Mechanical effects of off-axis insertion of locking screws: should we do it?

Abstract:

OBJECTIVES:The purposes of this study were to evaluate the cantilevered bending strength and failure modes of locking screws inserted at various angles in a plate with fully circumferential threaded holes. As an additional measure, the amount of screw head prominence at these angles was also assessed. METHODS:Standard 3.5-mm locking screws were inserted into round fully circumferential threaded holes through a standard straight 3.5-mm locking plate at various angles. The achieved angle of insertion and its prominence protruding from the far-bone side of the plate was measured using an optical luminescence technique. Each screw was then loaded at a constant rate until failure in a cantilevered bending scenario. The maximum cantilevered bending strength was measured, and the moment at failure was calculated. RESULTS:There was a positive correlation between increasing insertion angle and increasing prominence; a higher screw insertion angle yielded greater prominence. Prominence values ranged from negligible to 2 mm. As screw insertion angle increased, the bending moment at failure decreased. Screws inserted to 3 degrees or below primarily failed through screw deformation at the minor diameter below the head, whereas screws inserted to greater than 3 degrees primarily failed through locking mechanism disengagement. CONCLUSIONS:These findings indicate that cross threading may not be biomechanically advantageous and may change screw mode of failure. Based on these findings, screws inserted to 3 degrees or higher would reduce the bending moment at failure to approximately 50% of an orthogonally inserted screw.

journal_name

J Orthop Trauma

authors

Cartner JL,Petteys T,Tornetta P 3rd

doi

10.1097/BOT.0000000000000066

subject

Has Abstract

pub_date

2014-01-01 00:00:00

pages

S2-5

eissn

0890-5339

issn

1531-2291

journal_volume

28 Suppl 1

pub_type

杂志文章
  • Distraction external fixation in lateral compression pelvic fractures.

    abstract:OBJECTIVE:To observe the results and describe the technique of closed reduction and placement of a two-pin supra-acetabular external fixator, followed by immediate weight bearing, in the treatment of displaced vertically stable lateral compression pelvic fractures. DESIGN:Prospective, consecutive. SETTING:Regional tr...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:

    authors: Bellabarba C,Ricci WM,Bolhofner BR

    更新日期:2006-01-01 00:00:00

  • Biomechanical Stability of Volar Plate Only Versus Addition of Dorsal Ulnar Pin Plate: A Dorsal Ulnar Fragment, C-3-Type, Distal Radius, Cadaver Fracture Model.

    abstract:OBJECTIVE:To determine if the addition of a dorsal ulnar pin plate provides improved stability characteristics in the management of intra-articular distal radius fractures with an associated dorsal ulnar fragment. METHODS:OTA/AO type C3 fractures, with a dorsal ulnar fragment of one-third or one-half the width of the ...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/BOT.0000000000001776

    authors: Patrick NC,Lewis GS,Roush EP,Black SS,Henderson SR,Taylor KF

    更新日期:2020-09-01 00:00:00

  • The Effect of Implant Failure After Symphyseal Plating on Functional Outcome and General Health.

    abstract:OBJECTIVES:To relate the incidence of implant failure after internal anterior fixation of the pelvic ring to functional outcome and the health-related quality of life in patients. DESIGN:Retrospective chart and radiographic review. SETTING:Level I Trauma center. METHODS:We retrospectively identified all patients who...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/BOT.0000000000000501

    authors: Frietman B,Verbeek J,Biert J,Frölke JP

    更新日期:2016-06-01 00:00:00

  • Lengthening over a retrograde nail using 3 Schanz pins.

    abstract::The technique of lengthening over an antegrade nail is used widely for distraction osteogenesis of the femur. Most reported complications of this technique are related to Schanz pins. We hypothesized that reducing the number of Schanz pins would enable successful distraction with fewer complications. To this purpose, ...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/BOT.0b013e31824a3e66

    authors: Kucukkaya M,Karakoyun O,Kuzgun U

    更新日期:2013-01-01 00:00:00

  • Using a Validated Middle-Age and Geriatric Risk Tool to Identify Early (

    abstract:OBJECTIVES:(1) To demonstrate that a validated trauma triage score for middle-aged and geriatric patients could identify those at high risk of mortality within the first 2 days of hospitalization and (2) determine the cost of care for this cohort of patients. DESIGN:Prospective cohort study. SETTING:Single level 1 tr...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/BOT.0000000000001187

    authors: Lott A,Haglin J,Saleh H,Hall J,Egol KA,Konda SR

    更新日期:2018-07-01 00:00:00

  • Biomechanical Assessment of Locking Plate Fixation of Comminuted Proximal Olecranon Fractures.

    abstract:OBJECTIVES:To determine if mean ultimate strength or failure mechanism differed between comminuted olecranon fractures created at the proximal 25% or 50% of the trochlear notch and fixed with precontoured posterior locking plates (PLPs). METHODS:Comminuted osteotomies were created in 10 matched pairs of cadaveric uppe...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/BOT.0000000000001279

    authors: Fantry A,Sobel A,Capito N,Hodax JD,Pidgeon T,Koruprolu S,Rich R,Fava JL,Green A,Paxton S

    更新日期:2018-11-01 00:00:00

  • Traumatic anterior dislocation of the radial head in an adult.

    abstract::We report an isolated anterior dislocation of the radial head in an adult after sustaining a fall on the outstretched arm. Based on history and presentation, we speculate that the injury occurred in a position of hyperextension and supination. Reduction was achieved by a pronation maneuver. ...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/00005131-199505000-00014

    authors: Bonatus T,Chapman MW,Felix N

    更新日期:1995-01-01 00:00:00

  • Treatment of unstable peritrochanteric fractures in elderly patients with a compression hip screw or with the Vandeputte (VDP) endoprosthesis: a prospective randomized study.

    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

    authors: Stappaerts KH,Deldycke J,Broos PL,Staes FF,Rommens PM,Claes P

    更新日期:1995-01-01 00:00:00

  • Posteromedial Approach to Tibial Plateau Fracture Nonunion.

    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

    authors: Shields CN,Eftekhary N,Egol KA

    更新日期:2020-08-01 00:00:00

  • Can locking screws allow smaller, low-profile plates to achieve comparable stability to larger, standard plates?

    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

    authors: Garrigues GE,Glisson RR,Garrigues NW,Richard MJ,Ruch DS

    更新日期:2011-06-01 00:00:00

  • The Monteggia lesion and ipsilateral supracondylar humerus and distal radius fractures.

    abstract::Ipsilateral elbow and forearm fractures are quite rare in children. We present a Monteggia lesion with ipsilateral supracondylar humerus fracture in a 13-year-old girl. Through early surgical management, a successful result was achieved. We believe that, to minimize any initial or subsequent complications in such frac...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/00005131-199901000-00015

    authors: Arazi M,Oğün TC,Kapicioğlu MI

    更新日期:1999-01-01 00:00:00

  • Immediate Weight Bearing and Range of Motion After Internal Fixation of Selected Malleolar Fractures: A Retrospective Non-Inferiority Controlled Study.

    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

    authors: Fram BR,Rogero RG,Chang G,Krieg JC,Raikin SM

    更新日期:2020-11-09 00:00:00

  • The anterior intra-pelvic (modified rives-stoppa) approach for fixation of acetabular fractures.

    abstract:OBJECTIVES:Report the technical aspects, radiographic results, and complications after minimum 1-year follow up of the anterior intra-pelvic (AIP or modified Rives-Stoppa) approach as an alternative to the ilioinguinal approach for the treatment of acetabular fractures. DESIGN:Retrospective review. SETTING:Level I tr...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/BOT.0b013e3181dd0b84

    authors: Sagi HC,Afsari A,Dziadosz D

    更新日期:2010-05-01 00:00:00

  • Hip fractures: an increasing health care cost.

    abstract::Studies in several countries have indicated that there is likely to be a dramatic increase in the number of hip fractures in the early part of the 21st century. At a time when health care costs are coming under close scrutiny internationally, the added financial burden of the increasing number of fractures is of conce...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:

    authors: Cox MA,Bowie R,Horne G

    更新日期:1993-01-01 00:00:00

  • Anterior tension band plating for anterior tibial stress fractures in high-performance female athletes: a report of 4 cases.

    abstract::Stress fracture of the anterior tibial cortex is an extremely challenging fracture to treat, especially in the high-performance female athlete who requires rapid return to competition. Previous reports have not addressed treating these fractures in the world-class athlete with anterior plating. We hypothesize that ant...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/00005131-200607000-00011

    authors: Borens O,Sen MK,Huang RC,Richmond J,Kloen P,Jupiter JB,Helfet DL

    更新日期:2006-07-01 00:00:00

  • Ipsilateral combination Monteggia and Galeazzi injuries in an adult patient: a case report.

    abstract::Monteggia fractures represent approximately 1 to 2 percent of forearm fractures, whereas Galeazzi fractures represent 3 to 6 percent. The combination of these injuries in the same extremity is an exceedingly rare occurrence. We report a case of ipsilateral combination Monteggia and Galeazzi fractures in an adult patie...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/00005131-200202000-00011

    authors: Clare DJ,Corley FG,Wirth MA

    更新日期:2002-02-01 00:00:00

  • Mechanism of Injury Differentiates Risk Factors for Mortality in Geriatric Trauma Patients.

    abstract:OBJECTIVES:To evaluate the relationship between mechanism of injury and mortality in geriatric trauma patients and the ability of existing injury severity indices (ISIs) to assess mortality. DESIGN:Retrospective review. SETTING:Urban level 1 trauma center. PARTICIPANTS:Four thousand five hundred forty-five trauma pa...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/BOT.0000000000000281

    authors: Konda SR,Lack WD,Seymour RB,Karunakar MA

    更新日期:2015-07-01 00:00:00

  • Comparison of Outcomes of Intertrochanteric Fracture Fixation Using Percutaneous Compression Plate Between Stable and Unstable Fractures in the Elderly.

    abstract:OBJECTIVES:To evaluate the outcomes of treatment with a percutaneous compression plate (PCCP) in stable and unstable intertrochanteric hip fractures. DESIGN:Clinical prospective nonrandomized cohort study. SETTING:San Cecilio University Hospital, Granada (Spain). A tertiary-care hospital. PATIENTS:Patients older tha...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/BOT.0000000000000509

    authors: Carvajal-Pedrosa C,Gómez-Sánchez RC,Hernández-Cortés P

    更新日期:2016-06-01 00:00:00

  • Accuracy study of computer-assisted drilling: the effect of bone density, drill bit characteristics, and use of a mechanical guide.

    abstract:OBJECTIVE:This study was designed to determine the clinical relevant accuracy of CT-based navigation for drilling. DESIGN:Experimental model. SETTING:Laboratory. METHODS:Twelve drills of varying lengths and diameters were tested with 2 different set-ups. Group 1 used free-hand navigated drilling technique with foam ...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:

    authors: Hüfner T,Geerling J,Oldag G,Richter M,Kfuri M Jr,Pohlemann T,Krettek C

    更新日期:2005-05-01 00:00:00

  • Calcaneal Avulsion Fractures: A Multicenter Analysis of Soft-Tissue Compromise and Early Fixation Failure.

    abstract:OBJECTIVE:To characterize the presentation and outcomes of calcaneal avulsion fractures. DESIGN:Case series. SETTING:Two ACS Level I trauma centers. PATIENTS/PARTICIPANTS:Forty-seven calcaneal avulsion fractures isolated from a cohort of 1365 calcaneus fractures treated over a 17-year period. MAIN OUTCOME MEASUREME...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章,多中心研究

    doi:10.1097/BOT.0000000000001582

    authors: Mitchell PM,OʼNeill DE,Branch E,Mir HR,Sanders RW,Collinge CA

    更新日期:2019-11-01 00:00:00

  • Slow rebound of cancellous bone after mainly steroid-induced osteoporosis in ovariectomized sheep.

    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

    authors: Goldhahn J,Jenet A,Schneider E,Lill CA

    更新日期:2005-01-01 00:00:00

  • Cross-sectional geometry of the sacral ala for safe insertion of iliosacral lag screws: a computed tomography model.

    abstract:OBJECTIVE:To measure the dimensions of the narrowest portion of the sacral ala for safe insertion of iliosacral lag screws. DESIGN:Computed tomography (CT) model. SETTING:Level One trauma center. PATIENTS:Thirteen adult patients underwent pelvic CT imaging. MAIN OUTCOME MEASURE:Axial CT scans of intact pelves were ...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/00005131-200001000-00007

    authors: Noojin FK,Malkani AL,Haikal L,Lundquist C,Voor MJ

    更新日期:2000-01-01 00:00:00

  • Biomechanical study of atlantoaxial arthrodesis: transarticular screw fixation versus modified Brooks posterior wiring.

    abstract:OBJECTIVE:The purpose of the present study was to compare the biomechanical stability of C1 and C2 vertebrae after treatment of ligamentous instability by either modified Brooks posterior wiring (MB) or transarticular screw (TAS) techniques. We hypothesized that the TAS technique would be more stable because of direct ...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/00005131-199909000-00004

    authors: Mitchell TC,Sadasivan KK,Ogden AL,Mayeux RH,Mukherjee DP,Albright JA

    更新日期:1999-09-01 00:00:00

  • Improving business IQ in medicine through mentorship and education.

    abstract::Business intelligence in the field of medicine, particularly with physicians, has been an abstract concept at best with no objective metric. Furthermore, in many arenas, it was taboo for medical students, residents, and physicians to discuss the business and finances of their work for fear that it would interfere with...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/BOT.0000000000000177

    authors: Hill AD

    更新日期:2014-09-01 00:00:00

  • Biomechanics of Ender rods, compression screw, and Zickel nail in the fixation of stable subtrochanteric femur osteotomies.

    abstract::Compression screws, Ender rods, and Zickel nails were evaluated mechanically to determine their resulting stability in the fixation of experimental subtrochanteric femur osteotomies. Twenty-five pairs of human cadaver femurs were used. Experimental osteotomies were created and a random member of each pair was fixed wi...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/00005131-199003000-00010

    authors: Wainer RA,Wright PH,Gilbert JA,Taylor DF

    更新日期:1990-01-01 00:00:00

  • Locking plates for distal femur fractures: is there a problem with fracture healing?

    abstract:OBJECTIVES:Fractures of the distal femur are severe injuries that present many clinical challenges. Nonunion, delayed union, implant failure, and the need for secondary procedures can reflect complications of healing. This article reviews the literature on distal femur fractures treated with locking plates to determine...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章,评审

    doi:10.1097/BOT.0b013e3182070127

    authors: Henderson CE,Kuhl LL,Fitzpatrick DC,Marsh JL

    更新日期:2011-02-01 00:00:00

  • Intracardiac malpositioning of a sternoclavicular fixation wire.

    abstract::A case of intracardiac malpositioning of a sternoclavicular Kirschner pin is reported. After an uneventful closed wire-fixation of sternoclavicular subluxation and a normal postanesthetic recovery, a 17-year-old male patient developed opacification of the right hemithorax and signs of internal bleeding. The lateral ch...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:

    authors: Smolle-Juettner FM,Hofer PH,Pinter H,Friehs G,Szyskowitz R

    更新日期:1992-01-01 00:00:00

  • Alleviation of Pain After Femur and Tibia Shaft Fractures Using Nothing Stronger Than Codeine and Tramadol.

    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

    authors: Reich MS,Klahs KJ,Fernandez I,Nguyen MP

    更新日期:2020-02-01 00:00:00

  • Shoulder Arthrodesis.

    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

    authors: Legato JM,OʼConnell M,Fuller DA

    更新日期:2018-08-01 00:00:00

  • The effects of varus or valgus malalignment of proximal ulnar fractures on forearm rotation.

    abstract:INTRODUCTION:Proximal ulna fractures can cause a significant loss of forearm rotation, elbow stiffness, and disability. The objective of this study was to quantify the loss of forearm rotation after simulated varus and valgus malunions of the proximal ulna. METHODS:Eight cadaveric upper extremities were used to quanti...

    journal_title:Journal of orthopaedic trauma

    pub_type: 杂志文章

    doi:10.1097/BOT.0b013e31829f5ebc

    authors: Snow BJ,Javidan P,Itamura JM,Lee TQ

    更新日期:2014-03-01 00:00:00