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Anteversion

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https://www.readbyqxmd.com/read/28218378/screw-hole-clusters-in-acetabular-cups-a-morphological-study-of-optimal-positioning-of-screw-holes
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
https://www.readbyqxmd.com/read/28165597/increase-in-safe-zone-area-of-the-acetabular-cup-using-dual-mobility-cups-in-tha
#8
Takaaki Ohmori, Tamon Kabata, Toru Maeda, Yoshitomo Kajino, Tadashi Taga, Kazuhiro Hasegawa, Daisuke Inoue, Takashi Yamamoto, Tomoharu Takagi, Hiroyuki Tsuchiya
BACKGROUND: Dual mobility cup (DMC) inserts reduce the risk of dislocation after total hip arthroplasty (THA). No available research has clearly delineated stability advantages of DMC inserts in primary and revision THA. We investigated: (i) the degree of change in the safe zone of the cup when a DMC insert is used compared to a fixed insert; (ii) the method of selecting candidates for a DMC insert without changing the position of the acetabular (cup) component during revision THA in frequent dislocation cases caused by implant impingement...
January 30, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28165596/screws-are-not-needed-when-secure-interference-fit-of-uncemented-acetabular-components-is-adequate-a-5-to-15-year-follow-up-with-clinical-and-radiological-analysis
#9
Eduardo García-Rey
PURPOSE: Even with good surgical preparation, adequate primary stability of the acetabular component is not always achieved after primary total hip replacement (THR). We hypothesise that adequate bone preparation for appropriate cortical loading would allow us to avoid screw use. METHODS: A total of 791 uncemented cups were analysed to compare the need for screws to obtain primary fixation in 5 different designs. Arthritic hips with inflammatory arthritis or severe congenital hip disease were excluded...
January 31, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28165589/new-cross-table-lateral-radiography-method-for-measuring-acetabular-component-anteversion-in-total-hip-arthroplasty-a-prospective-study-of-93-primary-tha
#10
Hajime Seo, Masatoshi Naito, Yoshinari Nakamura, Koichi Kinoshita, Tomohiro Nomura, So Minokawa, Tomohiko Minamikawa, Takuaki Yamamoto
INTRODUCTION: Various methods have been described for measuring acetabular component anteversion. However, accurate measurement of anteversion is difficult. We herein propose a new method using cross-table lateral (CL) radiography performed with the contralateral hip flexed to 45° (45° flexed CL radiography). The main purpose of this study was to evaluate the reliability and validity of this new method. METHODS: The study group included 93 patients who underwent total hip arthroplasty (THA)...
January 31, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28162883/posterior-open-wedge-osteotomy-of-the-scapula-neck-for-the-treatment-of-advanced-shoulder-osteoarthritis-with-posterior-head-migration-in-young-patients
#11
Reinhold Ortmaier, Philipp Moroder, Corinna Hirzinger, Herbert Resch
BACKGROUND: Treatment of young, active patients with symptomatic glenohumeral osteoarthritis, excessive glenoid retroversion, and static posterior humeral subluxation is challenging. Correction of glenoid retroversion may lead to centric loading and perhaps recenter the humeral head. We describe the functional and radiologic outcomes after corrective osteotomy of the glenoid in this population of patients. MATERIALS AND METHODS: In this retrospective study, we included 10 shoulders (8 patients) that were observed for a mean of 33...
February 2, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28162877/humeral-version-in-reverse-shoulder-arthroplasty-affects-impingement-in-activities-of-daily-living
#12
Andreas Kontaxis, Xiang Chen, Julien Berhouet, Daniel Choi, Timothy Wright, David M Dines, Russell F Warren, Lawrence V Gulotta
BACKGROUND: Impingement after reverse shoulder arthroplasty (RSA) has been correlated with implant design and surgical techniques. Previous studies suggested that humeral retroversion can reduce impingement and increase external rotation range of motion (ROM). The purpose of this study was to determine how humeral version affects impingement in activities of daily living (ADLs). MATERIALS AND METHODS: A single surgeon performed virtual RSA on 30 arthritic shoulders that were reconstructed from preoperative computed tomography scans...
February 2, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28153459/total-hip-arthroplasty-in-the-spinal-deformity-population-does-degree-of-sagittal-deformity-affect-rates-of-safe-zone-placement-instability-or-revision
#13
Edward M DelSole, Jonathan M Vigdorchik, Ran Schwarzkopf, Thomas J Errico, Aaron J Buckland
BACKGROUND: Changes in spinal alignment and pelvic tilt alter acetabular orientation in predictable ways, which may have implications on stability of total hip arthroplasty (THA). Patients with sagittal spinal deformity represent a subset of patients who may be at particularly high risk of THA instability because of postural compensation for abnormal spinal alignment. METHODS: Using standing stereoradiography, we evaluated the spinopelvic parameters, acetabular cup anteversion, and inclination of 139 THAs in 107 patients with sagittal spinal deformity...
December 27, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28150099/sex-and-age-specific-differences-in-femoral-head-coverage-and-acetabular-morphology-among-healthy-subjects-derivation-of-normal-ranges-and-thresholds-for-abnormality
#14
Dai Miyasaka, Yoshinori Sakai, Shinya Ibuchi, Hayato Suzuki, Norio Imai, Naoto Endo
OBJECTIVE: We aimed to clarify sex- and age-specific differences in three-dimensional and anatomic characteristics of femoral head coverage and acetabular morphology in healthy subjects. MATERIALS AND METHODS: The study included 120 healthy subjects (57 male, 63 female), stratified into groups according to age and sex. We used computed tomography data to measure various anatomic alignment parameters describing femoral head coverage and acetabular morphology. RESULTS: The lateral sector angle in the coronal plane, anterior sector angle in the sagittal plane, and posterior sector angles in the axial plane, which characterize femoral head coverage, did not differ significantly between males and females...
April 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28149194/acetabular-component-orientation-in-total-hip-arthroplasty-the-role-of-acetabular-transverse-ligament
#15
Mohammed El Idrissi, Abdelhalim Elibrahimi, Mohammed Shimi, Abdelmajid Elmrini
OBJECTIVE: The aim of our study is to present the benefit of using the transvers acetabular ligament for intraoperative determination of the anteversion of acetabular component. METHODS: Twenty-one total hip arthroplasties were performed. The transverse acetabular ligament was identified and used as a guide to position the acetabular component. RESULTS: The mean anteversion angle was 16.9. None of the patients studied sustained a postoperative dislocation during this short follow-up period...
September 2016: Acta Ortopedica Brasileira
https://www.readbyqxmd.com/read/28145952/patient-and-radiographic-factors-help-to-predict-metal-on-metal-hip-resurfacings-with-evidence-of-a-pseudotumor
#16
Gulraj S Matharu, Oliver Blanshard, Kawaljit Dhaliwal, Andrew Judge, David W Murray, Hemant G Pandit
BACKGROUND: The role of radiographs in the follow-up of patients with metal-on-metal hip resurfacing (MoMHR) implants is unclear. We investigated whether a combination of patient and radiographic factors predicted MoMHRs with evidence of a pseudotumor. METHODS: We performed a retrospective single-center case-control study of 384 MoMHRs. The pseudotumor group of 130 hips all had evidence of a symptomatic pseudotumor on cross-sectional imaging, with the diagnosis confirmed at revision...
February 1, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28139342/revision-total-hip-arthroplasty-using-imageless-navigation-with-the-concept-of-combined-anteversion
#17
Jun-Dong Chang, In-Sung Kim, Sharad Prabhakar, Sameer A Mansukhani, Sang-Soo Lee, Je-Hyun Yoo
BACKGROUND: The purpose of the study was to evaluate the implant positions and clinical results of revision total hip arthroplasty (THA) using an imageless navigation with the concept of combined anteversion. METHODS: A total of 40 cementless revision THAs (24 men and 16 women) using an imageless navigation with the concept of combined anteversion were retrospectively evaluated. The concept of combined anteversion was applied in cup positioning based on Widmer's equation (cup anteversion + 0...
December 27, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28127618/the-effect-of-valgus-and-varus-femoral-osteotomies-on-measures-of-anteversion-in-the-dog
#18
Rachel W Adams, Brad Gilleland, Farrah Monibi, Samuel P Franklin
OBJECTIVE: To determine whether femoral osteotomies that change frontal plane alignment without affecting torsion influence anteversion and inclination. METHODS: Femurs without deformity were scanned to create three-dimensional reconstructions. The femoral head-neck axis was identified by placement of a virtual intramedullary pin. A proximal osteotomy was simulated to create three conditions while keeping torsion constant: Normal, Coxa Valga (neck-shaft angle increased by 12°), and Coxa Vara (neck-shaft angle decreased by 12°)...
January 27, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/28121928/cementless-total-hip-arthroplasty-in-patients-with-ankylosing-spondylitis-a-retrospective-observational-study
#19
Jun Xu, Min Zeng, Jie Xie, Ting Wen, Yihe Hu
Controversies on the surgical protocols and efficacies of total hip arthroplasty (THA) in ankylosing spondylitis (AS) still exist. The aim of this study was to retrospectively analyze the perioperative managements and their outcomes related to performing THA on patients with AS.Data of 54 AS patients who underwent 81 THAs between 2008 and 2014 were retrospectively analyzed. Clinical and imaging data were collected preoperatively, postoperatively, and during the follow-up period for surgical efficacy.Using posterolateral approach, cementless prostheses were selected in all cases...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28116505/total-hip-arthroplasty-after-failed-treatment-of-proximal-femur-fracture
#20
Tomonori Tetsunaga, Kazuo Fujiwara, Hirosuke Endo, Tomoyuki Noda, Tomoko Tetsunaga, Toru Sato, Naofumi Shiota, Toshifumi Ozaki
INTRODUCTION: Total hip arthroplasty (THA) is a good option as a salvage procedure after failed treatment of proximal femur fracture. The anatomy of the proximal femur, however, makes this surgery complicated and challenging. The purpose of this study was to evaluate the radiographic and clinical outcomes of THA after failed treatment of proximal femur fractures. MATERIALS AND METHODS: We retrospectively analysed 50 consecutive THAs (42 women, 8 men; mean age 77 years) after failed treatment of a proximal femur fracture...
January 23, 2017: Archives of Orthopaedic and Trauma Surgery
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