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https://www.readbyqxmd.com/read/29282486/patient-specific-instrumentation-in-oxford-unicompartmental-knee-arthroplasty-is-reliable-and-accurate-except-for-the-tibial-rotation
#1
B Kerens, A M Leenders, M G M Schotanus, B Boonen, W E Tuinebreijer, P J Emans, B Jong, N P Kort
PURPOSE: Patient-specific instrumentation (PSI) is a technique to plan and position the prosthesis components in unicompartmental knee arthroplasty (UKA) surgery. This study assesses whether the definitive component position in the frontal, sagittal and axial plane is according to the preoperative plan, based on the hypothesis that PSI is accurate. METHODS: Twenty-six patients who had PSI Oxford UKA surgery were included prospectively. The component position in vivo was determined with a postoperative CT-scan and compared with the planned component position using MRI-based digital 3D imaging...
December 27, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29229238/effectiveness-of-an-automated-digital-remote-guidance-and-telemonitoring-platform-on-costs-readmissions-and-complications-after-hip-and-knee-arthroplasties
#2
Benjamin I Rosner, Marc Gottlieb, William N Anderson
BACKGROUND: The impact of a new class of automated digital patient engagement (DPE) platforms on potentially avoidable costs, hospital admissions, and complications after discharge following hip and knee arthroplasties has not been established. METHODS: We conducted a multicenter observational cohort study comparing claims data for potentially avoidable costs, hospital admissions, and complications for 90 days after discharge following hip and knee arthroplasties at 10 practice sites in CA and NV...
December 2, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29212681/ten-year-follow-up-study-of-three-alternative-bearing-surfaces-used-in-total-hip-arthroplasty-in-young-patients-a-prospective-randomised-controlled-trial
#3
RANDOMIZED CONTROLLED TRIAL
A Atrey, S E Ward, A Khoshbin, N Hussain, E Bogoch, E H Schemitsch, J P Waddell
AIMS: We present the ten-year data of a cohort of patients, aged between 18 and 65 years (mean age 52.7 years; 19 to 64), who underwent total hip arthroplasty. Patients were randomised to be treated with a cobalt-chrome (CoCr) femoral head with an ultra-high molecular weight polyethylene (UHMWPE), highly cross-linked polyethylene (XLPE) or ceramic-on-ceramic (CoC) bearing surface. PATIENTS AND METHODS: A total of 102 hips (91 patients) were randomised into the three groups...
December 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/29204499/variance-in-predicted-cup-size-by-2-dimensional-vs-3-dimensional-computerized-tomography-based-templating-in-primary-total-hip%C3%A2-arthroplasty
#4
Feroz A Osmani, Savyasachi Thakkar, Austin Ramme, Ameer Elbuluk, Paul Wojack, Jonathan M Vigdorchik
Background: Preoperative total hip arthroplasty templating can be performed with radiographs using acetate prints, digital viewing software, or with computed tomography (CT) images. Our hypothesis is that 3D templating is more precise and accurate with cup size prediction as compared to 2D templating with acetate prints and digital templating software. Methods: Data collected from 45 patients undergoing robotic-assisted total hip arthroplasty compared cup sizes templated on acetate prints and OrthoView software to MAKOplasty software that uses CT scan...
December 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/29190787/magnification-of-digital-hip-radiographs-differs-between-clinical-workplaces
#5
Jana Hornová, Pavel Růžička, Maroš Hrubina, Eduard Šťastný, Andrea Košková, Petr Fulín, Jiří Gallo, Matej Daniel
Preoperative planning for total hip arthroplasty includes templating on anteroposterior radiographs. It is necessary to consider radiographic magnification in order to scale templates accurately. Studies dealing with hip templating report different values of radiographic magnification. It is not clear if the observed difference in magnification between the studies is caused by variability in studied groups, methodology or instrumentation. We hypothesize that there is a difference in magnification between clinical workplaces...
2017: PloS One
https://www.readbyqxmd.com/read/29173918/evaluation-of-digital-tomosynthesis-reconstruction-algorithms-used-to-reduce-metal-artifacts-for-arthroplasty-a-phantom-study
#6
Tsutomu Gomi, Rina Sakai, Masami Goto, Hidetake Hara, Yusuke Watanabe, Tokuo Umeda
To investigate methods to reduce metal artifacts during digital tomosynthesis for arthroplasty, we evaluated five algorithms with and without metal artifact reduction (MAR)-processing tested under different radiation doses (0.54, 0.47, and 0.33mSv): adaptive steepest descent projection onto convex sets (ASD-POCS), simultaneous algebraic reconstruction technique total variation (SART-TV), filtered back projection (FBP), maximum likelihood expectation maximization (MLEM), and SART. The algorithms were assessed by determining the artifact index (AI) and artifact spread function (ASF) on a prosthesis phantom...
October 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/29156070/medical-crowdfunding-for-patients-undergoing-orthopedic-surgery
#7
Wesley M Durand, Joseph R Johnson, Adam E M Eltorai, Alan H Daniels
Crowdfunding for medical expenses is growing in popularity. Through several websites, patients create public campaign profiles to which donors can contribute. Research on medical crowdfunding is limited, and there have been no studies of crowdfunding in orthopedics. Active medical crowdfunding campaigns for orthopedic trauma, total joint arthroplasty, and spine surgery were queried from a crowdfunding website. The characteristics and outcomes of crowdfunding campaigns were abstracted and analyzed. For this study, 444 campaigns were analyzed, raising a total of $1,443,528...
November 20, 2017: Orthopedics
https://www.readbyqxmd.com/read/29146506/silicone-metacarpophalangeal-arthroplasty-for-osteoarthritis-long-term-results
#8
Nathan T Morrell, Arnold-Peter C Weiss
PURPOSE: To demonstrate that silicone metacarpophalangeal (MCP) arthroplasty provides excellent long-term outcomes with a low complication rate in osteoarthritis patients. METHODS: A consecutive cohort of 35 patients with osteoarthritis of 1 or more MCP joints undergoing anatomically neutral silicone MCP arthroplasty was followed over a 15-year period. Functional outcomes including strength and range of motion (ROM), as well as complications, were recorded. All patients were available for long-term assessment including radiographs and outcomes questionnaire...
November 14, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29099897/reliability-of-3-dimensional-glenoid-component-templating-and-correlation-to-intraoperative-component-selection
#9
Comron Saifi, Manish N Noticewala, R Michael Greiwe, Jonathan D Lester, Thomas R Gardner, Edwin Cadet, William N Levine, Louis U Bigliani, Christopher S Ahmad
Although implant-specific intraoperative targeting devices for glenoid sizing exist, a validated method for preoperatively templating glenoid component size in primary total shoulder arthroplasty (TSA) based on digital imaging does not. We conducted a study to determine if 3-dimensional (3-D) digital imaging could be used for preoperative templating of glenoid component size and to compare templated glenoid sizes with implanted glenoid sizes. We created 3-D digital models from 3 glenoid component implant sizes and preoperative scapular computed tomography scans of 24 patients who underwent primary TSA...
September 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/29094010/restoration-of-the-joint-geometry-and-outcome-after-stemless-tess-shoulder-arthroplasty
#10
Lars V von Engelhardt, Michael Manzke, Andreas Breil-Wirth, Timm J Filler, Joerg Jerosch
AIM: To evaluate the joint geometry and the clinical outcome of stemless, anatomical shoulder arthroplasty with the TESS system. METHODS: Twenty-one shoulders with a mean follow-up 18 of months were included. On scaled digital radiographs the premorbid center of rotation (CoR) was assessed and compared to the CoR of the prosthesis by using the MediCAD(®) software. Additionally, the pre- and post-operative geometry of the CoR was assessed in relation to the glenoid, the acromion as well as to the proximal humerus...
October 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/29069636/development-and-in-vitro-validation-of-a-simplified-numerical-model-for-the-design-of-a-biomimetic-femoral-stem
#11
Bruno Jetté, Vladimir Brailovski, Charles Simoneau, Mathieu Dumas, Patrick Terriault
BACKGROUND: Dense and stiff metallic femoral stems implanted into femurs for total hip arthroplasties produce a stress shielding effect since they modify the original load sharing path in the bony structure. Consequently, in the long term, the strain adaptive nature of bones leads to bone resorption, implant loosening, and the need for arthroplasty revision. The design of new cementless femoral stems integrating open porous structures can reduce the global stiffness of the stems, allowing them a better match with that of bones and provide their firm fixation via bone ingrowth, and, thus reduce the risk of implantation failure...
October 16, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29064004/outpatient-total-joint-arthroplasty
#12
REVIEW
Jack M Bert, Jessica Hooper, Sam Moen
PURPOSE OF REVIEW: Outpatient total joint arthroplasty (OTJA) allows for a safe, cost effective pathway for appropriately selected patients. With current pressures on arthroplasty surgeons and their associated institutions to reduce costs per episode of care, it is important to define the steps and challenges associated with establishing an outpatient arthroplasty program. RECENT FINDINGS: Several studies have outlined techniques of selecting patients suitable for this type of postoperative pathway...
December 2017: Current Reviews in Musculoskeletal Medicine
https://www.readbyqxmd.com/read/29044455/use-of-an-app-controlled-neuromuscular-electrical-stimulation-system-for-improved-self-management-of-knee-conditions-and-reduced-costs
#13
Morad Chughtai, Nicholas Piuzzi, George Yakubek, Anton Khlopas, Nipun Sodhi, Assem A Sultan, Salahuddin Nasir, Benjamin S T Yates, Anil Bhave, Michael A Mont
Patients suffering from quadriceps muscle weakness secondary to osteoarthritis or after surgeries, such as total knee arthroplasty, appear to benefit from the use of neuromuscular electrical stimulation (NMES), which can improve muscle strength and function, range of motion, exercise capacity, and quality of life. Several modalities exist that deliver this therapy. However, with the ever-increasing demand to improve clinical efficiency and costs, digitalize healthcare, optimize data collection, improve care coordination, and increase patient compliance and engagement, newer devices incorporating technologies that facilitate these demands are emerging...
October 12, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/28984654/joint-denervation-in-the-digits-technique-and-patient-satisfaction
#14
Russell J Madsen, Lindsay A Stone, Jeremiah B Knapp, Joel S Solomon
BACKGROUND: Traditional approaches to treating painful osteoarthritis of the fingers include arthrodesis and arthroplasty. Although highly effective for pain control, arthrodesis sacrifices joint motion and can be complicated by nonunion, malunion, and infection.Implant arthroplasty preserves motion but is likewise subject to complications-particularly at the level of the proximal interphalangeal joint. In contrast, finger joint denervation is a simple outpatient procedure that maintains joint motion...
October 3, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28975538/proximal-femoral-anatomy-and-collared-stems-in-hip-arthroplasty-is-a-single-collar-size-sufficient
#15
Nicolas Bonin, Jean-Emmanuel Gedouin, Vincent Pibarot, Jacques Bejui-Hughues, Hugo Bothorel, Mo Saffarini, Cécile Batailler
BACKGROUND: Even if the benefits of collars are unclear, they remain widely used, in several femoral stem designs. This study aimed to determine whether collar size should be proportional to hip dimensions and morphology. The hypothesis was that the collar should be larger for greater stem sizes and for varus femoral necks. METHODS: Computed Tomography scans of 204 healthy hips were digitally analysed and manually templated to determine principle dimensions, appropriate stem size and model, as well as cortical distance at the femoral calcar (ideal collar size)...
October 3, 2017: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/28974403/cementing-technique-affects-the-rate-of-femoral-component-loosening-after-high-flexion-total-knee-arthroplasty
#16
Hyuk-Soo Han, Myung Chul Lee
BACKGROUND: The purpose of this study was to determine the effects of different cementing techniques on the rate of early femoral loosening of high-flexion total knee arthroplasties (TKAs). METHODS: A total of 734 knees from 486 patients treated with high-flexion design TKA between July 2001 and July 2010 were divided into two groups based on the cementing technique used. For 403 knees (group N), cement was applied onto the distal and anterior cut surfaces of the femur and the posterior flanges of the femoral component without pressurization...
December 2017: Knee
https://www.readbyqxmd.com/read/28933329/-mid-term-to-long-term-results-of-revision-total-hip-arthroplasty-using-the-oval-shaped-acetabular-cup-tc-type
#17
E Šťastný, T Trč, J Frýdl, Z Kopečný, T Philippou, J Lisý
INTRODUCTION The purpose of our paper is to evaluate the mid-term to long-term results and to confirm the basic criteria of a high-quality revision implant: safe bridging of bone defects, achievement of reliable primary fixation of revision acetabular cup, achievement of good secondary stability with documentable osteointegration of cup and demonstration of remodelling of transplanted bone tissue in the area of defects and in spaces between the implant ribs. MATERIAL AND METHODS Altogether 36 patients (38 cups) were evaluated who had undergone revision hip arthroplasty in the period from 2004 to 2010...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28900757/low-incidence-of-postoperative-urinary-retention-with-the-use-of-a-nurse-led-bladder-scan-protocol-after-hip-and-knee-arthroplasty-a-retrospective-cohort-study
#18
N P Kort, Y Bemelmans, R Vos, M G M Schotanus
PURPOSE: Postoperative urinary retention (POUR), defined as the inability to empty the bladder voluntary after surgery, is a commonly reported complication. This study reports the incidence and possible risk factors for POUR after elective fast-track hip or knee arthroplasty when using a nurse-led bladder scan protocol. METHODS: This retrospective cohort study included data from 803 patients who underwent unilateral hip or knee arthroplasty. Patients' digital clinical records were reviewed for eligibility...
September 12, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28855192/the-effect-of-implant-position-on-bone-strain-following-lateral-unicompartmental-knee-arthroplasty-a-biomechanical-model-using-digital-image-correlation
#19
A M Ali, S D S Newman, P A Hooper, C M Davies, J P Cobb
OBJECTIVES: Unicompartmental knee arthroplasty (UKA) is a demanding procedure, with tibial component subsidence or pain from high tibial strain being potential causes of revision. The optimal position in terms of load transfer has not been documented for lateral UKA. Our aim was to determine the effect of tibial component position on proximal tibial strain. METHODS: A total of 16 composite tibias were implanted with an Oxford Domed Lateral Partial Knee implant using cutting guides to define tibial slope and resection depth...
August 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28720007/extensor-pollicis-brevis-spiral-tenodesis-for-combined-metacarpophalangeal-instability-and-trapeziometacarpal-arthritis
#20
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
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