Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “External Fixators”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 865 records · Page 48Linked to original sources
PubMed1989

[The treatment of distal splinter fractures using an external fixator. Indications and technic].

To sum up we can say that only 10-20% of the distal radius fractures are treated by an external fixator. The combination with the percutaneous Kirschner wire-osteosynthesis is a must for us. About 80 to 90% of the cases are provided according to the category A, that means closed. For 10 to 20% the opened reposition and spongiosa bone graft is needed whereby here the fixator will be put primary for distraction and ligamental replacement. The results of 85% can be judged as good or very good. 15% only are satisfactory or insufficient. These experiences are corresponding to the results of Cooney (1980) and Vidal (1977). Contrary to the original opinion that the older patient is not suited for this treatment it was showed that the incidence of the dystrophy is not higher in an advanced age. The assumption for a successful use of the external fixator is the choice of a suitable fracture, the readiness of the patient for cooperation and the possibility of a regular after-care and control. In that sense the technic completes the normal therapeutical method in the treatment of the distal radius-fracture.

Fracture Fixation↗
PubMed1992

[A mini circular external fixator--Kosevo type].

In this experiment we showed factors of interest for compression's grade after experimental examination. We used mini circular external fixator type Kosevo and showed it's employment. The conclusion that the compression's grade was 30 kp/cm2 and depend of bone's thickness. At the end you can see clinical and medical economic effects of using thus fixator.

External Fixators↗
PubMed1996

The influence of external fixators on fracture motion during simulated walking.

This experimental study examines the relative influence of five unilateral external fixators on tibial fracture stability during simulated walking. Stability during routine patient activity is important, because cyclic inter fragmentary motion, or strain, has been shown to affect fracture healing. In model stable fractures simulating early healing (six weeks), it was found that fixators do little to constrain against axial inter fragmentary strains as great as 100% at only nominal weight-bearing (6.0 kg). These strains may occur repeatably at peak amplitudes of motion during walking. Similarly, peak angular movements may lead to additional axial strains of up to 25% at the external cortex and shear movements may lead to shear strains of up to 100%. Such strains are great enough to yield and possibly refracture the intra gap fracture tissue that may be composed of a combination of granulation tissue, fibrous cartilage, cartilage and bone. It was also shown that the procedure of releasing the fixator column to telescope (dynamize) has little influence on peak cyclic axial motion and on loading at the fracture, although increases occurred in peak transverse and torsional shear strains of up to 100%. Since permanent inter fragmentary translation also arises from the consequent compaction of the intra gap tissue, it may be permanent displacement rather than any change in the amplitude of motion that is responsible for the beneficial effect on healing claimed for the dynamizing procedure. In unstable fractures that are unable to support tibial load at the fracture, the peak amplitudes of cyclic movement were as great as those reported for fractures stabilized by plaster casts, and were approximately twice the movement of the stable fractures simulating early healing. Therefore, patients with unstable fractures supported by external fixators, may be expected to have similar patterns of healing to plaster-casted patients with similar fractures.

Biomechanical Phenomena↗
PubMed1984

Stability of external fixators used for knee arthrodesis after failed knee arthroplasty.

Secondary arthrodesis as treatment for failed knee arthroplasty is being used increasingly. The usual method is sustained rigid external fixation. The fusion rate is low in cases with considerable metaphyseal bone loss and poor bone quality. Currently, the Hoffmann- Vidal fixator or comparable designs are preferred to the less stable Charnley single frame fixator. The standard Hoffmann- Vidal device uses only transverse percutaneous fixating pins and gives an anteroposterior bending stiffness that is considerably lower than the lateral bending stiffness. In the present study, external fixators were tested for stability in a material testing machine under standardized conditions using synthetic bones. The anteroposterior bending stiffness was significantly improved when sagittal pins connected to a ventral compression rod were added to a Hoffmann- Vidal fixator. Stiffness was still more improved when sagittal pins were connected to ventral frames as in a modification of the Hoffmann- Vidal or the similar Ace-Fischer fixator.

Arthrodesis↗
PubMed1989

[External fixators in treatment of severe fractures of the pelvis].

The use of external fixation for pelvic injuries is mainly determined by the type of pelvic girdle fracture and by the severity of the general injury. Exact diagnosis of the extent of injuries can be made with a pelvic X-ray a.p. Pennal's technique and CT imaging. The iliosacral joint can be repositioned by transduced compression via Schanzscrews inserted above the acetabulmum and directed toward the iliosacral joints. Triangular compression frame construction is applied along the plane of the pelvic inlet. The advantages include easier intensive care, early functional mobilization, minimised trauma and decreased blood loss. Disadvantages are the risk of pin tract infection and patient discomfort. Of 92 patients treated thus, these were 11 cases of ankylosis of the iliosacral joint, two malunions and two persistent instabilities of the pelvic girdle.

External Fixators↗
PubMed1991

Our contribution to the external fixation in traumatology.

The experience is summarized in using the method of external fixation (Stuhler-Heise from Aesculap, Poldi 7, Ilizarov's compressory distractive devices) in the traumatology of extremities within 5-year lasting period. Starting from june 1985 to July 1990, the amount of 90 open fractures of long bones has been managed (10.2% of all fractures admitted). Open fractures related to III. grade by Gustilo's classification were 20 in number, i.e. 22.0% of all open fractures admitted with anatomical distribution as follows: 50% crural, 25% humeral, 15% forearm and 10% femoral locations. The EF device was applied in 11 cases, i.e. 55%. Primary amputations were done in 4 cases, i.e. 20%. The EF application period averaged for 64 days. One case showed primary healing of EF treated fractures. The remaining cases attributed an exchange of the type of osteosynthesis or were supplemented with plastic surgery on the soft tissues and bone. Another group of 36 pseudoarthroses of long bones were operated on within the mentioned period, from them 9 cases as infected ones were treated with EF method. Once the infection has been healed, the authors proceeded with surgery and EF exchange in all cases when treating pseudoarthroses. Third--the group of 18 nonstabile intraarticular fractures of distal radius treated by means of EF is presented. The advantages of individual EF methods are discussed, and the comprehensive care approaches are presented in documental groups of injuries as illustrated with the short case-reports.

External Fixators↗
PubMed2002

[Rotational osteotomy technique for congenital radio-ulnar synostosis with central medullary nailing and external fixation].

PURPOSE OF THE STUDY: Congenital radio-ulnar synostosis is a very uncommon condition. The functional impairment resulting from the complete pronation posture justifies rotational osteotomy. We present a series of six rotational osteotomies using the Hernigou-Goutallier technique. MATERIAL AND METHODS: The Hernigou-Goutallier osteosynthesis procedure is based on a centromedullary nail and two external fixation pins positioned in the ulna at an angle corresponding to the desired rotation. The nail is partially withdrawn to allow subperiosteal osteotomy in the synostosis via a horizontal incision between the two pins. After rotation, the osteotomy is stabilized with clamps holding the external fixation pins in parallel. RESULTS: Bone healing was achieved at two months in all six cases with no loss of correction. DISCUSSION: Among the different treatments proposed for radio-ulnar synostosis, the risk of vessel or nerve injury is high with screw-plate fixation despite shortening osteotomy. Palm-tree osteotomy raises the same risks and is more invasive and difficult to achieve. The rotational osteotomy technique presented here has the advantage of allowing local care more easily than with cast fixation. Another important advantage is that an overcorrection leading to vessel or nerve injury can be reversed without losing the axis, allowing progressive correction if necessary.

Bone Nails↗
PubMed2005

External fixation for unstable intra-articular distal radial fractures in women older than 55 years. Acceptable functional end results in the majority of the patients despite significant secondary displacement.

UNLABELLED: Unstable intra-articular distal radial fractures in women older than 55 years were treated by closed reduction and external fixation to achieve the best functional outcome. Sixteen women had radiographic and functional assessment. Despite initial good alignment secondary displacement occurred in 11 patients, probably due to the comminution of the fracture and possibly influenced by osteoporosis. Malunion of the distal radius was seen in two patients and intra-articular incongruity with an intra-articular step exceeding 1 mm was observed in two other patients. The functional outcome was excellent or good in 10 and fair in two patients. Four patients had a poor functional outcome. Two of these patients had a significant loss of reduction, one resulting in a malunion. The other two had an intra-articular incongruity of more than 1 mm. Three of the four patients with a poor functional outcome had clinical signs of reflex sympathetic dystrophy. CONCLUSION: Closed reduction and external fixation of "bad case" severely comminuted unstable distal radial fractures in the elderly may result in an acceptable functional outcome in the majority of the cases, although significant secondary displacement occurred in eleven of the sixteen patients.

Accidental Falls↗
PubMed1988

The small AO external fixator in the treatment of unstable distal forearm fractures.

Sixteen patients with severely comminuted displaced fractures of the distal radius and ulna, who were treated with a small AO external fixator, have been reviewed at an average of 2.2 years after injury. Removal of the fixator, at an average of 4.9 weeks, was followed by significant alteration in position in some cases. The external fixator should be retained for eight weeks to reduce the risk of loss of position. In those cases with a good or excellent anatomical result on radiological assessment after removal of the fixator, the functional results were good or excellent in 80%.

Female↗
PubMed2004

Ilizarov external fixation salvage of failed intramedullary fixation of tibia with nail retention.

Failure of intramedullary fixation of the tibia presents a unique problem, as improving fracture alignment is often difficult after nail placement. The purpose of this study was to demonstrate the effectiveness of the Ilizarov technique in obtaining anatomic union after failed intramedullary fixation of the tibia. We reviewed medical records and plain radiographs of 4 men who, at a tertiary-care facility, presented with failed intramedullary fixation of the tibia. Mean age was 28 years (range, 23-36 years). All 4 patients underwent reduction and external fixation by the llizarov technique with retention of the intramedullary nail. Anatomic union was attained in each case. Thin-wire circular-frame external fixation by the Ilizarov technique was a viable salvage option for failed intramedullary fixation of the tibia.

Adult↗
PubMed1985

Pin-hole changes after external fixation of tubular bone.

K-wire-pin-induced changes in cortical bone were studied in the intact rabbit tibiofibular bone. Using a bilateral external fixator two pairs of pins were applied under compression (10 kp), under distraction (10 kp), and in a neutralization sense. After defined intervals the pin-holes were investigated macroscopically and radiologically. Reactive and resorptive changes were present in 101 of 576 (17.5%) pin-holes, infection in 13 (2.3%) pin-holes. Changes were significantly more frequent in the distal pin-holes. The appearance of the pin-holes was not influenced by the type of external fixation used nor did the occurrence depend on the duration of metal implantation.

Animals↗
PubMed1988

Complex femur fractures: treatment with the Wagner external fixation device or the Grosse-Kempf interlocking nail.

One hundred complex femur fractures were treated with the Grosse-Kempf interlocking nail and 35 were treated with the Wagner external fixation device. Retrospectively, we analyzed the results in the two groups to determine specific indications for the future use of these nails. The Grosse-Kempf nail, although a technically demanding procedure, achieved excellent overall end results in comminuted closed fractures, and in Type I, Type II, and some Type III open fractures after appropriate wound care. We found that the Wagner apparatus was a simple, easy device for obtaining initial fracture stabilization in contaminated Type III-B and Type III-C open fractures. It does, however, require substantial postoperative care; four cases required secondary intramedullary fixation. We found a high infection rate with secondary reamed intramedullary nailing after initial stabilization with the external fixator.

Adolescent↗
PubMed1985

[Modified Schanz screws for the external fixator].

In order to make a comparison with conventional implants, our recently developed 5/8 mm screws of Schanz were put in the lateral clamp of an external fixation unit applied to the femur. By using the modified 5/8 mm screws of Schanz, an increased stability and a reduced number of implants can be achieved. The results are not only applicable for the external fixation of the femur investigated by us, but also for unilateral fixation of the tibia.

Biomechanical Phenomena↗
PubMed2006

Comparison between external fixation and sliding hip screw in the management of trochanteric fracture of the femur in Nepal.

We conducted a randomised controlled trial to compare external fixation of trochanteric fractures of the femur with the more costly option of the sliding hip screw. Patients in both groups were matched for age (mean 67 years, 50 to 100) and gender. We excluded all pathological fractures, patients presenting at more than one week, fractures with subtrochanteric extension or reverse obliquity, multiple fractures or any bone and joint disease interfering with rehabilitation. The interval between injury and operation, the duration of surgery, the amount of blood loss, the length of hospital stay and the cost of treatment were all significantly higher in the sliding hip screw group (p < 0.05). The time to union, range of movement, mean Harris hip scores and Western Ontario and McMaster University knee scores were comparable at six months. The number of patients showing shortening or malrotation was too small to show a significant difference between the groups. Pin-track infection occurred in 18 patients (60%) treated with external fixation, whereas there was a single case of wound infection (3.3%) in the sliding hip screw group.

Aged↗
PubMed1979

The Portsmouth method of external fixation of complicated tibial fractures.

A New method of external fixation for complicated fractures of the tibia is described. The use of acrylic cement to secure the tibial transfixing pins to the external bar and the ability to apply compression across the fracture site are the salient features of this technique, which is simple to use and inexpensive.

Bone Nails↗
PubMed1995

Pins and plaster vs external fixation in the treatment of unstable distal radial fractures. A randomized prospective study.

90 unstable fractures of the distal radius were studied in a randomized, prospective manner. Follow-up consisted of patient questionnaire, medical record review, therapist evaluation and radiography at 4 months, 1 year and 2 years post-operatively. Overall results were good or excellent in 94%. No significant differences were found between treatment groups (external fixation and pins and plaster) in final results, range of motion, intrinsic tightness, grip strength, or the presence of arthritis. The complication rate was high for both groups (45%), and half of the complications were major. External fixation maintained radial length more effectively (significantly in those patients followed for 2 years) but was associated with higher initial costs (20 times) and a greater number of minor complications.

Adolescent↗
PubMed2005

The role of the small AO external fixator in supracondylar rotational femoral osteotomies.

Torsional problems of the femur have been traditionally treated by a proximal osteotomy with internal fixation. We elected to perform femoral derotational osteotomies distally. Between September 1994 and April 2001, supracondylar osteotomies were performed on 38 femora in 21 children with torsional and angular deformities. The average age was 9 years (range 5-15 years). Twenty-three femora had excessive anteversion and fifteen, retroversion. All osteotomies were maintained by the small AO external fixator. Bony union occurred at an average of 10 weeks. Distal femoral osteotomy is an effective site for correcting rotational and associated angular deformities. The small AO external fixator provides precise adjustability, solid stability, and avoids a second procedure for hardware removal.

Adolescent↗
PubMed1993

External fixation for the treatment of Kienböck's disease.

With the advent of magnetic resonance imaging, the diagnosis of avascular necrosis of carpal bones can be made early, well before collapse and derangement of carpal mechanics occur. We believe that neutralization of forces early in the course of disease may permit natural healing (revascularization) of the bone. It is questionable whether tubular casts can supply adequate neutralization of force. We recommend the consideration of external fixation, rather than more extensive surgery, as a rational alternative for this purpose. After surgical revascularization, carpal bones go through a resorptive phase that makes them highly susceptible to collapse from compressive forces across the wrist. We advocate the postoperative use of an external fixator to neutralize these forces after a revascularization procedure is performed.

Adult↗