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PubMedDate not supplied

[Results of the treatment of congenital hip dislocation using Salter's open repositioning and pelvic osteotomy].

In this paper the results of Salter's innominate osteotomy combined with an open reduction are shown on the basis of radiographic and clinical investigations. From 1969-1976 43 hips up to the age of 3.11 years had been treated after Salter's method. At the follow-up 65.6% of the hips were found to have normal or slightly pathological AC angles. 63.4% of the hips show good and fair results concerning the ACM angle. The results of the CE angle and the 'hip value' are disappointing: only just 34.1% of the hips can be considered good or fair. This is a consequence of the high rate of preoperative avascular necrosis on the one hand, on the other hand it is based on the fact that most of the cases had had a previous non-operative or operative treatment.

Child↗
PubMed1987

Ultrasonic investigation of the hip in newborns in the diagnosis of congenital hip dislocation: classification and results of a screening program.

The method of ultrasonic examination of the hip is described, the latest updated Graf classification is explained, and the results of a prospective screening program are described. One thousand four hundred and sixty newborn infants were examined by ultrasound and clinically by independent observers. The distribution of the ultrasound types was determined. Recommendations are given for the use of ultrasonic investigation of the hip for groups at risk in the neonatal period.

Female↗
PubMed1990

[Incidence of congenital hip dislocation in 40,243 live births (II)].

We study 1,747 children who presented luxating hip disease evaluating the following parameters: a) Frequency of breach presentation. b) Weight at birth. c) Inheritance. It was observed that out of 1,747 children affected, 159 were by breach presentation, representing 9.10%. With regard to weight, it seems that under-weight babies are more affected than those of average weight. Lastly, we observed greater incidence in patients with a family history of hip dysplasia.

Hip Dislocation, Congenital↗
PubMed2003

Kinematics, kinetics, and finite element analysis of commonplace maneuvers at risk for total hip dislocation.

Dislocation remains a disturbingly frequent complication of total hip arthroplasty (THA). Over the past several years, increasingly rigorous biomechanical approaches have been developed for studying dislocation, both experimentally and computationally. Realism of the input motion challenge data has lagged behind most other aspects of this body of work, and anterior dislocation maneuvers remain unstudied. To enhance realism of biomechanical studies of dislocation, motion data are here reported for ten THA-aged subjects, each repeatedly performing seven maneuvers known to be dislocation-prone. An optoelectronic motion tracking system and a recessed force plate captured the kinematics and ground reaction forces of these maneuvers. Using an established inverse dynamics model to estimate hip joint loading, 354 motion trials were evaluated using an existing finite element model of THA dislocation. Worst-case-scenario THA constructs were simulated (22 mm femoral head, acetabular cup orientations at the limit of the accepted safe zone), in order to deliberately induce impingement and dislocation. The results showed a high incidence of computationally predicted dislocation for all movements studied, but also that risk was very maneuver-dependent, with patients being six times more likely to dislocate from a low-sit-to-stand maneuver than from stooping. These new motion data hopefully will help facilitate systematic efforts to reduce the incidence of dislocation.

Activities of Daily Living↗
PubMed1980

Effect of pelvic inclination on the pathogenesis of congenital hip dislocation.

The relationship of the pelvis, acetabulum, spine and femur was studied in the adult in the newborn. It was noted that when the flexed spine and pelvis derotated at or soon after birth, the femoral head dislocated anteriorly in a number of anatomic preparations, and, in the process of "unfolding," the femoral head assumed the classically recognized dislocated position. The "weak" areas in the fibrocartilaginous makeup are also described.

Acetabulum↗