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https://www.readbyqxmd.com/read/28341265/does-a-titanium-sleeve-reduce-the-frequency-of-pseudotumors-in-metal-on-metal-total-hip-arthroplasty-at-5-7years-follow-up
#1
M H Hjorth, N Egund, I Mechlenburg, J Gelineck, S S Jakobsen, K Soballe, M Stilling
INTRODUCTION: Little is known about pseudotumor frequency and risk factors for pseudotumor formation among different types of metal-on-metal (MoM) hip arthroplasties. A lower release of chromium and cobalt have been reported in MoM hip arthroplasties with a titanium sleeve compared to MoM designs without a titanium sleeve, but yet it is unknown whether a titanium sleeve reduces the pseudotumor frequency. We conducted a cross-sectional study to investigate: 1) pseudotumor frequency, 2) risk factors of pseudotumor formation 3) and correlations between pseudotumors, serum metal-ions, implant position, and clinical symptoms...
December 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28336192/radiological-morphology-variances-of-transient-osteoporosis-of-the-hip
#2
Ryosuke Yamaguchi, Takuaki Yamamoto, Goro Motomura, Satoshi Ikemura, Kenyu Iwasaki, Garida Zhao, Yukihide Iwamoto
BACKGROUND: Although several morphological abnormalities or variances of the hip joint have been proposed to be associated with hip joint degeneration, few studies have investigated any radiological features in patients with transient osteoporosis of the hip (TOH). The purpose of this study is to evaluate the morphological variances of the hip joint in TOH patients radiographically. METHODS: The TOH group consisted of 31 hips in 31 patients. Age- and gender-matched asymptomatic hips in patients with unilateral osteonecrosis of the femoral head were served as controls...
March 20, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28336189/3d-cad-reverse-engineering-technique-for-assessment-of-thai-morphology-proximal-femur-and-acetabulum
#3
Nattapon Chantarapanich, Sattaya Rojanasthien, Bancha Chernchujit, Banchong Mahaisavariya, Kavin Karunratanakul, Prasert Chalermkarnnon, Chinnawit Glunrawd, Kriskrai Sitthiseripratip
PURPOSE: To assess morphological parameters of proximal femur and acetabulum in Thai population with three-dimensional measurement technique, and to analysis of collateral side symmetric, gender difference, and correlation between morphometric parameters. METHODS: Investigation was performed in 240 femurs. All three-dimensional femur models were acquitted from 64-slice spiral CT scanner. Morphometric parameters under consideration included acetabular diameter, femoral head diameter, shaft isthmus location, intramedullary canal diameter, diaphyseal diameter, femoral head height, femoral neck isthmus, femoral neck length, neck shaft angle, bow angle, and anteversion angle...
March 20, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/28331928/computed-tomographic-evaluation-of-femoral-and-tibial-conformation-in-english-staffordshire-bull-terriers-with-and-without-congenital-medial-patellar-luxation
#4
Mark Newman, Katja Voss
OBJECTIVE: To compare hindlimb conformation of English Staffordshire Bull Terriers with and without medial patellar luxation using computed tomography. METHODS: Hindlimb computed tomography (CT) was performed on six English Staffordshire Bull Terriers with grade II or III medial patellar luxation, and six without medial patellar luxation. Inclination angle, femoral condyle trochanteric angle, anteversion angle (AA), distal anteversion angle (DAA), proximal anteversion angle (PAA), femoral varus angle (FVA), tibial valgus angle (TVA), and tibial torsion angle (TTA) were measured...
March 23, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/28328732/reliable-method-for-avoiding-malrotation-deformity-after-intramedullary-nailing-of-comminuted-femur-fractures-clinical-validation-of-a-previously-described-technique
#5
Ashoke Sathy, Jonathan C Barnwell, Sean N Shahrestani, Daniel Moore
OBJECTIVES: To evaluate a previously described technique using the inherent anteversion of intramedullary nail (IMN) to avoid malrotation in comminuted femur fractures and describe the use of magnetic resonance imaging (MRI) as an alternative method for assessing postoperative femoral version. DESIGN: Prospective consecutive cohort study. SETTING: Level I trauma center. PATIENT/PARTICIPANTS: Twenty-five consecutive patients with comminuted femur fractures (Winquist III/IV, OTA/AO 32-B/32-C) treated by a single surgeon with IMN between September 1, 2011, and February 28, 2015...
April 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28328561/does-orientation-of-the-femoral-head-affect-acetabular-development-an-experimental-study-in-lamb
#6
Luis Moraleda, Christian Bravo, Francisco Forriol, Javier Albiñana
BACKGROUND: Derotational osteotomy of the proximal femur has proved to be effective in the treatment of residual acetabular dysplasia. However, the reason why this osteotomy is effective remains debatable. The purpose of this study is to investigate if an alteration of femoral head orientation affects acetabular growth. METHODS: A proximal femoral osteotomy was performed in 21 lambs aged 3 months: 5 varus osteotomies (110 degrees), 4 valgus osteotomies (150 degrees), and 12 derotation osteotomies...
March 21, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28303384/spinopelvic-parameter-changes-and-low-back-pain-improvement-due-to-femoral-neck-anteversion-in-patients-with-severe-unilateral-primary-hip-osteoarthritis-undergoing-total-hip-replacement
#7
Andrea Piazzolla, Giuseppe Solarino, Davide Bizzoca, Viola Montemurro, Pedro Berjano, Claudio Lamartina, Biagio Moretti
PURPOSE: The study of the interrelation between hip and spine disorders is gaining increasing importance in the last years, but the link between Hip Osteoarthritis (HOA) and Low Back Pain (LBP) remains still unclear. Aim of the study is to assess the relationship between Femoral Neck Anteversion (FNA), LBP, and spinopelvic parameters in patients undergoing Total Hip Replacement (THR) for unilateral severe primary HOA. MATERIALS AND METHODS: 91 patients were recruited...
March 16, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28289642/therapeutic-effect-of-microcurrent-therapy-in-children-with-in-toeing-gait-caused-by-increased-femoral-anteversion-a-pilot-study
#8
Jae Ki Ahn, Dong Rak Kwon, Gi-Young Park, Ki-Hoon Lee, Jae Hwal Rim, Won Bin Jung, Dae Gil Kwon
OBJECTIVE: To investigate the efficacy of portable microcurrent therapy device (PMTD) of the hip internal rotators in the treatment of in-toeing gait caused by increased femoral anteversion in children over 8 years of age. METHODS: Eleven children (22 legs; 4 boys and 7 girls; mean age, 10.4±1.6 years) with in-toeing gait caused by increased femoral anteversion were included in the present study. All children received 60 minutes of PMTD (intensity, 25 µA; frequency, 8 Hz) applied to the hip internal rotators daily for 4 weeks...
February 2017: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28286463/range-of-movement-for-impingement-and-dislocation-avoidance-in-total-hip-replacement-predicted-by-finite-element-model
#9
Laura Ezquerra, María Paz Quilez, María Ángeles Pérez, Jorge Albareda, Belén Seral
Dislocation is a serious complication in total hip replacement (THR). An inadequate range of movement (ROM) can lead to impingement of the prosthesis neck on the acetabular cup; furthermore, the initiation of subluxation and dislocation may occur. The objective of this study was to generate a parametric three-dimensional finite element (FE) model capable of predicting the dislocation stability for various positions of the prosthetic head, neck, and cup under various activities. Three femoral head sizes (28, 32, and 36 mm) were simulated...
2017: Journal of Medical and Biological Engineering
https://www.readbyqxmd.com/read/28283706/three-dimensional-analysis-of-the-proximal-anterior-femoral-flare-and-torsion-anatomic-bases-for-metaphyseally-fixed-short-stems-design
#10
Elhadi Sariali, Yohan Knaffo
PURPOSE: The use of femoral stems with a short metaphyseal fixation may lead to fractures or subsidence. Such failures may be related to a mismatch between the torsions or the sagittal flares of the stem and the femur. The goal of our study was to perform a 3D analysis of the proximal metaphyseal femur anatomy with a special focus on the anterior proximal flare and torsion. Such data may help to detect the outlier patients for whom a short metaphyseal fixation should be avoided. METHODS: A prospective study included 80 consecutive patients who underwent a primary cementless THA with a 3D CT-scan based pre-operative planning...
March 10, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28278379/tibial-tuberosity-anteromedialization-for-patellofemoral-chondral-disease
#11
Federica Rosso, Roberto Rossi, Giorgio Governale, Antongiulio Marmotti, Valeria Cherubini, Umberto Cottino, Davide Edoardo Bonasia
BACKGROUND: Tibial tuberosity anteromedialization (TTA) is a well-established treatment option for patellofemoral chondral disease that is resistant to nonoperative treatment. However, the prognostic factors of this procedure are unknown. PURPOSE: To analyze the prognostic factors correlated with the midterm outcomes of TTA for patellofemoral chondral disease and determine the survivorship. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Indications of TTA for chondral disease included skeletal maturity, age <65 years, <grade 3 Kellgren-Lawrence degeneration, and isolated patellofemoral pain for ≥6 months despite nonoperative treatment...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28277416/incidence-and-risk-factors-of-hardware-related-complications-after-proximal-femoral-osteotomy-in-children-and-adolescents
#12
Myung Ki Chung, Soon-Sun Kwon, Byung Chae Cho, Gye Wang Lee, Jaeyoung Kim, Seung Jun Moon, Jae Woo Lee, Chin Youb Chung, Ki Hyuk Sung, Kyoung Min Lee, Moon Seok Park
Proximal femoral osteotomy has been used in cerebral palsy, Perthes disease, hip dysplasia, idiopathic femoral anteversion, and various hip diseases in children and adolescents. Conventionally, a blade plate (BP) has been used. However, the pediatric locking compression plate (LCP) has recently been applied widely. We compared the hardware-related complications of the BP and the LCP as well as the factors influencing these complications in patients who have undergone a proximal femoral osteotomy in children and adolescents...
March 8, 2017: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/28272092/chest-pain-from-hypermobility-responding-to-physical-therapy-in-an-adolescent
#13
Megan N Nash, Chloe A Liu, Brienna Maestas, Kristine U Layugan, Catherine C Culver, Jennifer King, David Kurahara
Hypermobility syndrome usually causes pain in limbs from extension type injuries. The authors report on a 16-yr-old female adolescent with incapacitating chest pain secondary to extreme hypermobility of the chest. This pain led the patient to see multiple specialists without improvement or diagnosis. Physical examination results revealed a very hypermobile patient who was able to internally rotate her shoulders inward until her elbows touched. This unusual hyperextension maneuver was achieved by holding the shoulders in anteversion with her hands on her hips (see figures in the article)...
March 6, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28218378/screw-hole-clusters-in-acetabular-cups-a-morphological-study-of-optimal-positioning-of-screw-holes
#14
Xinghua Yin, Yixin Zhou, Qiheng Tang, Dejin Yang, Hao Tang, Xingjian Huang
BACKGROUND: Rigid and safe transacetabular screw fixation in total hip arthroplasty (THA) is achieved by pursuing deeper bone stock and avoiding injuries to the neurovascular structures, but these efforts can be restricted by the distribution of screw-holes on cups by the manufacturer. We therefore tried to determine: (i) optimal screw-hole positions on cups to allow anatomical placement of screws; (ii) rationality of the basic 3-screw-hole cluster on commercial cups; and (iii) the optimum method for placing commercial cups in accordance with acetabular anatomy...
February 15, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28218372/chronological-changes-in-functional-cup-position-at-10-years-after-total-hip-arthroplasty
#15
Yusuke Okanoue, Masahiko Ikeuchi, Shogo Takaya, Masashi Izumi, Koji Aso, Teruhiko Kawakami
PURPOSE: This study aims to clarify the chronological changes in functional cup position at a minimum follow-up of 10 years after total hip arthroplasty (THA), and to identify the risk factors influencing a significant difference in functional cup position during the postoperative follow-up period. METHODS: We evaluated the chronological changes in functional cup position at a minimum follow-up of 10 years after THA in 58 patients with unilateral hip osteoarthritis...
February 15, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28216751/femoral-bowing-plane-adaptation-to-femoral-anteversion
#16
Alp Akman, Fahir Demirkan, Nuran Sabir, Murat Oto, Cagdas Yorukoglu, Esat Kiter
BACKGROUND: Femoral bowing plane (FBP) is the unattended subject in the literature. More over the femoral shaft with its bowing is neglected in established anteversion determination methods. There is limited information about the relationship between FBP and anteversion. Thus we focused on this subject and hypothesized that there could be an adaptation of FBP to anteversion. MATERIALS AND METHODS: FBP is determined on three-dimensional solid models derived from the left femoral computerized tomography data of 47 patients which were taken before for another reason and comparatively evaluated with anteversion...
January 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28213796/the-manchester-repair-an-instructional-video
#17
Caroline E Walsh, Lin L Ow, N Rajamaheswari, Peter L Dwyer
OBJECTIVE: The Manchester repair, developed in the UK by Donald, described in 1908, and later modified by Fothergill, is a well-studied and proven surgical treatment for uterovaginal prolapse when uterine preservation is desired. This operation is currently not widely performed in parts of the world (USA) but is becoming increasing popular in Europe. The objective of this video is to demonstrate our surgical technique and recommendations for successful completion of the procedure. METHODS: This patient is a 39-year-old woman with two previous vaginal deliveries who presented with a 1-year history of vaginal protrusion...
February 17, 2017: International Urogynecology Journal
https://www.readbyqxmd.com/read/28207829/three-dimensional-acetabular-orientation-measurement-in-a-reliable-coordinate-system-among-one-hundred-chinese
#18
Henghui Zhang, Yiping Wang, Songtao Ai, Xiaojun Chen, Liao Wang, Kerong Dai
Determining three-dimensional (3D) acetabular orientation is important for several orthopaedic scenarios, but the complex geometries of both pelvis and acetabulum make measurements of orientation unreliable. Acetabular orientation may also differ between the sexes or racial groups. We aimed to (1) establish and evaluate a novel method for measuring 3D acetabular orientation, (2) apply this new method to a large population of Chinese subjects, and (3) report relevant characteristics of native acetabular orientation in this population...
2017: PloS One
https://www.readbyqxmd.com/read/28194710/exchangeable-femoral-neck-dual-modular-tha-prostheses-have-poorer-survivorship-than-other-designs-a-nationwide-cohort-of-324-108-patients
#19
Sandrine Colas, Assia Allalou, Antoine Poichotte, Philippe Piriou, Rosemary Dray-Spira, Mahmoud Zureik
BACKGROUND: Exchangeable neck stems, defined as those with a dual taper (that is, a modular junction between the femoral head and the femoral neck and an additional junction between the neck and the stem body), were introduced in THA to improve restoration of joint biomechanics (restoring anteversion, offset, and limb length) and reduce the risk of dislocation. However exchangeable necks have been reported to result in adverse effects such as stem fractures and acute local tissue reaction...
February 13, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28168640/3d-computer-graphical-anatomy-study-of-the-femur-a-basis-for-a-new-nail-design
#20
Beat Schmutz, Stanley Kmiec, Martin E Wullschleger, Martin Altmann, Michael Schuetz
BACKGROUND: Current intramedullary nails with a radius of curvature (ROC) of 1500-2000 mm sometimes cause distal anterior cortical encroachment. Furthermore, clinical data indicate that the proximal nail end is too long for some Asian patients. The objective of our study was to develop a comprehensive 3D measurement protocol that measures both the anatomy of the canal and the proximal region. The protocol was used to obtain measurements from Caucasian and Asian (Japanese and Thai) specimens...
March 2017: Archives of Orthopaedic and Trauma Surgery
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