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PubMed1990

Tophaceous gout simulating infection about a stainless steel plate.

A 55-year-old man developed acute symptoms suggestive of a late, deep infection 8 years after uncomplicated open reduction and internal fixation of fractures to the left ulnar and radial shafts. At the time of surgical debridement, tophaceous material was found surrounding the radial plate. Acute tophaceous gout surrounding fracture fixation devices has not been previously reported and is difficult to distinguish from a deep infection.

Acute Disease↗
PubMed1975

Biomechanical analysis of structural stability of internal fixation in fractures of the thoracolumbar spine.

Three different methods of internal fixation for the flexion-rotation thoracolumbar spinal fractures were tested biomechanically in a cadaver model for strength, mode of failure and ease of application. The compression rod system was clearly superior in strength and rotational stability to the spring device, but it was more difficult to apply than springs. The distraction rod system exhibited an intermediate level of strength with adequate rotational stability. Technically, the method is exacting and requires a clear understanding of its principle of 3 point fixation.

Biomechanical Phenomena↗
PubMed2002

Open reduction and internal fixation of fractures of the radial head.

BACKGROUND: The purpose of this retrospective study was to analyze the functional results following open reduction and internal fixation of fractures of the radial head and to determine which fracture patterns are most amenable to this treatment. METHODS: Fifty-six patients in whom an intra-articular fracture of the radial head had been treated with open reduction and internal fixation were evaluated at an average of forty-eight months after injury. Thirty patients had a Mason Type-2 (partial articular) fracture, and twenty-six had a Mason Type-3 (complete articular) fracture. Twenty-seven of the fifty-six fractures were associated with a fracture-dislocation of the forearm or elbow or an injury of the medial collateral ligament. Fifteen of the thirty Type-2 fractures were comminuted. Fourteen of the twenty-six Type-3 fractures consisted of more than three fragments, and twelve consisted of two or three fragments. The result at the final evaluation was judged to be unsatisfactory when there was early failure of fixation or nonunion requiring a second operation to excise the radial head, <100 degrees of forearm rotation, or a fair or poor rating according to the system of Broberg and Morrey. RESULTS: The result was unsatisfactory for four of the fifteen patients with a comminuted Mason Type-2 fracture of the radial head; all four fractures had been associated with a fracture-dislocation of the forearm or elbow, and all four patients recovered <100 degrees of forearm rotation. Thirteen of the fourteen patients with a Mason Type-3 comminuted fracture with more than three articular fragments had an unsatisfactory result. In contrast, all fifteen patients with an isolated, noncomminuted Type-2 fracture had a satisfactory result. Of the twelve patients with a Type-3 fracture that split the radial head into two or three simple fragments, none had early failure, one had nonunion, and all had an arc of forearm rotation of > or =100 degrees. CONCLUSIONS: Although current implants and techniques for internal fixation of small articular fractures have made it possible to repair most fractures of the radial head, our data suggest that open reduction and internal fixation is best reserved for minimally comminuted fractures with three or fewer articular fragments. Associated fracture-dislocation of the elbow or forearm may also compromise the long-term result of radial head repair, especially with regard to restoration of forearm rotation.

Adolescent↗
PubMedDate not supplied

Internal fixation of fractures: evolution of concepts.

The recognized goal of any fracture treatment is the restoration of normal function to the injured part(s). Historically, this was first achieved with non-operative techniques and more recently with operative fixation of fractures. Newer systems utilizing the principles of rigid internal fixation and a sophisticated armamentarium have proved useful in fractures of both bones of the forearm, major intra-articular joint fractures and the multiply injured patient. With these methods "fracture disease" (i.e. muscle atrophy, joint stiffness and bony demineralization) is decreased by early mobilization without external support. The penalties for inadequate surgery are nonrigid fixation and/or infection, emphasizing that the operative treatment of fractures is a technique to be mastered.

Europe↗
PubMed2000

Fixation of fractures of the shaft of the humerus by dynamic compression plate or intramedullary nail. A prospective, randomised trial.

We randomised prospectively 44 patients with fractures of the shaft of the humerus to open reduction and internal fixation by either an intramedullary nail (IMN) or a dynamic compression plate (DCP). Patients were followed up for a minimum of six months. There were no significant differences in the function of the shoulder and elbow, as determined by the American Shoulder and Elbow Surgeons' score, the visual analogue pain score, range of movement, or the time taken to return to normal activity. There was a single case of shoulder impingement in the DCP group and six in the IMN group. Of these six, five occurred after antegrade insertion of an IMN. In the DCP group three patients developed complications, compared with 13 in the IMN group. We had to perform secondary surgery on seven patients in the IMN group, but on only one in the DCP group (p = 0.016). Our findings suggest that open reduction and internal fixation with a DCP remains the best treatment for unstable fractures of the shaft of the humerus. Fixation by IMN may be indicated for specific situations, but is technically more demanding and has a higher rate of complications.

Adult↗
PubMed1988

Treatment of open tibial-shaft fractures. External fixation and secondary intramedullary nailing.

Between 1979 and 1986, sixteen of 369 open fractures of the tibial shaft were treated by external fixation followed by intramedullary nailing. These fractures comprised one Type-I, two Type-II, and thirteen Type-III injuries. This method of treatment was the original treatment plan in nine patients (56 per cent), for delayed union while the external fixator was still in place in four patients (25 per cent), for loss of reduction in a plaster cast in two patients (13 per cent), and for osteomyelitis and a segmental defect in one patient (6 per cent). The average duration of external fixation was 8.5 weeks; the average time between removal of the external fixator and intramedullary nailing, three weeks; and the average time between injury and nailing, twelve weeks. All sixteen patients were followed until either the fracture had united (eleven patients) or there was an established non-union (five patients). At that time, seventeen additional procedures were performed, including bone-grafting, fibulectomy, and re-nailing. Only five of the sixteen fractures healed without additional surgical procedures or major complications. The five fractures that progressed to a non-union were all Type III, and all were complicated by a deep infection. Over-all, the complications included seven deep infections (an intramedullary infection in four patients, osteomyelitis in two, and a chronic draining sinus associated with a ring sequestrum in one); five minor infections during external fixation, which developed into five of the seven deep infections that occurred after the secondary intramedullary nailing; and eight non-unions, three of which progressed to union after multiple procedures. The over-all incidence of non-union was 50 per cent and that of deep infection, 44 per cent. On the basis of the high incidence of complications in both the present series and the few reports in the literature, we concluded that alternative treatment options should be carefully considered before electing this sequential method of fixation.

Adolescent↗
PubMed1998

Mennen paraskeletal plate fixation for fracture of the femoral shaft in association with ipsilateral hip arthroplasty.

We reviewed the results of Mennen paraskeletal plate fixation in 14 patients with fracture of the femoral shaft in association with a previously successful ipsilateral hip arthroplasty. Overall good results were obtained with undisplaced fractures but some of the results in those individuals with widely displaced and unstable fractures were disappointing leading to some serious complications including amputation. The paraskeletal plate appears then to be no more than an internal splint and caution needs to be exercised when this device is used in this situation.

Aged↗
PubMed2004

Bactericidal activity of antimicrobial coated polyurethane sleeves for external fixation pins.

This study was conducted to assess the potential of gentamicin coated polyurethane sleeves to inhibit bacterial colonization on external fixation pins and wires. These antimicrobial sleeves have been designed to be fitted over the pins and wires, at the time of surgery, as a prophylactic approach to combat the major complication of external fixation treatment, pin tract infection. Elution testing was conducted to estimate the amount of gentamicin released into the pin tract. These gentamicin concentrations were compared to the gentamicin minimal inhibitory concentration (MIC) level for common pin tract pathogens. Elution testing revealed that the gentamicin coated polyurethane sleeves released significant quantities of the antibiotic for up to 26 weeks. The initial bolus release was characterized by predicted pin tract gentamicin concentrations of >80 microg/ml at the 2 h and 1 day elution time points. These amounts of gentamicin, delivered directly to the pin tract, are far beyond those that could be achieved via oral or intravenous administration. Furthermore, the expected concentration of gentamicin in the pin tract remained above the National Committee for Clinical Laboratory Standards (NCCLS) MIC breakpoint of 4 microg/ml, [Performance standards for antimicrobial susceptibility testing: twelfth informational supplement M100-S12, NCCLS, Wayne, PA, 2002], for at least 20 weeks. Data from the SENTRY antimicrobial surveillance program (1997-2002) established a high level of bactericidal activity for gentamicin, with 83.1% of the common pin tract pathogen isolates found to be susceptible to the antibiotic. The initial burst and subsequent long-term sustained local delivery of effective amounts of gentamicin from the antimicrobial sleeves would be expected to inhibit bacterial colonization on external fixation pins and wires. This inhibition of bacterial colonization should substantially reduce the incidence of pin tract infection, and improve the overall outcome and cost effectiveness of external fixation fracture management.

Bacteria↗
PubMed1981

Has the McLaughlin hip implant any future?

Modification of the nail-plate junction of conventional McLaughlin implants were manufactured. An additional washer was introduced between the back of the nail and the plate extension or the contract area was extended by modifying the nail base. Mechanical testing of the strength of the two modifications was performed. It is concluded that these modifications combined with replacement of the stiff nail by a sliding nail might provide a free angle device suitable for fracture fixation in trochanteric fractures.

Bone Nails↗
PubMed1979

Internal fixation of fractures of the third phalanx in three horses.

The technique of internal fixation of intra-articular fractures of the third phalanx using lag screw interfragmentary compression is described. Three cases are discussed and the successful treatment of infection and osteomyelitis described in one of them. Despite this potential complication internal fixation offers a better prognosis and also a more rapid return to work than non-operative treatments.

Animals↗
PubMedDate not supplied

Comparison of dynamic versus static external fixation for pediatric femur fractures.

External fixation of pediatric femoral shaft fractures has the advantages of minimal dissection and early weight bearing. However, it is associated with slow healing and potential for refracture. Some surgeons have proposed that axial dynamization may improve the speed and strength of callus formation. to test this hypothesis, we performed a randomized controlled trial using 53 femur fractures in 52 patients between 1995 and 1999. Patients were randomized to receive dynamic or static fixation. Average time until early callus formation was 23.2 days for dynamic fixation and 24.9 days for static fixation (P = 0.627). Average time until complete radiographic healing was 70.1 days for dynamic fixation and 63.1 days for static fixation (P = 0.370). Similarly, the differences in time to fixator removal and to full weight bearing did not reach statistical significance. The conclusion was that axial dynamization of external fixation for pediatric femur fractures has no significant effect on time to healing or frequency of complications.

Child↗
PubMed2003

Sub- or intertrochanteric fracture following screw fixation of an intracapsular proximal femoral fracture: true complication or technical error?

PURPOSE: To review, retrospectively, the possible causes of sub- or intertrochanteric fractures after screw fixation of intracapsular fractures of the proximal femur. METHODS: Eighty-four patients with an intracapsular fracture of proximal femur were operated between 1995 and 1998 by using three cannulated 6.25 mm screws. The screws were inserted in a triangular configuration, one screw in the upper part of the femoral neck and two screws in the inferior part. Between 1999 and 2001, we use two screws proximally and one screw distally. RESULTS: In the first series, two patients died within one week after operation. Sixty-four fractures healed without problems. Four patients developed an atrophic non-union; avascular necrosis of the femoral head was found in 11 patients. Three patients (3.6%) suffered a sub- and/or intertrochanteric fracture after a mean postoperative time of 30 days, in one case without obvious trauma. In all three cases surgical revision was necessary. Between 1999 and 2001 we did not observe any fracture after screwing. CONCLUSION: Two screws in the inferior part of the femoral neck create a stress riser in the subtrochanteric region, potentially inducing a fracture in the weakened bone. For internal fixation for proximal intracapsular femoral fracture only one screw must be inserted in the inferior part of neck.

Adult↗
PubMed2002

The effects of dynamization and destabilization of the external fixator on fracture healing: a comparative biomechanical study in dogs.

This study compared the effects of axial dynamization and staged destabilization on fracture healing. Bilateral midshafts of canine tibiae were osteotomized and fixed with an external fixator. The hind limbs were divided into two groups: the destabilized group in which the fixator's stiffness was progressively reduced over time and the axially dynamized group in which the fixator was axially dynamized. The healed tibiae were tested for 3-point bending in the anteroposterior plane. The biomechanical tests performed 2 months postoperatively revealed that the side with the destabilized fixator was more rigid than the side with the axially dynamized fixator, but the differences were insignificant (P=.20). This study showed staged destabilization of the fixator's stiffness was as effective on the enhancement of fracture healing as axial dynamization.

Animals↗
PubMed1985

Internal fixation of fractures and non-unions of the humeral shaft. Indications and results in a multi-center study.

We performed ninety-six internal-fixation procedures for fracture or non-union of the humeral shaft in eighty-four patients, with a mean follow-up of 32.6 months (range, three months to fourteen years). The primary indications for operative intervention included humeral shaft fracture in a patient with multiple trauma, non-union, inadequate reduction of a humeral shaft fracture by closed methods, pathological humeral-shaft fracture, and progressive radial-nerve palsy. Methods of internal fixation included compression plates and screws and intramedullary Küntscher nails or Rush rods. The use of an AO/ASIF compression plate or interfragmentary lag screws with an AO/ASIF neutralization plate in twenty-seven multiply-injured patients resulted in a union rate of 100 per cent and generally good motion of the shoulder and elbow. Five multiply-injured patients also obtained good results through fixation by a modified Hackethal technique using two Rush rods. The use of intramedullary Küntscher nails resulted in a rate of union of 91 per cent in eleven multiply injured patients. Ten patients with non-union of a humeral shaft fracture had an 80 per cent rate of union with the use of an AO/ASIF compression plate. The use of a Küntscher nail in eleven patients with non-union resulted in a rate of union of only 73 per cent and frequently caused subacromial impingement. Fractures of the humeral shaft that had had an inadequate reduction by closed means or were associated with progressive radial-nerve palsy were best managed by a compression plate or the modified Hackethal technique.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗