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Results for “Orthopedic Fixation Devices”

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At least 19 recordsLinked to original sources
PubMed1975

The treatment of congenital dislocation and subluxation of the hip in the older child.

Two additional risks are involved in the treatment of congenital dislocation of the hip when diagnosis is made too late: avascular necrosis following the reduction, and residual coxo-femoral dysplasia. Our study and the experience that we acquired within the past 10 years on 142 hips show the value of closed reduction by slow progressive traction with abduction and internal rotation, and the value of innominate osteotomy. These are two strong points on which we can base our treatment in order to further improve the results of our efforts in this field.

Age Factors↗
PubMed1992

Effectiveness of absorbable fixation devices in Austin bunionectomies.

Forty-eight Austin bunionectomies were fixated by using an absorbable fixation device. Twenty-three were fixated with a 1.5- or 2.0-mm diameter Biofix rod and twenty-five were fixated with a 1.3-mm diameter Orthosorb pin. To be included in this project, all patients were followed radiographically for a minimum of 3 months. One foot (4%) fixated with Biofix developed a sterile sinus discharge 3 months postoperatively after uneventful wound healing. There were no clinical or radiographic changes seen in the feet in which Orthosorb was used. Also, there were no infections or osteotomy dislocations with either fixation device.

Biodegradation, Environmental↗
PubMed1992

[Inherent problems of the use of magnetic resonance in patients with metallic implants currently used in orthopedic practice].

Forty-eight patients with oncologic prosthetic devices (modular rotatory shoulder, Kotz, custom made) and metallic means of fixation (Sherman's plates, Ender's rods, etc.) underwent MRI in order to: 1) assess possible physical changes in the magnetic field or the alloys under examination; 2) detect the presence and type of artifacts, and 3) verify the onset of eventual noxious effects of the alloy on the patient. The diagnostic investigation was preceded by an experimental phase which was characterized by: A) a study of the temperature fluctuations of the alloys when submitted to the magnetic field and to radiofrequency; B) the identification and characterization of the artifacts, as well as C) their physical interpretation. During examination, there was no evidence of any mobilization of the means of fixation, sensation of endogenous heat, or other subjective complaints on the part of the patient. The authors observed that, even in the presence of artifacts, MRI provided good evaluation of the soft tissues around the devices by identifying tumor recurrences in the presence of an oncological prosthesis. MRI was also capable of showing trophic changes in the tissues surrounding the means of fixation. Thus, the method exhibits no contraindications in the study of these patients but, on the other hand, does not allow the evaluation of the integrity or mobilization of the prosthetic devices.

Adolescent↗
PubMed1992

[Development of synthetic bone models for the evaluation of fracture fixation devices].

Mechanical tests are indispensable for the research and development of internal devices used for fracture fixation. It is ideal to use fresh human bones even for in vitro experiments. However, fresh human bones are difficult to access, so that alternative materials have been developed. In this study, the applicability of synthetic tibia or femur models made from polyurethane resin (Hiprox) was studied, comparing the mechanical properties of both the synthetic models and the fresh human bones under fracture-fixation conditions using various fixation devices. When the models were designed to simulate the cortical bone with solid resin and the cancellous bone with porous resin, the mechanical properties can be fairly approximated to those of the fresh human bones. It was concluded that the Hiprox models are useful in for preliminary testing of fracture fixation devices.

Biomechanical Phenomena↗
PubMed1976

Surgical treatment of acromioclavicular dislocation.

The results of surgical treatment of 17 patients with complete acrominoclavicular dislocation are presented. The operative procedure described is technically easy, gives good results, has few complications which often follow operations using metallic fixation devices. A second operation to remove fixation devices is avoided.

Acromioclavicular Joint↗
PubMed1992

Latent psoas abscess after anterior spinal fusion.

This case is presented to emphasize that late infection should be considered in all postoperative patients as a cause of pain. A psoas abscess may remain dormant for many years after an anterior spinal procedure. It should be considered in the differential diagnosis of back pain and lumbar radiculopathy after anterior spinal fusion. The lumbar nerve plexus lies within the psoas muscle, and referred pain patterns may occur in the lumbar nerve distribution. In this case, dysesthesias occurred in the distribution of the genitofemoral nerve. The diagnosis and treatment of a psoas abscess has been greatly aided by use of CT and ultrasound. Either of these modalities may be used for directed percutaneous drainage of the abscess. The presence of metal fixation devices necessitates removal of the hardware in order to ensure eradication of the infection.

Adolescent↗
PubMed1979

[Infected total knee prostheses treated by Papineau's technique and arthrodesis (author's transl)].

The technique of arthrodesis of the knee after removal of an infected total prostheses is described. It was used in four cases. In the first stage, the prostheses and cement were removed, the wound was left open and knee immobilized by Hoffman external fixation. Details of the fixation are given. The second stage of filling of the wound by cancellous chips was performed two weeks later. On average, the fixation was removed after seven months. Some mechanical experiments were made to establish the best type of fixation device.

Aged↗