Abstract:
BACKGROUND:The moment, a force applied at a distance, is responsible for movement and balance. A key component of the moment is the moment arm. The moment arms of nine muscles surrounding the ankle complex during motion in three planes, were studied. MATERIALS AND METHODS:Five cadaveric feet were mounted in a testing device that created moments in the sagittal, coronal and transverse planes. Axial and tendon loads were applied as the foot was passively moved in these planes. Tendon excursions and bone kinematics were monitored. The moment arm was calculated using the tendon excursion method and averaged across all specimens. RESULTS:The largest average moment arm during plantarflexion/dorsiflexion, was the Achilles (mean, 53.1; SD, 5.1 mm). During internal/external rotation the largest moment arm was the peroneus brevis (mean, 20.5; SD, 6.4 mm). During inversion/eversion, the largest moment arm was the peroneus longus (31 mm; SD, 2.3 mm). CONCLUSION:This study quantified the functional moment arms of nine tendons of the ankle/foot. The involvement of multiple tendons in multiple planes of motion should be considered in computational models and when deciding treatments. CLINICAL RELEVANCE:The correlation between moment arms and muscle function has significant effects on treatment efficacy. Information on the balance of moments around the ankle will assist in achieving optimal biomechanical behavior following operative treatments.
journal_name
Foot Ankle Intjournal_title
Foot & ankle internationalauthors
McCullough MB,Ringleb SI,Arai K,Kitaoka HB,Kaufman KRdoi
10.3113/FAI.2011.0300subject
Has Abstractpub_date
2011-03-01 00:00:00pages
300-6issue
3eissn
1071-1007issn
1944-7876pii
50049373journal_volume
32pub_type
杂志文章abstract:BACKGROUND:The reported fusion rates of revision arthrodesis for hindfoot nonunions are relatively low compared to primary procedures. Exogenous ultrasound has been shown to accelerate the healing process of acute fractures and fracture nonunions but has not been previously evaluated for the treatment of hindfoot pseud...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070602700401
更新日期:2006-04-01 00:00:00
abstract:BACKGROUND:Hallux valgus surgery is associated with significant early postoperative pain. The aim of this study was to investigate the use of continuous wound infiltration (CWI) with ropivacaine for pain management after hallux valgus surgery. METHODS:In this prospective, randomized, double-blind, and placebo-controll...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100717736292
更新日期:2018-02-01 00:00:00
abstract:BACKGROUND:Ankle sprains are the most common injury among physically active people, with common sequelae including repeated episodes of giving way, termed functional ankle instability. Copers are a cohort in ankle research comprised of those who have sprained their ankle but have not suffered any further dysfunction. T...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100713491076
更新日期:2013-10-01 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 use of single-photon-emission computed tomography (SPECT) in identifying unexplained pain in the foot and ankle has been described, where other imaging modalities have failed. The investigation of a painful total ankle replacement (TAR) is difficult, often not delineating a definitive cause. Our aim in t...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100715573050
更新日期:2015-06-01 00:00:00
abstract:BACKGROUND:Recurrent pain and deformity following forefoot surgery can cause significant patient disability. In patients with rheumatoid arthritis, first metatarsophalangeal (MTP) joint arthrodesis with lesser metatarsal head resections-termed the rheumatoid forefoot reconstruction-has been shown to be a reliable opera...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100717696253
更新日期:2017-06-01 00:00:00
abstract:BACKGROUND:One of the goals of the AOFAS website is to provide easily understandable information about orthopaedic foot and ankle conditions to the public. However, validation of this goal has not been conducted. Evaluation of text reading level is frequently performed using the Flesch-Kincaid formula (FKF). This study...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.3113/FAI.2009.0287
更新日期:2009-04-01 00:00:00
abstract:BACKGROUND:Little information is available on the American Orthopaedic Foot and Ankle Society (AOFAS) outcome tool and its capacity to show changes and improvement in function of patients without a floor or ceiling effect. The purpose of the study was to compare results from the Musculoskeletal Functional Assessment (M...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.3113/FAI.2006.0788
更新日期:2007-07-01 00:00:00
abstract:BACKGROUND:The treatment of osteochondral lesion of the talus (OLT) is mainly based upon the stage of the disease so accurate imaging is crucial. SPECT/CT combines bone scan with high-resolution CT and can provide functional-anatomical images in a single stage. The purpose of this study was to assess the value of SPECT...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.3113/FAI.2011.0233
更新日期:2011-03-01 00:00:00
abstract::The purpose of this study was to quantify tibiotalar translation and rotation under various stages of fibular displacement and injury to the syndesmotic and deltoid ligaments. Ten unpaired specimens amputated below the knee were studied using an unconstrained testing apparatus. The specimens were moved through a dorsi...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110079902001110
更新日期:1999-11-01 00:00:00
abstract:BACKGROUND:Charcot arthropathy is a chronic, progressive destructive process affecting bone architecture and joint alignment in people lacking protective sensation. The etiologic factors leading to progressive bone resorption have not been elucidated. The purpose of this study was to histologically examine surgical spe...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070602701007
更新日期:2006-10-01 00:00:00
abstract:BACKGROUND:The hyperplantarflexion variant ankle fracture is composed of a posterior tibial lip fracture with posterolateral and posteromedial fracture fragments separated by a vertical fracture line. This infrequently reported injury pattern often includes an associated "spur sign" or double cortical density at the in...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100714553470
更新日期:2015-02-01 00:00:00
abstract:BACKGROUND:Suture anchors have been developed for the fixation of ligaments, capsules, or tendons to bone. These devices have led to improved fixation, smaller incisions, earlier limb mobility, and improved outcomes. They were originally developed for use in shoulder reconstructions but are now used in almost all extre...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070502600703
更新日期:2005-07-01 00:00:00
abstract::The use of locking plate technology in foot and ankle surgery has increased over the last decade. Reported applications include fracture repair, deformity correction, and arthrodesis. There is limited evidence, however, to guide clinicians with regard to the appropriate and optimal use of this technology. This work ai...
journal_title:Foot & ankle international
pub_type: 杂志文章,评审
doi:10.1177/1071100714523274
更新日期:2014-05-01 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:BACKGROUND:Nonunion risk factor identification and modification are subjective. We describe and validate a predictive nonunion risk factor model to identify foot and ankle operative patients at risk for nonunion. MATERIALS AND METHODS:One hundred international experts in foot and ankle surgery were surveyed. Nineteen ...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100715577789
更新日期:2015-08-01 00:00:00
abstract::Over a 3-year period, 47 displaced intra-articular fractures of the os calcis in 43 patients underwent open reduction and internal fixation. A significant feature of this series is that computed tomography was used to assess all fractures both before and after surgery. Seventy-seven percent demonstrated a consistent f...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110079401500501
更新日期:1994-05-01 00:00:00
abstract:BACKGROUND:Symptomatic large hallux valgus deformities commonly require surgical intervention with a proximal metatarsal osteotomy. A number of fixation methods have been described for proximal chevron osteotomies; one of the most recent is locking plates. METHODS:We retrospectively reviewed the records of 16 consecut...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.3113/FAI.2007.0361
更新日期:2007-03-01 00:00:00
abstract:BACKGROUND:Lateral column lengthening is used to correct abduction deformity at the midfoot and improve talar head coverage in patients with flatfoot deformity. It was our hypothesis that following a stepcut lengthening calcaneal osteotomy (SLCO), patients would have adequate correction of the deformity, a high union r...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100715574933
更新日期:2015-07-01 00:00:00
abstract:BACKGROUND:A previous study has shown an increased radiographic prevalence and severity of hallux valgus interphalangeus (HVIP) after surgical correction of hallux valgus (HV) due to correction of pronation deformity. The purpose of this study was to evaluate the change in pre- and postoperative HVIP deformity with cor...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/1071100715579905
更新日期:2015-08-01 00:00:00
abstract:BACKGROUND:In this retrospective study, both the patients' and surgeons' satisfaction with resection of the first through fifth metatarsal heads for long-standing rheumatoid forefoot deformity was evaluated. METHODS:Thirty-four patients (56 feet) had first through fifth metatarsal head resection. After a mean time of ...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070602700804
更新日期:2006-08-01 00:00:00
abstract:BACKGROUND:The purpose of this study was to review consecutive fifth metatarsal fractures in the author's (KFK) practice from August, 1999, to November, 2003. METHODS:During this period 64 patients (66 fractures; 35 tuberosity fractures, 10 Jones fractures, three stress fractures, two segmental shaft fractures and 16 ...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070502600907
更新日期:2005-09-01 00:00:00
abstract::The purpose of this study was to evaluate the biomechanical properties of commonly used autogenous transplants for the surgical stabilization of chronic lateral ankle instability. We dissected the transplants (peroneus longus, peroneus brevis, Achilles and plantaris tendon, periosteal flap, fascia, corium) and the ant...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070202300714
更新日期:2002-07-01 00:00:00
abstract:HYPOTHESIS:Rheumatoid arthritis is a common disabling form of arthritis that frequently affects the hands and feet. With time, the majority of affected individuals will become disabled. METHODS:Sixty-nine consecutively selected mild to moderately affected individuals with rheumatoid arthritis provided demographic data...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110070402500105
更新日期:2004-01-01 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
abstract::Isolated dislocations of the middle cuneiform are uncommon. There have been four reported previously. Significant force is required to produce these injuries, and they can have serious neurovascular consequences. In this case report and review of the literature, we present an isolated middle cuneiform dislocation in a...
journal_title:Foot & ankle international
pub_type: 杂志文章,评审
doi:10.1177/107110079701801110
更新日期:1997-11-01 00:00:00
abstract:BACKGROUND:Wide variations in definitions of lesser toe deformities exist. In addition, a general consensus regarding treatment of lesser toe deformities is lacking. The objective of this study was to evaluate of the definitions, current concepts, and treatment protocols for lesser toe deformities among orthopaedic dep...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.3113/FAI.2007.1265
更新日期:2007-12-01 00:00:00
abstract::Achilles tendinosis is a degenerative overuse tendinopathy involving the primary ankle plantarflexors, namely the soleus and gastrocnemius muscles forming the tendo Achilles. The Orthopaedic Research Institute-Ankle Strength Testing System (ORI-ASTS) was designed to record objective measurements of force generated wit...
journal_title:Foot & ankle international
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1177/107110070202300206
更新日期:2002-02-01 00:00:00
abstract:BACKGROUND:Over the past 20 years, ankle arthrodesis with use of screw augmentation has become a popular technique to gain fusion of the arthritic ankle. The objective of this cadaver study was to identify the risks to local neurovascular structures using standard operative practices for percutaneous guide pin placemen...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.3113/FAI.2007.0614
更新日期:2007-05-01 00:00:00
abstract::Twelve patients underwent successful tibiotalocalcaneal arthrodesis using a locked intramedullary nail with posterior moldable bone grafting. Two of the patients developed a nondisplaced stress fracture around the proximal interlocking screws, which responded to immobilization at 8 and 15 months after surgery. In 7 of...
journal_title:Foot & ankle international
pub_type: 杂志文章
doi:10.1177/107110079902000806
更新日期:1999-08-01 00:00:00