Abstract：
:Despite their increasing clinical use, mobile-bearing total knee replacements have not been well characterized biomechanically. An experimental and finite element analysis was done to assess the mobility and contact mechanics of a widely used rotating platform total knee replacement. Parameters that varied were axial load, condylar load allocation, flexion angle, and static versus dynamic loading. Similar results from the physical model and finite element model lend credence to the validity of the findings. The torque required to initiate rotation (static torque) was greater than that to sustain rotation (dynamic torque). At four times body weight axial load, peak resisting torque measured was 9.47+/-0.61 and 5.51+/-0.38 N-m, for static and dynamic torque, respectively. A 60-40 condylar load allocation produced slightly less resisting torque than the 50-50 load. For all practical purposes, the polyethylene insert rotated simultaneously with the femoral component, leading to maintenance of high contact area, desirable behavior clinically. Walking cycle simulations produced a total axial rotation range of motion of 6 degrees. The high frictional torques observed at the mobile interface may explain why a percentage of these mobile-bearings fail to rotate under routine functional load.
journal_name
Clin Orthop Relat Resjournal_title
Clinical orthopaedics and related researchauthors
Otto JK,Callaghan JJ,Brown TDdoi
10.1097/00003086-200111000-00004subject
Has Abstractpub_date
2001-11-01 00:00:00pages
24-37issue
392eissn
0009-921Xissn
1528-1132pub_type
杂志文章abstract：:Medicolegal aspects of orthopaedic foot and ankle surgery, including issues of standard of care, complications, and discrepancies between patient and physician expectations, generally are similar to those encountered in other orthopaedic subspecialties. However, there are some unique aspects involving foot and ankle s...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：10.1097/00003086-200504000-00012
更新日期：2005-04-01 00:00:00
abstract：:Periostitis in the athlete is a common overuse clinical entity often found in the lower extremity. An analogous overuse syndrome also may occur in the upper extremity. These 2 case reports describe the history, physical findings, radiographic changes, and treatment for periostitis of the upper extremity rarely seen in...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：
更新日期：1996-03-01 00:00:00
abstract：:Gunshot injuries to the hand and upper extremity have been studied during military conflicts and in urban settings. Treatment concepts include identification of injured structures, aggressive surgical wound care, and reconstruction of important functional structures. There are various types of missile injuries. For si...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：10.1097/00003086-200303000-00016
更新日期：2003-03-01 00:00:00
abstract：:Two hundred cases of intracapsular femoral neck fractures have been treated with a multiple parallel pin technique similar to that originated by Austin Moore. The technique employs a personally designed guide which facilitates insertion of multiple parallel pins. The fixation obtained satisfactorily resists shear stre...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1978-11-01 00:00:00
abstract：UNLABELLED:Fractures of the proximal humerus can be treated effectively but require proper characterization. None of the existing classifications intended to facilitate characterization have been satisfactory. We studied proximal humerus fractures using radiographs alone and radiographs plus computed tomography scans t...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/01.blo.0000205899.28856.98
更新日期：2006-07-01 00:00:00
abstract：:Malignant tumors around fracture fixation implants have been reported sporadically for many years. Recently, however, reports of sarcomatous degeneration around a standard cemented hip arthroplasty and around cobalt-chromium-bearing hip arthroplasties raise new questions of the malignant potential of metallic ends pro...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1987-03-01 00:00:00
abstract：:The burgeoning of major research related to the effectiveness and appropriateness of clinical treatment methods as part of efforts to improve the quality of patient care provides added emphasis to consumer needs for certification and recertification. While there are multiple factors involved, the prime consumer questi...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1990-08-01 00:00:00
abstract：:The progression from chronic anterior cruciate instability to degeneration of the knee has been well documented in animal studies. However, the literature is unclear as to the overall consequences with respect to the development of osteoarthritis. The long-term consequences of the anterior cruciate insufficient knee w...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1988-02-01 00:00:00
abstract：:In situ hybridization was employed to study cellular phenotypes in the ossification groove of Ranvier in young rabbits. The expression of Type II collagen mRNA was seen in chondrocytes in all layers of the growth plate. Messenger RNA for the cartilage-specific Type II collagen was also detected in cells of the inner l...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1993-12-01 00:00:00
abstract：:Wound problems can often be prevented with careful planning. When transverse incisions are used for knee surgery many years prior to any anticipated knee arthroplasty, no major problems are typically encountered with a conventional, anterior longitudinal incision. We recommend lateral incisions (eg, after a previous l...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：10.1097/01.blo.0000238821.71271.cc
更新日期：2006-11-01 00:00:00
abstract：:Professionalism as a subject must be taught explicitly. This requires an institutionally accepted definition which then must be learned by both students and faculty. This directs what will be taught, expected, and evaluated. Of equal importance, and more difficult to achieve, is the incorporation of the values and att...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：10.1097/01.blo.0000229274.28452.cb
更新日期：2006-08-01 00:00:00
abstract：:Early diagnosis of adolescent idiopathic scoliosis is essential to prevent severe deformity. The accuracy of thermographic examination of the spine in the detection of minor degrees of curvature has been assessed in 125 asymptomatic young persons mean age 13.4 +/- 0.8 years who were also examined clinically and by spi...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1980-05-01 00:00:00
abstract：UNLABELLED:Residual deformity in resistant clubfoot is not uncommon. The "bean-shaped foot" exhibits forefoot adduction and midfoot supination and may interfere with function due to poor foot placement. For children less than 5 years of age we describe a corrective procedure combining a closing wedge cuboidal osteotomy...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-009-0755-4
更新日期：2009-05-01 00:00:00
abstract：BACKGROUND:Socioeconomic variables influence various healthcare issues in different ways. The effect of socioeconomic variables on the shoulder has not been well studied. Because activity level, defined by how much a patient actually does, is an important patient outcome measure and prognostic factor for the shoulder, ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-016-4946-5
更新日期：2016-10-01 00:00:00
abstract：:This biographical sketch on John Caffey corresponds to the historic text, The Classic: Multiple Fractures in the Long Bones of Infants Suffering From Chronic Subdural Hematoma (1946), available at DOI 10.1007/s11999-010-1666-0 . ...
journal_title：Clinical orthopaedics and related research
pub_type： 传,历史文章
doi：10.1007/s11999-010-1665-1
更新日期：2011-03-01 00:00:00
abstract：:The collagens are products of a superfamily of closely related genes. Currently, there are 13 described collagens encompassing at least 25 separate genes. The collagen molecules can be categorized into four classes. Class I consists of molecules that form the banded collagen fibers that are readily seen by routine ele...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：
更新日期：1992-09-01 00:00:00
abstract：BACKGROUND:Complicated tibial fractures with severe soft tissue trauma are challenging to treat. Frequently associated acute compartment syndrome can result in scarring of muscles with impaired function. Several studies have shown a relationship between angiogenesis and more effective muscle regeneration. Vascular endo...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-012-2456-7
更新日期：2012-12-01 00:00:00
abstract：:Osteogenic proteins, also referred to as BMPs, are a family of bone matrix polypeptides isolated from a variety of mammalian species. These proteins are members of the transforming growth factor-beta superfamily of molecules that contain a highly conserved 7 cysteine transforming growth factor-beta domain in their C-t...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：
更新日期：1996-03-01 00:00:00
abstract：:An all-polyethylene cementless tibial component was used in 221 total knee arthroplasties. With one exception, failures did not occur before three years. Failure was characterized by medial subsidence of the tibial component. There was abrasion of the polyethylene on the undersurface of all components that failed. Sur...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1990-11-01 00:00:00
abstract：:This is a report on a University of Illinois Hospital series of cases of extracapsular base of the neck osteotomy for slipped capital femoral epiphyses. The osteotomy was performed on 20 hips in 16 patients, with a 71/2 year average follow-up. The results of this procedure are encouraging and illustrate the advantages...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1978-05-01 00:00:00
abstract：:Three patients had distraction osteogenesis as a salvage method for infected endoprostheses. At the first operation, the infected prosthesis was removed and stabilization was achieved with an external fixator to preserve limb length. An additional external fixator was applied later for distraction osteogenesis after e...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/01.blo.0000128215.33603.4c
更新日期：2004-07-01 00:00:00
abstract：:Gout commonly occurs as an acute arthritis. In a 64-year-old man, gout was associated with a proliferative hemosiderin-laden synovitis. The association of recurrent atraumatic hemarthrosis seems not to have been reported in the literature on gout. ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1992-04-01 00:00:00
abstract：:A multicenter retrospective review was performed analyzing 1081 primary total hip replacements in 944 patients using the Harris Galante-I cementless acetabular component with screw fixation. All patients were followed up for a minimum of 5 years with a mean followup of 81 months. Linear polyethylene wear averaged 0.11...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,多中心研究
doi：10.1097/00003086-199912000-00016
更新日期：1999-12-01 00:00:00
abstract：:A 60-year-old man had severe unilateral wrist flexion contracture associated with psoriatic arthritis mutilans. Proximal row carpectomy provided realignment of the carpus. Arthrodesis occurred spontaneously in functional position. ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1980-11-01 00:00:00
abstract：:Polycentric total knee arthroplasty has been performed at the Mayo Clinic on more than 1,600 knees since July 1970. Two groups of 106 and 101 knee arthroplasties performed between July 1970 and July 1971 and June 1971 and January 1972, respectively, were compared at 5 and 7 years. The technique used exposed the joint ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1979-11-01 00:00:00
abstract：BACKGROUND:Unicompartmental knee arthroplasty restores function and improves pain in appropriately selected patients. Scant evidence exists regarding the treatment of periprosthetic joint infection (PJI) after unicompartmental knee arthroplasty (UKA). QUESTIONS/PURPOSES:(1) What was the overall survivorship free from ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/CORR.0000000000000372
更新日期：2019-01-01 00:00:00
abstract：:Three cases of an isolated femoral component failure of a hip surface replacement were treated by use of a press-fit bipolar prosthesis to articulate with the retained acetabular cup. At two to three years post-surgery (average, 31 months), these three conversions had good clinical function and maintained an acceptabl...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1986-07-01 00:00:00
abstract：PURPOSE:A giant cell tumor (GCT) of bone presenting in the distal radius is rare, however, when they occur, Campanacci Grade III tumors can present formidable reconstructive challenges. They are associated with a high local recurrence rate with intralesional treatment, therefore approaches to reconstruct the wrist afte...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-016-4975-0
更新日期：2016-12-01 00:00:00
abstract：:Fifty-two Stanmore hinged knee replacements were used as revision arthroplasties for failed arthroplasties. The patients were followed for a mean of 44.7 months. On clinical examination, 23% had good, 48% fair, and 29% poor results. Worst results were achieved when revising bulkier or more constrained primary knee joi...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1987-07-01 00:00:00
abstract：BACKGROUND:Osteoid osteoma has a nidus surrounded by sclerotic bone with a size usually less than 20 mm. Its diagnosis is made on typical presentation of nocturnal pain and imaging findings. Excision of the niduses, which are often small and difficult to precisely identify, sometimes may result in resection of surround...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-010-1265-0
更新日期：2010-07-01 00:00:00
