Abstract：
:A new spinal implant has been designed and biomechanical testing completed, intended for application to "short-segment" spinal defects such as disc degeneration, fracture, spondylolisthesis, or tumor. Major improvements over currently available devices include: only 2-3 vertebrae are spanned, not 5-7 as with Harrington rods; true three-dimensional fixation is achieved, preventing such problems as hook or rod dislocation; three-dimensional adjustment is easily accomplished, allowing fracture or spondylolisthesis reduction to be readily performed; attachment to vertebrae is by means of transpedicular screws eliminating deliberate encroachment into the spinal canal, such as Luque wires or Harrington hooks; no special alignment between screws is needed (such as with holes or slots in a plate), allowing screw placement to fully conform to anatomic structures; and laminectomy sites and lumbosacral junction are readily instrumented. Background investigations presented here for design of this device include: CT-defined pedicle morphometry showing that screws may be larger than those currently used; effect of pitch, minor diameter, and tooth profile on screw pull-out strength; mechanical testing of a compact, three-dimensionally adjustable, strong, nonloosening articulating clamp; and establishing of the relationship between depth of penetration and strength of fixation of transpeduncular screws.
journal_name
Clin Orthop Relat Resjournal_title
Clinical orthopaedics and related researchauthors
Krag MH,Beynnon BD,Pope MH,Frymoyer JW,Haugh LD,Weaver DLsubject
Has Abstractpub_date
1986-02-01 00:00:00pages
75-98issue
203eissn
0009-921Xissn
1528-1132pub_type
杂志文章abstract：BACKGROUND:Cartilage defects are created on intraarticular osteochondral fragments at the entrance holes of fixation devices when these fragments are fixed to the original sites. Conventional fixation devices hinder repair of these defects and there is a latent risk of secondary osteoarthritis. We therefore developed a...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-011-2175-5
更新日期：2012-07-01 00:00:00
abstract：:Comprehension of the hypermobile flatfoot deformity depends on an understanding of the three structural deformities of the foot associated with the condition: (1) abduction of the forefoot relative to the weight-bearing line; (2) supination of the forefoot; and (3) heel valgus. Evaluation of the hypermobile flatfoot d...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1983-12-01 00:00:00
abstract：:Percutaneous pelvic fixation is possible because intraoperative fluoroscopic imaging and other technologies have been refined. Anterior and posterior unstable pelvic ring disruptions are amenable to percutaneous fixation after closed manipulation or open reduction. Stable and safe fixation is achieved only after an ac...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：10.1097/00003086-200006000-00004
更新日期：2000-06-01 00:00:00
abstract：BACKGROUND:Primary tumor growth during neoadjuvant chemotherapy is believed to be a sign of resistance to chemotherapy (chemoresistance), and often is associated with poor histologic response, local recurrence, and poorer survival. Currently there are no proven indicators to predict poor response to chemotherapy at the...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-014-3521-1
更新日期：2014-06-01 00:00:00
abstract：BACKGROUND:Cost-effectiveness research is an increasingly used tool in evaluating treatments in orthopaedic surgery. Without high-quality primary-source data, the results of a cost-effectiveness study are either unreliable or heavily dependent on sensitivity analyses of the findings from the source studies. However, to...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-015-4369-8
更新日期：2015-10-01 00:00:00
abstract：:Loading of the lunate in patients with Kienböck's disease and a negative ulnar variance provide the rationale for a radial shortening osteotomy. This osteotomy decreases forces transmitted from the radius to the lunate. We retrospectively reviewed 12 patients with Kienböck's disease who had 13 radial shortening osteot...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/BLO.0b013e318041d309
更新日期：2007-07-01 00:00:00
abstract：:Mature female rhesus monkeys were used to evaluate the effects of a one-year course of tetracycline (50 mg/kg/day, intramuscularly) on the formation, maturation, and mineralization of mandibular bone. The bones from the treated group contained normal concentrations of calcium (Ca), inorganic phosphorus (Pi), and hydro...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1983-11-01 00:00:00
abstract：:The authors reviewed the medical records of 53 patients with a lower cervical spine injury who were treated by anterior decompression, bone grafting, and instrumentation using an anterior cervical spine plate and screws. The average age of the patients was 36 years and the mean followup was 58 months. Twenty-six patie...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/01.blo.0000068185.83581.cf
更新日期：2003-06-01 00:00:00
abstract：:A bolt-plate device for fixation of distal thoracic and proximal lumbar vertebral bodies has proved effective in a variety of surgical situations. The instrumentation is designed to obtain the optimum conditions for the healing of cancellous bone, namely, rigid immobilization and, if possible, close apposition of surf...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1986-02-01 00:00:00
abstract：:In this study, the authors investigated enhancing the results of autoclaved autograft bone by combining it with a vascularized bone graft and supplementing it with autogenous bone marrow for replacement of a 2-cm tibial defect in the rabbit model. The study was divided into 4 groups. Group I consisted of autoclaved au...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1995-11-01 00:00:00
abstract：:The combination of traumatic hip dislocation and multiple trauma have not been well documented in the medical literature to date. The role of surgery therefore has not been well defined in these patients. During a 12-year period, 29 consecutive patients with 31 traumatic hip dislocations with concomitant Injury Severi...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-200008000-00014
更新日期：2000-08-01 00:00:00
abstract：BACKGROUND:MicroRNAs are small, noncoding RNAs that regulate the expression of posttranslational genes. The presence of some specific microRNAs has been associated with increased risk of both local recurrence and metastasis and worse survival in patients with osteosarcoma. Pathologic fractures in osteosarcoma are consi...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/CORR.0000000000000867
更新日期：2019-09-01 00:00:00
abstract：:Orthopaedic surgery represents a specialty in which applicants are abundant, residency slots are limited, and all candidates presumably are qualified. Orthopaedic residency programs have members of the resident selection committee review medical school performance measures for the purpose of screening candidates to in...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：
更新日期：1999-05-01 00:00:00
abstract：:A proprioception measurement system was designed and constructed to evaluate lower-limb knee joint proprioception in ten above-knee amputees. The system permitted the testing of subjects in a position simulating late swing phase of gait. The threshold for detection of slow passive motion and the ability to reproduce s...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1992-11-01 00:00:00
abstract：:This report is a prospective review of 450 low-friction arthroplasties (LFAs) performed by a single surgeon from 1972 to 1983 in a community hospital. The clinical results show sustained quality of the result over a maximum follow-up period of 11 years. The radiologic review shows a slight increase in the number and s...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1986-10-01 00:00:00
abstract：BACKGROUND:Although some clinical reports suggest patient-specific instrumentation in TKA may improve alignment, reduce surgical time, and lower hospital costs, it is unknown whether it improves pain- and function-related outcomes and gait. QUESTIONS/PURPOSES:We hypothesized that TKA performed with patient-specific in...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,随机对照试验
doi：10.1007/s11999-014-3544-7
更新日期：2014-08-01 00:00:00
abstract：:The effect of immobility on the biomechanical properties of an anterior cruciate bone-ligament-bone unit of rhesus monkey is reported. Wild primates were used and the captivity time was minimized to lessen disuse changes from cage confinement. The ligament-bone specimens were tested in tension to failure under high st...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1977-03-01 00:00:00
abstract：UNLABELLED:Fractures of the distal radius are common injuries. Low-energy or high-energy mechanisms may be involved. Unstable distal radius fractures present a challenge to the treating orthopaedic surgeon. External fixation is a valuable instrument for fracture reduction and stabilization. Limited open incisions, earl...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/01.blo.0000205898.21233.f5
更新日期：2006-04-01 00:00:00
abstract：:The acute flare of joint inflammation in the child with known juvenile rheumatoid arthritis causes concern primarily regarding the need for additional or modified medical treatment. Acute joint inflammation in an otherwise healthy child creates concern regarding the existence of joint infection. In the early phase of ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-200401000-00037
更新日期：2004-01-01 00:00:00
abstract：BACKGROUND:Anterior cruciate ligament (ACL) injures incur over USD 2 billion in annual medical costs and prevention has become a topic of interest in biomechanics. However, literature conflicts persist over how knee rotations contribute to ACL strain and ligament injury. To maximize the efficacy of ACL injury preventio...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-017-5367-9
更新日期：2017-10-01 00:00:00
abstract：BACKGROUND:Bone quality should play an important role in decision-making for orthopaedic treatment options, implant selection, and affect ultimate surgical outcomes. The development of decision-making tools, currently typified by clinical guidelines, is highly dependent on the precise definition of the term(s) and the ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章,评审
doi：10.1007/s11999-011-1838-6
更新日期：2011-08-01 00:00:00
abstract：:The effectiveness of physeal distraction in stimulating bone growth in animals was investigated by force applied to the distal femoral growth plate of immature rabbits. The system was continuously monitored to detect physeal separation. A distraction of 0.25 mm every 12 hours led to physeal separation in five animals....
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：:Thirty-two rabbits were used experimentally to study the effect of cortisone in bone, lungs, kidneys, and liver. Cortisone does induce abnormal increases in the serum cholesterol, fatty metamorphosis of the liver and the fatty emboli of the subchondral vessels of the femoral heads. Clofibrate therapy appeared to modif...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1978-01-01 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：:Proximal tibial osteotomy for degenerative genu varus and valgus has an excellent success rate with proper patient selection and technical proficiency. The following are some infrequently recognized pitfalls. Excessive bone loss prevents two plateau weight-bearing after osteotomy, introduces a "teeter effect," and is ...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1097/00003086-197501000-00034
更新日期：1975-01-01 00:00:00
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 i...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：
更新日期：1994-01-01 00:00:00
abstract：BACKGROUND:Readmissions after total joint arthroplasty have become a key quality measure in elective surgery in the United States. The Affordable Care Act includes the Hospital Readmission Reduction Program, which calls for reduced payments to hospitals with excessive readmissions. This policy uses a method to determin...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-016-5156-x
更新日期：2017-05-01 00:00:00
abstract：:Since the inception of adjuvant chemotherapy for osteogenic sarcoma (OS), 25 patients were treated for telangiectatic osteogenic sarcoma (TOS) from 1973 through 1980. This represented 12% of all patients with primary OS of an extremity seen during this time period. Tumors that demonstrated only focal areas of TOS with...
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：UNLABELLED:THA in young patients is challenging regarding restoration and survival because patients are young, active, and tend to have disturbed anatomy. We asked whether a three-dimensional custom cementless stem could restore hip function, decrease osteolysis and wear, and enhance stem survival in young patients. We...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-009-1045-x
更新日期：2010-03-01 00:00:00
abstract：BACKGROUND:An entrustable professional activity describes a professional task that postgraduate residents must master during their training. The use of simulation to assess performance of entrustable professional activities requires further investigation. QUESTIONS/PURPOSES:(1) Is simulation-based assessment of reside...
journal_title：Clinical orthopaedics and related research
pub_type： 杂志文章
doi：10.1007/s11999-015-4553-x
更新日期：2016-04-01 00:00:00
