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https://www.readbyqxmd.com/read/28720007/extensor-pollicis-brevis-spiral-tenodesis-for-combined-metacarpophalangeal-instability-and-trapeziometacarpal-arthritis
#1
Mark Henry
BACKGROUND: In more advanced stages of trapeziometacarpal arthritis, the thumb metacarpal may develop an adduction contracture, leading to secondary hyperextension instability of the metacarpophalangeal joint. Following trapeziometacarpal arthroplasty, uncorrected substantial metacarpophalangeal hyperextension may contribute to ongoing Z-collapse deformity, weakness of pinch and grip, and patient perception of diminished function. METHODS: We prospectively analyzed a consecutive case series of 55 trapeziometacarpal arthroplasty patients (mean age, 60 years; 7 males) who received simultaneous extensor pollicis brevis spiral tenodesis for thumb metacarpophalangeal hyperextension of at least 50°...
March 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28713612/in-vivo-magnetic-resonance-imaging-morphometry-of-the-patella-bone-in-south-indian-population
#2
Reshma Muhamed, Vasudha V Saralaya, B V Murlimanju, Ganesh Kumar Chettiar
Racial differences exist in the dimensions of structures and the commercially available prostheses are designed based on the Caucasians. In this context, the goal of the present investigation was to determine the gender wise measurements of patella bone in South Indians. The present study included axial magnetic resonance images of the knee joint from 140 South Indian adults (70 males, 70 females; aged between 20-70 years). The angle, width, thickness, lateral facet width, facet thickness, ratio of the lateral facet, the relative thickness and ratio of facet thickness were measured in the patella by using the digital ruler...
June 2017: Anatomy & Cell Biology
https://www.readbyqxmd.com/read/28711169/the-risk-of-suprascapular-and-axillary-nerve-injury-in-reverse-total-shoulder-arthroplasty-an-anatomic-study
#3
Tim Leschinger, Michael Hackl, Eduard Buess, Sebastian Lappen, Martin Scaal, Lars Peter Müller, Kilian Wegmann
PURPOSE: Implantation of a reverse total shoulder arthroplasty (rTSA) places the axillary and suprascapular nerves at risk. The aim of this anatomic study was to digitally analyse the location of these nerves in relation to bony landmarks in order to predict their path and thereby help to reduce the risk of neurological complications during the procedure. METHODS: A total of 22 human cadaveric shoulder specimens were used in this study. The axillary and suprascapular nerves were dissected, and radiopaque threads were sutured onto the nerves without mobilizing the nerves from their native paths...
June 28, 2017: Injury
https://www.readbyqxmd.com/read/28704746/a-case-report-of-an-anterior-tibial-artery-pseudo-aneurysm-open-surgical-management-a-rare-complication-post-total-knee-arthroplasty
#4
Kang Lie Darius Aw, Choon Chieh Tan, Jack Kian Ch'ng, Siew Ping Chng
INTRODUCTION: Complications involving injury to neurological and vascular structures are infrequently reported after total knee arthroplasty (TKA). They are associated with significant morbidity and can be limb threatening. PRESENTATION OF CASE: We present a patient with an anterior tibial artery (ATA) aneurysm post total knee arthroplasty. A 69-year-old female was referred for a swelling over her left antero-lateral aspect of her leg 4 years post TKA. Radiological investigations showed an ATA pseudo aneurysm...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28684111/frontal-alignment-in-total-knee-arthroplasty-comparative-study-between-radiographic-measurement-and-surgical-navigation
#5
D Hernandez-Vaquero, A Noriega-Fernandez, A Suarez-Vazquez, S Roncero-Gonzalez, A A Sierra-Pereira, L Gil-Martinez, J M Fernandez-Carreira
OBJECTIVE: To establish the concordance between angulation of the femoro-tibial mechanical axis measured with x-rays and surgical navigation in both the pre and postoperative period after a total knee arthroplasty (TKA) was implanted. MATERIAL AND METHOD: Pre and postoperative measurements were analyzed in 88 TKA of the same model and all performed with the same surgical navigation system. The mechanical frontal angle (MFA) and femoro-tibial anatomic angle were measured before and after the TKA...
July 3, 2017: Revista Española de Cirugía Ortopédica y Traumatología
https://www.readbyqxmd.com/read/28683496/-prosthetic-joint-infection-after-total-hip-arthroplasty-results-of-an-online-questionnaire-about-current-diagnostic-and-therapeutic-procedures-in-107-german-hospitals
#6
Elia Raoul Langenmair, Lukas Konstantinidis, Norbert P Südkamp, Peter Helwig
Background Prosthetic hip joint infection is a common severe complication with a high socio-economic impact. The inconsistency of the available data and the absence of binding guidelines lead to a variety of diagnostic and therapeutic strategies. The aim of this study is to present the current diagnostic and therapeutic approach to treating infections after total hip arthroplasties in German hospitals, link it with current evidence, and evaluate the willingness of these hospitals to participate in prospective multicentre trials...
June 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28679400/the-effectiveness-of-the-use-of-a-digital-activity-coaching-system-in-addition-to-a-two-week-home-based-exercise-program-in-patients-after-total-knee-arthroplasty-study-protocol-for-a-randomized-controlled-trial
#7
Karen E M Harmelink, A V C M Zeegers, Thijs M Tönis, Wim Hullegie, Maria W G Nijhuis-van der Sanden, J Bart Staal
BACKGROUND: There is consistent evidence that supervised programs are not superior to home-based programs after total knee arthroplasty (TKA), especially in patients without complications. Home-based exercise programs are effective, but we hypothesize that their effectiveness can be improved by increasing the adherence to physical therapy advice to reach an adequate exercise level during the program and thereafter. Our hypothesis is that an activity coaching system (accelerometer-based activity sensor), alongside a home-based exercise program, will increase adherence to exercises and the activity level, thereby improving physical functioning and recovery...
July 5, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28675977/the-reliability-of-measuring-acetabular-component-position-on-radiographs-using-everyday-diagnostic-imaging-software
#8
Jack Lahy, Jarrad Stevens, Dean McKenzie, Richard de Steiger
BACKGROUND: It is standard practice for total hip arthroplasty (THA) patients to have post-operative imaging, and one of the reasons is to assess the adequacy of acetabular component position. Correct positioning of the acetabular component is important for successful outcome in THA. Acetabular component position can be measured from either computed tomography (CT) or plain radiographs. While CT is the gold standard for accurately measuring acetabular component position, radiographs are routinely used for post-operative evaluation...
May 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28664415/validation-of-three-dimensional-models-of-the-distal-femur-created-from-surgical-navigation-point-cloud-data-for-intraoperative-and-postoperative-analysis-of-total-knee-arthroplasty
#9
David A J Wilson, Carolyn Anglin, Felix Ambellan, Carl Martin Grewe, Alexander Tack, Hans Lamecker, Michael Dunbar, Stefan Zachow
PURPOSE: Despite the success of total knee arthroplasty, there continues to be a significant proportion of patients who are dissatisfied. One explanation may be a shape mismatch between pre- and postoperative distal femurs. The purpose of this study was to investigate methods suitable for matching a statistical shape model (SSM) to intraoperatively acquired point cloud data from a surgical navigation system and to validate these against the preoperative magnetic resonance imaging (MRI) data from the same patients...
June 29, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28657561/total-knee-replacement-intraoperative-and-postoperative-kinematic-assessment
#10
M Bontempi, U Cardinale, L Bragonzoni, L Macchiarola, A Grassi, C Signorelli, G M Marcheggiani Muccioli, Stefano Zaffagnini
BACKGROUND AND AIM: The main goals of the total knee arthroplasty (TKA) is to reduce the perceived pain and  restore knee mobility and function in case of osteoarthritic knees joints. Literature shows how the three major causes of TKA failures are related to wear, loosening and instability and this is due to a problem of imbalance and malalignment. Intraoperative and postoperative kinematics analysis could be of benefit for improving surgery outcome. The aim of the present paper is to give an overview of the two set-up with the highest accuracy for intraoperative and postoperative TKA kinematics evaluation, currently in use at Istituto Ortopedico Rizzoli...
June 7, 2017: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/28645703/mapping-of-the-anterior-tibial-profile-to-identify-accurate-reference-points-for-sagittal-alignment-of-tibial-component-in-total-knee-arthroplasty
#11
Gianluca Cinotti, Ettore Caruso, Luigi Orsina, Giuseppe La Torre, Francesca Romana Ripani
BACKGROUND: Although standard instrumentation is the procedure most frequently used to implant a total knee arthroplasty (TKA), high rates of malalignment of tibial component are reported using this technique. Anatomical landmarks for sagittal alignment have been little investigated and the best reference axis which parallels the mechanical axis is yet to be established. HYPOTHESIS: Mapping the anterior tibial profile (ATP) may allow the identification of segmental zones of the ATP parallel to the mechanical axis which can be use to align the extramedullary rod...
June 20, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28643079/similar-clinical-outcomes-with-preoperative-and-postoperative-start-of-thromboprophylaxis-in-tha-a-register-based-study
#12
Pål O Borgen, Are H Pripp, Eva Dybvik, Lilian Leistad, Ola E Dahl, Olav Reikerås
BACKGROUND: Elective THA is associated with a high risk of thromboembolic events. Although these events may be less common now than they were in the past, they can be serious, and most patients undergoing the procedure therefore still receive thromboprophylaxis. However, controversy remains regarding whether to begin thromboprophylaxis before THA or after to best balance the risks of clotting and bleeding. QUESTIONS/PURPOSES: We asked the following questions: (1) Is there a difference in bleeding events with pre- versus postoperative thromboprophylaxis? (2) Is there a difference in thromboembolic episodes after THA between the two regimens? (3) How do the two approaches of thromboprophylaxis influence mortality, readmissions, and other complications? METHODS: We used a population-based followup design with predefined data based on international health codification to assess clinical effects of LMWH prophylaxis initiated before or after THA...
September 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28580056/a-pictorial-review-of-reconstructive-foot-and-ankle-surgery-elective-lesser-forefoot-procedures
#13
REVIEW
Andrew J Meyr, Laura Sansosti, Sayed Ali
This pictorial review focuses on basic procedures performed within the field of podiatric surgery, specifically for elective procedures of the lesser forefoot including the correction of hammertoes and lesser metatarsal deformities. Our goal is to demonstrate objective radiographic parameters that surgeons utilize to initially define the deformity, lead to procedure selection and judge post-operative outcomes. We hope that radiologists will employ this information to improve their assessment of post-operative radiographs following reconstructive foot surgeries...
November 2016: Journal of Radiology Case Reports
https://www.readbyqxmd.com/read/28557297/correlation-of-cup-inclination-angle-with-liner-wear-for-metal-on-polyethylene-in-hip-primary-arthroplasty
#14
Jia-Liang Tian, Li Sun, Rui-Yin Hu, Wei Han, Xiao-Bin Tian
OBJECTIVES: The relationship between cup inclination angle and liner wear is controversial. Most authors in the published literature agree that the ideal cup inclination is associated with lower inner wear; however, some disagree. All previous studies did not control for femoral head diameter and inclination, so it is difficult to assess the relative or synergistic effects of cup angle on outcomes. METHODS: We retrospectively reviewed 154 patients (171 hips) with primary total hip arthroplasties performed from 2001 to 2004...
May 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28481956/tibial-revision-knee-arthroplasty-with-metaphyseal-sleeves-the-effect-of-stems-on-implant-fixation-and-bone-flexibility
#15
Jan Nadorf, Stefan Kinkel, Simone Gantz, Eike Jakubowitz, J Philippe Kretzer
INTRODUCTION: Revision total knee arthoplasty often requires modular implants to treat bone defects of varying severity. In some cases, it may not be clear which module size and implant combination (e.g. sleeve and stem) should be chosen for a specific defect. When balancing implant stability and osseointegration against stress-shielding, it is important to choose an appropriate implant combination in order to match the given level of bone loss. Therefore, the necessity of stems in less extensive tibial defects and the advantage of different stems (lengths and stiffnesses) in combination with large metaphyseal sleeves on implant fixation and bone flexibility using a modular tibial revision knee system, were analyzed...
2017: PloS One
https://www.readbyqxmd.com/read/28460422/effect-of-stem-sizing-and-position-on-short-term-complications-with-canine-press-fit-cementless-total-hip-arthroplasty
#16
Sarah Townsend, Stanley E Kim, Antonio Pozzi
OBJECTIVE: To determine the influence of stem sizing and positioning with early subsidence and stem complications with cementless (BFX) total hip arthroplasty (THA). STUDY DESIGN: Retrospective case series. ANIMALS: Fifty-five dogs; 58 THAs. METHODS: Eighty cobalt-chromium BFX THAs were reviewed, 58 met inclusion criteria. Implant size, positioning, and major complications within 12 months of surgery were recorded. Femoral canal flare (FCF), canal fill, stem angle, and subsidence at 3 months were measured from postoperative radiographs...
April 29, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28395945/radiographic-changes-and-clinical-outcomes-associated-with-an-adjustable-diaphyseal-press-fit-humeral-stem-in-primary-reverse-shoulder-arthroplasty
#17
Samuel M Harmsen, Tom R Norris
BACKGROUND: Press-fit humeral fixation in reverse shoulder arthroplasty (RSA) has become increasingly popular; however, radiographic analysis of these stems is limited. We aimed to evaluate the radiographic and clinical outcomes of an adjustable diaphyseal press-fit humeral stem in primary RSA. METHODS: We conducted a retrospective review of 232 primary RSAs in 219 patients performed by a single surgeon using this system. Radiographic outcomes were evaluated in patients with at least 2 years of radiographic follow-up...
April 7, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28393600/shell-design-and-reaming-technique-affect-deformation-in-mobile-bearing-total-hip-arthroplasty-acetabular-components
#18
Scott R Small, John B Meding, Jordan W Oja, Katherine S Lakstins, Danielle J Gehron, Renee D Rogge, Christine A Buckley
Press-fit acetabular components are susceptible to rim deformation. The inherent variability within acetabular reaming techniques may generate increased press-fit and, subsequently, additional component deformation. The purpose of this study was to analyze the insertion and deformation characteristics of acetabular components designed for dual-mobility systems based on component design, size, and reaming technique. Shell deformation was quantified in a validated worst-case scenario foam pinch model. Thin-walled, one-piece, and modular dual-mobility shells of varying size were implanted in under- and over-reamed cavities with insertion force measured and shell deformation assessed using digital image correlation...
April 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28391517/preoperative-digital-planning-versus-postoperative-outcomes-in-total-hip-arthroplasty-using-a-calcar-guided-short-stem-frequent-valgization-can-be-avoided
#19
Karl Philipp Kutzner, Joachim Pfeil, Mark Predrag Kovacevic
INTRODUCTION: Modern total hip arthroplasty is largely dependent on the successful preservation of hip geometry. Thus, a successful implementation of the preoperative planning is of great importance. The present study evaluates the accuracy of anatomic hip reconstruction predicted by 2D digital planning using a calcar-guided short stem of the newest generation. METHODS: A calcar-guided short stem was implanted in 109 patients in combination with a cementless cup using the modified anterolateral approach...
April 8, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28387436/2d-3d-reconstruction-of-the-distal-femur-using-statistical-shape-models-addressing-personalized-surgical-instruments-in-knee-arthroplasty-a-feasibility-analysis
#20
Pietro Cerveri, Costanza Sacco, Gianluca Olgiati, Alfonso Manzotti, Guido Baroni
BACKGROUND: Personalized surgical instruments (PSI) have gained success in the domain of total knee replacement, demonstrating clinical outcomes similar or even superior to both traditional and navigated surgeries. The key requirement for prototyping PSI is the availability of the digital bony surface. In this paper, we aim at verifying whether the 2D/3D reconstruction of the distal femur, based on statistical shape models (SSM), grants sufficient accuracy, especially in the condylar regions, to support a PSI technique...
April 7, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
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