[TREATMENT OF CONGENITAL HIP DISLOCATION IN THE CHILD].
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Early results of surgical treatment of congential hip dislocation by the Dega method in 18 children (20 hips) aged from 6 to 17 months are presented. Following the excision of the soft tissue obstructions and Dega transiliac osteotomy stable reduction of the hip has been achieved in all cases. Proximal femoral osteotomy has been performed in 6 cases only. Clinical results were markedly superior over radiological ones. Fair radiological outcomes resulted from surgical errors or avascular necrosis of the femoral head due to the previous conservative treatment. Avascular necrosis after operative treatment has not been noted.
The author reports a very unusual association of a traumatic dislocation of the hip with a fracture of the ipsilateral femoral shaft in a five-year-old child. The review of the literature reveals that, in such cases, the dislocation was often missed at first. In the reported case, conservative reduction of the dislocation was not possible and surgical reduction was needed. Closed treatment was applied for the femoral fracture. After a four year follow-up, the child was completely normal with no limb length discrepancy. The orientation of the femoral neck was normal.
Two cases of subcapital fracture associated with hip dislocation, treated with primary uncemented Total Hip Replacement are presented.
To assess the impact of traumatic hip dislocations in the skeletally immature patient, 42 children younger than 16 years of age (average age, 9 years 10 months) who were treated at the authors' institution were studied. Data were collected from charts and radiographs and by completion of questionnaires. The average followup after injury was 10 years 1 month. The majority of dislocations (64%) were attributable to low energy injuries. Ipsilateral fractures about the hip occurred in 17% of patients. Avascular necrosis of the femoral head developed in 12% of patients, with the amount of time spent dislocated being the only statistically proven risk factor. Patients whose reduction was delayed greater than 6 hours had a 20 times higher risk of having avascular necrosis develop compared with patients whose hips were reduced in 6 hours or less. The use of computed tomography for joint asymmetry of 3 mm or greater and omission of bone scan screening were supported by this study. Functional outcomes were very good in this series with 95% of patients suffering mild (usually weather related) or no pain and 95% of patients suffering mild pain (intermittently noticeable) or no limp. A large percentage of the patients (78%) continued to participate in high demand activities such as football, soccer, and basketball.
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Residual dysplasia and iatrogenic osteochondritis are two complications of treatment of congenital dislocation of the hip. Confidence is placed in the use of slow orthopedic reduction with a combined stabilizing Salter's osteotomy. This method was applied in 20 cases while in 10 patients a Salter's operation was performed for confirmed failure of orthopedic therapy. These were cases of severe dislocation, the mean age of the patients when starting treatment being 11 months. The mean age at the last follow-up examination was 5 years, when confirmation was obtained of the excellent clinical result, and particularly the radiographic outcome with normal cotyloid angles and good anterior cover. Pelvic osteotomy when mean age was 22 months produced as near as possible a normal hip before 6 years of age, without altering growth of the surperior extremity of the femur.
We report on 20 own cases of the past 20 years. Traumatic hip dislocation in children, which is a rare event, should be primarily reduced under anaesthesia as quickly as possible. An open reduction is only necessary with the luxatio obturatoria if a sole conservative reduction attempt is unsuccessful. A possible ipsilateral femur shaft fracture must be treated operatively at the same time.
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The early treatment of hip dislocation associated with ipsilateral femoral shaft fracture often causes problems. The authors report the use of a Lardennois hoop apparatus in two cases with a satisfactory primary result.
The newer diagnostic modalities such as computed tomography and magnetic resonance imaging are becoming increasingly used in the evaluation of joint trauma. The combination of computed tomography and arthrography can also be of significant diagnostic value in certain specific situations. In our case report, we describe its use in post-traumatic recurrent hip dislocation and its value, not only in depicting a posterior capsular tear, but also in the diagnosis of an internal joint derangement which may contribute to incongruous reduction of the hip joint.
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The case of a traumatic dislocation of the left hip in a 4-year-old boy is presented. After an initial attempt at reduction under general anesthesia, a permanent deformity in the flexion of the hip remained, and there was radiographic evidence of a nonconcentric reduction. Computed tomography (CT) showed interposition in the posterior part of the joint. Under general anesthesia, the mobilization of the hip reduced the dislocation correctly, removing the necessity of open treatment. This case stresses the need for early diagnosis of this serious complication and closed reduction of the joint, avoiding the poor results of open and deferred treatments.