Abstract:
:The understanding of load transfer characteristics is the baseline for biomechanics of the ankle joint. Changes in contact patterns of the articular cartilage from the norm may indicate pathologic conditions. Measurement of the contact in human cadaver ankles provides a direct measurement for this understanding. The force transfer characteristics of the three facets of the ankle joint were investigated. Five fresh-frozen cadaver lower extremities were tested in 12 positions under three axial loads of 490, 686, and 980 N. Fuji film served as the pressure transducer and the prints were analyzed by a computerized video digitizer. The results demonstrated that as the foot was moved into inversion or eversion with the ankle in neutral flexion or dorsiflexion, there was a decrease in total contact area and an increase in the average high pressure. In plantarflexion, the contact area was lower and the average high pressure was higher, indicating a greater force per unit area as compared with dorsiflexion and neutral flexion. In plantarflexion, however, little change was noted with inversion or eversion. In dorsiflexion, the total contact area was higher and the average high pressure slightly lower as compared with neutral flexion. With inversion, the contact area of the medial facet of the ankle increased and with eversion it increased on the lateral facet, especially in dorsiflexion. With an increase in loading, the pressure did not significantly increase but the contact area did increase. The centroid of the contact moved anteriorly to posteriorly on the talus as the joint moved from dorsiflexion to plantar-flexion.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Foot Ankle Intjournal_title
Foot & ankle internationalauthors
Calhoun JH,Li F,Ledbetter BR,Viegas SFdoi
10.1177/107110079401500307subject
Has Abstractpub_date
1994-03-01 00:00:00pages
125-33issue
3eissn
1071-1007issn
1944-7876journal_volume
15pub_type
杂志文章abstract:BACKGROUND:Little is known about functional outcomes of ankle arthroplasty compared with arthrodesis. This study compared pre-surgical and post-surgical gait measures in both patient groups. METHODS:Eighteen patients with end-stage ankle arthritis participated in an ongoing longitudinal study (pre-surgery, 12 months p...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.3113/FAI.2012.0282
更新日期:2012-04-01 00:00:00
abstract:BACKGROUND:The flexor to extensor transfer of the flexor digitorum longus (FDL) tendon has been a relatively common operative procedure for the treatment of a flexible hammer toe deformity and chronic metatarsophalangeal (MTP) joint dislocation. A possible complication of using the tunnel technique rather than the tend...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100714565927
更新日期:2015-05-01 00:00:00
abstract:BACKGROUND:Limited ankle joint dorsiflexion passive range of motion (PROM) has been associated with common chronic lower extremity conditions, and clinicians often instruct patients in stretching exercises to increase dorsiflexion. However, little is known about how subtalar joint (STJ) position affects dorsiflexion at...
journal_title:Foot & ankle international
pub_type: 杂志文章,随机对照试验
doi:10.1177/1071100713513433
更新日期:2014-01-01 00:00:00
abstract:BACKGROUND:Subtalar bone-block distraction arthrodesis using structural autograft carries the risk of donor site morbidity. Recent reports suggest that structural allograft may be an attractive alternative to structural autograft in subtalar arthrodesis. This prospective study analyzes subtalar distraction arthrodesis ...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.3113/FAI.2008.0561
更新日期:2008-06-01 00:00:00
abstract::We describe three cases of low-energy injuries to the midfoot resulting in rupture of Lisfranc's ligament without tarsometatarsal injury. Examination of the feet revealed an obvious physical sign only on weightbearing, and all three patients were noted at surgery to have intercuneiform instability in association with ...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110079902000912
更新日期:1999-09-01 00:00:00
abstract::The purpose of this ex vivo biomechanical study was to determine the strength and stiffness of the anterior and posterior syndesmotic tibiofibular ligaments and the posterior tibiotalar component of the deltoid ligament. Injuries to these ligaments are a prevalent clinical problem, yet little is known about their mech...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070302400509
更新日期:2003-05-01 00:00:00
abstract:BACKGROUND:Conventional treatment for tibiotalar joint arthritis relies on arthrodesis or prosthetic arthroplasty. Fresh osteochondral allografting is an alternative procedure to replace diseased articular cartilage. METHODS:Eleven patients (average age 43 years; range 18 to 65 years) had fresh osteochondral grafting ...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070502601002
更新日期:2005-10-01 00:00:00
abstract:BACKGROUND:Obesity is a growing problem in Europe and the United States. While obesity has been linked to poor outcomes after total knee or hip replacement, there are no data addressing outcomes in obese patients who underwent total ankle replacement (TAR). METHODS:This retrospective chart review included 118 patients...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.3113/FAI.2011.0925
更新日期:2011-10-01 00:00:00
abstract:BACKGROUND:Chronic ankle instability has a well-known association with intra- and extraarticular ankle pathologies, including peroneal tendonitis and subluxation. Patients with peroneal pathology are at risk for failure of conservative treatment for their ankle instability, thus identifying these patients is important ...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100714556759
更新日期:2015-03-01 00:00:00
abstract:BACKGROUND:Squamous cell carcinoma arising from chronic osteomyelitis is uncommon, and although most occur in the lower extremities, occurrence in the foot and ankle is rare. METHODS:Between February, 1991, and May, 2003, we treated 14 patients (13 men and one woman) with squamous cell carcinomas arising in chronic os...
journal_title:Foot & ankle international
pub_type: 杂志文章,评审
doi:10.1177/107110070402501109
更新日期:2004-11-01 00:00:00
abstract:BACKGROUND:Plantar fasciitis is a relatively common disorder of the foot, yet little is known about its prevalence, what types of physicians see patients with the disorder, or how, on a national scale, patients are typically managed. The purpose of this study was to generate national estimates of the volume of patient ...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070402500505
更新日期:2004-05-01 00:00:00
abstract::Bilateral weightbearing anteroposterior and lateral radiographs were analyzed in 43 patients with a clinical diagnosis of posterior tibial tendon insufficiency by two independent observers. The radiographs of each patient's asymptomatic foot was considered to serve as the control for the preexistance of pes planus. Th...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110079701800208
更新日期:1997-02-01 00:00:00
abstract::In 105 rabbits the course of healing was examined at one, two, four, eight and 12 weeks (21 rabbits per group) after an experimental Achilles tendon rupture. The following treatment modalities were compared: A) primary functional treatment; B) operative functional treatment (resorbable suture); and C) operative functi...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070202300704
更新日期:2002-07-01 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 aims of this study were to determine the severity of metatarsalgia of the second through fifth rays after shortening of the first ray for correction of hallux valgus deformity and patient satisfaction of the cosmetic results. METHODS:Two hundred and forty metatarsal osteotomies (Wilson osteotomy as modi...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.3113/FAI.2007.0011
更新日期:2007-01-01 00:00:00
abstract::A prospective case-control study was performed comparing axial and coronal CT scan images of 11 patients (14 ankles) with chronic lateral instability and 12 controls. Scans were performed in a standardized fashion to simulate weight-bearing. Nine measurements to evaluate the alignment of the hindfoot and forefoot were...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070202300107
更新日期:2002-01-01 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:BACKGROUND:Ankle fractures in patients with diabetes mellitus (DM) can be difficult to manage, especially in the presence of peripheral neuropathy. In patients who fail initial operative management, attempts at limb salvage can be challenging, and no clear treatment algorithm exists. This study examined outcomes of dif...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100716676063
更新日期:2017-03-01 00:00:00
abstract:RECOMMENDATION:The optimal antibiotic treatment after foot/ankle fractures or fusion should be determined based on the result of culture. In the absence of culture results, administered antibiotics should include coverage against common pathogens such as Staphylococcus aureus. LEVEL OF EVIDENCE:Strong. DELEGATE VOTE:...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100719861644
更新日期:2019-07-01 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:A few studies report correlations between radiographic and anatomic measurements of the distal metatarsal articular angle (DMAA). However, little is known about how the DMAA correlates with the hallux valgus angle (HVA) and with anatomic and clinical radiographic measurements. METHODS:We dissected, measured...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100714522027
更新日期:2014-04-01 00:00:00
abstract::Twenty-two adult diabetic patients with clinical suspicion of foot and/or ankle infection were prospectively evaluated using radiography, technetium-99m methylene diphosphonate bone scanning (99mTc), indium-111-labeled leukocyte scanning (111In), and gallium-67 scanning (67Ga) to determine the presence of clinically s...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110079601700103
更新日期:1996-01-01 00:00:00
abstract::Twenty-nine feet in 28 patients who underwent subtalar distraction bone block fusion for the treatment of subtalar deformities associated with symptomatic arthrosis were evaluated. All patients were assessed with the American Orthopaedic Foot and Ankle Society (AOFAS) Ankle-Hindfoot Scale score. Eighteen men and 10 wo...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110079701801206
更新日期:1997-12-01 00:00:00
abstract::Plantar heel pain syndrome has been attributed to entrapment neuropathy, plantar fasciitis, calcaneal spurs, and stress fractures of the calcaneus. Although deteriorated mechanical properties of the heel pads may play an important role in the pathogenesis of heel pain syndrome, this has received little notice. In this...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110079902001010
更新日期:1999-10-01 00:00:00
abstract::Morbus Ledderhose is a rare hyperproliferative disease of the plantar fascia, leading to the formation of nodules. Its origin is unknown. No causal therapy is available, and treatment remains symptomatic. Various therapeutic strategies to alleviate symptoms are available and are adapted to the severity of the disease....
journal_title:Foot & ankle international
pub_type: 杂志文章,评审
doi:10.1177/1071100713505535
更新日期:2013-12-01 00:00:00
abstract::Proximal chevron first metatarsal osteotomy with lateral capsulotomy, adductor tenotomy, and binding of the first and second metatarsals was reviewed in 88 consecutive cases. Seventy-two cases in 55 patients are reported, with an average clinical follow-up of 41 months. The hallux valgus angle improved an average of 1...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110079801900703
更新日期:1998-07-01 00:00:00
abstract::A patient presented with bilateral neuromas of medial dorsal nerves of the great toes. She had a 3-year history of localized tenderness and an "electric" type of pain. At surgery, neuromas of the dorsal medial digital nerves were identified and removed. The patient's symptoms resolved completely. ...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110079601700711
更新日期:1996-07-01 00:00:00
abstract:BACKGROUND:Proximal chevron osteotomy with a distal soft tissue procedure has been widely used to treat moderate to severe hallux valgus deformities. However, there have been no studies comparing the results of proximal chevron osteotomy between patients with moderate and severe hallux valgus. We compared the results o...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.3113/FAI.2012.0637
更新日期:2012-08-01 00:00:00
abstract:BACKGROUND:Extra-articular dorsal closing wedge osteotomy has been used with successful results for Freiberg disease; however, there has been concern regarding the technical difficulty. The purpose of this study was to address technical tips and report on the clinical and radiographic outcome using Kirchner wire-assist...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100712460185
更新日期:2013-01-01 00:00:00
abstract:BACKGROUND:Evans showed that lengthening the lateral column by inserting structural bone graft into the anterior calcaneus could correct abduction and valgus deformity in flatfoot. To better understand the mechanism of correction and the three-dimensional effect of this procedure a cadaver study was done. METHODS:Thre...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070502600209
更新日期:2005-02-01 00:00:00