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https://www.readbyqxmd.com/read/28925669/lower-extremity-abnormalities-in-children
#1
Caitlyn M Rerucha, Caleb Dickison, Drew C Baird
Leg and foot problems in childhood are common causes of parental concern. Rotational problems include intoeing and out-toeing. Intoeing is most common in infants and young children. Intoeing is caused by metatarsus adductus, internal tibial torsion, and femoral anteversion. Out-toeing is less common than intoeing and occurs more often in older children. Out-toeing is caused by external tibial torsion and femoral retroversion. Angular problems include genu varum (bowleg) and genu valgum (knock knee). With pes planus (flatfoot), the arch of the foot is usually flexible rather than rigid...
August 15, 2017: American Family Physician
https://www.readbyqxmd.com/read/28917617/change-in-acetabular-cup-orientation-from-supine-to-standing-position-and-its-effect-on-wear-of-highly-crosslinked-polyethylene
#2
Matthew G Teeter, Prateek Goyal, Xunhua Yuan, James L Howard, Brent A Lanting
BACKGROUND: The purpose of this study is to measure acetabular cup position and wear of the highly crosslinked polyethylene liner in the supine and standing position for patients at a minimum of 10 years after the operation. METHODS: A total of 38 patients were recruited at a mean of 12.5 years after the operation. All patients received a single acetabular cup design with a highly crosslinked liner and a 28-mm cobalt-chromium femoral head. Patients underwent supine and standing radiostereometric examinations in which the X-ray sources and detectors were positioned to obtain an anterior-posterior and cross-table lateral radiograph...
August 31, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28906308/is-contralateral-templating-reliable-for-establishing-rotational-alignment-during-intramedullary-stabilization-of-femoral-shaft-fractures-a-study-of-individual-bilateral-differences-in-femoral-version
#3
William P Croom, Daniel J Lorenzana, Richard L Auran, Matthew J Cavallero, Nathanael Heckmann, Jackson Lee, Eric A White
OBJECTIVES: To determine native individual bilateral differences in femoral version in a diverse population. METHODS: Computed tomography scans with complete imaging of uninjured bilateral femora were used to determine femoral version and individual bilateral differences in version. Age, sex, and ethnicity of each subject were also collected. Femoral version and individual bilateral differences in version were correlated with demographic variables using univariate and multivariate regression models...
September 11, 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28888787/radiographic-cup-anteversion-measurement-corrected-from-pelvic-tilt
#4
Liao Wang, Andrew R Thoreson, Robert T Trousdale, Bernard F Morrey, Kerong Dai, Kai-Nan An
The purpose of this study was to develop a novel technique to improve the accuracy of radiographic cup anteversion measurement by correcting the influence of pelvic tilt. Ninety virtual total hip arthroplasties were simulated from computed tomography data of 6 patients with 15 predetermined cup orientations. For each simulated implantation, anteroposterior (AP) virtual pelvic radiographs were generated for 11 predetermined pelvic tilts. A linear regression model was created to capture the relationship between radiographic cup anteversion angle error measured on AP pelvic radiographs and pelvic tilt...
September 6, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28885648/improving-registration-accuracy-during-total-hip-arthroplasty-a-cadaver-study-of-a-new-3-d-mini-optical-navigation-system
#5
Michael B Cross, Ran Schwarzkopf, Theodore T Miller, Eric A Bogner, Jeffrey M Muir, Jonathan M Vigdorchik
INTRODUCTION: Maintaining accuracy of component placement is an important step in ensuring the long-term stability of components during total hip arthroplasty (THA). Computer-assisted navigation has improved accuracy but errors associated with the registration process are known to impact the accuracy of final measurements. The purpose of this cadaver study was to determine the registration error associated with a novel mini-navigation system. METHODS: 3 board-certified orthopaedic surgeons performed 4 THA procedures each via the posterolateral approach on 6 cadavers (12 hips) using the mini-navigation tool...
September 2, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28872534/morphological-analysis-of-true-acetabulum-in-hip-dysplasia-crowe-classes-i-iv-via-3-d-implantation-simulation
#6
Yuhui Yang, Jianlin Zuo, Tong Liu, Jianlin Xiao, Shuanglu Liu, Zhongli Gao
BACKGROUND: The purpose of this study was to investigate the 3-dimensional (3D) morphological features of the true acetabulum in patients with developmental dysplasia of the hip (DDH). METHODS: Seventy-nine hips-53 in patients with developmental dysplasia of the hip (DDH) and 36 normal hips-were included in the present study. According to the Crowe classification, 26 hips were graded as Class I, 31 were Class II or III, and 22 were Class IV. The anterior pelvic plane was defined to standardize the measurements in the study...
September 6, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28870743/accuracy-of-cup-positioning-with-the-computed-tomography-based-two-dimensional-to-three-dimensional-matched-navigation-system-a-prospective-randomized-controlled-study
#7
Kazuki Yamada, Hirosuke Endo, Tomonori Tetsunaga, Takamasa Miyake, Tomoaki Sanki, Toshifumi Ozaki
BACKGROUND: The accuracy of various navigation systems used for total hip arthroplasty has been described, but no publications reported the accuracy of cup orientation in computed tomography (CT)-based 2D-3D (two-dimensional to three-dimensional) matched navigation. METHODS: In a prospective, randomized controlled study, 80 hips including 44 with developmental dysplasia of the hips were divided into a CT-based 2D-3D matched navigation group (2D-3D group) and a paired-point matched navigation group (PPM group)...
August 12, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28861192/comparison-of-outcomes-of-total-hip-arthroplasty-between-patients-with-ankylosing-spondylitis-and-avascular-necrosis-of-the-femoral-head
#8
Sun-Ho Lee, Gun-Woo Lee, Young-Jun Seol, Kyung-Soon Park, Taek-Rim Yoon
BACKGROUND: The objective of this study was to compare clinical and radiological outcomes of total hip arthroplasty (THA) between ankylosing spondylitis (AS) of the hip joint and avascular necrosis (AVN) of the femoral head. METHODS: Thirty patients (30 hips) underwent cementless THA for AS between 2003 and 2012. They were compared to 30 patients (30 hips) who underwent the same procedure for AVN of the femoral head. Each group was matched for age and gender, and both groups had similar preoperative demographic characteristics...
September 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/28861191/porous-femoral-fixation-in-total-hip-arthroplasty-with-short-anatomical-stem-radiographic-evaluation
#9
Suresh Patil, Carrilero Luis, Henry Finn
BACKGROUND: Hip prostheses with short anatomical stems were designed for metaphyseal fixation and to spare bone stock. We present a study of a short anatomical femoral stem used in all age groups of patients with Dorr A and B type of femora. METHODS: We reviewed radiographs of 85 hips in 74 patients who had a cementless total hip arthroplasty with a short anatomical 80 mm femoral stem designed to achieve pure metaphyseal fixation. A ream-only technique was used for femoral canal preparation in all patients...
September 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/28860392/factors-affecting-the-potential-for-posterior-bony-impingement-after-total-hip-arthroplasty
#10
T Shoji, T Yamasaki, S Izumi, H Murakami, K Mifuji, M Sawa, Y Yasunaga, N Adachi, M Ochi
AIMS: Our aim was to evaluate the radiographic characteristics of patients undergoing total hip arthroplasty (THA) for the potential of posterior bony impingement using CT simulations. PATIENTS AND METHODS: Virtual CT data from 112 patients who underwent THA were analysed. There were 40 men and 72 women. Their mean age was 59.1 years (41 to 76). Associations between radiographic characteristics and posterior bony impingement and the range of external rotation of the hip were evaluated...
September 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28851328/measurement-of-acetabular-inclination-and-anteversion-via-ct-generated-3d-pelvic-model
#11
R Y Wang, W H Xu, X C Kong, L Yang, S H Yang
BACKGROUND: Inclination and anteversion were the main factors that determined the reliability of the acetabulum. Inclination and anteversion measurements included anatomical, operational and radiographic methods. The aim of our present study was to exhibit divergence of inclination and anteversion via the three measurements. METHODS: Inclination and anteversion were defined according to the definitions put forward by Murray. Three-dimensional models of pelvis of CT data were brought forth...
August 29, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28851263/efficacy-of-a-computed-tomography-based-navigation-system-for-placement-of-the-acetabular-component-in-total-hip-arthroplasty-for-developmental-dysplasia-of-the-hip
#12
Takahiko Tsutsui, Tomohiro Goto, Keizo Wada, Tomoya Takasago, Daisuke Hamada, Koichi Sairyo
PURPOSE: Developmental dysplasia of the hip (DDH) presents a considerable surgical challenge in total hip arthroplasty (THA). Although the usefulness of computed tomography (CT)-based navigation in cup alignment has been reported, few reports have evaluated three-dimensional (3-D) cup positioning against the acetabulum specifically in patients with DDH. The purpose of this study was to evaluate the efficacy of a CT-based navigation system for alignment and spatial positioning of the cup in THA for patients with DDH...
September 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28822721/postural-assessment-in-class-iii-patients-before-orthognathic-surgery
#13
Fernando Zugno Kulczynski, Fernando de Oliveira Andriola, Pedro Henrique Deon, Denizar Alberto da Silva Melo, Rogério Miranda Pagnoncelli
PURPOSE: To determine the postural characteristics of patients with Class III dentofacial deformities before orthognathic surgery by photogrammetry using SAPO postural assessment software. MATERIALS AND METHODS: This was a cross-sectional study. Eligible participants were adult patients who had an indication for orthognathic surgery to correct skeletal Class III dentofacial deformities and were undergoing orthodontic preparation for surgery. Patients were recruited at the outpatient clinic for dentofacial deformities of the authors' institution from March to November 2015...
July 25, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28819595/early-intraprosthetic-dislocation-of-a-dual-mobility-acetabular-construct-after-total-hip-arthroplasty
#14
Vineet Tyagi, Oluwaseun Akinbo
INTRODUCTION: The concept of a dual mobility (DM) cup has been in existence for more than 40 years and was initially popularized in Europe. Only recently has it started to garner attention in the United States. Its design, consisting of a small femoral head articulating within a larger polyethylene (PE) insert, which articulates with an outer shell, has found increasing use in patients that are at risk for post-operative dislocations. This case report describes a case of recurrent total hip arthroplasty (THA) dislocation managed with the implantation of a DM cup with an acute intraprosthetic dislocation of the DM construct...
March 2017: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28806971/factors-contributing-to-the-variability-of-a-predictive-score-for-cranial-cruciate-ligament-deficiency-in-labrador-retrievers
#15
Devin P Cunningham, Ayman A Mostafa, Wanda J Gordan-Evans, Randy J Boudrieau, Dominique J Griffon
BACKGROUND: We recently reported that a conformation score derived from the tibial plateau angle (TPA) and the femoral anteversion angle (FAA), best discriminates limbs predisposed to, or affected by cranial cruciate ligament disease (CCLD), from those that are at low risk for CCLD. The specificity and sensitivity of this score were high enough to support further investigations toward its use for large-scale screening of dogs by veterinarians. The next step, which is the objective of the current study, is to determine inter-observer variability of that CCLD score in a large population of Labrador Retrievers...
August 14, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28794584/changes-in-spinopelvic-indices-after-hip-arthroplasty-and-its-influence-on-acetabular-component-orientation
#16
Siddharth Mahesh Shah, Selin Munir, William Lindsay Walter
OBJECTIVE: To evaluate spinopelvic changes after hip arthroplasty in standing and ready-to-rise positions. METHODS: We compared pelvic tilt, sacral slope, cobb's angle, and hip flexion on pre and postoperative spinopelvic radiographs. RESULTS: Standing: All postoperative indices were similar to preoperative ones except sacral slope (mean difference:1.6°, p = 0.046). Ready-to-rise: All postoperative indices were similar to preoperative ones except pelvic tilt which was significantly greater postoperatively (mean difference: 5...
December 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28790467/current-concepts-in-acetabular-positioning-in-total-hip-arthroplasty
#17
Deepu Bhaskar, Asim Rajpura, Tim Board
Being one of the most successful surgeries in the history of medicine, the indications for total hip arthroplasty have widened and are increasingly being offered to younger and fitter patients. This has also led to high expectations for longevity and outcomes. Acetabular cup position has a significant impact on the results of hip arthroplasty as it affects dislocation, abductor muscle strength, gait, limb lengths, impingement, noise generation, range of motion (ROM), wear, loosening, and cup failure. The variables in cup position are depth, height, and angular position (anteversion and inclination)...
July 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28782700/effects-of-intertrochanteric-osteotomy-plane-and-pre-operative-femoral-anteversion-on-the-post-operative-morphology-of-the-proximal-femur-in-transtrochanteric-anterior-rotational-osteotomy-3d-ct-based-simulation-study
#18
Kazuhiko Sonoda, Goro Motomura, Satoshi Ikemura, Yusuke Kubo, Takuaki Yamamoto, Yasuharu Nakashima
BACKGROUND: Transtrochanteric anterior rotational osteotomy (ARO) is joint-preserving surgery for patients with osteonecrosis of the femoral head (ONFH).During ARO, femoral neck-shaft varus angulation by changing intertrochanteric osteotomy plane is often designed to obtain a sufficient post-operative intact ratio. However, the effect of intertrochanteric osteotomy plane on post-operative femoral anteversion has not been well examined.Therefore we performed a simulation study of ARO to determinehow intertrochanteric osteotomy plane and pre-operative femoral anteversionaffect both femoral neck-shaft varus angle and post-operative femoral anteversion...
August 3, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28780593/the-mechanical-effects-of-cup-inclination-and-anteversion-angle-on-the-bearing-surface
#19
Nobuhiro Kaku, Tomonori Tabata, Hiroaki Tagomori, Tetsutaro Abe, Hiroshi Tsumura
BACKGROUND: Regarding the cup setting in total hip arthroplasty, range of motion and prevention of dislocation are important. From past reports, the wear of the bearing surface may affect long-term results. This study evaluated the stress applied to the bearing surface by the combined use of the three-dimensional rigid spring model and the finite-element analysis. METHODS: For contact pressure distribution of the bearing surface, interference analysis was performed using a three-dimensional rigid body spring model...
August 5, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28777285/3d-modeling-of-lower-extremities-with-biplanar-radiographs-reliability-of-measures-on-subsequent-examinations
#20
David E Westberry, Ashley M Carpenter
BACKGROUND: Biplanar radiography with 3-dimensional (3D) modeling (EOS) provides a comprehensive assessment of lower limb alignment in an upright weight-bearing position with less radiation than conventional radiography. A study was performed to assess the consistency and reliability of 2 lower extremity 3D biplanar radiograph models created at least 1 year apart in a pediatric population. METHODS: All patients who had 2 lower extremity radiographic evaluations with EOS performed at visits a minimum of 1 year apart were reviewed...
August 2, 2017: Journal of Pediatric Orthopedics
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