Abstract：
:The purpose of this study was to examine the mating surfaces of femoral heads and stems for evidence of corrosion, and to evaluate the quality of the taper lock of modular hip prostheses. Forty-eight implants with three different designs were evaluated. Group I (26 implants) had a cobalt alloy head and cobalt alloy stem. Group II (ten implants) had a cobalt alloy head and a titanium stem. Group III (12 implants) had a cobalt alloy head with a titanium stem that was coupled in the factory via a shrink fit. The implants were examined under light microscopy and scanning electron microscopy. In cases where the femoral head was still assembled to the stem, pull-off testing was performed using an MTS machine. The average failure load for the pull-off tests for each group of prostheses was as follows: Group I (nine implants) 3,003 N +/- 623 N; Group II (six implants) 4453 N +/- 570 N; and Group III (12 implants) 6859 N +/- 3525 N. The Group III implants required a significantly greater pull-off force than those in Group I (p = 0.002). There was no evidence of corrosion in Group I. In Group II, crevice corrosion was noted in one taper interface and there was fretting in two other tapers. No corrosion was noted in Group III. Improving the tolerances of the mating surfaces may be a key factor in preventing corrosion. This would not only increase the forces that are necessary to debond the matting surfaces, but also decrease corrosion by reducing micromotion and fluid at the taper interface.
journal_name
Clin Orthop Relat Resjournal_title
Clinical orthopaedics and related researchauthors
Lieberman JR,Rimnac CM,Garvin KL,Klein RW,Salvati EAsubject
Has Abstractpub_date
1994-03-01 00:00:00pages
162-7issue
300eissn
0009-921Xissn
1528-1132pub_type
杂志文章abstract：:The oncologic outcome in the treatment of pelvic sarcomas is not comparable with that in the extremity. Particular problems arise when the tumor involves the posterior pelvis and the sacrum or even the lower lumbar spine. Because of the difficulty in achieving local control and the major functional deficits after exte...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-200204000-00003
更新日期：2002-04-01 00:00:00
abstract：:Intracapsular fractures of the hip have been classified by different authors with a basis on various concepts. Pauwels classified these fractures according to the angle of inclination; Linton used trabecular disposition among the fractural fragments, and Garden described four types according to the order of displaceme...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：10.1097/00003086-200206000-00004
更新日期：2002-06-01 00:00:00
abstract：:Varus derotational osteotomy of the femur is designed to correct coxa valga and femoral anteversion which contribute to progressive hip subluxation and dislocation in certain cases of cerebral palsy. By the application of a careful preoperative evaluation, vigorous postoperative rehabilitation and treatment of complic...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1977-06-01 00:00:00
abstract：:Osteopetrosis is a metabolic bone disease characterized by a systemic increase in skeletal mass. It results from a defect in the production or function of osteoclasts and is inherited in nine genetically distinct osteopetrotic animal mutations and man. Studies of these mutations have revealed that osteopetrosis is a c...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：
更新日期：1993-09-01 00:00:00
abstract：:The current study was done to assess the oncologic outcomes after inadvertent intraoperative contamination in the treatment of musculoskeletal sarcomas, to determine the prognostic significance of these events. Forty-three patients with malignant lesions and either positive margins or intraoperative tumor penetration ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-200204000-00013
更新日期：2002-04-01 00:00:00
abstract：BACKGROUND:Minimally invasive surgery (MIS) approaches have the potential to reduce procedure-related morbidity when compared with traditional approaches. However, the magnitude of radiographic correction and degree of clinical improvement with MIS techniques for adult spinal deformity remain undefined. QUESTION/PURPO...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：10.1007/s11999-013-3441-5
更新日期：2014-06-01 00:00:00
abstract：BACKGROUND:The most important objective of clinical classifications of slipped capital femoral epiphysis (SCFE) is to identify hips associated with a high risk of avascular necrosis (AVN)--so-called unstable or acute slips; however, closed surgery makes confirmation of physeal stability difficult. Performing the capita...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-012-2339-y
更新日期：2012-08-01 00:00:00
abstract：:Reconstruction of massive proximal tibial defects caused by failed cemented total knee arthroplasty (TKA) was evaluated using cancellous allograft and a rigidly fixed tibial component. Twenty patients with massive tibial defects requiring revision TKA were operated on using this technique from December 1984 to Decembe...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1989-11-01 00:00:00
abstract：:In situ hybridization and ultrastructural immunohistochemistry were used to study the synthesis and distribution of 2 bone matrix proteins, bone sialoprotein and osteopontin, in the proximal tibial epiphysis in 21-, 32-, and 84-day-old rats. Bone sialoprotein messenger ribonucleic acid expression was restricted to cel...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-199609000-00033
更新日期：1996-09-01 00:00:00
abstract：:Eleven patients had either repair (two) or nerve graft reconstruction (nine) of the common peroneal nerve or its superficial or deep divisions about the knee. The average follow-up period was 29.1 months. A good or excellent result was achieved in six (54.5%) patients. The results appeared best when direct nerve repai...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1991-06-01 00:00:00
abstract：:Although femoral shaft fractures constitute fewer than 2% of all fractures in children and adolescents, their treatment has produced many pieces of literature and years of controversy. Prevailing opinion has favored nonoperative and operative treatment, and a variety of techniques have been advocated to avoid complica...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：10.1097/01.blo.0000163463.05141.1c
更新日期：2005-05-01 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：:The interpretation of loosening on the basis of contrast flow about the cement-bone interface in arthrograms of total knee arthroplasties includes special considerations. The first is that arthrography is misleading in the presence of severe cystic changes. The second is that clinical criteria should be given priority...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1981-10-01 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：:Low fibular fractures that were associated with deltoid ligament disruption and inferior tibiofibular syndesmotic disruption were studied. All of the patients had a Type B Weber fibular fracture associated with a deltoid ligament injury. It was difficult to detect the syndesmosis disruption on the initial assessment o...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/01.blo.0000052935.71325.30
更新日期：2003-04-01 00:00:00
abstract：:Both primary repair and late substitution of anterior cruciate ligaments can be accomplished by intra-articular methods. This principle is to provide temporary struts that are initially avascular but can later undergo revascularization and metaplasia to form a new ligament. The graft does afford initial support, howev...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1979-09-01 00:00:00
abstract：UNLABELLED:Flexion instability after cruciate-retaining total knee arthroplasty has been well documented. We identified an analogous patient group with symptomatic flexion instability without dislocation after primary posterior stabilized total knee arthroplasty. We sought to determine the typical symptoms and exam fin...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-200511000-00018
更新日期：2005-11-01 00:00:00
abstract：:We report the case of an infected nonunion of the proximal femoral in an elderly patient. There was extensive involvement of the entire proximal femur precluding salvage. An impromptu use of a cephalomedullary nail coated with antibiotic-laden bone cement is described, followed by reimplantation with a revision-type p...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/01.blo.0000238779.12069.e1
更新日期：2007-01-01 00:00:00
abstract：:Seven patients with chronic osteomyelitis were treated by surgical debridement. Cefamandole was administered intravenously before surgery. During the debridement, cefamandole concentrations were measured in serum and necrotic bone. Although adequate levels of antibiotic were achieved in the serum, minimal or no concen...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1985-10-01 00:00:00
abstract：BACKGROUND:Approximately one-third of reduced pediatric distal radius fractures redisplace, resulting in further treatment. Two major modifiable risk factors for loss of reduction are reduction adequacy and cast quality. Closed reduction and immobilization of distal radius fractures is an Accreditation Council for Grad...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-017-5336-3
更新日期：2017-09-01 00:00:00
abstract：:One hundred eight patients with low-grade soft tissue sarcoma treated at the authors' institution from 1984 to 1999 were reviewed retrospectively. Low-grade sarcomas were defined as those designated as Grade I of III or Grade I or II of IV. Patients who presented with recurrent tumors or who had multiple procedures at...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-200204000-00023
更新日期：2002-04-01 00:00:00
abstract：:Autogenous implantation of nucleus pulposus or nucleus pulposus cells that were activated by coculture retards intervertebral disc degeneration, but harvesting such grafts causes disc degeneration at the donor site. This study examined whether nucleus pulposus allografts similarly retard disc degeneration and whether ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-200108000-00015
更新日期：2001-08-01 00:00:00
abstract：:Interposition grafting material is used frequently to treat osteoarthritis of the base of the thumb or tendinous and ligamentous injuries of the hand. The observation of duplicated tendons in the first dorsal compartment of the hand prompted us to explore the possibility of using the accessory abductor pollicis longus...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-009-1059-4
更新日期：2010-05-01 00:00:00
abstract：:A case of avulsion fracture of the lateral sesamoid is reported in association with dislocation of themetatarsophalangeal joint of the hallux. The radiographic criteria to establish the diagnosis of fracture in sesamoid bones are outlined. Review of the literature reveals only one other reported case associated with a...
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：:The goal of this study is to examine whether porcine small intestine submucosa (SIS) exhibits antimicrobial properties in a standard in vitro system, without pretreatment with acetic acid or extraction of soluble proteins. Previous animal studies suggest that porcine SIS may have inherent antibiotic properties. Using ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/01.blo.0000143573.03645.b4
更新日期：2004-10-01 00:00:00
abstract：UNLABELLED:Acetabular retroversion (AR) alters load distribution across the hip and is more prevalent in pathologic conditions involving the hip. We hypothesized the abnormal orientation and mechanical changes may predispose certain individuals to stress injuries of the femoral neck. We retrospectively reviewed the ant...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-009-0969-5
更新日期：2010-03-01 00:00:00
abstract：:A review of clinical records and radiographs revealed that five of 10 patients with conjoined twinning (three of six ischiopagus and two of two pyopagus twins) had congenital vertebral anomalies including hemivertebrae (3), multiple thoracic anomalies (1), right hemisacral agenesis (1), and three lumbar vertebra (1). ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-200012000-00017
更新日期：2000-12-01 00:00:00
abstract：:The Ilizarov external fixator exhibits more isotropic mechanical properties in bending and nonlinear axial stiffness than do unilateral and bilateral external fixators. Each frame element--wire size, tension, and orientation, as well as ring type--contributes to overall frame rigidity and stability. These factors and ...
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：:Forty-six patients with 48 operatively fixed unstable posterior pelvic ring disruptions were observed for an average of 44 months. Two thirds of the patients returned to their original jobs and 16% changed jobs because of an associated injury. Sixty-three percent of the patients had no pain or pain only on strenuous a...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-199608000-00022
更新日期：1996-08-01 00:00:00
abstract：:Ninety-two patients with IIB osteosarcoma of the extremities were treated with intraarterial (IA) cisplatinum (CDDP) followed by surgery [amputation (61.6%) or resection with endoprosthesis (38.4%)]. Postoperative chemotherapy alternating adriamycin and CDDP was used. The total three-year survival was 62.1%, and the d...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1991-09-01 00:00:00
