Abstract:
BACKGROUND:The tendo Achilles (TA) is a tendon very susceptible to injury. Biomechanical methodologies for exploring tendon strain are limited, however, as they are typically performed in vitro or by indirectly measuring the displacement of reference markers. By using panoramic ultrasound, this study reports a novel approach to acquire direct, in vivo tendon extension data. MATERIALS AND METHODS:Sonographic scans were acquired between two in vivo landmarks following a consistent pathway along the long axis of the distal TA. Ten subjects were scanned with an unloaded tendon and then when resisting a range of loads. Tendon cross-sectional area was measured following coronal scans of the TA in three subjects, allowing for calculation and plotting of stress versus strain. Coefficients of variation were also calculated to measure the reliability and robustness of the protocol. RESULTS:Data from all ten subjects were found to fit with classic tendon force versus extension trend. The stress versus strain plot indicated that the wavy collagen fibers were fully straightened at 4% to 6% strain, which is comparable to results reported in other studies. The Young's modulus of 0.5 to 2.1 GPa also compared favorably to published data. CONCLUSION:Coefficients of variation indicated that the protocol was repeatable, although the technique for measuring cross-sectional area could be improved. CLINICAL RELEVANCE:As the reported data is comparable to previous invasive and in vitro studies, we believe sports medicine specialists and orthopaedic surgeons can utilize panoramic ultrasound to directly measure in vivo tendon strain.
journal_name
Foot Ankle Intjournal_title
Foot & ankle internationalauthors
Stokes OM,Theobald PS,Pugh ND,Nokes LDdoi
10.3113/FAI.2010.0905subject
Has Abstractpub_date
2010-10-01 00:00:00pages
905-9issue
10eissn
1071-1007issn
1944-7876pii
5004314journal_volume
31pub_type
杂志文章abstract::The purpose of this study was to compare the compression effect of the 7.0-AO screw and the 6.5 mm Ideal Compression Screw (I.CO.S.) screw in an in vitro subtalar arthodesis model. Six fresh-frozen, human cadaver foot specimens were obtained for analysis. The subtalar joint was opened laterally without affecting the a...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070202301102
更新日期:2002-11-01 00:00:00
abstract::The subtalar, talonavicular, and calcaneocuboid joints were internally fixed to simulate triple arthrodesis was performed on eight matched pairs of human cadaver feet. Feet were randomly assigned such that one specimen in each pair was internally fixed with cobalt-chrome staples and one specimen with stainless steel s...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110079601701209
更新日期:1996-12-01 00:00:00
abstract:BACKGROUND:Treatment options for plantar fasciitis have resulted in varied patient outcomes. The aim of this study was to compare a novel treatment, cryopreserved human amniotic membrane (c-hAM), to a traditional treatment, corticosteroid. Our hypothesis was that c-hAM would be safe and comparable to corticosteroids fo...
journal_title:Foot & ankle international
pub_type: 杂志文章,随机对照试验
doi:10.1177/1071100714552824
更新日期:2015-02-01 00:00:00
abstract:BACKGROUND:Static footprints have been widely used clinically. However, since this measure provides only indirect information about the medial longitudinal arch height, it is not clear if it can be indicative of dynamic foot function especially in obese children. This study aimed to verify whether static footprints can...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.3113/FAI.2008.1141
更新日期:2008-11-01 00:00:00
abstract::Unlike the Achilles tendon, the posterior tibial tendon does not typically undergo acute rupture. We report two cases of posterior tibial tendon tears occurring in young, athletic individuals (<30 years old) that required operative intervention before the patients could return to competitive sports. We believe that th...
journal_title:Foot & ankle international
pub_type: 杂志文章,评审
doi:10.1177/107110079801900911
更新日期:1998-09-01 00:00:00
abstract:BACKGROUND::Lesser toe proximal interphalangeal (PIP) joint arthrodesis is one of the most common foot and ankle elective procedures often using K-wires for fixation. K-wire associated complications led to development of intramedullary fixation devices. We hypothesized that X Fuse (Stryker) and Smart Toe (Stryker) woul...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100718805066
更新日期:2019-02-01 00:00:00
abstract::The free vascularized fibula graft has been an increasingly useful tool in orthopaedic surgery. In addition to its many applications, the reported low donor site morbidity has helped make this a popular treatment modality. Isolated flexor hallucis longus flexion contracture has been reported in the literature; however...
journal_title:Foot & ankle international
pub_type: 杂志文章,评审
doi:10.1177/107110079501601004
更新日期:1995-10-01 00:00:00
abstract:BACKGROUND:Specialized treatment of plantar fasciitis that can reduce inflammation and promote healing may be a possible alternative prior to surgical intervention. We report the results of a randomized clinical trial examining the efficacy of micronized dehydrated human amniotic/chorionic membrane (mDHACM) injection a...
journal_title:Foot & ankle international
pub_type: 杂志文章,随机对照试验
doi:10.1177/1071100713502179
更新日期:2013-10-01 00:00:00
abstract::An intramedullary fixation device was devised by the senior author (K.A.J.) to use in conjunction with a previously described method for tibiotalocalcaneal arthrodesis. Satisfactory results were obtained in approximately 87% of the initial 30 patients; union was radiographically or clinically evident in all but two pa...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110079401501208
更新日期:1994-12-01 00:00:00
abstract:BACKGROUND:The evidence supporting best practice guidelines in the field of cartilage repair of the ankle is based on both low quality and low levels of evidence. Therefore, an international consensus group of experts was convened to collaboratively advance toward consensus opinions based on the best available evidence...
journal_title:Foot & ankle international
pub_type: 共识发展会议,杂志文章,实务指引
doi:10.1177/1071100718781096
更新日期:2018-07-01 00:00:00
abstract::Fifth metatarsal fractures, otherwise known as "Jones" fractures, occur commonly in athletes and nonathletes alike. While recent occurrence in the popular elite athlete has increased public knowledge and interest in the fracture, this injury is common at all levels of sport. This review will focus on all three types o...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100717741856
更新日期:2018-02-01 00:00:00
abstract::Percutaneous axial extensometers were mounted on the medial cortex of the midtibial diaphysis in seven male volunteers and the effect of three different shoes on in vivo peak-to-peak axial compression-tension strains measured during dynamic loading. Zohar shoes had lower axial strains and strain rates during treadmill...
journal_title:Foot & ankle international
pub_type: 临床试验,杂志文章
doi:10.1177/107110079801900206
更新日期:1998-02-01 00:00:00
abstract::Sixty-three patients (118 toes) were evaluated at an average 61 month follow-up following PIP resection arthroplasty for a fixed hammertoe deformity. The deformity involved the second toe in 35%, the third toe in 21%, the fourth toe in 24%, and the fifth toe in 20%. The involved toe averaged 2 mm. greater length than ...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070002100202
更新日期:2000-02-01 00:00:00
abstract:BACKGROUND:Residual supination of the midfoot during reconstruction of the stage II adult-acquired flatfoot deformity (AAFD) is often addressed with a medial cuneiform (Cotton) osteotomy after adequate correction of the hindfoot valgus deformity. The purpose of this study was to determine if there was a correlation bet...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100718822839
更新日期:2019-05-01 00:00:00
abstract:BACKGROUND:The fibula is commonly used for bone grafts. Previous clinical and biomechanical studies have suggested that the length of the residual portion of the distal part of the fibula has an important effect on the long-term stability of the ankle joint. However, we cannot find clear-cut guidelines for the amount o...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070602700306
更新日期:2006-03-01 00:00:00
abstract::All patients with cerebral palsy who had hallux valgus and bunion deformities surgically corrected between 1986 and 1995 were reviewed to determine whether techniques other than arthrodesis of the first metatarsophalangeal joint would adequately correct these deformities. Twenty-six feet of 17 patients were surgically...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110079801901207
更新日期:1998-12-01 00:00:00
abstract:BACKGROUND:Transfer of the flexor hallucis longus (FHL) tendon is an established method to replace a dysfunctional Achilles tendon. When using a single incision, the FHL tendon has to be transferred as a single stranded graft into the calcaneus and the distal FHL stump cannot be directly attached to the flexor digitoru...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.3113/FAI.2012.0007
更新日期:2012-01-01 00:00:00
abstract::Forty-three patients (47 heels) underwent decompression of the nerve to abductor digiti minimi with partial plantar fascia release for intractable plantar fasciitis over a 4-year period. Forty-one patients (45 heels) were available for follow-up. All of the patients had failed to respond to nonoperative treatment. The...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110079902001209
更新日期:1999-12-01 00:00:00
abstract:BACKGROUND:Staged care with interval external fixation is a successful established treatment strategy for high energy periarticular fractures with often extensive soft tissue damage such as the tibial plateau and plafond. The aim of the current study was to determine whether staged care of high energy midfoot fracture/...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100714552077
更新日期:2014-12-01 00:00:00
abstract:BACKGROUND:Different options exist for the operative treatment of forefoot problems and deformities in rheumatoid arthritis (RA). The current study compared first ray and resection arthroplasty with respect to patient satisfaction, clinical and functional outcome. MATERIALS AND METHODS:In a retrospective study 53 RA p...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.3113/FAI.2011.0589
更新日期:2011-06-01 00:00:00
abstract::Foot and ankle operations are being performed with greater frequency as outpatient procedures. Although the surgical procedure remains the same whether the operation is done in an inpatient or an outpatient setting, the anesthesia and postoperative analgesia are greatly affected when patients must be discharged soon a...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070002100107
更新日期:2000-01-01 00:00:00
abstract:BACKGROUND:There is limited consensus on the optimal operative technique for correcting heel varus in patients with Charcot-Marie-Tooth (CMT) disease. This comparative study evaluated the ability of 4 lateralizing calcaneal osteotomies, with and without Dwyer wedge resection and coronal rotation of the posterior tubero...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100718781572
更新日期:2018-10-01 00:00:00
abstract:BACKGROUND:Following Achilles tendon rupture, tendon elongation leads to long term deficits in calf function. A surrogate measure of Achilles tendon length, Achilles tendon resting angle (ATRA), has been described but has not been validated against length measured using ultrasound. Therefore, the purpose of this study ...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100717742372
更新日期:2018-03-01 00:00:00
abstract:BACKGROUND:Metatarsalgia is frequently associated with hallux valgus. The aim of this study was to evaluate how the relative length and position of the first metatarsal head influenced metatarsalgia and plantar callosities beneath the lesser metatarsal heads. METHODS:A retrospective analysis of the clinical data and r...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100716634792
更新日期:2016-06-01 00:00:00
abstract:BACKGROUND:Interfragmentary lag screws, protected by a plate, have been applied for many years in the treatment of supination-external rotation (SER) ankle fractures. Recently, similar biomechanical stability was found between fixation completed with a plate and lag screw and a plate alone. The aim of this study was to...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100720917645
更新日期:2020-07-01 00:00:00
abstract:BACKGROUND:Studies using footprint-based estimates of arch height have indicated that obesity results in a lowered medial longitudinal arch in children. However, the potentially confounding effect of body composition on indirect measures of arch height, such as the arch index, has not been investigated. METHODS:This s...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070402500811
更新日期:2004-08-01 00:00:00
abstract:BACKGROUND:The purpose of this study was to perform a histological comparative analysis of tibiotalar joint samples taken from areas of osteolysis adjacent to total ankle arthroplasties vs control synovial specimens to determine the reaction to and presence of polyethylene (PE) particles. METHODS:A total of 57 patholo...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100716682333
更新日期:2017-04-01 00:00:00
abstract:BACKGROUND:The deep deltoid ligament (DDL) is a key stabilizer to the medial ankle and ankle mortise and can be disrupted in ligamentous supination external rotation type IV (LSER4) ankle fractures. The purpose of this study was to define the medial clear space (MCS) measurement on injury mortise radiographs that corre...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100720962796
更新日期:2020-10-26 00:00:00
abstract:BACKGROUND:Metatarsus adductus (MA) increases the risk of developing symptomatic hallux valgus (HV). This study aimed to determine the prevalence of MA in patients with symptomatic HV and to evaluate how it affected the functional outcome after scarf osteotomy. METHODS:Between January 2007 and June 2012, a total of 20...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100715595618
更新日期:2015-11-01 00:00:00
abstract:BACKGROUND:Recently, it has been shown that avascular necrosis of the talus can occur in only a portion of the talar body. There is little information regarding the geographic location of the avascular segment and the clinical significance of an incomplete avascular process. METHODS:Seven patients with partial avascul...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.3113/FAI.2010.0777
更新日期:2010-09-01 00:00:00