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PubMed1989

[Myoplasty in total prosthesis of the hip joint].

When the hip joint is replaced by an artificial one, not infrequently a cavity is formed round the neck of the endoprosthesis which is impossible to be covered with local tissues. It is possible to eliminate such a cavity and prevent the formation of a hematoma by myoplasty. Taking into consideration the peculiarities of vascularization and topography of the muscles situated near the hip joint, several versions of myoplasty of the cavity have been worked out which are used in accordance with its size and localization in relation to the neck of endoprosthesis. Evacuation of the hematoma took place in 3 cases of the total number of 97 operations employing myoplasty, while it was performed in 13 cases of 190 operations without myoplasty. Therefore myoplasty involving musculus gluteus minimus, musculus gluteus medius, musculus rectus femoris and musculus vastus externus, with regard to the size and the localization of the cavity is reliable means of preventing hematoma in case of cavity formation near the neck of the endoprosthesis after the implantation of an artificial hip joint.

Hematoma↗
PubMed1989

[Polyethylene wear and late loosening of a total prosthesis of the hip joint. New perspectives for metal/metal pairing of the capsule and head].

Twenty-nine years' experience with total hip replacement surgery, including continuing quality control and follow-up studies, indicate that late loosening after 10-15 years is related to wear of the polyethylene cup. Metal-to-metal prostheses implanted 20 years ago and longer, on the other hand, show no signs of wear or loosening. In conclusion, polyethylene does not last long enough when compared to biocompatible precision-made artificial metal-metal hip joints.

Biocompatible Materials↗
PubMed1984

[Clinico-functional evaluation of patients operated for the removal of total prosthesis of the hip].

The authors report the clinico-functional results observed in 109 patients subjected to removal of a total hip replacement. After remarking the progressive increase in the aseptic mobilizations recorded during the last years, and after shortly stating the criteria whereby the prosthesized patients are controlled along with the time, they detailedly set forth the results. In conclusion, the results recorded are generally satisfactory, although the operation for removal of the replacement is an expedient badly fitting subjects in young or, anyhow, working age.

Equipment Failure↗
PubMed1997

Long-term results of use of the anatomic medullary locking prosthesis in total hip arthroplasty.

A total hip arthroplasty was performed, with use of the anatomic medullary locking hip system, in 223 consecutive, non-selected hips in 215 patients. The mean age of the patients at the time of the operation was fifty-five years (range, sixteen to eighty-seven years). Twenty-one patients (twenty-two hips) were lost to follow-up and twenty-seven patients (twenty-seven hips) died less than ten years postoperatively. The remaining 167 patients (174 hips) were followed for a minimum of ten years (mean, eleven years; maximum, thirteen years). There were twenty reoperations involving a component. The rate of survival at twelve years was 0.97 +/- 0.02 (mean and standard error) for the stem and 0.92 +/- 0.03 for the cup. Patients who had osteolysis were younger than those who did not have osteolysis (mean age, forty-seven compared with fifty-six years; p < 0.01). Similarly, patients who had a reoperation were younger than those who did not have a reoperation (mean age, forty-six compared with fifty-four years; p < 0.01). The radiographic appearance of progressive wear that, in our opinion, was severe enough to cause the femoral head to completely penetrate the polyethylene liner was the most frequent reason for reoperation.

Adolescent↗