A cross-sectional study of 204 hip radiographs of high risk CDH (Congenital Dislocation of the Hip) group newborn, using: (1) The Tonnis critenrion of acetabular index upper limit 35 degrees. (2) The position of femoral metaphyseal "beak" with Perkins and Hilgenreiner's lines, showed: 21 CDH/204 risk newborn or 10.24% with 7.35% Dislocatable Hip, 2.93% Complete Dislocation; Female = 9.5:1; Left side: Right side=3:2.
Hip Dislocation, Congenital ; diagnosis ; epidemiology

Hip Dislocation, Congenital ; Humans ; Hyperplasia ; Infant, Newborn

Arthroplasty, Replacement, Hip ; Hip Dislocation, Congenital ; surgery ; Humans

Hip Dislocation, Congenital ; Hip Joint ; Humans ; Infant, Newborn ; Neonatal Screening

Combined procedue of open reduction and shortening of femur for treatment of congenital hip dislocation in the older child is known to minmize the incidence of avascular necrosis, redislocation and stiffness. Thirty six hips in thirty three children were operated upon in the past six years with combined procedue of open reduction and shortening of femur. And twenty eight hips in twenty five children who were followed up more than one year were analysed. By the results, we obtained excellent in twenty nine percent, good in fifty three percent, fair in fourteen percent and poor in four percent.
Child ; Dislocations ; Femur ; Hip Dislocation, Congenital ; Hip ; Humans ; Incidence ; Necrosis

Developmental dysplasia of the hip (DDH) is a major cause of hip arthritis and ultimately total hip arthroplasty. Due to the dysplastic acetabulum, how to place the acetabular cup becomes a challenge in acetabular reconstruction for such patients. Especially in the acetabula classified as Crowe typeⅡand type Ⅲ, the dislocation of the femoral head causes bone defects above the true acetabulum, which will affect the stability of the acetabular cup when the acetabular reconstruction is performed at the true acetabulum. Many acetabular reconstruction methods such as bone grafting, the use of small acetabular cups, socket medialization technique, and high hip center technique are used to increase the host bone coverage of the cup. However, each method has its own shortcomings that can not be ignored so that there is no unified conclusion on the acetabular reconstruction methods for Crowe typeⅡand type Ⅲ hip dysplasia. This article summarized and evaluated various reconstruction methods in combination with the acetabular morphology of DDH, and put forward the research direction in the future.
Acetabulum/surgery* ; Arthroplasty, Replacement, Hip ; Developmental Dysplasia of the Hip ; Hip Dislocation/surgery* ; Hip Dislocation, Congenital/surgery* ; Hip Prosthesis ; Humans ; Treatment Outcome

Epidemiological studies have confirmed that genetic factors play an important role in the incidence of developmental dysplasia of the hip (DDH). Previous studies showed that genetic factors accounted for a major part (about 67.88%), the remaining part was due to the environmental factors. At present, great progress has been made in the researches of the diagnosis and treatment of DDH, but there is no clear conclusion in the genetic etiology. This article reviews the latest studies of candidate genes and their mapping.
Female ; Hip Dislocation, Congenital ; diagnosis ; genetics ; therapy ; Humans ; Male ; Pedigree

OBJECTIVETo investigate the effects of periacetabular osteotomy (PAO) for developmental dysplasia of the hip in adolescent.

METHODSTwelve hips in 9 adolescent patients who underwent a Bernese periacetabular osteotomy for symptomatic or asymptomatic developmental dysplasia of the hip were analyzed. The average age of the patients at the time of surgery was 12.9 years(11-14 years). The Harris hip score and overall patient satisfaction with surgery were used to assess hip function and clinical results. Plain radiographs were used to assess the correction of the deformity and to observe progression of degenerative changes.

RESULTSThe average duration of clinical follow-up was 88.5 (60-136) months. The mean Harris hip score increased from 89 ± 6 preoperatively to 97 ± 3 at the time of the most recent follow-up (t = -6.754, P = 0.000). All patients (12 hips) had an excellent clinical result. The lateral center-edge angle of Wiberg increased from 4° ± 13° preoperatively to 36° ± 7° at the time of the most recent follow-up (t = -11.677, P = 0.000). The acetabular roof obliquity decreased from 28° ± 10° preoperatively to 2° ± 8° at the time of the most recent follow-up (t = 9.038, P = 0.000). The acetabular-head index increased from 54% ± 11% preoperatively to 89% ± 13% at the time of the most recent follow-up (t = -11.137, P = 0.000). The hip center was translated medially. Improvement of cystic degeneration of the acetabulum were found in 4 hips. Remodeling of aspherical uncongruence were found in 5 cases. Crossing sign were found in 2 hips postoperatively without symptoms of impingement.

CONCLUSIONSPAO can provide comprehensive deformity correction and improve hip function in treatment of developmental dysplasia of the hip in adolescence. Some of the patients have improvement of cystic degeneration and remodeling of the hip.

Acetabulum ; pathology ; Adolescent ; Child, Preschool ; Disease Progression ; Hip Dislocation ; surgery ; Hip Dislocation, Congenital ; Humans ; Osteotomy ; Postoperative Period

Arthroplasty, Replacement, Hip ; Bone Transplantation ; Femur ; surgery ; Hip Dislocation, Congenital ; diagnosis ; surgery ; Humans

Arthroplasty, Replacement, Hip ; Hip Dislocation, Congenital ; classification ; diagnosis ; therapy ; Humans ; Osteotomy