Abstract：
:In 15 normal adults an advanced biomechanical analysis of walking patterns at slow, natural, and fast cadences showed that the ankle had two mechanical power phases: a negative work phase during weight acceptance, followed by a dominant burst of positive work at push-off. The knee had four power phases: a negative work phase at weight acceptance, a small positive work phase during mid-stance, a major negative work burst at push-off and early swing, and a final energy-absorbing phase at the end of swing. The power phases at the hip are quite irregular and somewhat lower than those at the knee and ankle. The dominant positive work burst by the plantarflexors drops as speed decreases, but less rapidly than the positive work by the knee muscles during midstance. The energy absorption by the quadriceps during weight acceptance decreases rapidly as speed decreases and at late stance decreases moderately. The energy absorption by the ankle plantarflexors during weight acceptance remains fairly constant at all walking speeds, and the absorption by the knee flexors at end of swing drops only slightly as cadence decreases.
journal_name
Clin Orthop Relat Resjournal_title
Clinical orthopaedics and related researchauthors
Winter DAsubject
Has Abstractpub_date
1983-05-01 00:00:00pages
147-54issue
175eissn
0009-921Xissn
1528-1132pub_type
杂志文章abstract：:Multiple myeloma and solitary plasmacytoma are common reticuloendothelial diseases. They involve primarily the bone marrow but have occasional extramedullary components. Numerous complications have been reported with these diseases. Despite modern modes of therapy, the prognosis remains grim. Myeloma and plasmacytoma ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1986-03-01 00:00:00
abstract：:Analysis of bilateral EMG and operative findings reveal that there is a definite correlation between bilateral positive EMG in particular and multiradicular EMG's and the findings of stenosis or spondylosis of the lumbar canal. Electromyography is helpful in identifying the atypical patient or the patient with unilate...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1976-03-01 00:00:00
abstract：BACKGROUND:Vitamin D plays an essential role in bone health and muscle function. Some studies have shown a widespread rate of vitamin D deficiency in the general population, but few have reported on the vitamin D status of orthopaedic patients. QUESTIONS/PURPOSES:We investigated (1) the extent of hypovitaminosis D in ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-013-2996-5
更新日期：2013-09-01 00:00:00
abstract：:The regeneration of bone remains an elusive yet important goal in the field of orthopaedic surgery. Despite its limitations, autogenous cancellous bone grafting continues to the most effective means by which bone healing is enhanced clinically. Biosynthetic bone grafts currently are being developed as an alternative t...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：10.1097/00003086-199910001-00011
更新日期：1999-10-01 00:00:00
abstract：BACKGROUND:Childhood obesity is associated with reduced quality of life, physical fitness, and a higher prevalence of lower extremity (LE) pain; however, it is unclear whether and how these factors are related. QUESTIONS/PURPOSES:For this study we asked if obese children with LE pain (LE+) had higher BMI-Z scores, low...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-012-2620-0
更新日期：2013-04-01 00:00:00
abstract：:Reports using the Constant-Murley score often lack details regarding how strength measurement was performed, which may have an important impact on the results obtained. A description of the measurement is especially important when patients are unable to adopt the prescribed position of 90 degrees shoulder abduction, l...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-009-1007-3
更新日期：2010-06-01 00:00:00
abstract：BACKGROUND:Studies suggest, even when controlling for disease severity, socioeconomic status, education, and access to care, racial and ethnic minorities receive lower-quality health care and have worse perceived pain and function before and after total joint arthroplasty. QUESTION/PURPOSES:We evaluated the influence ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-011-1841-y
更新日期：2011-07-01 00:00:00
abstract：:The natural history of degenerative lumbar spinal stenosis is documented poorly. Little is known about the efficacy of nonoperative treatments. An aggressive nonoperative treatment consisting of therapeutic exercise, analgesics, and epidural steroid injections is proposed. The clinical evaluation of the patients is re...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-200103000-00018
更新日期：2001-03-01 00:00:00
abstract：:Zenoderm (Ethicon Ltd., Edinburgh, Scotland) is porcine skin dermis specially treated so as to be weakly antigenic when implanted. Its use as an extradural spinal and nerve root membrane to reduce postoperative adhesions after laminectomy was tested in 22 rabbits with laminectomy in the second and fourth lumbar verteb...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1987-02-01 00:00:00
abstract：BACKGROUND:Preoperative depressive symptoms have been shown in some but not all studies to be associated with poor self-reported pain and function outcomes. In addition, depressive symptoms after surgery have been shown to improve relative to preoperative levels. QUESTIONS/PURPOSES:We hypothesized that (1) preoperativ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,多中心研究
doi：10.1007/s11999-015-4203-3
更新日期：2015-11-01 00:00:00
abstract：:External malrotation is a frequent complication following Ender nailing. Biomechanical studies demonstrate that the standard Ender nail tends to produce external malrotation when the fracture is unstable. This type of malrotation does not develop to the same degree if the nails are bent into a 25 degree angle of antev...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1980-03-01 00:00:00
abstract：:Osteogenic protein-1 (also known as bone morphogenetic protein-7) is a member of the bone morphogenetic protein family. Several of the bone morphogenetic proteins, including osteogenic protein-1, have been shown to form bone at an ectopic site. However, optimal dosing regimens for the use of osteogenic protein-1 and o...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/01.blo.0000129161.54751.8c
更新日期：2004-06-01 00:00:00
abstract：:Of 221 children with head injuries and resultant deep coma followed for long-term problems, 156 became totally independent, functional individuals, only 61 lacking normal cognition and speech. Reconstructive surgical procedures for residual spasticity was necessary in 45 patients. Achilles lengthenings were the most c...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-197507000-00035
更新日期：1975-07-01 00:00:00
abstract：:The fundamental difference of the Ilizarov fixator is the type of pins used for bone fixation, i.e., Kirschner wires 1.5 mm and 1.8 mm in diameter, pretensioned from 50 to 130 kg before being affixed to the rings that are connected and fixed by threaded rods. The mechanical characteristics of external fixators may inf...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1993-08-01 00:00:00
abstract：:The aim of this study was to describe the course of untreated or conservatively treated arthrosis of the knee joint. Of 265 patients presenting with knee pain who had weightbearing radiographs taken between 1970 and 1973, 132 (33 men and 99 women) responded to and participated in a clinical followup 20 years later usi...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-199707000-00019
更新日期：1997-07-01 00:00:00
abstract：BACKGROUND:Cementless fixation remains controversial in TKA due to the challenge of achieving consistent skeletal attachment. Factors predicting durable fixation are not clearly understood, but we presumed bone ingrowth could be enhanced by the quantity of host bone and application of autograft bone chips. QUESTIONS/P...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-011-2214-2
更新日期：2012-07-01 00:00:00
abstract：:Histomorphologic analyses of artificial joint components implanted into bone need special technology for processing and for documentation; published histological work systematically done therefore is rare. The histopathology, three-dimensionally analyzed in a complete sequence of sections is, however, the only precise...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：10.1097/01.blo.0000150424.59854.7b
更新日期：2005-01-01 00:00:00
abstract：:Osteoblastic and chondroblastic (i.e., osteogenic) cells belong to the stromal cell system, which is associated with bone marrow, and bone and is separate from the hematopoietic stem-cell system. Stromal stem cells are capable of producing reticular, fibroblastic, osteogenic, and adipose stromal lines. Marrow-derived ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：
更新日期：1990-03-01 00:00:00
abstract：:The main objective of the current investigation was to regenerate cells of the nucleus pulposus without loss of phenotype. Nucleus pulposus cells were isolated from intervertebral discs from adult rabbits, grown in monolayer culture, and then maintained as a micromass pellet in tube culture. The specimens were evaluat...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/01.blo.0000063797.98363.d3
更新日期：2003-06-01 00:00:00
abstract：:The authors review the structure and composition of articular cartilage. This tissue is composed of an extensive extracellular matrix synthesized by chondrocytes. It contains different zones with respect to depth from the articular surface and has a regional organization around the chondrocytes. Its composition varies...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：10.1097/00003086-200110001-00004
更新日期：2001-10-01 00:00:00
abstract：:A retrospective analysis of 75 consecutive cases of massive allograft implantations performed from July 1976 to October 1986 was conducted. Seventy percent of these patients had malignant bone tumors. Of the total group, 10 (13.3%) patients developed a deep infection of the allograft and are the subject of this review...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1994-09-01 00:00:00
abstract：:The treatment program after anterior cruciate ligament (ACL) injury or reconstruction at the United States Military Academy embraces the four cornerstones of rehabilitation--strength, aerobic fitness, coordination, and confidence. It is divided into six phases--presurgery, to prepare the patient for postoperative reha...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1983-01-01 00:00:00
abstract：:Sciatic nerve entrapment secondary to trochanteric wiring is a rare but serious complication following total hip arthroplasty (THA) in which the transtrochanteric approach has been used. To eliminate this risk, the authors modified the Charnley drill-and-wire-guide forceps for the femur, an instrument that facilitates...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1985-06-01 00:00:00
abstract：BACKGROUND/RATIONALE:A 10-year survivorship of 100% was reported for patients with PFC cruciate-retaining prostheses. Beyond 10 years, we observed additional polyethylene wear likely related to thin liners gamma-irradiated in air and were concerned this wear might predispose to implant construct failure. QUESTIONS/PUR...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-010-1303-y
更新日期：2010-09-01 00:00:00
abstract：:Elbow dislocations are relatively uncommon in children. Rupture of the brachial artery associated with closed elbow dislocations in children is rare. This is a report of an 8-year-old boy, the youngest patient ever to be reported to have a closed posterior dislocation of the elbow associated with a brachial artery lac...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1993-11-01 00:00:00
abstract：:A prospective study of 570 patients with fracture of the upper end of the femur was carried out between 1967 and 1971 in Jerusalem. Of three distinct ethnic groupings, Western or Ashkenazi females and Eastern or Sephardi males produced the highest incidence of fractured neck of the femur proportional to their makeup i...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1977-01-01 00:00:00
abstract：:The Total Condylar Prosthesis is a non-hinged unit designed to: replace the patellofemoral articulation; improve fixation of the tibial component by means of a stout central peg; permit accurate and reproducible insertion. The cruciate ligaments are excised to obtain better tibial fixation. Instability has not been a ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1976-10-01 00:00:00
abstract：BACKGROUND:Low-cost indigenous megaprostheses used in the developing world are prone to mechanical failure but the frequency and causes are not well established. QUESTIONS/PURPOSES:We retrospectively analyzed the causes of failure, particularly design, and suggest changes to reduce the breakage. We also report our exp...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-010-1409-2
更新日期：2010-11-01 00:00:00
abstract：:Proper femoral and tibial component rotational positioning in TKA is critical for outcomes. Several rotational landmarks are frequently used with different advantages and limitations. We wondered whether coronal axes in the tibia and femur based on the transepicondylar axis in the femur would correlate with anteropost...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-008-0452-8
更新日期：2008-11-01 00:00:00
abstract：BACKGROUND:The majority of metastatic bone lesions to the femoral bone can be treated without surgery or with minimally invasive intramedullary nailing. In rare patients with extensive metastatic disease to the femur, total femur replacement may be the only surgical alternative to amputation; however, little is known a...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999.0000000000000125
更新日期：2018-05-01 00:00:00
