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Charlie A Hickslittle - One of the best experts on this subject based on the ideXlab platform.
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Ankle ligament healing after an acute Ankle sprain an evidence based approach
Journal of Athletic Training, 2008Co-Authors: Tricia J Hubbard, Charlie A HickslittleAbstract:Abstract Objective: To perform a systematic review to determine the healing time of the lateral Ankle ligaments after an acute Ankle sprain. Data Sources: We identified English-language research studies from 1964 to 2007 by searching MEDLINE, Physiotherapy Evidence Database (PEDro), SportDiscus, and CINAHL using the terms Ankle sprain, Ankle rehabilitation, Ankle Injury, ligament healing, and immobilization. Study Selection: We selected studies that described randomized, controlled clinical trials measuring ligament laxity either objectively or subjectively immediately after Injury and at least 1 more time after Injury. Data Extraction: Two reviewers independently scored the 7 studies that met the inclusion criteria. Because of differences in study designs, a meta-analysis could not be performed. Effect sizes and confidence intervals could be calculated only for 1 study. The percentages of subjective and objective instability were calculated for the remaining studies. Data Synthesis: Ankle laxity improved...
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Ankle ligament healing after an acute Ankle sprain an evidence based approach
Journal of Athletic Training, 2008Co-Authors: Tricia J Hubbard, Charlie A HickslittleAbstract:Abstract Objective: To perform a systematic review to determine the healing time of the lateral Ankle ligaments after an acute Ankle sprain. Data Sources: We identified English-language research studies from 1964 to 2007 by searching MEDLINE, Physiotherapy Evidence Database (PEDro), SportDiscus, and CINAHL using the terms Ankle sprain, Ankle rehabilitation, Ankle Injury, ligament healing, and immobilization. Study Selection: We selected studies that described randomized, controlled clinical trials measuring ligament laxity either objectively or subjectively immediately after Injury and at least 1 more time after Injury. Data Extraction: Two reviewers independently scored the 7 studies that met the inclusion criteria. Because of differences in study designs, a meta-analysis could not be performed. Effect sizes and confidence intervals could be calculated only for 1 study. The percentages of subjective and objective instability were calculated for the remaining studies. Data Synthesis: Ankle laxity improved...
Roger C Haut - One of the best experts on this subject based on the ideXlab platform.
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Development and Validation of a Computational Model to Study the Effect of Foot Constraint on Ankle Injury due to External Rotation
Annals of Biomedical Engineering, 2011Co-Authors: Feng Wei, Stanley C. Hunley, John W. Powell, Roger C HautAbstract:Recent studies, using two different manners of foot constraint, potted and taped, document altered failure characteristics in the human cadaver Ankle under controlled external rotation of the foot. The posterior talofibular ligament (PTaFL) was commonly injured when the foot was constrained in potting material, while the frequency of deltoid ligament Injury was higher for the taped foot. In this study an existing multibody computational modeling approach was validated to include the influence of foot constraint, determine the kinematics of the joint under external foot rotation, and consequently obtain strains in various ligaments. It was hypothesized that the location of Ankle Injury due to excessive levels of external foot rotation is a function of foot constraint. The results from this model simulation supported this hypothesis and helped to explain the mechanisms of Injury in the cadaver experiments. An excessive external foot rotation might generate a PTaFL Injury for a rigid foot constraint, and an anterior deltoid ligament Injury for a pliant foot constraint. The computational models may be further developed and modified to simulate the human response for different shoe designs, as well as on various athletic shoe–surface interfaces, so as to provide a computational basis for optimizing athletic performance with minimal Injury risk.
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a biomechanical investigation of Ankle Injury under excessive external foot rotation in the human cadaver
Journal of Biomechanical Engineering-transactions of The Asme, 2010Co-Authors: Feng Wei, John W. Powell, Mark R Villwock, Eric G Meyer, Roger C HautAbstract:Numerous studies on the mechanisms of Ankle Injury deal with injuries to the syndesmosis and anterior ligamentous structures but a previous sectioning study also describes the important role of the posterior talofibular ligament (PTaFL) in the Ankle's resistance to external rotation of the foot. It was hypothesized that failure level external rotation of the foot would lead to Injury of the PTaFL. Ten Ankles were tested by externally rotating the foot until gross Injury. Two different frequencies of rotation were used in this study, 0.5 Hz and 2 Hz. The mean failure torque of the Ankles was 69.5+/-11.7 Nm with a mean failure angle of 40.7+/-7.3 degrees . No effects of rotation frequency or flexion angle were noted. The most commonly injured structure was the PTaFL. Visible damage to the syndesmosis only occurred in combination with fibular fracture in these experiments. The constraint of the subtalar joint in the current study may have affected the mechanics of the foot and led to the resultant strain in the PTaFL. In the real world, talus rotations may be affected by athletic footwear that may influence the location and potential for an Ankle Injury under external rotation of the foot.
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Ankle Injuries During Excessive External Foot Rotation May Depend on Foot Constraint: Development of a Computational Model
ASME 2010 Summer Bioengineering Conference Parts A and B, 2010Co-Authors: John W. Powell, Roger C HautAbstract:Numerous studies on the mechanisms of Ankle Injury deal with injuries to the syndesmosis and anterior ligamentous structures, but previous sectioning and clinical studies also describe the important role of the posterior talofibular ligament (PTaFL) in the Ankle’s resistance to external rotation of the foot. Foot constraint may influence subtalar motion and the movement of the bones in the foot, thereby influencing the mode of Injury during external rotation [1]. Stiehl et al. [2] constrain the foot with fiberglass cast tape, externally rotate the foot 90°, and produce Injury to the deltoid ligament and anterior tibiofibular ligament (ATiFL) with bone fracture. In contrast, Stormont et al. [3] fix the foot in a potting alloy and conclude the primary ligamentous restraints to external rotation are the PTaFL and calcaneofibular ligament (CaFL).Copyright © 2010 by ASME
Bruce D Beynnon - One of the best experts on this subject based on the ideXlab platform.
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Ankle ligament Injury risk factors a prospective study of college athletes
Journal of Orthopaedic Research, 2001Co-Authors: Bruce D Beynnon, Judith F Baumhauer, Denise M Alosa, Per Renstrom, Pamela M VacekAbstract:Over two million individuals suffer Ankle ligament trauma each year in the United States, more than half of these injuries are severe ligament sprains; however, very little is known about the factors that predispose individuals to these injuries. The purpose of this study was to determine the risk factors associated with Ankle Injury. We performed a prospective study of 118 Division I collegiate athletes who participated in soccer, lacrosse, or field hockey. Prior to the start of the athletic season, potential Ankle Injury risk factors were measured, subjects were monitored during the athletic season, and injuries documented. The number of Ankle injuries per 1000 person-days of exposure to sports was 1.6 for the men and 2.2 for the women. There were 13 injuries among the 68 women (19%) and seven injuries among the 50 men (13%), but these proportions were not significantly different. Women who played soccer had a higher incidence of Ankle Injury than those who played field hockey or lacrosse. Among men, there was no relationship between type of sport and incidence of Injury. Factors associated with Ankle ligament Injury differ for men relative to women. Women with increased tibial varum and calcaneal eversion range of motion are at greater risk of suffering Ankle ligament trauma, while men with increased talar tilt are at greater risk. Generalized joint laxity, strength, postural stability, and muscle reaction time were unrelated to Injury.
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a prospective study of Ankle Injury risk factors
American Journal of Sports Medicine, 1995Co-Authors: Judith F Baumhauer, Denise M Alosa, A F Renstrom, Saul G Trevino, Bruce D BeynnonAbstract:Many factors are thought to cause Ankle ligament injuries. The purpose of this study was to examine Injury risk factors prospectively and determine if an abnormality in any one or a combination of factors identifies an individual, or an Ankle, at risk for subsequent inversion Ankle Injury. We examined 145 college-aged athletes before the athletic season and measured generalized joint laxity, anatomic foot and Ankle alignment, Ankle ligament stability, and isokinetic strength. These athletes were monitored throughout the season. Fifteen athletes incurred inversion Ankle injuries. Statistical analyses were performed using both within-group (uninjured versus injured groups) data and within-subject (injured versus uninjured Ankles) data. No significant differences were found between the injured (N = 15) and uninjured (N = 130) groups in any of the parameters measured. However, the eversion-to-inversion strength ratio was significantly greater for the injured group compared with the uninjured group. Analysis of the within-subject data demonstrated that plantar flexion strength and the ratio of dorsiflexion to plantar flexion strength was significantly different for the injured Ankle compared with the contralateral uninjured Ankle. Individuals with a muscle strength imbalance as measured by an elevated eversion-to-inversion ratio exhibited a higher incidence of inversion Ankle sprains. Ankles with greater plantar flexion strength and a smaller dorsiflexion-to-plantar flexion ratio also had a higher incidence of inversion Ankle sprains.
Tricia J Hubbard - One of the best experts on this subject based on the ideXlab platform.
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Ankle ligament healing after an acute Ankle sprain an evidence based approach
Journal of Athletic Training, 2008Co-Authors: Tricia J Hubbard, Charlie A HickslittleAbstract:Abstract Objective: To perform a systematic review to determine the healing time of the lateral Ankle ligaments after an acute Ankle sprain. Data Sources: We identified English-language research studies from 1964 to 2007 by searching MEDLINE, Physiotherapy Evidence Database (PEDro), SportDiscus, and CINAHL using the terms Ankle sprain, Ankle rehabilitation, Ankle Injury, ligament healing, and immobilization. Study Selection: We selected studies that described randomized, controlled clinical trials measuring ligament laxity either objectively or subjectively immediately after Injury and at least 1 more time after Injury. Data Extraction: Two reviewers independently scored the 7 studies that met the inclusion criteria. Because of differences in study designs, a meta-analysis could not be performed. Effect sizes and confidence intervals could be calculated only for 1 study. The percentages of subjective and objective instability were calculated for the remaining studies. Data Synthesis: Ankle laxity improved...
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Ankle ligament healing after an acute Ankle sprain an evidence based approach
Journal of Athletic Training, 2008Co-Authors: Tricia J Hubbard, Charlie A HickslittleAbstract:Abstract Objective: To perform a systematic review to determine the healing time of the lateral Ankle ligaments after an acute Ankle sprain. Data Sources: We identified English-language research studies from 1964 to 2007 by searching MEDLINE, Physiotherapy Evidence Database (PEDro), SportDiscus, and CINAHL using the terms Ankle sprain, Ankle rehabilitation, Ankle Injury, ligament healing, and immobilization. Study Selection: We selected studies that described randomized, controlled clinical trials measuring ligament laxity either objectively or subjectively immediately after Injury and at least 1 more time after Injury. Data Extraction: Two reviewers independently scored the 7 studies that met the inclusion criteria. Because of differences in study designs, a meta-analysis could not be performed. Effect sizes and confidence intervals could be calculated only for 1 study. The percentages of subjective and objective instability were calculated for the remaining studies. Data Synthesis: Ankle laxity improved...
Judith F Baumhauer - One of the best experts on this subject based on the ideXlab platform.
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acute Ankle Injury and chronic lateral instability in the athlete
Clinics in Sports Medicine, 2004Co-Authors: Benedict F Digiovanni, George Partal, Judith F BaumhauerAbstract:Ankle injuries occur frequently in sports. The lateral ligamentous complex, specifically the anterior talofibular and calcaneofibular ligaments, are most commonly injured. In acute lateral ligament injuries, a functional Ankle rehabilitation program is the mainstay of treatment. Chronic Ankle instability develops in a minority of patients. Surgical procedures are broadly classified into anatomic ligament repairs versus reconstructive tenodeses. Commonly performed techniques include the Brostrom-Gould procedure,the modified Brostrum-Evans procedure, and the Chrisman-Snook procedure.
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Ankle ligament Injury risk factors a prospective study of college athletes
Journal of Orthopaedic Research, 2001Co-Authors: Bruce D Beynnon, Judith F Baumhauer, Denise M Alosa, Per Renstrom, Pamela M VacekAbstract:Over two million individuals suffer Ankle ligament trauma each year in the United States, more than half of these injuries are severe ligament sprains; however, very little is known about the factors that predispose individuals to these injuries. The purpose of this study was to determine the risk factors associated with Ankle Injury. We performed a prospective study of 118 Division I collegiate athletes who participated in soccer, lacrosse, or field hockey. Prior to the start of the athletic season, potential Ankle Injury risk factors were measured, subjects were monitored during the athletic season, and injuries documented. The number of Ankle injuries per 1000 person-days of exposure to sports was 1.6 for the men and 2.2 for the women. There were 13 injuries among the 68 women (19%) and seven injuries among the 50 men (13%), but these proportions were not significantly different. Women who played soccer had a higher incidence of Ankle Injury than those who played field hockey or lacrosse. Among men, there was no relationship between type of sport and incidence of Injury. Factors associated with Ankle ligament Injury differ for men relative to women. Women with increased tibial varum and calcaneal eversion range of motion are at greater risk of suffering Ankle ligament trauma, while men with increased talar tilt are at greater risk. Generalized joint laxity, strength, postural stability, and muscle reaction time were unrelated to Injury.
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a prospective study of Ankle Injury risk factors
American Journal of Sports Medicine, 1995Co-Authors: Judith F Baumhauer, Denise M Alosa, A F Renstrom, Saul G Trevino, Bruce D BeynnonAbstract:Many factors are thought to cause Ankle ligament injuries. The purpose of this study was to examine Injury risk factors prospectively and determine if an abnormality in any one or a combination of factors identifies an individual, or an Ankle, at risk for subsequent inversion Ankle Injury. We examined 145 college-aged athletes before the athletic season and measured generalized joint laxity, anatomic foot and Ankle alignment, Ankle ligament stability, and isokinetic strength. These athletes were monitored throughout the season. Fifteen athletes incurred inversion Ankle injuries. Statistical analyses were performed using both within-group (uninjured versus injured groups) data and within-subject (injured versus uninjured Ankles) data. No significant differences were found between the injured (N = 15) and uninjured (N = 130) groups in any of the parameters measured. However, the eversion-to-inversion strength ratio was significantly greater for the injured group compared with the uninjured group. Analysis of the within-subject data demonstrated that plantar flexion strength and the ratio of dorsiflexion to plantar flexion strength was significantly different for the injured Ankle compared with the contralateral uninjured Ankle. Individuals with a muscle strength imbalance as measured by an elevated eversion-to-inversion ratio exhibited a higher incidence of inversion Ankle sprains. Ankles with greater plantar flexion strength and a smaller dorsiflexion-to-plantar flexion ratio also had a higher incidence of inversion Ankle sprains.