Abstract：
:Modular components allow for the customization of hip replacements to the individual patient. Modular head-neck components allow for mixed material systems to minimize polyethylene wear as well as provide the ability to vary neck length and head size independent of the stem. Modular interfaces, however, result in an increased susceptibility to interface corrosion and wear debris generation. One hundred eight uncemented femoral stems with modular heads retrieved for reasons other than loosening with modular heads were examined for interface corrosion. In addition, in an effort to quantify the amount of wear debris generated at modular interfaces due to cyclic loading, mechanical testing and electrozone particle analysis was used to study various surface, material, and design combinations. Detectable degrees of corrosion were observed in ten of 29 (34.5%) mixed alloy systems and seven of 79 (9%) single alloy components at an average of 25 months in situ. There was no correlation between presence or extent of corrosion or surface damage with time in situ, initial diagnosis, reason for removal, age, or weight. Stems with corrosion were less likely to have bone ingrowth histologically. The results of mechanical testing showed a significant number of wear particles were generated by all head-neck combinations. The wear debris was almost totally in the size range less than 5 microns. As many as 2.5 million particles were generated the first million cycles loading, with as many as eight million particles generated at ten million cycles. The results indicate that surface preparation and material affect particle generation. Head-neck tolerance mismatch appears to be significantly variable in the number of particles generated.
journal_name
Clin Orthop Relat Resjournal_title
Clinical orthopaedics and related researchauthors
Cook SD,Barrack RL,Baffes GC,Clemow AJ,Serekian P,Dong N,Kester MAsubject
Has Abstractpub_date
1994-01-01 00:00:00pages
80-8issue
298eissn
0009-921Xissn
1528-1132pub_type
杂志文章abstract：:Patients with shoulder arthritis present to the orthopedic surgeon due to joint pain and loss of shoulder motion. A differential diagnosis is established, based on the history and physical examination and selected laboratory tests and roentgenograms. Synovial fluid analysis is often very helpful in the diagnosis of sh...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1983-03-01 00:00:00
abstract：BACKGROUND:Ankle arthrodesis may be achieved using the Ilizarov method. Comorbidities, such as diabetes, Charcot neuroarthropathy, osteomyelitis, leg length discrepancy, and smoking, can make an ankle fusion complex and may be associated with lower rates of healing. QUESTIONS/PURPOSES:We asked if (1) smoking and other...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-012-2470-9
更新日期：2012-10-01 00:00:00
abstract：:Scoliosis in Marfan's syndrome may be painful, but severe spondylolisthesis with a cauda equina tension syndrome as the cause of pain has only recently been recognized. Scoliosis may be associated with spondylolisthesis. The scoliosis may be sciatic or structural. These may be true structural curves or secondary to th...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1987-08-01 00:00:00
abstract：:No agreement exists on how coordinate flexion and extension movements of the interphalangeal joints of the long fingers of the hand are performed. A cinematic study in 18 healthy volunteers was done to assess the objective sequence of beginning and ending of movement in the eight free movements of the hand in which th...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1999-05-01 00:00:00
abstract：:The role of local heat or cold therapy used in conjunction with exercise in the rehabilitation of total knee arthroplasty patients was investigated. Thirty-six osteoarthritic patients were analyzed. Parameters evaluated were range of motion, swelling about the knee, and pain. All patients received the total condylar k...
journal_title：Clinical orthopaedics and related research
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：1983-09-01 00:00:00
abstract：:Division of the posterior cruciate ligament in amputation specimens enables one to classify injuries as: (a) isolated posterior cruciate ligament injuries with or without damage of the posterior capsule; or (b) injuries of the posterior cruciate ligament plus lateral and/or medial structures which may be associated wi...
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：:A classification and plan of management for carpal dislocations are presented, based upon the following basic premises: perilunate and lunate dislocations are different stages of the same injury and are therefore managed identically; displacement may be either dorsal or volar; anatomic restoration of the 3 key element...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1980-06-01 00:00:00
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 ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-200111000-00004
更新日期：2001-11-01 00:00:00
abstract：:In 1987, after 11 years of research, press fit titanium circumferential grommets were introduced for arthroplasty of the metacarpophalangeal joint to protect the flexible hinge implant midsection from sharp bony edges and shearing forces that can initiate implant abrasions and tears leading to implant fracture and for...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1997-09-01 00:00:00
abstract：:A modified Ilizarov external fixator was used to transfix the stifle joint in 13 dogs. A 1-cm cortical cancellous bone plug was outlined in the intracondylar notch of the femur after excising the anterior (cranial) cruciate ligament (ACL). Hardware attached to the plug allowed controlled distraction of the plug into a...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1992-07-01 00:00:00
abstract：:Many patients with acute herniated nucleus pulposus can be expected to resolve their conditions with conservative management. To date, however, no reliable sign has been described in the literature that can predict which patient will respond. This report shows that the ability to achieve normal lumbar extension repres...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1986-01-01 00:00:00
abstract：:Four hundred twenty-one posterior cruciate condylar total knee arthroplasties were performed between 1975 and 1983. Anatomic alignment of the knee was recorded on follow-up evaluations from two months to 13 years postoperatively. Patients were stratified into a normal group that was 5 degrees to 8 degrees anatomic val...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1994-02-01 00:00:00
abstract：:The insertion of cement and femoral prosthesis in total hip replacement produces biochemical abnormalities. These are thought to be caused by a marked rise in intramedullary pressure. Surgeons aim to reduce these pressures by using different methods of insertion and venting. The present investigation was undertaken to...
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：:To determine the vascular architecture of nontraumatic avascular necrosis of the femoral head (ANFH), 38 femoral heads procured from 31 ANFH patients were studied by microangiographic and histologic methods. Microangiography showed that the head was consistently stratified into three zones: the normal vascular, the re...
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：:Regional osteopenia may persist after certain types of fractures. To investigate the practical importance of this observation, the authors studied 2744 past fractures in 1659 patients with present fractures. Radial fractures rarely occurred ipsilateral to previous radial fractures, whereas fractures of the hand were m...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1989-03-01 00:00:00
abstract：:Electron microscopic evaluation was investigated in surgical specimens of interdigital neuroma. Edema of the endoneureum, fibrosis beneath the perineurium, axonal degeneration and necrosis suggest nerve damage occurs secondary to mechanical impingement in the etiology of interdigital neuroma. ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1991-10-01 00:00:00
abstract：:Contemporary knee designs differ considerably in the conformity that exists between the articulating surfaces of the femoral and tibial components. The thickness of the polyethylene components also varies from design to design. Conformity and thickness affect the stresses associated with surface damage and the subsequ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1995-08-01 00:00:00
abstract：:Hip arthroscopy has obvious advantages over arthrotomy in the pediatric population. Hip arthroscopy, used as a diagnostic or therapeutic tool, is significantly less invasive than arthrotomy and allows for quicker recovery and return to activities. In addition, arthroscopy avoids dislocation of the femoral head and the...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：10.1097/01.blo.0000043044.84315.90
更新日期：2003-01-01 00:00:00
abstract：BACKGROUND:Serum C-reactive protein (CRP) is a general marker of inflammation, and recent studies suggest that measurement of CRP in synovial fluid may be a more accurate method for diagnosing periprosthetic joint infection (PJI). QUESTIONS/PURPOSES:We aimed to (1) determine if there is a correlation between serum and...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-014-3828-y
更新日期：2014-12-01 00:00:00
abstract：:In accepting this invitation to write a prefatory chapter as a mini professional autobiography, it has become all too obvious that this has touched a few nerve endings that had healed many years ago. Contemplating personal experiences, thoughts, and philosophies and then writing them should have a purpose. During thes...
journal_title：Clinical orthopaedics and related research
pub_type： 传,历史文章,杂志文章
doi：
更新日期：1994-03-01 00:00:00
abstract：:An aggressive and recurrent pigmented villonodular synovitis of the knee occurred in a 47-year-old man. Magnetic resonance imaging was an excellent noninvasive diagnostic aid that completely outlined the extent of the synovitis and correlated well with surgical findings. ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1988-11-01 00:00:00
abstract：:We surveyed orthopaedic surgery residents and faculty from two university training programs to quantify quality of life measures including burnout, general health, and relationship issues. Residents exhibited high levels of burnout and emotional exhaustion but only average levels of personal achievement, while faculty...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/01.blo.0000224030.78108.58
更新日期：2006-08-01 00:00:00
abstract：:To analyze the influence of varying viscosity and mixing temperature (22 degrees C and 6 degrees C) on macro- and microporosity, density, and compressive strength in vacuum mixed bone cement, high, medium, and low viscosity cement were mixed in 2 vacuum mixing systems and compared with bowl mixing at atmospheric press...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1997-01-01 00:00:00
abstract：BACKGROUND:The indication for hip arthrotomy accompanied by intraarticular work during periacetabular osteotomy (PAO) has not been precisely defined. To validate a role for routine hip arthrotomy accompanied by intraarticular work, frequent intraarticular pathology must exist, and the adjunct procedures must not be ass...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-012-2602-2
更新日期：2013-02-01 00:00:00
abstract：BACKGROUND:Pelvic and retroperitoneal trauma is a major cause of morbidity and mortality in multiply injured patients. The Injury Severity Score (ISS) has been criticized for underrepresenting and inaccurately defining mechanical injury. The influence of pelvic injury volume on organ dysfunction and multiple organ fail...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-015-4676-0
更新日期：2016-06-01 00:00:00
abstract：:Patients who are young or active or both who require total joint replacement pose a unique challenge; their high activity demands wear-resistant bearings that will perform for decades, without suffering from the adverse effects of accumulated wear products. We discuss the tribologic and biologic properties of newly in...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：10.1097/00003086-200401000-00017
更新日期：2004-01-01 00:00:00
abstract：:Adhesive capsulitis occurs as a pathologic entity in the shoulder, hip, and ankle joints. Thickening and contracture of the wrist joint capsule were demonstrated on arthrograms performed on ten patients ranging in age from 20 to 82 years. The patients had pain and limited range of motion in the wrist. The findings inc...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1988-09-01 00:00:00
abstract：:The choice of pin site in shoulder arthrodesis after brachial plexus injury is important for efficient external fixation. The pins are inserted into the coracoid process from the anterior aspect and the scapular spine from the acromion. This insertion method holds the scapula more rigid and allows the patient to lie s...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1989-10-01 00:00:00
abstract：BACKGROUND:Surgeons perform THA to address a variety of conditions in younger patients, including osteoarthritis (OA), osteonecrosis, inflammatory arthritis, and congenital deformities. Younger patients aged 50 years or younger have been characterized as active in the literature, but a direct relationship between age a...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-014-3952-8
更新日期：2015-03-01 00:00:00
abstract：:Rupture of the peroneus longus tendon with an associated fracture of the os peroneum is an uncommon injury, which may present as chronic lateral ankle instability. There have been only seven cases documented in the literature since 1966. A case of chronic peroneus longus tendon rupture with os peroneum fracture is pre...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：10.1097/00003086-199908000-00021
更新日期：1999-08-01 00:00:00
