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https://www.readbyqxmd.com/read/29130040/effect-of-computer-navigation-on-accuracy-and-reliability-of-limb-alignment-correction-following-open-wedge-high-tibial-osteotomy-a-meta-analysis
#1
Seung-Beom Han, Hyun Jung Kim, Dae-Hee Lee
Background: It is unclear whether computer navigation can improve the accuracy and reliability of targeted lower limb alignment correction following open-wedge high tibial osteotomy (HTO). This meta-analysis was designed to compare the accuracy and reliability of limb alignment correction between computer navigated and conventional open-wedge HTOs. Methods: Studies that compared postoperative coronal alignment, including mechanical axis (MA) and weight bearing line (WBL) ratio, outliers of alignment correction, and change in tibial posterior slope, following open-wedge HTO performed using computer navigated and conventional methods were included...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29050180/-meta-analysis-of-three-dimensional-printing-patient-specific-instrumentation-versus-conventional-instrumentation-in-total-knee-arthroplasty
#2
J T Ren, C Xu, J S Wang, X L Liu
Objective: To evaluate the effects of three-dimensional printing patient-specific instrumentation(PSI) versus conventional instrumentation(CI) in the total knee arthroplasty. Methods: According to "patient-specific" , "patient-matched" , "custom" , "Instrumentation" , "Guide Instrumentation" , "cutting blocks" , "total knee arthroplasty" , "total knee replacement" , "TKA" and "TKR" , the literature on PubMed, EMbase, Cochrane library, CBM and WanFang were searched. According to the inclusion and exclusion criteria, the high quality randomized control trial (RCT) studies about three-dimensional (3D) printing patient-specific instrumentation versus conventional instrumentation in the total knee arthroplasty were collected...
October 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/29037360/factors-influencing-peripheral-venous-pressure-in-an-experimental-model
#3
Seshadri Raju, William Crim, William Buck
BACKGROUND: Peripheral venous hypertension and microvascular injury have merged as central features of chronic venous disease. Peripheral venous pressure in the lower limb is controlled by central and peripheral mechanisms. In the current manuscript, we examine the role of peripheral factors, particularly conduit capacitance compliance, focal stenosis, and arterial inflow into the calf. METHODS: An experimental venous model using Penrose tubing as a venous analogue was used where the aforementioned parameters could be manipulated...
November 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/29026941/neutral-alignment-leads-to-higher-knee-society-scores-after-total-knee-arthroplasty-in-preoperatively-non-varus-patients-a-prospective-clinical-study-using-3d-ct
#4
Omer Slevin, Anna Hirschmann, Filippo F Schiapparelli, Felix Amsler, Rolf W Huegli, Michael T Hirschmann
PURPOSE: The optimal coronal alignment is still under debate. However, in most of the studies, alignment was only assessed using radiographs, which are not accurate enough for assessment of tibial and femoral TKA position. The primary purpose of this study was to assess the relationship between coronal TKA alignment using 3D-reconstructed CTs and clinical outcome in patients with preoperative varus in comparison with patients with natural or valgus deformity. It was the hypothesis that neutral limb alignment shows a better outcome after TKA...
October 12, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29023529/radiographic-measurement-of-the-quadriceps-angle-in-dogs
#5
Stefania Pinna, Noemi Romagnoli
The direction of the force of the quadriceps muscle group is expressed by the value of the quadriceps angle, between the long axis of the muscle rectus femoris and the patellar ligament. This value is often modified in dogs with patellar luxation, a common orthopaedic disease of the stifle joint in both small and large dogs. The aims of the present study were to give a reference value for the quadriceps angle in healthy small and medium-large breed dogs. The medical records of healthy dogs and their pelvic limb radiographs (2014-2016) were reviewed...
2017: PloS One
https://www.readbyqxmd.com/read/28992180/integrating-evo-and-devo-the-limb-as-model-structure
#6
Nathan M Young
Reconciling the origins of morphological diversity with the deep homology of underlying mechanisms is a question fundamental to the goals of evolutionary developmental biology ("evo-devo" or EDB). In this paper I argue that differing research agendas in evolutionary and developmental biology have hindered how we address this question, but that the limb provides ideal "common ground" for their fuller integration. To support this idea, I review two previous analyses of limb variation in mammal, bird, and reptile taxa that offer complementary approaches to explaining diversity...
September 6, 2017: Integrative and Comparative Biology
https://www.readbyqxmd.com/read/28932503/effect-of-high-tibial-osteotomy-on-hip-biomechanics-in-patients-with-genu-varum-a%C3%A2-prospective-cohort-study
#7
Mehdi Moghtadaei, Ali Yeganeh, Bahram Boddouhi, Atefe Alaee, Hossein Farahini, Babak Otoukesh
BACKGROUND AND AIMS: The aim of this study is to evaluate the effect of proximal tibia osteotomy on hip biomechanics. METHODS: This cohort study was conducted on 50 knees of 37 patients divided into two groups of unilateral and bilateral surgeries during 2015-2016. Patients underwent medial open-wedge osteotomy of proximal tibia. Axial alignment of lower limb radiography was carried out for the patients before and after the osteotomy. RESULTS: Findings from unilateral and bilateral high tibial osteotomies demonstrated that the average of greater trochanter (GT) angle from femoral head center and also the average angle of knee varus were significantly decreased (P = 0...
June 2017: Interventional Medicine & Applied Science
https://www.readbyqxmd.com/read/28913383/the-effect-of-sagittal-femoral-bowing-on-the-femoral-component-position-in-total-knee-arthroplasty
#8
Seyyed Morteza Kazemi, Tooraj Shafaghi, Reza Minaei, Reza Osanloo, Hashem Abrishamkarzadeh, Farshad Safdari
In the current study, we investigated that how sagittal femoral bowing can affect the sagittal alignment of the femoral component in total knee arthroplasty (TKA). There were 25 patients underwent TKA. Long leg radiography in lateral view was performed. The sagittal femoral bowing (SFB) and component alignment in relation to the sagittal mechanical axis and distal anterior cortical line (DACL) were measured. Finally, the correlation of component alignment and SFB was examined. Mean SFB was 7±2.7 degrees. The component was in flexion position in relation to mechanical axis and DACL as 8...
July 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/28904636/the-orthopaedic-management-of-lower-limb-deformity-in-hypophosphataemic-rickets
#9
A Horn, J Wright, D Bockenhauer, W Van't Hoff, D M Eastwood
BACKGROUND: Many patients with X-linked hypophosphataemic rickets (X-LHPR) demonstrate significant lower limb deformity despite optimal medical management. This study evaluates the use of guided growth by means of hemi-epiphysiodesis to address coronal plane deformity in the skeletally immature child. METHODS: Since 2005, 24 patients with X-LHPR have been referred to our orthopaedic unit for evaluation. All patients had standardised long leg radiographs that were analysed sequentially before and after surgery if any was performed...
August 1, 2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28891825/hemiepiphyseodesis-for-juvenile-and-adolescent-tibia-vara-utilizing-percutaneous-transphyseal-screws
#10
Robert F Murphy, Mark A Pacult, William R Barfield, James F Mooney
BACKGROUND: In juvenile and adolescent tibia vara patients with sufficient growth remaining, implant-controlled hemiepiphyseodesis, or guided growth, can be used to correct deformity. Recent reports have described hardware failure of certain hemiepiphyseodesis implants in overweight patients with tibia vara. We describe our experience using transphyseal screws to correct deformity in this patient population. METHODS: A retrospective chart and radiograph review was conducted on all juvenile and adolescent tibia vara patients who underwent lateral proximal tibial hemiepiphyseodesis using a single transphyseal screw...
September 7, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28888904/changes-in-biomechanical-risk-factors-for-knee-osteoarthritis-and-their-association-with-5-year-clinically-important-improvement-after-limb-realignment-surgery
#11
T B Birmingham, R Moyer, K Leitch, B Chesworth, D Bryant, K Willits, R Litchfield, P J Fowler, J R Giffin
OBJECTIVE: To evaluate 5-year outcomes after lower limb realignment and test the hypothesis that surgery-induced changes in selected biomechanical risk factors for medial knee osteoarthritis (OA) are associated with clinically important improvements. DESIGN: We prospectively evaluated patient-reported outcomes, full-limb standing radiographs and gait biomechanics before, 6 months (surgery-induced change) and 5 years after medial opening wedge high tibial osteotomy (HTO) in 170 patients (46...
September 6, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28874974/evaluation-of-sagittal-spine-pelvis-lower-limb-alignment-in-elderly-women-with-pelvic-retroversion-while-standing-and-walking-using-a-three-dimensional-musculoskeletal-model
#12
Ken Sasaki, Michio Hongo, Naohisa Miyakoshi, Toshiki Matsunaga, Shin Yamada, Hiroaki Kijima, Yoichi Shimada
STUDY DESIGN: In vivo biomechanical study using a three-dimensional (3D) musculoskeletal model for elderly individuals with or without pelvic retroversion. PURPOSE: To evaluate the effect of pelvic retroversion on the sagittal alignment of the spine, pelvis, and lower limb in elderly females while standing and walking. OVERVIEW OF LITERATURE: Patients with hip-spine syndrome have concurrent hip-joint and spine diseases. However, the dynamic sagittal alignment between the hip joint and spine has rarely been investigated...
August 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/28854938/the-assessment-of-femoral-shaft-morphology-in-the-sagittal-plane-in-chinese-patients-with-osteoarthritis-a-radiographic-analysis
#13
Zhengyuan Bao, Liang Qiao, Jianghui Qin, Jiacheng Xu, Sheng Zhou, Dongyang Chen, Dongquan Shi, Jin Dai, Yao Yao, Qing Jiang, Zhihong Xu
BACKGROUND: The purpose of this study was to analyze femoral shaft sagittal parameters in Chinese osteoarthritis (OA) patients undergoing total knee arthroplasty (TKA) and identify whether the parameters in the coronal plane could be predictors of those in the sagittal plane. METHODS: Standard long-standing anteroposterior and femoral lateral radiographs of 50 lower limbs in 50 Chinese OA patients were included. Sagittal femoral bowing angle (sFBA), angle between femoral distal anterior cortex axis and sagittal mechanical axis (DACSMA), angle between femoral distal anterior cortex axis and sagittal distal anatomic axis (DACSDAA), and angle between femoral sagittal mechanical axis and sagittal distal anatomic axis (SMADAA) were measured...
August 30, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28835990/cerebellar-compartments-for-the-processing-of-kinematic-and-kinetic-information-related-to-hindlimb-stepping
#14
M S Valle, G Bosco, R E Poppele
We previously showed that proprioceptive sensory input from the hindlimbs to the anterior cerebellar cortex of the cat may not be simply organized with respect to a body map, but it may also be distributed to multiple discrete functional areas extending beyond classical body map boundaries. With passive hindlimb stepping movements, cerebellar activity was shown to relate to whole limb kinematics as does the activity of dorsal spinocerebellar tract (DSCT) neurons. For DSCT activity, whole limb kinematics provides a solid functional framework within which information about limb forces, such as those generated during active stepping, may also be embedded...
November 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28834131/alterations-in-anterior-posterior-patterning-and-its-accompanying-changes-along-the-proximal-distal-axis-during-the-fin-to-limb-transition
#15
REVIEW
Mikiko Tanaka
The evolution from fins to limbs was one of the most successful innovations for vertebrates, allowing them to vastly expand their behaviors and habitats. Fossil records suggest that morphological changes occurred not only along the proximal-distal axis included appearance of the autopod, but also occurred along the anterior-posterior axis included reductions in the size and number of basal bones and digits. This review focuses on recent progress in developmental and genetic studies aimed at elucidating the mechanisms underlying alteration of anterior-posterior patterning and its accompanying changes along the proximal-distal axis during the fin-to-limb transition...
August 19, 2017: Genesis: the Journal of Genetics and Development
https://www.readbyqxmd.com/read/28827057/ilizarov-hip-reconstruction-osteotomy-a-review
#16
Masood Umer, Talal Aqueel Quadri, Rizwan Haroon Rashid
Hip joint instability can be secondary to congenital hip pathologies like developmental dysplasia (DDH) or acquired such as sequel of infective or neoplastic process. An unstable hip is usually associated with loss of bone from the proximal femur, shortening, abnormal gait, and pain. Many authors have suggested proximal femoral valgus osteotomy for the treatment of unstable hip joints. Ilizarov modified this technique and performed a double-level osteotomy. In addition to proximal femoral valgus extension osteotomy, he introduced a distal femoral varus osteotomy which would lead to limb lengthening and correction of mechanical axis of the leg...
August 18, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28813880/series-elastic-actuation-of-an-elbow-rehabilitation-exoskeleton-with-axis-misalignment-adaptation
#17
Kuan-Yi Wu, Yin-Yu Su, Ying-Lung Yu, Kuei-You Lin, Chao-Chieh Lan
Powered exoskeletons can facilitate rehabilitation of patients with upper limb disabilities. Designs using rotary motors usually result in bulky exoskeletons to reduce the problem of moving inertia. This paper presents a new linearly actuated elbow exoskeleton that consists of a slider crank mechanism and a linear motor. The linear motor is placed beside the upper arm and closer to shoulder joint. Thus better inertia properties can be achieved while lightweight and compactness are maintained. A passive joint is introduced to compensate for the exoskeleton-elbow misalignment and intersubject size variation...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28752819/computer-assisted-navigation-in-total-knee-and-hip-arthroplasty
#18
Kamal Deep, Shivakumar Shankar, Ashish Mahendra
INTRODUCTION: Computer assisted surgery was pioneered in early 1990s. The first computer assisted surgery (CAS) total knee replacement with an imageless system was carried out in 1997. In the past 25 years, CAS has progressed from experimental in vitro studies to established in vivo surgical procedures. METHODS: A comprehensive body of evidence establishing the advantages of computer assisted surgery in knee and hip arthroplasty is available. Established benefits have been demonstrated including its role as an excellent research tool...
2017: SICOT-J
https://www.readbyqxmd.com/read/28736125/minimally-invasive-treatment-of-displaced-femoral-shaft-fractures-with-a-teleoperated-robot-assisted-surgical-system
#19
Qing Zhu, Bin Liang, Xingsong Wang, Xiaogang Sun, Liming Wang
BACKGROUND: Minimally invasive surgical operation of intramedullary (IM) nailing is a standard technique for treating diaphyseal fractures. However, in addition to its advantages, there are some drawbacks such as the frequent occurrence of malalignment, physical fatigue and high radiation exposure to medical staff. The use of robotic and navigation techniques is promising treatments for femoral fractures. MATERIALS AND METHODS: This paper presents a novel robot-assisted manipulator for femoral shaft fracture reduction with indirect contact with the femur...
July 12, 2017: Injury
https://www.readbyqxmd.com/read/28721459/measurement-of-lower-limb-alignment-there-are-within-person-differences-between-weight-bearing-and-non-weight-bearing-measurement-modalities
#20
Daphne A L Schoenmakers, Peter Z Feczko, Bert Boonen, Martijn G M Schotanus, Nanne P Kort, Pieter J Emans
PURPOSE: Previous studies have compared weight-bearing mechanical leg axis (MLA) measurements to non-weight-bearing measurement modalities. Most of these studies compared mean or median values and did not analyse within-person differences between measurements. This study evaluates the within-person agreement of MLA measurements between weight-bearing full-length radiographs (FLR) and non-weight-bearing measurement modalities (computer-assisted surgery (CAS) navigation or MRI). MATERIALS AND METHODS: Two independent observers measured the MLA on pre- and postoperative weight-bearing FLR in 168 patients...
November 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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