[Office diagnosis of congenital hip dislocation in infants].
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In the present work, from the position of final outcomes, have been analyzed the results of treatment of bilateral dysplastic femur dislocation with application of different methods of femur setting without correction of space position of proximal section of femur and cotyloid cavity. The best long-term results are observed with the patients, subjected to single-step closed or sparing open hip setting. Age-comparable groups of patients have similar characteristics of the final outcome structure. Open femur setting, following the pattern of arthroplasty, as traumatic intervention shouldn't be applied for bilateral hip dislocation treatment.
There is described the mechanism of development of hip joint instability of different types and associated secondary complications. Conservative biomechanical approach of treatment of residual instability and its complications: enchondral growth and ossification, delay, pathologic restructuring and coxarthrosis, is proposed.
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In 45 patients, 65 hips with CDH were given a THR after 5 years or more, with an average follow up of 8.5 years. The results and the technical problems are discussed. Of those 65 hips, there were 46 anterior dislocations, 15 intermediate dislocations and 4 cases of posterior dislocation. The mean shortening was 58.3 mm. In all cases, the authors performed a total arthroplasty on the original acetabulum, after lowering and reconstruction of the acetabulum by grafts taken from the femoral head. There are some immediate postoperative complications: 12 thromboembolic complications, hematomas and 2 cases of paralysis of the peroneal nerve. There was loosening in 8 patients (12%), with 3 infections. The functional results were good in 85% and poor in 7.5%. Nevertheless, the limp was maintained in 49 patients. There was residual low back pain in 7 patients. In 14% a second operation on the homolateral knee was performed after an average time of 2 years. The technical problems are discussed: the cup should be placed in the original acetabulum and in evaluating the lowering of the acetabulum, the condition of the lumbar spine should be considered. Posterior luxation is discussed as well; the authors recommend prudence in the indication for THR operations with lowering of the acetabulum shell.
The author discusses all the elements which should be considered in the decision for surgical treatment of CDH in adults: precise evaluation of the dysplasia, age of the patient, significance of the secondary osteoarthritis and good knowledge of the results of the proposed operation. After a shelf operation there are good results in 85% of the cases for an average of 13 years. After varisation osteotomy with a good joint for a femoral, acetabular or combined displacement, in patients aged 30 years or less, the results are good in 95% of the cases for 20 years. Varisation osteotomy, combined with a shelf procedure, increases the efficacity of the operation, especially in cases of major dysplasia of the acetabulum. There are good results in 97% of hips without osteoarthritis for more or less 20 years. The results of valgisation osteotomy are most disappointing after more than 10 years, with bad results in 50% of the cases. The Chiari osteotomy gives good results early, but after 10 years the fraction of good results drops to only 66% and there is a further decrease in the efficacity after 12 years. The peri-acetabular osteotomy of Ganz is a very logical operation, but the follow-up is too short and the technique is not easy. Total hip replacement is still indicated in many cases; there should be a very thorough preoperative evaluation, and the positioning of the cup should allow for the acetabular dysplasia.
The authors report their experience with US of the hip in 200 children aged 9 days to 8 months. All the children previously were under-gone physical examination. The sonographic study was carried out with Graf's method. The clinical-sonographic correlation proves the utility of US as a screening method able to show early morphological and functional alterations in the hip. US is thus suggested as a valid alternative to conventional methods to use in those cases where either plastering or surgery is required.
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