Abstract:
OBJECTIVE:To determine the relative amount of fixation of self-reinforced poly-L-lactide (SR-PLLA) rods and Kirschner wires in bovine cancellous bone by comparing their pullout strength DESIGN:An in vitro laboratory study was performed using bovine femurs. Ten two-millimeter-diameter pins of each type were inserted into cancellous bone and then pulled out, using a material testing machine. The maximum force (pullout strength) was selected over other measurements to compare the amount of fixation of the two types of pins. All of the pins were retrieved for microscopic analysis. A paired t test was performed to analyze the differences between the pullout strength of the two types of pins. SETTING:Orthopaedic Bioengineering Laboratory, University of Louisville School of Medicine, Louisville, Kentucky, U.S.A. SPECIMENS:Two young fresh bovine distal femurs, ten two-millimeter-diameter Kirschner wires, ten two-millimeter-diameter bioabsorbable SR-PLLA rods MAIN OUTCOME MEASUREMENTS:Pullout strength in Newtons, and microscopic pin surface aspect after insertion. RESULTS:Significant differences were noted between the maximum force required to remove the two types of pins (p < 0.01) The K-wire mean pullout force was 37.7 N (SD 13.6), and the SR-PLLA rod mean pullout force was 53.6 N (SD 19.3). Microscopic analysis indicated surface modification only on the SR PLLA rods. DISCUSSION:SR-PLLA composites have shown comparable clinical results to their metallic counterparts. In this study, the pullout strength of SR-PLLA rods was compared with that of conventional K-wires. A significant difference (p < 0.01) favoring bioabsorbable pullout strength was noted. The bioabsorbable pin surface modification during insertion is an interesting finding that warrants further investigation as a potential source of improved fixation. CONCLUSION:SR-PLLA rods retain their hold in bovine cancellous bone better than K-wires. This finding offers to the orthopaedic surgeon more information about new pin fixation methods.
journal_name
J Orthop Traumajournal_title
Journal of orthopaedic traumaauthors
Rubel IF,Seligson D,Lai JL,Voor MJ,Wang Mdoi
10.1097/00005131-200108000-00008subject
Has Abstractpub_date
2001-08-01 00:00:00pages
429-32issue
6eissn
0890-5339issn
1531-2291journal_volume
15pub_type
杂志文章abstract::Unstable pelvic ring injuries are associated with an increased mortality rate, most commonly from severe hemorrhage. Circumferential pelvic antishock sheeting has proven effective for rapidly stabilizing the pelvic ring and has become an integral part of resuscitation protocols. Acute antishock sheet placement frequen...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0b013e3181a87c6c
更新日期:2009-10-01 00:00:00
abstract::Fifteen patients with fractures of the extremities and associated arterial injuries treated from 1976 to 1987 were retrospectively analyzed. Complete ischemia was present in only two cases; in four cases with partial ischemia, the vascular injury presented late after 12 h-14 days. All limbs could be preserved, but com...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-199103000-00005
更新日期:1991-01-01 00:00:00
abstract:OBJECTIVE:Syndesmotic instability may coexist with unstable Weber B supination-external rotation (SE) lateral malleolar fractures. Current recommendations suggest that Weber B injuries should not have associated syndesmotic instability after open reduction and internal fixation of the lateral malleolus. The purpose of ...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0b013e318157a63a
更新日期:2007-10-01 00:00:00
abstract:OBJECTIVES:To assess mechanism of injury as a clinical course predictor in patients with complete anterior and posterior pelvic ring disruptions [innominosacral dissociation (ISD)]. DESIGN:Retrospective review of radiographs and medical data. SETTING:R Adams Cowley Shock Trauma Center, Baltimore, Maryland, statewide ...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-199702000-00002
更新日期:1997-02-01 00:00:00
abstract::The fracture classification systems currently used most frequently were not developed or validated by rigorous scientific evaluation methods. This paper discusses the classification of fractures from an epidemiological and clinical decision-making perspective and proposes a standardized methodological concept for thei...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章,评审
doi:10.1097/01.bot.0000155310.04886.37
更新日期:2005-07-01 00:00:00
abstract:OBJECTIVE:To determine the effectiveness of exchange reamed nails for treatment of aseptic femoral delayed unions and nonunions. DESIGN:Retrospective chart review. PATIENTS:Nineteen patients admitted to the Carolinas Medical Center Level I trauma center from 1990 to 1996 for repair of femoral shaft fracture nonunion ...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-200006000-00005
更新日期:2000-06-01 00:00:00
abstract:PURPOSE:The purpose of this video is to demonstrate the surgical technique of a shoulder arthrodesis for a patient with multidirectional instability and multiple failed previous surgeries. METHODS:A 25-year-old woman with a long history of left shoulder multidirectional instability in the setting of Ehlers-Danlos synd...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000001212
更新日期:2018-08-01 00:00:00
abstract::A case of a complex distal humeral fracture is presented. The patient lacked sufficient bony architecture to allow for conventional reconstruction. A technique is described using an intramedullary plate to obtain bony stabilization and permit early range of motion exercises. ...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-200205000-00011
更新日期:2002-05-01 00:00:00
abstract:OBJECTIVES:To evaluate use of intraoperative fluoroscopy during acetabular surgery to determine fracture reduction and accurate placement of screws. DESIGN:Retrospective. SETTING:Level I trauma center. PARTICIPANTS:Thirty patients with thirty-two acetabular fractures. INTERVENTION:Patients were evaluated with fluor...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-199908000-00004
更新日期:1999-08-01 00:00:00
abstract:OBJECTIVES:We studied the safety of immediate weight bearing as tolerated (IWBAT) and immediate range of motion (IROM) following open reduction internal fixation (ORIF) of selected malleolar ankle fractures (defined as involving bony or ligamentous disruption of two or more of the malleoli or syndesmosis without articu...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000002003
更新日期:2020-11-09 00:00:00
abstract:OBJECTIVES:To investigate the incidence of concomitant posterior malleolar fractures (PMFs) in operative, distal-third, spiral tibia fractures. DESIGN:Prospective protocol with retrospective review of data. SETTING:Single, Level 1 trauma center. PATIENTS/PARTICIPANTS:One hundred ninety-three consecutive, skeletally ...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000001307
更新日期:2018-11-01 00:00:00
abstract::The indications for surgical stabilization of a pediatric diaphyseal femur fracture are expanding. Children with multiple system injuries, a head injury, and/or multiple fractures have fewer local and distant complications if the femur fracture is treated operatively. Other indications include a pathological fracture ...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-199212000-00011
更新日期:1992-01-01 00:00:00
abstract::Successful operative intervention in displaced intra-articular calcaneal fractures depends in part on the maintenance of an anatomic reduction of the posterior facet. This guide describes our use of bioabsorbable implants to solve this problem. ...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0b013e3181ca38ce
更新日期:2010-12-01 00:00:00
abstract::A unique case of an irreducible fracture dislocation of the knee is reported. A review of the literature revealed no previously reported cases of fracture dislocation of the distal femur not amenable to closed reduction. ...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章,评审
doi:10.1097/00005131-199607000-00013
更新日期:1996-01-01 00:00:00
abstract:OBJECTIVE:To determine whether using nothing stronger than codeine and tramadol provides adequate pain alleviation in people recovering from fixation of a fracture of the femur or tibia shaft. DESIGN:Retrospective case series. SETTING:Level 1 trauma center in the United States. PATIENTS:All adult patients from Octob...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000001683
更新日期:2020-02-01 00:00:00
abstract:OBJECTIVES:A sheep model of osteoporosis suitable for implant testing for osteoporotic fractures was evaluated with regard to normalization of hormonal status and possible rebound of bone mineral density subsequent to the termination of steroid application. DESIGN:Osteoporosis was induced in 10 aged, female white alpi...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-200501000-00005
更新日期:2005-01-01 00:00:00
abstract:BACKGROUND:Hip fractures are associated with significant morbidity and mortality. Co-management models pairing orthopaedic surgeons with hospitalists or geriatricians may be effective at improving processes of care and outcomes such as length of stay (LOS) and cost. We set out to determine the effect of an integrated h...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000000691
更新日期:2016-12-01 00:00:00
abstract:OBJECTIVE:To test the hypothesis that oblique screws at the ends of a plate provide increased strength of fixation as compared to standard screw insertion. DESIGN:Biomechanical laboratory study in synthetic bone test medium. METHODS:Narrow 4.5-mm stainless steel low-contoured dynamic compression plates were anchored ...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-200410000-00006
更新日期:2004-10-01 00:00:00
abstract:OBJECTIVE:To describe medical care and surgical outcome after functional reconstructive surgery in late-presenting patients who already had at least one prior operation. DESIGN:Retrospective review of medical care and surgical outcome from August 2006 to December 2008 using patient records for initial data with active...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0b013e318225e8d0
更新日期:2012-07-01 00:00:00
abstract:OBJECTIVE:A new device for the treatment of intertrochanteric fractures that uses 2 cephalocervical screws in an integrated mechanism allowing linear intraoperative compression and rotational stability of the head/neck fragment has been developed. The aim of this study was to describe the results using this device for ...
journal_title:Journal of orthopaedic trauma
pub_type: 临床试验,杂志文章
doi:10.1097/BOT.0b013e31819211b2
更新日期:2009-01-01 00:00:00
abstract:OBJECTIVES:To evaluate the use of lag screw only fixation of noncomminuted oblique fractures of the lateral malleolus in patients younger than fifty years of age. DESIGN:Prospective evaluation. SETTING:Level I trauma center. PATIENTS AND PARTICIPANTS:Forty-seven ankle fractures with simple oblique patterns and no co...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-200102000-00008
更新日期:2001-02-01 00:00:00
abstract::Not all fractures heal well or rapidly in the adult skeleton, and basic scientists and clinicians continue to search for ways to make fractures heal more predictably. It is a fundamental tenet of orthopaedics that skeletal injury is followed by inflammation and that this inflammatory response is the first stage in a s...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章,评审
doi:10.1097/BOT.0b013e3181f17b33
更新日期:2010-09-01 00:00:00
abstract:OBJECTIVE:To evaluate objectively the effectiveness of current surgical management of displaced acetabular fractures. To provide insight into how these evaluation methods can be used to identify areas in which improvements in surgery and rehabilitation can be pursued to improve patient outcomes. DESIGN:Consecutive cas...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-200202000-00001
更新日期:2002-02-01 00:00:00
abstract:BACKGROUND:Traumatic spondylolisthesis of the axis, is a common cervical spine fracture; however, to date there is limited data available to guide the treatment of these injuries. The purpose of this review is to provide an evidence-based analysis of the literature and clinical outcomes associated with the surgical and...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章,评审
doi:10.1097/BOT.0000000000000952
更新日期:2017-09-01 00:00:00
abstract:OBJECTIVES:To report the safety and clinical outcomes of placing current magnetic resonance imaging (MRI) components inside and outside the MRI bore during MRIs. DESIGN:Retrospective case series. SETTING:Four trauma centers (3 Level I and 1 Level II), from January 2005 to January 2015. PATIENTS:All patients who had ...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章,多中心研究
doi:10.1097/BOT.0000000000000954
更新日期:2017-11-01 00:00:00
abstract::Many of the current techniques of internal fixation of proximal humerus fractures use tension band wires to achieve secure fixation, allowing immediate postoperative exercise of the affected limb. In addition, the use of a cancellous lag screw placed from the humeral shaft into the humeral head may have several advant...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-199402000-00006
更新日期:1994-01-01 00:00:00
abstract::The distribution of clindamycin in tibial cortical bone, administered via direct local infusion with an implantable pump, is described. Clindamycin concentrations in cortical bone were measured after 3, 7, and 21 days of intraosseous infusion. The tibia were divided into four quadrants relative to the outflow infusion...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-199410000-00003
更新日期:1994-10-01 00:00:00
abstract::Femoral shaft fractures are commonly treated with closed reduction and reamed intramedullary nailing. However, some reductions are difficult to obtain or maintain, especially in muscular or large patients. When closed methods fail to achieve reduction, percutaneous techniques are extremely useful. In addition, the use...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000000890
更新日期:2017-08-01 00:00:00
abstract::Transverse fractures at the distal tip of a well-fixed femoral prosthesis are difficult to stabilize using plates and screws due to the presence of the underlying intramedullary stem. The attachment of plates using cerclage wires obviates the need for screws, but the stability provided by cerclage plating is a clinica...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-199505000-00004
更新日期:1995-01-01 00:00:00
abstract:OBJECTIVE:To observe and report the clinical results of indirect plating techniques in the treatment of femoral shaft nonunions originally treated with intramedullary nailing. DESIGN:Prospective consecutive. SETTING:Regional trauma center. PATIENTS:A consecutive series of twenty-three patients with nonunion of femor...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-200105000-00004
更新日期:2001-05-01 00:00:00