Abstract:
OBJECTIVES:External fixator pins are thought to have improved pullout strength if inserted into both cortices and if pilot holes are drilled. We tested these hypotheses and investigated effects of osteoporosis and pin location on pin pullout strength. METHODS:Self-drilling external fixator pins were inserted using 4 techniques: 1) predrilled bicortically inserted, 2) not predrilled bicortically inserted, 3) not predrilled unicortically inserted, and 4) technique 2 with far cortex disengaged to test holding power of near cortex in isolation. Ninety-six samples were tested from four locations in 12 matched pairs of cadaveric femora [6 pairs osteoporotic (T ≤ -2.5), six pairs nonosteoporotic (T > -2.5)]. Pullout force was tested on materials testing system until failure of pin-bone interface. RESULTS:Bicortical pin placement and location within femur had substantial effects on the holding power of the pins. Osteoporosis had statistically significant effect but with smaller effect size (P = 0.05). No significant difference in holding power was observed between predrilling and no predrilling techniques (P = 0.27). We observed only a trend toward "stripping effect" in near cortex with technique 4. Bicortical placement rendered 69% greater holding power than unicortical. Proximal placement rendered 56% greater holding power than distal. Osteoporotic samples had 15% less holding power than nonosteoporotic samples. CONCLUSIONS:Single-cortex pin placement, osteoporotic bone, and more distal pin location decreased pin pullout strength. We did not observe a significant mechanical advantage of predrilling for modern external fixator pins. The near cortex of a pin inserted into 2 cortices without predrilling did not exhibit substantial stripping effect.
journal_name
J Orthop Traumajournal_title
Journal of orthopaedic traumaauthors
Oliphant BW,Kim H,Osgood GM,Golden RD,Hawks MA,Hsieh AH,OʼToole RVdoi
10.1097/BOT.0b013e3182511ed7subject
Has Abstractpub_date
2013-02-01 00:00:00pages
e25-30issue
2eissn
0890-5339issn
1531-2291journal_volume
27pub_type
杂志文章abstract:OBJECTIVES:Evaluate the effect of the COVID-19 pandemic and the "shelter-in-place" order on orthopaedic trauma presenting to a community level II trauma center. It is hypothesized the overall number of orthopaedic trauma encounters (OTE), the number of OTEs related to both high and low severity injuries, as well as the...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000001860
更新日期:2020-06-08 00:00:00
abstract:OBJECTIVE:To evaluate the experience of a single tertiary care teaching hospital with the association between use of bisphosphonates and atypical femoral fractures, and to identify potential risk factors and chronologic incidence. DESIGN:Retrospective review. SETTING:Tertiary-care teaching hospital. PATIENTS:Thirty-...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章,评审
doi:10.1097/BOT.0000000000000539
更新日期:2016-04-01 00:00:00
abstract:OBJECTIVES:The aim of this study was analyze modes of mechanical failure in a consecutive cohort of patients and establish possible risk factors. DESIGN:This was a retrospective cohort study. SETTING:The study was conducted at an academic level-1 trauma center. PATIENTS:Twenty-nine patients (mean age 56 years, range...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0b013e318251930d
更新日期:2013-01-01 00:00:00
abstract:OBJECTIVES:Because locked plates as a neutralization device for lag screw fracture fixation have different biomechanics than that of unlocked plates, we investigated how this would affect lag screw load at the fracture site. The purpose of this study was to assess the load at a fracture site compressed with a lag screw...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0b013e31823b3dd1
更新日期:2012-09-01 00:00:00
abstract::Over the last several decades, interest in global health across all fields of medicine, including orthopaedic surgery, has grown markedly. Cross-national collaborations are an effective means of conducting high-quality clinical research and offer many advantages over single-center investigations. Successful collaborat...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000000466
更新日期:2015-12-01 00:00:00
abstract:OBJECTIVE:To identify the fracture characteristics that can be reliably assessed by analysis of plain radiographs of tibial plateau fractures. DESIGN:Radiographic review study. PARTICIPANTS:Five orthopaedic traumatologists served as observers. INTERVENTION:Observers made assessments based on the radiographs of fifty...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-200008000-00001
更新日期:2000-08-01 00:00:00
abstract:OBJECTIVE:The open reduction and internal fixation of radial shaft fractures and osteotomies with standard 3.5-mm plates can be complicated by tendon irritation, hardware prominence, and fracture through the screw holes. With the advent of locking plate technology, implant companies and some surgeons have recommended e...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0b013e3181f8bf9b
更新日期:2011-06-01 00:00:00
abstract:OBJECTIVES:We developed a protocol to determine the timing of definitive fracture care based on the adequacy of resuscitation. Inception of this project required a multidisciplinary group, including physicians from anesthesiology, general trauma and critical care, neurosurgery, orthopaedic spine, and orthopaedic trauma...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000000383
更新日期:2015-11-01 00:00:00
abstract:BACKGROUND:Although there is general agreement as to the pathophysiology and treatment of compartment syndrome and the importance of intramuscular pressure measurements, there are many methods described to obtain these measurements. Variations in experimental measurements using current electronic monitoring, needle, an...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0b013e31822908cf
更新日期:2012-01-01 00:00:00
abstract::Fifty-eight percent of the total infections in Italy of COVID-19 were found in northern Italy, in particular, Lombardy. From February 21, 2020, to March 23, 2020, 20 patients with a fracture and a diagnosis of COVID-19 were hospitalized. Demographic data, COVID-19 symptoms, laboratory and radiographic examinations, an...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000001905
更新日期:2020-10-01 00:00:00
abstract::A prospective randomized study was set up, comparing a compression hip screw with the Vandeputte (VDP) endoprosthesis treatment for fresh, unstable peritrochanteric fractures, according to the Evans-Jensen and AO systems. Ninety patients, ages > or = 70 years, 47 of whom were treated with a compression hip screw and 4...
journal_title:Journal of orthopaedic trauma
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00005131-199509040-00004
更新日期:1995-01-01 00:00:00
abstract:OBJECTIVES:To quantify the obliquity and dimensions of the upper and second sacral segment iliosacral screw safe zones and to determine the differences between normal and dysmorphic sacral morphology. DESIGN:Retrospective cohort. SETTING:University Level I trauma center. PATIENTS/PARTICIPANTS:Fifty patients with pel...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0b013e3181cf0404
更新日期:2010-10-01 00:00:00
abstract:OBJECTIVE:Ankle fractures are one of the most common operatively treated lower extremity fractures. Several studies indicate that patients often have residual effects after this injury. The purpose of this study is to use the SF-36 questionnaire at two times to assess patients' functional recovery and residual effects ...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-200201000-00007
更新日期:2002-01-01 00:00:00
abstract:OBJECTIVES:To compare the static and dynamic mechanical properties of a modified crossed cannulated screw (CS) configuration, the inverted triangle (IT) cannulated screw configuration, and a compression hip screw (CHS) with derotation screw in Pauwels type III femoral neck fractures. METHODS:Thirty synthetic femora we...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000000836
更新日期:2017-07-01 00:00:00
abstract:OBJECTIVE:To investigate whether a long bone cortex of well-defined thickness can be regenerated by using an anatomically designed membranous resorbable "tube-in-tube" implant and to establish the functions of membranes in the healing of segmental diaphyseal bone defects larger than the "critical size." DESIGN:Bone he...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-199903000-00006
更新日期:1999-03-01 00:00:00
abstract::We reviewed the treatment and results of 22 Bennett's fractures. Of these fractures, treated by closed reduction and plaster immobilization, 20 were available for follow-up. Eighteen patients had a subjectively satisfactory outcome, and seven had a radiographically confirmed arthrosis of the first carpometacarpal join...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-199502000-00004
更新日期:1995-02-01 00:00:00
abstract::Intracapsular femoral neck fractures are common in the elderly population after a simple fall. However, femoral neck fractures in the physiologically young are less common. Regardless, femoral neck fractures can be a source of significant morbidity and mortality if not treated correctly. Multiple management strategies...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000000288
更新日期:2015-04-01 00:00:00
abstract::Fractures of the distal humerus involving the articular surface can be challenging. The complexity of these fracture patterns increases when the distal fracture is associated with a concomitant humeral shaft fracture with significant proximal extension. The combined exposure technique described here allows for consist...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/01.bot.0000245988.23684.79
更新日期:2007-02-01 00:00:00
abstract:OBJECTIVE:To compare the mechanical stability of fixation of an unstable bicondylar tibial plateau fracture with several different fixation techniques in a cadaveric model. DESIGN:Randomized laboratory investigation using a simulated bicondylar tibial plateau fracture with metaphyseal-diaphyseal dissociation. SETTING...
journal_title:Journal of orthopaedic trauma
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00005131-199911000-00005
更新日期:1999-11-01 00:00:00
abstract:SUMMARY:Convergent type radioulnar translocation is an extremely rare form of injury occurring in a growing child. We report a case of convergent radioulnar translocation along with a radial head fracture in a young child. Open reduction of the elbow and internal fixation of the radial head fragment helped in achieving...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章,评审
doi:10.1097/BOT.0b013e31821d7fd5
更新日期:2012-04-01 00:00:00
abstract:OBJECTIVE:Screw fixation of the injured syndesmosis restores stability but may reduce motion. The purpose of this study is to determine whether functional outcomes and radiographic results after ankle fracture are affected by the status of the syndesmosis screw. DESIGN:Retrospective review of a consecutive clinical se...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0b013e3181a9f7a5
更新日期:2010-01-01 00:00:00
abstract:OBJECTIVES:To determine whether uncemented implants would provide similar outcomes while avoiding the complications associated with cement in the treatment of elderly patients with proximal humerus fractures (PHFs) with primary reverse total shoulder arthroplasty (RTSA). DESIGN:Case series. SETTING:A single Level I t...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000001465
更新日期:2019-07-01 00:00:00
abstract::Although there is little doubt that arthroplasty of one form or another is appropriate treatment for many patients with a displaced femoral neck fracture, there is ongoing controversy about the relative merits of different types of arthroplasty among specific groups of patients. In particular, total hip arthroplasty i...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章,评审
doi:10.1097/BOT.0b013e3181761490
更新日期:2009-07-01 00:00:00
abstract:SUMMARY:We present the previously unreported complication of symptomatic heterotopic ossification of the quadriceps following placement of a large-diameter Steinmann pin for the purpose of temporary skeletal traction. Following the development of distal quadriceps heterotopic bone formation in three patients, we conduc...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章,评审
doi:10.1097/00005131-200404000-00010
更新日期:2004-04-01 00:00:00
abstract::We used a mathematical model to determine whether the approach to derotation of the malrotated femur can be improved for use in corrective osteotomy of the femur. Rotational corrective osteotomy of the femur (RCOF) is a procedure performed by orthopedic surgeons to correct congenital femoral torsion deformities and po...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/00005131-199806000-00012
更新日期:1998-06-01 00:00:00
abstract:OBJECTIVE:To analyze the mechanical stability of locked plating in comparison with tension-band wiring for the fixation of fractures of the patella. METHODS:Biomechanical tests were performed on artificial foam patella specimens comparing an angular stable plate and monocortical screws with tension-band wiring. Tests ...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000000309
更新日期:2015-09-01 00:00:00
abstract:OBJECTIVES:To investigate the clinical utility of additional axillary or Velpeau views in evaluating potential shoulder trauma after a standard radiograph series of anteroposterior, Grashey, and/or trans-scapular views. DESIGN:Retrospective study. SETTING:Level I academic medical center. PATIENTS:All patients in a 1...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000001760
更新日期:2020-08-01 00:00:00
abstract:OBJECTIVES:To compare open reduction and internal fixation (ORIF) and nonsurgical treatment outcomes in displaced midshaft clavicle fractures. DATA SOURCES:PubMed, MEDLINE, EMBASE, Web of Science, Cochrane Library, and ClinicalTrials.gov were searched in September 2017. STUDY SELECTION:Inclusion criteria were randomi...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章,meta分析
doi:10.1097/BOT.0000000000001174
更新日期:2018-07-01 00:00:00
abstract::Tibial plateau fractures can involve planes that require reduction and stabilization from a posterior approach. This includes posteromedial, posterolateral, and posterior column shear type injuries. This video outlines the prone posteromedial approach to the tibial plateau for posterior column fracture exposure, reduc...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0000000000001826
更新日期:2020-08-01 00:00:00
abstract::Osteochondritis dissecans of the elbow mainly involves the capitellum; however, no authors have reported the condition in the radial head with subluxation of the radial head. We report four cases in which osteochondritis dissecans involved the radial head and was accompanied by radial head subluxation. All patients we...
journal_title:Journal of orthopaedic trauma
pub_type: 杂志文章
doi:10.1097/BOT.0b013e318214d678
更新日期:2012-01-01 00:00:00