Abstract：
:Reduction of the porosity of bone cement by centrifugation significantly improves the fatigue life of the cement when smooth, waisted specimens are tested. However, bone cement in vivo has surface irregularities at the interdigitation of the cement with the trabecular bone. The effect of centrifugation on the fatigue life of Simplex P in specimens containing surface irregularities was investigated by examining both composite specimens of trabecular bone and bone cement and specimens containing a sharp, circumferential notch. For the specimens with the sharp notch, the bone cement that had been centrifuged lasted significantly longer in fatigue (47,039 +/- 40,277 cycles) than the uncentrifuged specimens (3103 +/- 1950 cycles). Eleven of 15 uncentrifuged specimens broke at the location of a void, rather than the notch. In contrast, when the porosity was reduced by centrifugation, 13 of the 15 specimens broke at the notch. For the specimens that were a composite of bone cement and trabecular bone, the centrifuged specimens had a significant increase in fatigue life compared to the uncentrifuged specimens when tested at both 7 MPA (641,056 +/- 444,131 cycles vs. 237,969 +/- 124,153 cycles) and 15 MPA (8800 +/- 4673 cycles vs. 1534 +/- 719 cycles). Reduction of porosity in bone cement by centrifugation significantly extends its fatigue life even in the presence of trabecular bone or sharp surface notches as used in total joint replacements. These data support the concept that reduction of porosity of bone cement by centrifugation may extend the duration of fixation of the components in cemented total joint arthroplasties.
journal_name
Clin Orthop Relat Resjournal_title
Clinical orthopaedics and related researchauthors
Davies JP,O'Connor DO,Burke DW,Jasty M,Harris WHsubject
Has Abstractpub_date
1988-04-01 00:00:00pages
156-61issue
229eissn
0009-921Xissn
1528-1132pub_type
杂志文章abstract：:Neonatal osteomyelitis has been frequently reported, but only rarely as a complication of repeated heel punctures. The need for constant monitoring of premature newborns and those having low birthweight and serious deformities necessitates repeated blood samples, usually obtained by heel puncture. Os calcis osteomyeli...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1981-05-01 00:00:00
abstract：:Habilitation of the upper extremity limb-deficient child is enhanced when the treatment program is based on normal growth and development guidelines. Specific developmental tasks have been identified as key indicators of a child's readiness to benefit from prosthetic fitting, activation of major components, use traini...
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：:The erythrocyte sedimentation rate (ESR) was analyzed in 176 patients treated with cemented total hip arthroplasty (THA) for primary osteoarthritis and correlated with the degree of heterotopic bone formation (HBF) one year after the THA. Ninety patients were treated with indomethacin in the first six postoperative we...
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：1989-11-01 00:00:00
abstract：:A small amount of partially purified, water-soluble murine osteosarcoma-derived bone morphogenetic protein (BMP) was implanted into the dorsal muscles of mice in combination with calf skin gelatin or collagen as carriers. Changes in the ribs adjacent to the implants were then chronologically observed. On implantation ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1989-02-01 00:00:00
abstract：INTRODUCTION:It is unclear which antibiotic regimen provides the best prophylaxis against surgical site infection (SSI) in patients undergoing hip and knee surgery. QUESTIONS/PURPOSES:Therefore, we determined whether dual antibiotic prophylaxis (1) reduced the rate of SSI compared to single antibiotic prophylaxis and ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-012-2255-1
更新日期：2012-10-01 00:00:00
abstract：UNLABELLED:We sought to determine whether open reduction and internal fixation in combination with free vascularized bone grafting and elbow contracture release is an effective treatment for patients with recalcitrant distal humeral nonunions with segmental bone loss. In addition, we wondered whether this treatment str...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：2005-06-01 00:00:00
abstract：:Reasons for reoperation after knee revision surgery are implant loosening, sepsis, extensor mechanism problems, fractures of bone or prosthetic components, wear debris, and limited range of motion. The purpose of this study was to review the complications requiring reoperation in a large number of condylar revision to...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1993-01-01 00:00:00
abstract：:Based on the follow-up evaluation of 350 patients in whom lumbar disc herniation was treated by anterior discectomy and interbody fusion from 1955 to 1982, 94.3% of the patients obtained bony union and justified the principle of interbody stabilization of the spine. The normalization of the myelographic pattern observ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1984-03-01 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：:Localized pigmented villonodular synovitis is a lesion that may affect any joint but is frequently found in the knee. Because of its rarity, diagnostic omissions are common. Definitive treatment usually involves resection of the lesions as well as a synovectomy. Nine patients were treated arthroscopically, thereby avo...
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：BACKGROUND:Although use of nonsteroidal antiinflammatory drugs and low-dose irradiation has demonstrated efficacy in preventing heterotopic ossification (HO) after THA and surgical treatment of acetabular fractures, these modalities have not been assessed after traumatic blast amputations where HO is a common complicat...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/CORR.0000000000000594
更新日期：2019-03-01 00:00:00
abstract：:This is a report of the fifth known case of recurrent Legg--Calve--Perthes' disease. Roentgenograms of the hips after the first avascular episode, at the age of 3 years and 6 months resemble to a certain extent, Dysplasia Epiphysealis Capitis Femoris. ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1977-07-01 00:00:00
abstract：:The Jehovah's Witnesses do not accept allogeneic blood transfusion or certain types of autologous blood transfusion and, therefore, present the orthopaedic surgeon with a challenge in the management of perioperative blood loss. Accepting a patient who is a Jehovah's Witness as a surgical candidate requires the surgeon...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-199912000-00026
更新日期：1999-12-01 00:00:00
abstract：:Ten patients with femoral head fractures were evaluated with conventional hip radiographs, computed axial tomography (CT), and pelvic oblique radiographs. The CT scan was used to determine the plane of the fracture within the femoral head. The patient was then positioned with the fracture line parallel to the radiogra...
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：:Posterior glenoid osteotomy (posterior glenoplasty) is a standard surgical reconstructive operation for recurrent posterior instability of the shoulder. A 34-year-old man was treated by glenoid osteotomy and subsequently developed significant glenohumeral arthritis. Following several surgical procedures, only total sh...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1984-07-01 00:00:00
abstract：:From 1977 to 1982, 13 patients were diagnosed with avascular necrosis of the femoral head. The diagnoses were made with a combination of clinical exams, radiographs, tomograms, and Tc99 bone scans. One hip was classified as Ficat Stage I, 9 as Stage II, and 5 as Stage III. There were 11 male and 2 female patients with...
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：:Observable objects in biology and medicine extend across a range of scale, from individual molecules and cells; through the varieties of tissue and interstitial interfaces; and to complete organs, organ systems, and body parts. These objects include functional attributes of these systems such as biophysical, biomechan...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：
更新日期：2006-01-01 00:00:00
abstract：:From the time of Hippocrates to the beginning of the nineteenth century, fractures of the distal end of the radius were mistaken for dislocations of the wrist. Clinical observations, anatomic dissections, and experiments on cadavers dispelled this error. It was not, however, until after the discovery of roentgenograms...
journal_title：Clinical orthopaedics and related research
pub_type： 传,历史文章,杂志文章
doi：
更新日期：1984-07-01 00:00:00
abstract：:An 11-year-old boy sustained complete brachial artery disruption following closed posterior elbow dislocation. This is the first documentation in the English-language literature of this type of arterial transection following closed elbow dislocation in a child. It is also the first report of surgical repair of the bra...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1984-04-01 00:00:00
abstract：:The current study was designed to compare muscle torques when using the subvastus and parapatellar approaches for unilateral total knee arthroplasty. Twelve female patients had unilateral total knee arthroplasty with the subvastus approach from January 1997 to June 1998. The historic control group consisted of 16 fema...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-200205000-00027
更新日期：2002-05-01 00:00:00
abstract：BACKGROUND:While the primary objective of joint arthroplasty is to improve patient quality of life, pain, and function, younger active patients often demand a return to higher function that includes sporting activity. Knowledge of rates and predictors of return to sports will help inform expectations in patients antici...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-011-2198-y
更新日期：2012-02-01 00:00:00
abstract：:Partial rupture of the distal biceps tendon is a relatively rare event, and various degrees of partial tendon tears have been reported. In the current study four patients with partial atraumatic distal biceps tendon tears (mean age, 59 years; range, 40-82 years) are reported. In all four patients, a common clinical pa...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-200005000-00018
更新日期：2000-05-01 00:00:00
abstract：BACKGROUND:For unicompartmental knee arthroplasty (UKA), abnormal loading on the tibiofemoral joint could exacerbate knee osteoarthritis or implant wear. Joint moments are an indirect measure of such loading. However, little is known about knee moments of patients with UKA, tempering enthusiasm for its use. QUESTIONS/...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-013-3128-y
更新日期：2014-01-01 00:00:00
abstract：:Saos-2 cultured human osteosarcoma cells contain an extractable bone inducing agent that can induce heterotopic bone in the muscle of Nu/Nu mice. A semipurified GuHCl extract of Saos-2 cells also can promote healing and complete bony union in otherwise non-healing surgically induced defects of rat femur. Northern blot...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1995-04-01 00:00:00
abstract：:Patients with Perthes' disease develop a lesion comparable to osteochondritis dissecans (OCD). The frequency of this combination was about 6% of all Perthes' disease patients conservatively treated. In three out of 17 patients reported here, the lesion caused minor symptoms, but was associated with dislocation, loose ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1980-10-01 00:00:00
abstract：:Two sisters exhibit arthrogrypotic changes in the lower extremities associated with a previously undescribed pelvic dysplasia. The pelvic dysplasia is characterized by: severe abnormalities of ossification with markedly widened triradiate cartilages; irregular, notched acetabulae; marked hypoplasia of the ilia; notchi...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1986-06-01 00:00:00
abstract：:Biopsy is an integral part of the overall management of patients with soft-tissue sarcoma. The types of biopsy are fine needle, trocar, open incision or en bloc excision. There are advantages and disadvantages of each. Open biopsy requires strict adherence to a number of surgical principles. Proper execution requires ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：
更新日期：1993-04-01 00:00:00
abstract：:Articular cartilage repair remains a clinical and scientific challenge with increasing interest focused on the transplantation of chondrogenic cells. This study evaluated the repair response during a 1-year period after implantation of allogenic perichondrium cell polylactic acid composite grafts into 3.7 x 5 mm osteo...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-199707000-00029
更新日期：1997-07-01 00:00:00
abstract：BACKGROUND:Septic arthritis is frequently associated with adjacent infections including osteomyelitis and subperiosteal and intramuscular abscesses. While often clinically indiscernible from isolated septic arthritis, the diagnosis of adjacent infections is important in determining the need for additional surgical inte...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999.0000000000000019
更新日期：2018-01-01 00:00:00
abstract：:Six patients with systemic lupus erythematosus and avascular necrosis of the femoral head were treated by total hip arthroplasty (THA). The primary indication for surgery was persistent hip pain despite conservative therapy. Postoperatively, pain was relieved with corresponding improvement in range of motion in all si...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1981-11-01 00:00:00
