant variability of kinematics and kinetics during running in cerebral palsy.

Clin Biomech (Bristol, Avon) 2019 Mar 15;63:54-62. Epub 2019 Feb 15.

School of Physiotherapy and Exercise Science, Curtin University, Perth, Western Australia, Australia.

Background: Biomechanical data in cerebral palsy are inherently variable but no optimal model of translational joint constraint has been identified. The primary aim of this study was to determine which model of translational joint constraint resulted in the lowest within-participant variability of lower limb joint angles and moments. The secondary aim was to determine which model best distinguished known functional groups in Cerebral Palsy. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.003DOI Listing
March 2019
9 Reads

Assessment of hip fracture risk by cross-sectional strain-energy derived from image-based beam model.

Clin Biomech (Bristol, Avon) 2019 Mar 23;63:48-53. Epub 2019 Feb 23.

Department of Mechanical Engineering, University of Manitoba, Winnipeg, Canada.

Background: Clinicians have been looking for a simple and effective biomechanical tool for the assessment of hip fracture risk. Dual-energy X-ray absorptiometry (DXA) is currently the primary bone imaging modality in clinic, and the engineering beam is the simplest model for a mechanical analysis. Therefore, we developed a DXA-based beam model for the above purpose. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S02680033183071
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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.016DOI Listing
March 2019
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Perturbation-evoked lateral steps in older adults: Why take two steps when one will do?

Clin Biomech (Bristol, Avon) 2019 Mar 23;63:41-47. Epub 2019 Feb 23.

University of Maryland School of Medicine, Department of Physical Therapy and Rehabilitation Sciences, Baltimore, MD, USA. Electronic address:

Background: Hip fractures in older adults often result from a fall in the lateral direction. While younger adults tend to recover balance from a lateral perturbation with a single lateral sidestep, older adults are prone to multistep responses which are associated with an increased fall risk. This study compared the stepping characteristics and stability of single and multistep responses to lateral perturbation in healthy older adults. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.014DOI Listing
March 2019
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Comparison of ISO 14243-1 to ASTM F3141 in terms of wearing of knee prostheses.

Clin Biomech (Bristol, Avon) 2019 Mar 15;63:34-40. Epub 2019 Feb 15.

School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China; Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China. Electronic address:

Background: The wear properties of knee implants need to be thoroughly evaluated prior to clinical use to ensure implant longevity. ISO 14243-1:2009 and ASTM F3141-17 are the two standards typically used for evaluating wear, with the ISO standard being more common; ASTM F3141-17 was first released in 2015. The aim of this study is to compare differences between these two standards in terms of wearing on a knee prosthesis. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.008DOI Listing

Effects of myofascial release in erector spinae myoelectric activity and lumbar spine kinematics in non-specific chronic low back pain: Randomized controlled trial.

Clin Biomech (Bristol, Avon) 2019 Mar 14;63:27-33. Epub 2019 Feb 14.

Department of Anatomy and Human Embryology, Universitat de València, Valencia, Spain.

Background: Flexion-relaxation response of the lumbar erector spinae has been previously studied after different interventions such as exercise programs or spinal manipulation, in subjects with chronic low back pain. The objective of the study was to investigate the effects of an isolated myofascial release protocol on erector spinae myoelectric activity and lumbar spine kinematics in chronic low back pain.

Methods: Thirty-six participants, with nonspecific chronic low back pain, were randomized to myofascial release group (n = 18) receiving four sessions of myofascial treatment, each lasting 40 min, and to control group (n = 18) receiving a sham myofascial release. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.009DOI Listing
March 2019
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Screws with larger core diameter and lower thread pitch increase the stability of locked plating in osteoporotic proximal humeral fractures.

Clin Biomech (Bristol, Avon) 2019 Mar 14;63:21-26. Epub 2019 Feb 14.

Department of Trauma, Hand and Reconstructive Surgery, University Hospital Münster, Albert-Schweitzer-Campus 1, building W1, 48149 Münster, Germany.

Background: Little is known about the screw design as a factor for stability of the bone-implant interface in locking plate fixation of proximal humeral fractures. Aim of the present study was to analyze if locking screws with a large core diameter and a low thread pitch provide increased stability when compared to conventional locking screws.

Methods: 3-Part proximal humeral fractures were created in ten pairs of osteoporotic human cadaveric humeri and fixed with a locking plate. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.006DOI Listing

Ultrasound melted polymer sleeve for improved primary pedicle screw anchorage: A novel augmentation technique.

Clin Biomech (Bristol, Avon) 2019 Mar 14;63:16-20. Epub 2019 Feb 14.

Department of Trauma Surgery, Medical University of Innsbruck, Innsbruck, Austria. Electronic address:

Background: Cement augmentation of pedicle screws to prevent screw loosening is associated with significant complications, such as cement leakage or bone necrosis. Therefore, an alternative strategy to improve pedicle screw anchorage has been recently developed: Polymer reinforcement of pedicle screws uses an in situ melted polymer sleeve in order to enhance screw anchorage. This biomechanical study evaluated the effect of polymer-reinforcement by comparing polymer-reinforced pedicle screws to non-augmented as well as cement-augmented screws under cyclic loading. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S02680033183083
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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.007DOI Listing
March 2019
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Mechanical analysis of femoral stress-riser fractures.

Clin Biomech (Bristol, Avon) 2019 Mar 14;63:10-15. Epub 2019 Feb 14.

Department of Orthopaedic Surgery, Gangnam Sacred Heart Hospital, Hallym University School of Medicine, Seoul, Republic of Korea. Electronic address:

Background: A stress-riser fracture develops when stress in an object is higher than that in the surrounding material. The aim of this retrospective study was to evaluate all consecutive femoral stress-riser fractures during a period of >10 years and to verify high-risk factors by using mechanical analysis.

Methods: Forty clinical fractures caused by local stress concentration in the femoral cortical bone were included. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.004DOI Listing
March 2019
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Effect of wear, acetabular cup inclination angle, load and serum degradation on the friction of a large diameter metal-on-metal hip prosthesis.

Authors:
Vesa Saikko

Clin Biomech (Bristol, Avon) 2019 Mar 13;63:1-9. Epub 2019 Feb 13.

Aalto University School of Engineering, Department of Mechanical Engineering, PO Box 14300, FI-00076 Aalto, Finland. Electronic address:

Background: The large-scale clinical problem caused by unacceptable tribological behaviour of certain large diameter metal-on-metal prosthetic hips has directed attention to adverse condition testing. High metal-on-metal wear is connected with adverse reaction to metal debris. Friction is important because high friction may be associated with high wear, risk the fixation of the cup, and cause detrimental heating of periprosthetic tissues. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.005DOI Listing
March 2019
2 Reads

Effect of humeral tray placement on impingement-free range of motion and muscle moment arms in reverse shoulder arthroplasty.

Clin Biomech (Bristol, Avon) 2019 Feb 5;62:136-143. Epub 2019 Feb 5.

Department of Human Biology, University of Cape Town, Cape Town, South Africa. Electronic address:

Background: It has been suggested that onlay humeral tray placement in reverse shoulder arthroplasty can affect impingement and muscle functionality. This study investigates biomechanical changes to the reversed shoulder using a variety of tray positional configurations.

Methods: The reconstructed scapula and humerus from 12 CT scans were used to customise a 3D biomechanical model of the shoulder. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.002DOI Listing
February 2019

Kinematic and kinetic differences between military patients with patellar tendinopathy and asymptomatic controls during single leg squats.

Clin Biomech (Bristol, Avon) 2019 Feb 4;62:127-135. Epub 2019 Feb 4.

National Centre for Sport and Exercise Medicine, School of Sport Exercise and Health Sciences, Loughborough University, UK.

Background: Knee valgus alignment has been associated with lower-limb musculoskeletal injury. This case-control study aims to: assess biomechanical differences between patients with patellar tendinopathy and healthy controls.

Methods: 43 military participants (21 cases, 22 controls) were recorded using 3D-motion capture performing progressively demanding, small knee bend, single leg and single leg decline squats. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.02.001DOI Listing
February 2019
1 Read

Biomechanical testing of different posterior fusion devices on lumbar spinal range of motion.

Clin Biomech (Bristol, Avon) 2019 Feb 1;62:121-126. Epub 2019 Feb 1.

Center for Trauma and Orthopedic Surgery, Gemeinschaftsklinikum Mittelrhein, Ev. Stift Koblenz, Germany. Electronic address:

Background: Recent minimal-invasive posterior fusion devices are supposed to provide stability and obtain fusion in combination with interbody cages in the instrumented segment. The aim of the present study is to evaluate the primary stability of two minimal-invasive posterior prototypes compared to an established spinous process plate and standard pedicle screw instrumentation.

Methods: Seven fresh frozen human cadaver lumbar spines (L2-L5) were tested in a spinal testing device with a moment of 7. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.01.012DOI Listing
February 2019

Normative parameters and anthropometric variability of lumbar muscle stiffness using ultrasound shear-wave elastography.

Clin Biomech (Bristol, Avon) 2019 Feb 30;62:113-120. Epub 2019 Jan 30.

School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA.

Background: Quantifying stiffness of the lumbar spine musculature using shear-wave elastography (SWE) maybe beneficial in the diagnosis and treatment of non-specific low back pain (LBP). The primary purpose of this study was to establish normative parameter and variance estimates of lumbar spine muscle stiffness at rest and during submaximal contraction levels using SWE in healthy individuals. A second aim was to determine the relationship between lumbar spine muscle stiffness and a variety of demographic, anthropometric, and medical history variables. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.01.010DOI Listing
February 2019
1 Read

Do the center of mass strategies change with restricted vision during the sit-to-stand task?

Clin Biomech (Bristol, Avon) 2019 Feb 31;62:104-112. Epub 2019 Jan 31.

Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran.

Background: The relationship between the visual sensory and center-of-mass characteristics during the sit-to-stand task is not well documented. Do the center of mass strategies change with restricted vision during the sit-to-stand task?

Methods: The participants in this study were fifteen girls with congenital blindness (age (94.6 (5. Read More

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http://dx.doi.org/10.1016/j.clinbiomech.2019.01.011DOI Listing
February 2019
3 Reads