Search Our Scientific Publications & Authors

Zhonghua Er Ke Za Zhi 2019 Feb;57(2):136-141

Department of Neurology, Children's Hospital, Capital Institute of Pediatrics, Beijing 100020, China.

To summarize the clinical manifestations and determine the molecular etiology for two collagen type Ⅵ-related myopathy pedigrees. Two spontaneous collagen type Ⅵ-related myopathy patients were admitted to Department of Neurology, Children's Hospital, Capital Institute of Pediatrics in October 2017. Clinical data of probands and their family members were collected and their genomic DNA was obtained for genetic testing. Read More

Comput Methods Biomech Biomed Engin 2019 Jan 20:1-12. Epub 2019 Jan 20.

a Department of Mechanical Engineering and Materials Science , Washington University in St Louis , St Louis , MO , USA.

Optimizing the geometric complexity of musculoskeletal models is important for reliable yet feasible estimation of joint biomechanics. This study investigated the effects of subject-specific model geometry on hip joint reaction forces (JRFs) and muscle forces in patients with developmental dysplasia of the hip (DDH) and healthy controls. For nine DDH and nine control subjects, three models were created with increasingly subject-specific pelvis geometry, hip joint center locations and muscle attachments. Read More

J Orthop Res 2019 Jan 17. Epub 2019 Jan 17.

Program in Physical Therapy, Washington University School of Medicine in St. Louis, St. Louis, Missouri.

Although increasing evidence suggests that abnormal femur geometry in developmental dysplasia of the hip (DDH) may contribute to intra-articular damage and the development of hip osteoarthritis, a comprehensive 3D description of femoral abnormalities in DDH remains incomplete. Statistical shape modeling (SSM) was used to quantify three-dimensional (3D) geometric variation among femurs in female patients with DDH and control subjects. SSM correspondence points (n = 8,192) were placed on each femur using a gradient descent energy function to derive mean DDH and control femoral shapes and principal component analysis (PCA) was then used to describe shape variation. Read More

Medicine (Baltimore) 2019 Jan;98(3):e14054

Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China.

To review the value of acetabular magnetic resonance imaging (MRI) in children with developmental dysplasia of the hip (DDH) of different ages.Eighty-eight medical records of children with unilateral DDH who were diagnosed and treated in our hospital between January 2010 and December 2015 were retrospectively analyzed. The affected hips were put into the case group, and the normal hips were put into the control group. Read More

Medicine (Baltimore) 2019 Jan;98(2):e14081

University of Medicine, Pharmacy, Sciences and Technology of Târgu Mureş, Târgu Mureş, Romania.

Developmental dysplasia of the hip (DDH) is one of the most common congenital abnormalities of the musculoskeletal apparatus in newborns. The aim of this study was to analyze the contribution of ultrasonography in the detection of DDH in newborns and infants, identifying the regional incidence of this pathology in the central area of Romania, emphasizing the risk factors that underlie DDH etiopathogenicity.This article represents a retrospective study of 847 newborns and infants examined in the Imagistic Department of a medical center from the central area of Romania, between January 1 and December 31, 2016. Read More

J Child Orthop 2018 Dec;12(6):606-613

Department of Orthopaedics & Traumatology, Chinese University of Hong Kong, Shatin, Hong Kong.

Purpose: Prospective randomized controlled trials and long-term studies are essential future directions for building -evidence-based practices in developmental dysplasia of the hip (DDH), however, sufficient attrition in data (> 20%) can introduce bias deteriorating research quality. Pelvic radiography is synonymous with DDH assessment and so are -Gonadal Shield (GS) recommendations with pelvic radiography. -Nonetheless, losses to diagnostic information and inadequate protection have been increasingly implicated to GS usage, with significantly worse implications in female patients. Read More

J Orthop Res 2019 Jan 3. Epub 2019 Jan 3.

Department of Radiology and Diagnostic Imaging, University of Alberta, 2A2.41 WMC, 8440-112 Street, Edmonton, Alberta, T6G 2B7, Canada.

In dysplastic infant hips undergoing abduction harness treatment, cartilage contact pressure is believed to have a role in therapeutic cartilage remodeling and also in the complication of femoral head avascular necrosis. To improve our understanding of the role of contact pressure in the remodeling and the complication, we modeled cartilage contact pressure in cartilaginous infant hips undergoing Pavlik harness treatment. In subject-specific finite element modeling, we simulated contact pressure of normal and dysplastic hips in Pavlik harness at 90° flexion and gravity-induced abduction angles of 40°, 60° and 80°. Read More

Clujul Med 2018 Oct 30;91(4):422-426. Epub 2018 Oct 30.

Radiology Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania.

Background And Aim: Developmental dysplasia of the hip (DDH) is a potentially disabling disease. There are many diagnostic approaches, Graf method ultrasonography being the most popular imaging method. Although considered as a healthy condition, the existence of hips at the 60 degree limit or the asymmetries higher than 4 degrees between left and right side may be a source of unfavorable evolution and consequently of late diagnosed dysplasia cases. Read More

World J Clin Cases 2018 Nov;6(14):830-835

Department of Orthopedics, the Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou 215002, Jiangsu Province, China.

Background: Osteofibrous dysplasia (OFD) is a developmental skeletal disorder, and cases with a giant affected area in the pelvis are rare.

Case Summary: In this case report, a 48-year-old man presented with a large tumor in the right iliac region that turned out to be OFD. The patient had rebound tenderness in his right hip. Read More

Medicine (Baltimore) 2018 Nov;97(48):e13519

Rationale: Curved periacetabular osteotomy (CPO) is a procedure with excellent surgical outcome that has been proposed for patients with development dysplasia of the hip (DDH). However, the surgical outcomes depend on the surgeon's experience and proficiency.

Patient Concerns: A 38-year-old female indicated she was experiencing left hip pain while walking. Read More

Bone Joint J 2018 Dec;100-B(12):1551-1558

Department of Orthopedic Surgery, University of Kentucky, Lexington, Kentucky, USA.

Aims: The aims of this study were to review the surgical technique for a combined femoral head reduction osteotomy (FHRO) and periacetabular osteotomy (PAO), and to report the short-term clinical and radiological results of a combined FHRO/PAO for the treatment of selected severe femoral head deformities.

Patients And Methods: Between 2011 and 2016, six female patients were treated with a combined FHRO and PAO. The mean patient age was 13. Read More

Zhongguo Gu Shang 2018 Oct;31(10):922-926

Puyang Oil Field General Hospital, Puyang 457001, Henan, China.

Objective: To evaluate clinical outcomes of acetabular cup position on high hip and anatomical position in total hip arthroplasty for Crowe III developmental dysplasia of hip joint.

Methods: Forty-six patients(58 hips) treated with high hip center THA from January 2010 to December 2015, including 6 males (8 hips) and 40 females(50 hips) aged from 40 to 70 years old with an average of(54.3±7. Read More

Nihon Hoshasen Gijutsu Gakkai Zasshi 2018 ;74(10):1163-1169

Department of Radiology, Saitama Prefecture Saiseikai Kurihashi Hospital.

Radiographic images of the hip joint can include a false profile view when the foot of the affected side is positioned parallel to the detector plane and the pelvic rotation angle is 65°. However, to the best of our knowledge, pelvic rotation angle has yet to be adequately investigated. The present study aimed to improve radiographic imaging reproducibility by testing pelvic rotation angles using the pubic symphysis and greater trochanter as a guide. Read More

J Pediatr Orthop 2019 Mar;39(3):e159-e164

Department of Orthopedic Surgery University of California.

Background: Children with developmental dysplasia of the hip may require a pelvic osteotomy to treat acetabular dysplasia. Three osteotomies are commonly performed in these patients (Pemberton, Dega, and San Diego), though comparative studies of each are limited. The purpose of this study was to compare changes in acetabular morphology (acetabular version, volume, and octant coverage angles) created by these 3 osteotomies using matched patient-specific 3D-printed pelvic models. Read More

Bone Joint J 2018 Oct;100-B(10):1399-1404

Department of Orthopaedics, Medical University of Innsbruck, Innsbruck, Austria.

Aims: The purpose of this study was to analyze the incidence of the different ultrasound phenotypes of developmental dysplasia of the hip (DDH), and to determine their subsequent course.

Patients And Methods: A consecutive series of 28 092 neonates was screened and classified according to the Graf method as part of a nationwide surveillance programme, and then followed prospectively. Abnormal hips were followed until they became normal (Graf type I). Read More

World J Gastroenterol 2018 Sep;24(36):4208-4216

Department of Hepatology, Children's Hospital of Fudan University, Shanghai 201102, China.

Interstitial lung and liver disease (ILLD) is caused by biallelic mutations in the methionyl-tRNA synthetase () gene. To date, no genetic changes other than missense variants were reported in the literature. Here, we report a five-month old female infant with typical ILLD (failure to thrive, developmental delay, jaundice, diffuse interstitial lung disease, hepatomegaly with severe steatosis, anemia, and thrombocytosis) showing novel phenotypes such as kidney stones, acetabular dysplasia, prolonged fever, and extreme leukocytosis. Read More

J Orthop Sci 2019 Jan 20;24(1):166-169. Epub 2018 Sep 20.

Department of Pediatric Orthopedic Surgery, Jichi Children's Medical Center Tochigi, 3311-1 Yakushiji, Shimotsuke, Tochigi, 329-0498, Japan.

Background: The ossification center of the femoral head reportedly appears at 7-8 months in 95% infants in the radiographs, but its appearance often delays in Japanese normal infants. The purpose of this study was to survey the age at appearance of the femoral head in the radiographs, evaluate the normal standards of its appearance in Japanese infants, and determine whether the acetabular state affects the time of its appearance.

Materials And Methods: The patients comprised 436 infants consulted with our institution because of a limitation of abduction in flexion (LA), acetabular dysplasia, or suspected developmental dysplasia of the hip (DDH). Read More

J Orthop Surg Res 2018 Sep 15;13(1):236. Epub 2018 Sep 15.

Department of Orthopedics, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University, No. 600 Yishan Road, Xuhui District, Shanghai, 201306, China.

Background: Acetabular dysplasia is the most common cause of secondary arthritis of the hip joint. Achieving maximum restoration of the acetabular coverage and medialization of the femoral head remains difficult with the original Steel triple pelvic osteotomy for acetabular dysplasia in children and adults. This study intended to answer the following questions: (1) Are the midterm functional results of our modified procedure favorable, particularly in relation to Harris scores? and (2) On the basis of the Tönnis grade, does this procedure has a different effect on radiographic parameters and functional results at midterm follow-up?

Methods: This study included 26 consecutive adult patients with symptomatic acetabular dysplasia (28 hips) who underwent modified triple pelvic osteotomy through two incisions between July 2005 and June 2012. Read More

J Am Acad Orthop Surg 2019 Jan;27(2):68-74

From the Center for Excellence in Hip Disorders, Texas Scottish Rite Hospital for Children, Texas Scottish Rite Hospital for Children, Dallas, TX.

Introduction: No clear practice guideline exists for the management of stable hip with ultrasonic dysplasia (UD). This study assessed the treatment patterns for stable UD and determined the outcomes of Pavlik harness (PH) treatment or observation (OB).

Methods: This is a prospective study of 80 infants (107 hips) aged ≤12 weeks at presentation diagnosed with stable UD. Read More

Bone Joint J 2018 09;100-B(9):1249-1252

Department of Trauma and Orthopaedic Surgery, Morriston Hospital, Swansea, UK.

Aims: The significance of the 'clicky hip' in neonatal and infant examination remains controversial with recent conflicting papers reigniting the debate. We aimed to quantify rates of developmental dysplasia of the hip (DDH) in babies referred with 'clicky hips' to our dedicated DDH clinic.

Patients And Methods: A three-year prospective cohort study was undertaken between 2014 and 2016 assessing the diagnosis and treatment outcomes of all children referred specifically with 'clicky hips' as the primary reason for referral to our dedicated DDH clinic. Read More

Eur Radiol 2019 Mar 29;29(3):1489-1495. Epub 2018 Aug 29.

Department of Radiology and Diagnostic Imaging, 2A2.41 WC Mackenzie Health Sciences Centre, University of Alberta, 8440-112 Street, Edmonton, AB, T6G 2B7, Canada.

Purpose: Developmental dysplasia of the hip (DDH) diagnosis by two-dimensional ultrasound (2DUS) can have poor inter-rater reliability. 3D ultrasound (3DUS) may be more reliably performed, particularly by novice users. We compared intra- and inter-rater reliability between expert and novice operators performing 2DUS and 3DUS for DDH. Read More

J Dev Behav Pediatr 2018 Sep;39(7):591-593

Division of Developmental Behavioral Pediatrics, University of Michigan Medical School, Ann Arbor, MI.

Case: Andrew is a 17-year-old male with trisomy 21, commonly known as Down syndrome, and accompanying severe intellectual disability who presents to your primary care office with his father for the first time to establish care and assistance with transition. Andrew has a history of a complete atrioventricular canal that was repaired as an infant and poorly controlled infantile spasms. Currently, he struggles with constipation, esophageal strictures, medullary nephrocalcinosis, urinary retention, sleep dysregulation, G-tube dependency, and hip dysplasia. Read More

Pediatr Radiol 2018 12 28;48(13):1971-1974. Epub 2018 Jul 28.

Department of Orthopedic Surgery, Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE, USA.

A developmental dysplasia of the hip (DDH) case treated by closed reduction and casting and subsequently confirmed to have avascular necrosis (AVN) was retrospectively noted to have an abnormal pattern of echogenicity in the femoral head on sonograms obtained within 1.5 months of surgery. Patchy increased echogenicity in parts of the unossified cartilage replaced the normal pattern of central coalescence of vessels described with development of the ossification center. Read More

Br J Radiol 2018 Dec 7;91(1092):20180474. Epub 2018 Aug 7.

1 Department of Radiology, UT South western Medical Center , Dallas, TX , USA.

Objective:: Femoroacetabular impingement (FAI) and hip dysplasia (HD) are frequently evaluated by isotropic CT (3DCT) for preoperative planning at the expense of radiation. The aim was to determine if isotropic MRI (3DMR) imaging can provide similar quantitative and qualitative morphological information as 3DCT.

Methods:: 25 consecutive patients with a final diagnosis of FAI or HD were retrospectively selected from December 2016-December 2017. Read More

J Biomech 2018 Sep 20;78:1-9. Epub 2018 Jul 20.

Department of Bioengineering, Imperial College London, London, UK. Electronic address:

Fetal kicking and movements generate biomechanical stimulation in the fetal skeleton, which is important for prenatal musculoskeletal development, particularly joint shape. Developmental dysplasia of the hip (DDH) is the most common joint shape abnormality at birth, with many risk factors for the condition being associated with restricted fetal movement. In this study, we investigate the biomechanics of fetal movements in such situations, namely fetal breech position, oligohydramnios and primiparity (firstborn pregnancy). Read More

Chin J Traumatol 2018 Aug 26;21(4):238-242. Epub 2018 Mar 26.

Department of Orthopedic, Chongqing Children's Hospital, Chongqing Medical University, Chongqing, 400014, China. Electronic address:

Developmental dysplasia of the hip (DDH) is one of the most common congenital disorders in childhood. Its diverse pathological changes require different treatments and result in different outcomes. Although many studies have been conducted on DDH, some special pathology is still unrecognized. Read More

BMJ Case Rep 2018 Jul 3;2018. Epub 2018 Jul 3.

Trauma and Orthopaedics, Worcester Royal Hospital, Worcester, UK.

Apert syndrome is a rare congenital disorder characterised by craniosynostosis, midface hypoplasia and syndactyly of hands and feet. Here we present a case of a 44-year-old woman, with a genetic diagnosis of Apert syndrome from birth, who presented with symptomatic left-sided hip osteoarthritis secondary to femoral abnormalities. She proceeded to have a total hip replacement. Read More

Arch Orthop Trauma Surg 2018 Nov 3;138(11):1495-1499. Epub 2018 Jul 3.

Department of Orthopaedic Surgery, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0374, Japan.

Introduction: The significance of the relationship between the spine and hip joints has been frequently discussed. However, the relationship between acetabular coverage and spinal sagittal alignment has not been fully elucidated as previous studies did not adequately control for factors that might affect the spinopelvic alignment. The aim of this study was to elucidate the impact of acetabular coverage on spinal sagittal alignment by comparing patient groups matched on sex, age, and the presence of hip and anterior impingement pain. Read More

J Orthop Sci 2018 Sep 19;23(5):788-792. Epub 2018 Jun 19.

Division of Orthopedic Surgery, Department of Regenerative and Transplant Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.

Background: The purpose of this study is to measure pelvic morphology with respect to the pelvic incidence, pelvic tilt, and sacral slope using 3-dimensional measurement and to compare the pelvic morphology between the normal population and women with developmental dysplasia of the hip (center-edge angle, <25°). We hypothesized that the relationship between pelvic incidence, anatomical pelvic tilt, and anatomical sacral slope would be different between normal subjects and patients with developmental dysplasia of the hip.

Methods: We evaluated 61 healthy women without low back or knee pain and 71 patients with developmental dysplasia of the hip. Read More

Int Orthop 2018 Jun 21. Epub 2018 Jun 21.

Pediatric Orthopedic Department, Guangzhou Women and Children's Medical Center, 9th Jinsui Road, Guangzhou, 510623, China.

Purpose: Closed reduction and spica cast immobilization are routinely used for young patients with developmental dysplasia of the hip with reducible hips. Our primary objective was to assess the interpretation quality of immediate post-operative pelvis radiographs after treatment.

Methods: A series of 28 randomly selected patients (30 hips) with pre- and post-operative pelvis radiographs and post-operative magnetic resonance imaging were included. Read More

J Pediatr Orthop 2018 Sep;38(8):e440-e445

Division of Orthopaedic Surgery.

Background: It has been suggested that the femoral head can "dock" deeper into the acetabulum after initial closed reduction (CR) for developmental dysplasia of the hip (DDH). The purpose of this study was to quantify the interval change in femoral head position between immediate postoperative magnetic resonance imaging (MRI) and follow-up imaging at ~3 weeks.

Methods: A retrospective review of 29 patients (30 hips) who underwent CR and spica casting for DDH was conducted. Read More

Ann R Coll Surg Engl 2018 Sep 18;100(7):566-569. Epub 2018 Jun 18.

Abertawe Bro Morgannwg University Health Board , UK.

Introduction In 2014 our centre started a dedicated clinic for developmental dysplasia of the hip (DDH). The aim of the clinic was to streamline DDH referrals, enabling timely review, imaging and multidisciplinary treatment. Ongoing audit has been carried out based on the UK National Screening Committee newborn and infant physical examination (NIPE) guidelines, first published in 2008. Read More

J Pediatr Orthop B 2018 Nov;27(6):479-484

Department of Orthopedic and Trauma Surgery, Alicante University Hospital, Miguel Hernández University, Elche, Spain.

Our purpose is to analyze results, following the use of arthrodiastasis for the treatment of inveterate congenital hip dislocations. The study included eight patients. The mean age was 6 years. Read More

J Pediatr Orthop 2018 Jul;38 Suppl 1:S21-S27

Shriners Hospitals for Children Northern California, Sacramento, CA.

Optimal clinical decision making and surgical management of hip dysplasia in children with cerebral palsy (CP) requires an understanding of the underlying pathophysiology (pathomechanics and pathoanatomy), incidence, and natural history. The incidence of hip dysplasia in children with CP is directly related to the degree of motor impairment. A subluxated or dislocated hip in a child with CP can compromise the quality of life for both the child and their caregivers. Read More

Int J Comput Assist Radiol Surg 2018 Dec 6;13(12):2021-2028. Epub 2018 Jun 6.

Department of Orthopaedics, Aarhus University Hospital, Tage-Hansensgade 2, 8000, Aarhus C, Denmark.

Background: Periacetabular osteotomy (PAO) is the treatment of choice for younger patients with developmental hip dysplasia. The procedure aims to normalize the joint configuration, reduce the peak-pressure, and delay the development of osteoarthritis. The procedure is technically demanding and no previous study has validated the use of computer navigation with a minimally invasive transsartorial approach. Read More

Bone Joint J 2018 Jun;100-B(6):822-827

Department of Orthopedic Surgery, Wilhelmina Children's Hospital, University Medical Center, Utrecht, The Netherlands.

Aims Open reduction is required following failed conservative treatment of developmental dysplasia of the hip (DDH). The Ludloff medial approach is commonly used, but poor results have been reported, with rates of the development of avascular necrosis (AVN) varying between 8% and 54%. This retrospective cohort study evaluates the long-term radiographic and clinical outcome of dislocated hips treated using this approach. Read More

Bone Joint J 2018 06;100-B(6):806-810

Department of Trauma and Orthopaedics, Royal Blackburn Teaching Hospital, East Lancashire Hospitals NHS Trust. University of Central Lancashire, Blackburn, Lancashire, UK.

Aims: The aim of this prospective cohort study was to evaluate the effectiveness of the neonatal hip instability screening programme.

Patients And Methods: The study involved a four-year observational assessment of a neonatal hip screening programme. All newborns were examined using the Barlow or Ortolani manoeuvre within 72 hours of birth; those with positive findings were referred to a 'one-stop' screening clinic for clinical and sonographic assessment of the hip. Read More

J Pediatr Orthop B 2018 Nov;27(6):485-490

Department of Pediatric Orthopedics, Chang Gung Memorial Hospital, Chang Gung University, Taoyuan, Taiwan.

This study reported guided growth for caput valgum deformity and subsequent hip development. Ten children with unilateral hip dysplasia had guided growth by one eccentric transphyseal screw at age 9.1 years with minimum 2 years of follow-up. Read More

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2018 Jan;32(1):20-24

Department of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041,

Objective: To explore the surgical technique and effectiveness of autologous femoral head bone graft in total hip arthroplasty (THA) for Crowe type Ⅲ developmental dysplasia of the hip (DDH) with acetabular bone defect.

Methods: Between July 2012 and September 2015, 12 cases (12 hips) of Crowe type Ⅲ DDH with acetabular bone defect were included. Of the 12 patients, 2 were male and 10 were female, with an average age of 54. Read More

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2018 Apr;32(4):389-393

Department of Orthopaedics, the First Affiliated Hospital of Soochow University, Suzhou Jiangsu, 215006, P.R.China.

Objective: To explore the mid-term effectiveness of large-head metal-on-metal total hip arthroplasty (THA).

Methods: A retrospective analysis was made on the clinical date of 40 patients (43 hips) who were treated with the large-head metal-on-metal THA between April 2009 and June 2010. There were 18 males (20 hips) and 22 females (23 hips) with an average age of 55. Read More

J Surg Orthop Adv Spring 2018;27(1):58-63

Department of Orthopaedics, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania.

Alternative medicine in pediatrics is expanding, with chiropractic now a common choice for families seeking alternative medical care. Currently, there is sparse information in the literature exploring the role of chiropractic in orthopaedic pathology. The objective of this case series is to present pediatric patients who received treatment from chiropractors and orthopaedic physicians as well as to review the respective existing research. Read More

Arch Orthop Trauma Surg 2018 Aug 4;138(8):1059-1067. Epub 2018 May 4.

Department of Orthopaedic Surgery, Aarhus University Hospital, Tage-Hansens Gade 2, 8000, Aarhus C, Denmark.

Introduction: Hip dysplasia is characterized by reduced acetabular coverage of the femoral head leading to an increased mechanical load on the hip joint and the acting hip muscles. Potentially, the muscles and tendons functioning close to the hip joint may present with overuse-related ultrasonography findings. The primary aim was to report the prevalence of muscle-tendon-related abnormalities detected by ultrasonography in 100 patients with symptomatic hip dysplasia. Read More

J Pediatr Orthop 2018 Jul;38(6):e305-e311

Pediatric Orthopedics, British Columbia Children's Hospital, Vancouver, BC, Canada.

Background: The purposes of this study were to (1) perform a systematic review of articles that reported agreement or reproducibility in repeated diagnosis of developmental dysplasia of the hip (DDH) using ultrasound imaging, (2) estimate the reproducibility in the available dysplasia metrics, and (3) compare reproducibility of the available dysplasia metrics.

Methods: A systematic review of the Medline and Embase databases was performed by using a search strategy formulated from our research question: "For infants at risk of DDH, are US imaging-based diagnoses reproducible?" Two reviewers independently identified articles for inclusion in the systematic review, and then assessed the quality of the included studies using the Guidelines for Reporting Reliability and Agreement Studies guideline. Variability and agreement-related statistics in the included studies were extracted and included in a meta-analysis for summarizing the available statistics. Read More

J Pediatr Orthop 2018 Aug;38(7):e377-e381

Department of Orthopaedic Surgery, University of Tsukuba, Tsukuba Pediatric Orthopaedic Group, Tsukuba.

Background: Previous reports on patients with developmental dysplasia of the hip (DDH) showed that the prereduced femoral head was notably smaller and more nonspherical than the intact head, with growth failure observed at the proximal posteromedial area. We evaluated the shape of the femoral head cartilage in patients with DDH before and after reduction, with size and sphericity assessed using 3-dimensional (3D) magnetic resonance imaging (MRI).

Methods: We studied 10 patients with unilateral DDH (all female) who underwent closed reduction. Read More

J Orthop Surg Res 2018 May 2;13(1):105. Epub 2018 May 2.

Department of Orthopedic Surgery, Niigata University Medical and Dental Hospital, Niigata, 9518510, Japan.

Background: We previously described that the anteroposterior (AP) axis of the tibia is approximately perpendicular to the transverse axis of the anterior pelvic plane (APP) in the standing position in healthy subjects. The purpose of this study was to investigate the rotational alignment between the APP and clinical epicondylar axis and the AP axis of the tibia relative to pelvic coordination in the standing position in normal subjects and in women with developmental dysplasia of the hip (DDH) to aid decision making for surgeons in the alignment of implants in total hip or knee arthroplasty.

Methods: This study included 77 Japanese women. Read More

J Biomech Eng 2018 Jul;140(7)

Assistant Professor Department of Radiology and Diagnostic Imaging, University of Alberta, 2A2.41 WMC, 8440-112 Street, Edmonton, AB T6G 2B7, Canada e-mail: .

Developmental dysplasia of the hip (DDH) in infants under 6 months of age is typically treated by the Pavlik harness (PH). During successful PH treatment, a subluxed/dislocated hip is spontaneously reduced into the acetabulum, and DDH undergoes self-correction. PH treatment may fail due to avascular necrosis (AVN) of the femoral head. Read More

Bone Joint J 2018 05;100-B(5):675-679

Royal Blackburn Teaching Hospital, East Lancashire Hospitals NHS Trust and University of Central Lancashire, Preston, UK.

Aims: The aim of this study was to identify the association between asymmetrical skin creases of the thigh, buttock or inguinal region and pathological developmental dysplasia of the hip (DDH).

Patients And Methods: Between 1 January 1996 and 31 December 2016, all patients referred to our unit from primary or secondary care with risk factors for DDH were assessed in a "one stop" clinic. All had clinical and sonographic assessment by the senior author (RWP) with the results being recorded prospectively. Read More

Pediatr Radiol 2018 08 25;48(8):1096-1100. Epub 2018 Apr 25.

E.B. Singleton Department of Pediatric Radiology, Texas Children's Hospital, 6701 Fannin St., Suite 470, Houston, TX, 77030-2399, USA.

Background: Magnetic resonance imaging (MRI) of the hips is being increasingly used to confirm hip reduction after surgery and spica cast placement for developmental dysplasia of the hip (DDH).

Objective: To review a single institutional experience with post-spica MRI in children undergoing closed or open hip reduction and describe the utility of MRI in directing the need for re-intervention.

Materials And Methods: Seventy-four patients (52 female, 22 male) who underwent post-spica hip MRI over a 6-year period were retrospectively reviewed. Read More

Radiology 2018 06 24;287(3):1003-1015. Epub 2018 Apr 24.

From the Department of Radiology and Diagnostic Imaging, WC Mackenzie Health Sciences Centre, University of Alberta, 8440-112 St, 2A2.41 Edmonton, AB, Canada T6G 2B7 (D.Z., A.H., E.M., M.M., S.K.D., J.L.J.); Division of Orthopedic Surgery, The Children's Hospital of Philadelphia, Philadelphia, Pa (S.P.); Department of Computing Science, MacEwan University, Edmonton, Canada (D.C.); Department of Medical Imaging, Royal Children's Hospital, Melbourne, Australia (P.R.); and Department of Diagnostic Imaging, National University Hospital, Singapore (J.K.).

Purpose To validate accuracy of diagnosis of developmental dysplasia of the hip (DDH) from geometric properties of acetabular shape extracted from three-dimensional (3D) ultrasonography (US). Materials and Methods In this retrospective multi-institutional study, 3D US was added to conventional two-dimensional (2D) US of 1728 infants (mean age, 67 days; age range, 3-238 days) evaluated for DDH from January 2013 to December 2016. Clinical diagnosis after more than 6 months follow-up was normal (n = 1347), borderline (Graf IIa, later normalizing spontaneously; n = 140) or dysplastic (Graf IIb or higher, n = 241). Read More

Saudi Med J 2018 Apr;39(4):342-346

Department of Orthopedics and Traumatology, Foshan Hospital of Traditional Chinese Medicine, Guangdong Province, China. E-mail.

Objectives: To assess the effects of a technique of cup blocking screws combined with impaction bone grafting during total hip arthroplasty (THA) for patients with developmental dysplasia of the hip (DDH).

Methods: From August 2011 to July 2015, 53 patients (59 hips) with DDH in our hospital were treated with THA using the technique of cup blocking screws combined with impaction particulate bone grafting. These patients were prospectively followed, and the clinical and imaging results were collected. Read More