Arthrodesis of the first metatarsophalangeal joint. Current recommendations

1994 ◽  
Vol 84 (6) ◽  
pp. 266-280 ◽  
Author(s):  
GV Yu ◽  
JE Shook
Keyword(s):  
Metatarsophalangeal Joint ◽  
Effective Procedure ◽  
First Metatarsophalangeal Joint ◽  
Advantages And Disadvantages ◽  
The Past ◽  
Fixation Techniques ◽  
The Individual ◽  
Specific Fixation ◽  
Individual Fixation ◽  
Multiple Conditions

Fusion of the first metatarsophalangeal joint is a time-honored, effective procedure for multiple conditions. Numerous fixation techniques have been described over the years. The authors provide an extensive overview of specific fixation techniques used throughout the past 6 years. Emphasis is placed on the potential advantages and disadvantages of the individual fixation techniques.

Gait style as an etiology to chronic postural pain. Part II. Postural compensatory process

1993 ◽  
Vol 83 (11) ◽  
pp. 615-624 ◽  
Author(s):  
HJ Dananberg
Keyword(s):  
Kinetic Energy ◽  
Sagittal Plane ◽  
Center Of Mass ◽  
Metatarsophalangeal Joint ◽  
Specific Pattern ◽  
The Body ◽  
First Metatarsophalangeal Joint ◽  
The Past ◽  
Compensatory Process ◽  
Methods Of Treatment

The body is designed to pull the center of mass over a single pivotal site formed by dorsiflexion of the first metatarsophalangeal joint. If this response dorsiflexion motion is blocked by functional hallux limitus, then the kinetic energy, which is created for this motion, must somehow be dissipated. The process by which this dissipation occurs creates a specific pattern of compensations which, in the past, has been seen as primary motions unrelated to sagittal plane blockade. These compensatory motions are described along with a brief section concerning the methods of treatment.

Heliostat Canting and Focusing Methods: An Overview and Comparison

2010 ◽  
Author(s):  
Julius Yellowhair ◽  
Clifford K. Ho
Keyword(s):  
Laser Beam ◽  
Test Facility ◽  
The Sun ◽  
Alignment Method ◽  
Advantages And Disadvantages ◽  
The Past ◽  
Thermal Test ◽  
Central Receiver ◽  
Look Back ◽  
The Individual

A central receiver power tower system consists of a field of heliostats that focus the sunlight onto the receiver on the tower. Heliostats typically consist of an array of mirror facets that track the sun throughout the day. To obtain the optimal concentrated solar flux on the receiver, the individual heliostat facets must be properly canted and focused. Several different methods have been used in the past for facet canting and focusing. These demonstrated methods and some new alignment concepts are under consideration for development and alignment of the 218 heliostats at the Sandia National Laboratories National Solar Thermal Test Facility in Albuquerque, NM. In this paper, we provide an overview and comparison of the different methods. The methods we consider are the gauge blocks, inclinometers, photogrammetry, fringe reflection, imaging with theoretical image overlays, laser beam projections, camera look-back, and target reflection methods. The advantages and disadvantages of each alignment method are identified based on several prescribed criteria for aligning the heliostats. Recommendations regarding the alignment method’s potential for efficiently and accurately aligning heliostat fields are provided.

scholarly journals Membranes, Chromatography and Membrane Chromatography. Separation Technologies for the Biopharm and Nutraceutical Era

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Aniket V. Kale ◽  
Munir Cheryan
Keyword(s):  
Pore Diffusion ◽  
Membrane Technology ◽  
Advantages And Disadvantages ◽  
The Past ◽  
Membrane Chromatography ◽  
The Individual

Membrane technology and process chromatography are widely used in the food, biopharmaceutical, nutraceutical and bioprocessing industries. Both techniques developed simultaneously and in parallel over the past few decades. The two technologies are complementary for the most part in terms of their advantages and disadvantages. Membrane chromatography integrates membranes and chromatography into one versatile technology. The resulting synergy has advantages and largely eliminates the disadvantages of the individual techniques, the most important being pore diffusion, thus leading to higher throughputs. This review compares the principles and applications of membranes, chromatography and membrane chromatography and their individual and combined roles in bioseparations.

Capsular Interposition for the Keller Bunionectomy with the Use of Soft-Tissue Anchors

2005 ◽  
Vol 95 (2) ◽  
pp. 180-182 ◽  
Author(s):  
Keith D. Cook
Keyword(s):  
Soft Tissue ◽  
Metatarsophalangeal Joint ◽  
Joint Space ◽  
Joint Capsule ◽  
Past Century ◽  
First Metatarsophalangeal Joint ◽  
The Past ◽  
Joint Pathology ◽  
Capsular Flap

The Keller procedure has been used during the past century for the treatment of first metatarsophalangeal joint pathology. Many modifications to the procedure have been made, including interposition of the joint capsule into the first metatarsophalangeal joint space. Capsular interposition is often the most difficult step in performing the Keller bunionectomy. This article describes a new, simplified technique for capsular interposition with the use of a dorsal capsular flap and soft-tissue anchors. (J Am Podiatr Med Assoc 95(2): 180–182, 2005)

scholarly journals Epidemiological profile of sesamoid disorders of the first metatarsophalangeal joint

2018 ◽  
Vol 12 (2) ◽  
pp. 102-105
Author(s):  
Marcelo Rassweiler Hardt ◽  
Samuel Machado ◽  
Andre Bergamaschi Demore ◽  
Antônio Kim ◽  
Leandro Marcantonio Camargo ◽  
...  
Keyword(s):  
Physical Activity ◽  
Public Health System ◽  
Metatarsophalangeal Joint ◽  
Foot And Ankle ◽  
Level Of Evidence ◽  
First Metatarsophalangeal Joint ◽  
The Past ◽  
Epidemiological Profile ◽  
The Right ◽  
Epidemiological Characteristics

Objective: The objective of this study is to describe the epidemiological characteristics of patients with sesamoid disorders in a sample of patients treated in the Brazilian public health system. Methods: A retrospective study was performed by reviewing the electronic charts of foot and ankle outpatient consultations over the past 5 years, analysing variables such as sex, age, occupation, ethnicity, participation in sports, laterality, and affected sesamoid (medial or lateral). Results: Abnormalities in hallucal sesamoids occur more frequently in women (63/108), during the third decade of life (56/108), and in the medial sesamoid (74/108); 65.7% of the sample with these abnormalities participated in physical activity regularly. No significant relationship was observed with laterality or occupation. Conclusion: The most commonly affected patients were females, with a mean age of 23.7 years, who participated in physical activity frequently; the right side and medial sesamoid bone were the most commonly affected sites. Level of Evidence II; Prospective Study.

Arthrodesis of the First Metatarsophalangeal Joint: A Biomechanical Study of Internal Fixation Techniques

Foot & Ankle ◽  
1993 ◽  
Vol 14 (7) ◽  
pp. 395-399 ◽  
Author(s):  
Mark J. Curtis ◽  
Mark Myerson ◽  
Riyaz H. Jinnah ◽  
Quentin G.N. Cox ◽  
Ian Alexander
Keyword(s):  
Internal Fixation ◽  
Testing Machine ◽  
Biomechanical Testing ◽  
Metatarsophalangeal Joint ◽  
Biomechanical Study ◽  
Materials Testing ◽  
Dorsal Plate ◽  
First Metatarsophalangeal Joint ◽  
Joint Surfaces ◽  
Fixation Techniques

This study compares the strength and rigidity of four methods of internal fixation for arthrodesis of the first metatarsophalangeal joint. Ten matched pairs of cadaveric first rays were harvested and arthrodesis performed by one of four techniques: (1) planar excision of joint surfaces and fixation with crossed Kirschner wires, (2) planar excision of joint surfaces and internal fixation with a dorsal plate and screws, (3) planar excision of joint surfaces and internal fixation with an interfragmentary screw, or (4) excision of the joint surfaces using powered conical reamers and fixation with an interfragmentary lag screw. Biomechanical testing with a Bionix 858 materials testing machine was carried out, applying a plantar force utilizing principles of cantilever loading. Force applied and displacement of the arthrodesis were recorded. Of the four methods tested, bony preparation with power conical reamers and supplementary interfragmentary screw fixation was the most stable.

A Biomechanical Study Using Cadaveric Toes to Test the Stability of Fixation Techniques Employed in Arthrodesis of the First Metatarsophalangeal Joint

Foot & Ankle ◽  
1986 ◽  
Vol 7 (1) ◽  
pp. 18-25 ◽  
Author(s):  
Alan Sykes ◽  
Angus W. Hughes
Keyword(s):  
Relative Effectiveness ◽  
Proximal Phalanx ◽  
Metatarsophalangeal Joint ◽  
Metatarsal Head ◽  
Biomechanical Study ◽  
Cancellous Screw ◽  
First Metatarsophalangeal Joint ◽  
Fixation Devices ◽  
Fixation Techniques ◽  
The Stability

Arthrodesis of the first metatarsophalangeal joint of 15 pairs of cadaveric big toes were performed. The arthrodesis site was shaped with either a dome and socket or planar surface contact between the metatarsal head and proximal phalanx. A template was used to standardize the position of arthrodesis in 20° of valgus and 20° dorsiflexion. Various fixation devices were used to hold this position in corresponding pairs of specimens, and these fixation devices were tested to determine their relative effectiveness to prevent displacement on loading. Force-deflection curves were obtained for the various techniques tested, and by comparing these curves, the stability of the metatarsophalangeal arthrodesis site was found to be maintained most effectively using the cancellous screw fixation device with planar metatarsophalangeal surfaces.

Multidisciplinary management of vascular access for haemodialysis: from the preparation of the initial access to the treatment of stenosis and thrombosis

VASA ◽  
2011 ◽  
Vol 40 (3) ◽  
pp. 188-198 ◽  
Author(s):  
Reinhold ◽  
Haage ◽  
Hollenbeck ◽  
Mickley ◽  
Ranft
Keyword(s):  
Vascular Access ◽  
Central Venous ◽  
Advantages And Disadvantages ◽  
Multidisciplinary Study ◽  
First Results ◽  
Lower Complication ◽  
Lower Complication Rate ◽  
Access Problems ◽  
Arteriovenous Grafts ◽  
The Individual

In February 2008 a multidisciplinary study group was established in Germany to improve the treatment of patients with potential vascular access problems. As one of the first results of their work interdisciplinary recommendations for the management of vascular access were provided, from the creation of the initial access to the treatment of complications. As a rule the wrist arteriovenous fistula (AVF) is the access of choice due to its lower complication rate when compared to other types of access. The AVF should be created 3 months prior to the expected start of haemodialysis to allow for sufficient maturation. Second and third choice accesses are arteriovenous grafts (AVG) and central venous catheters (CVC). Ultrasound is a reliable tool for vessel selection before access creation, and also for the diagnosis of complications in AVF and grafts. Access stenosis and thrombosis can be treated surgically and interventionally. The comparison of both methods reveals advantages and disadvantages for each. The therapeutic decision should be based on the individual patients’ constitution, and also on the availability and experience of the involved specialists.

ADMINISTRATION MODELS IN THE SYSTEM OF FORENSIC EXAMINATION INSTITUTIONS FROM THE POSITION OF SCIENTIFIC MANAGEMENT

2016 ◽  
Vol 16 ◽  
pp. 179-184
Author(s):  
S. V. Kudryashova
Keyword(s):  
Scientific Management ◽  
Competing Values ◽  
State Institutions ◽  
Advantages And Disadvantages ◽  
Forensic Examination ◽  
Forensic Institutions ◽  
The Individual

The individual forensic activity in comparison with the activity of forensic experts of specialized state institutions is considered, the main advantages and disadvantages are determined. The directions of development of specialized state and non-state forensic institutions are presented in accordance with R. Quinn's competing values model.

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