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Shoulder arthroplasty

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https://www.readbyqxmd.com/read/28087166/future-surgery-after-revision-shoulder-arthroplasty-the-impact-of-unexpected-positive-cultures
#1
Eric M Padegimas, Cassandra Lawrence, Alexa C Narzikul, Benjamin M Zmistowski, Joseph A Abboud, Gerald R Williams, Surena Namdari
BACKGROUND: The clinical implications and treatment of unexpected positive cultures (UPCs) in revision shoulder arthroplasty are not well defined. The purpose of this study was to describe results of patients with and without UPCs after revision shoulder arthroplasty. METHODS: A single institutional database was used to retrospectively identify all revision shoulder arthroplasties performed between January 1, 2011, and December 31, 2013. Patients with preoperative suspicion of infection were excluded...
January 10, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28087164/anatomic-study-and-electromyographic-analysis-of-the-teres-minor-muscle
#2
Junichiro Hamada, Akimoto Nimura, Kunio Yoshizaki, Keiichi Akita
BACKGROUND: The teres minor muscle is a focused topic on the treatment of massive rotator cuff tears and reverse total shoulder arthroplasty. Its precise anatomy and function have not been completely investigated. The purposes of this study were to anatomically investigate the muscle and analyze electromyographic (EMG) activities during shoulder motion. METHODS: This anatomic study used 20 shoulders from deceased donors (mean age, 75.0 years). EMG data were recorded from 10 healthy volunteers (mean age, 21...
January 10, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28078542/glenoid-baseplate-fixation-using-hybrid-configurations-of-locked-and-unlocked-peripheral-screws
#3
Nathan T Formaini, Nathan G Everding, Jonathan C Levy, Brandon G Santoni, Aniruddh N Nayak, Cooper Wilson
BACKGROUND: The use of peripheral locked screws has reduced glenoid baseplate failure rates in reverse shoulder arthroplasty. However, situations may arise when one or more non-locked screws may be preferred. We aimed to determine if different combinations of locked and non-locked screws significantly alter acute glenoid baseplate fixation in a laboratory setting. MATERIALS AND METHODS: Twenty-eight polyurethane trabecular bone surrogates were instrumented with a center screw-type glenoid baseplate and fixated with various combinations of peripheral locked and non-locked screws (1-, 2-, 3- and 4-locked con)...
January 11, 2017: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/28076600/use-of-cuff-tear-arthroplasty-head-prosthesis-for-rotator-cuff-arthropathy-treatment-in-elderly-patients-with-comorbidities
#4
Cassiano Diniz Carvalho, Carlos Vicente Andreoli, Alberto de Castro Pochini, Benno Ejnisman
Objective: To evaluate the clinical and functional behavior of patients undergoing cuff tear arthroplasty at different stages of the disease. Methods: Cuff tear arthroplasty hemiarthroplasties were performed in 34 patients with rotator cuff arthropathy and associated comorbidities, classified according to Seebauer. The mean age was 76.3 years, and the sample comprised 23 females (67.6%) and 11 males (32.4%). The mean follow-up period was 21.7 months, and evaluations were performed using the Visual Analog Scale for pain and the Constant scale...
October 2016: Einstein
https://www.readbyqxmd.com/read/28075438/quantitative-anatomical-differences-in-the-shoulder
#5
Usman Ali Mohammed Syed, Daniel E Davis, Jia-Wei Ko, Brian K Lee, Daniel Huttman, Adam Seidl, Carl Deirmengian, Joseph A Abboud
This study explored the radiographic and anatomical differences in normal shoulders between men and women, as well as factors such as race, height, weight, and age. A total of 205 patients with documented normal anatomical radiographs comprised the study population. Five fellowship-trained orthopedic surgeon reviewers measured head diameter, humeral head size, head to tuberosity distance, greater tuberosity width, neck-shaft angle, surface-arc angle, glenoid neck length, and distance from the lateral acromion process to the greater tuberosity on anteroposterior radiographs with the shoulder in external rotation...
January 11, 2017: Orthopedics
https://www.readbyqxmd.com/read/28068966/glenoid-morphology-in-light-of-anatomical-and-reverse-total-shoulder-arthroplasty-a-dissection-and-3d-ct-based-study-in-male-and-female-body-donors
#6
Sandra Mathews, Marco Burkhard, Nabil Serrano, Karl Link, Martin Häusler, Nakita Frater, Ingeborg Franke, Helena Bischofberger, Florian M Buck, Dominic Gascho, Michael Thali, Steffen Serowy, Magdalena Müller-Gerbl, Gareth Harper, Ford Qureshi, Thomas Böni, Hans-Rudolf Bloch, Oliver Ullrich, Frank-Jakobus Rühli, Elisabeth Eppler
BACKGROUND: Placement of the glenoid baseplate is of paramount importance for the outcome of anatomical and reverse total shoulder arthroplasty. However, the database around glenoid size is poor, particularly regarding small scapulae, for example, in women and smaller individuals, and is derived from different methodological approaches. In this multimodality cadaver study, we systematically examined the glenoid using morphological and 3D-CT measurements. METHODS: Measurements of the glenoid and drill hole tunnel length for superior baseplate screw placement were recorded to define size of the glenoid and the distance to the scapular notch on cadaveric specimens...
January 10, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28065478/a-comparison-of-the-open-reduction-internal-fixation-and-resection-arthroplasty-techniques-in-treatment-of-mason-type-3-radial-head-fractures
#7
Yunus Emre Akman, Erhan Sukur, Esra Circi, Osman Nuri Ozyalvac, Fatih Ozyer, Yusuf Ozturkmen
OBJECTIVE: The aim of this study was to retrospectively compare a series of patients surgically treated with ORIF or early resection arthroplasty due to isolated comminuted radial head fractures. METHODS: Between the years 2009 and 2013, 34 patients with isolated comminuted fractures of the radial head (Mason Type 3) had been operated (ORIF in 19 patients, resection arthroplasty in 15 patients). The mean age of the patients in the ORIF group was 38.5 years and 54 years in the resection group...
January 5, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/28064003/a-semi-automated-quantitative-ct-method-for-measuring-rotator-cuff-muscle-degeneration-in-shoulders-with-primary-osteoarthritis
#8
Alexandre Terrier, Julien Ston, Antoine Dewarrat, Fabio Becce, Alain Farron
BACKGROUND: Rotator cuff muscle degeneration is an important parameter to consider when planning shoulder arthroplasty. HYPOTHESIS: We hypothesized that rotator cuff muscle degeneration is correlated with scapulohumeral subluxation in patients planned for anatomical total shoulder arthroplasty (TSA). MATERIALS AND METHODS: We developed a semi-automated quantitative CT method to measure rotator cuff muscle degeneration, and retrospectively analyzed 107 preoperative shoulder CT scans of patients with primary osteoarthritis...
January 4, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28060054/patient-reported-and-objectively-measured-function-before-and-after-reverse-shoulder-arthroplasty
#9
Wendy J Hurd, Melissa M Morrow, Emily J Miller, Robert A Adams, John W Sperling, Kenton R Kaufman
BACKGROUND AND PURPOSE: Documenting functional outcomes after reverse shoulder arthroplasty (RSA) is critical to advancing patient care. The interplay been self-reported and objectively measured outcome measures has not been widely described. The utilization of wearable devices to document upper extremity limb activity is a new approach for objectively measuring outcomes. Therefore, the purpose of this study was to evaluate changes in pain, and self-reported function and objectively measured limb activity after RSA...
January 5, 2017: Journal of Geriatric Physical Therapy
https://www.readbyqxmd.com/read/28050640/is-the-humeral-stem-useful-in-anatomic-total-shoulder-arthroplasty
#10
Philippe Collin, Tetsu Matsukawa, Pascal Boileau, Ulrich Brunner, Gilles Walch
PURPOSE: Traditionally and since Neer, the humeral side of shoulder arthroplasty consisted of a stemmed component but the real need for stem fixation in total shoulder arthroplasty (TSA) has barely been investigated. The current study evaluated the clinical and radiological outcomes with a stemless TSA. METHODS: Forty-seven patients, 20 female and 27 male patients with an average age of 63, were selected in four orthopaedic centres during a four year period, and implanted with a humeral head prosthesis with a three-fin design and titanium coating...
January 3, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28038912/effect-of-lateralized-design-on-muscle-and-joint-reaction-forces-for-reverse-shoulder-arthroplasty
#11
William Liou, Yang Yang, Graysen R Petersen-Fitts, Daniel J Lombardo, Sasha Stine, Vani J Sabesan
BACKGROUND: Manufacturers of reverse shoulder arthroplasty (RSA) implants have recently designed innovative implants to optimize performance in rotator cuff-deficient shoulders. These advancements are not without tradeoffs and can have negative biomechanical effects. The objective of this study was to develop an integrated finite element analysis-kinematic model to compare the muscle forces and joint reaction forces (JRFs) of 3 different RSA designs. METHODS: A kinematic model of a normal shoulder joint was adapted from the Delft model and integrated with the well-validated OpenSim shoulder model...
December 27, 2016: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28034540/reverse-shoulder-arthroplasty-in-patients-younger-than-55-years-2-to-12-year-follow-up
#12
Randall J Otto, Rachel E Clark, Mark A Frankle
BACKGROUND: This study reports the outcomes of reverse shoulder arthroplasty (RSA) in patients younger than 55 years with midterm to long-term follow-up. METHODS: Sixty-seven patients (average age, 47.9 years; range, 21-54 years) were identified who underwent RSA with an average 62.3 months of follow-up (24-144 months). There were 35 patients (group 1) who had a failed arthroplasty and 32 patients (group 2) who underwent primary RSA. Clinical outcomes included the American Shoulder and Elbow Surgeons (ASES) score, Simple Shoulder Test (SST) score, and range of motion...
December 26, 2016: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28032697/patient-specific-orthopaedic-implants
#13
REVIEW
Jack M Haglin, Adam E M Eltorai, Joseph A Gil, Stephen E Marcaccio, Juliana Botero-Hincapie, Alan H Daniels
Patient-specific orthopaedic implants are emerging as a clinically promising treatment option for a growing number of conditions to better match an individual's anatomy. Patient-specific implant (PSI) technology aims to reduce overall procedural costs, minimize surgical time, and maximize patient outcomes by achieving better biomechanical implant fit. With this commercially-available technology, computed tomography or magnetic resonance images can be used in conjunction with specialized computer programs to create preoperative patient-specific surgical plans and to develop custom cutting guides from 3-D reconstructed images of patient anatomy...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28029391/off-hour-surgery-among-orthopedic-subspecialties-at-an-urban-quaternary-care-level-1-trauma-center
#14
Amanda Lans, Stein J Janssen, David Ring
PURPOSE: We sought to determine and quantify which subspecialties of orthopedic surgeons are operating off hours in an urban, quaternary-care, level 1 trauma center. MATERIALS AND METHODS: We used our clinical registry to identify 43,211 orthopedic surgeries performed between January 2008 and December 2011. Our outcome measures were the number and proportion of off-hour surgeries performed as well as the number and proportion of off-hours per subspecialty. The denominators were the total number of surgeries and the total number of surgical hours worked per subspecialty...
October 28, 2016: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28024662/quantifying-the-competing-relationship-between-adduction-range-of-motion-and-baseplate-micromotion-with-lateralization-of-reverse-total-shoulder-arthroplasty
#15
Josie Elwell, Joseph Choi, Ryan Willing
Lateralizing the center of rotation (COR) of reverse total shoulder arthroplasty (rTSA) could improve functional outcomes and mitigate scapular notching, a commonly occurring complication of the procedure. However, resulting increases in torque at the bone-implant interface may negatively affect initial fixation of the glenoid-side component, especially if only two fixation screws can be placed. Shoulder-specific finite element (FE) models of four fresh-frozen cadaveric shoulders were constructed. Scapular geometry and material property distributions were derived from CT data...
November 29, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/28005111/instability-after-reverse-total-shoulder-arthroplasty-which-patients-dislocate
#16
Eric M Padegimas, Benjamin M Zmistowski, Camilo Restrepo, Joseph A Abboud, Mark D Lazarus, Matthew L Ramsey, Gerald R Williams, Surena Namdari
Given the increasing use of reverse total shoulder arthroplasty (RTSA), it is important to study the complications associated with this procedure. We conducted a study of the incidence, predisposing factors, and treatment of RTSA dislocations. Using our institutional database, we retrospectively searched for RTSAs performed between September 27, 2010 and December 31, 2013 and identified postoperative dislocations. Four hundred eighty-seven patients underwent 510 RTSAs (393 primary, 117 revision). Fourteen patients had 15 dislocations (5 in primary RTSAs, 10 in revision RTSAs)...
November 2016: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28005096/liposomal-bupivacaine-vs-interscalene-nerve-block-for-pain-control-after-shoulder-arthroplasty-a-retrospective-cohort-analysis
#17
Casey V Hannan, Matthew J Albrecht, Steve A Petersen, Uma Srikumaran
The aim of this study was to compare liposomal bupivacaine and interscalene nerve block (ISNB) for analgesia after shoulder arthroplasty. We compared 37 patients who received liposomal bupivacaine vs 21 who received ISNB after shoulder arthroplasty by length of hospital stay (LOS), opioid consumption, and postoperative pain. Pain was the same in both groups for time intervals of 1 hour and 8 to 14 hours postoperatively. Compared with ISNB patients, liposomal bupivacaine patients reported less pain at 18 to 24 hours (P = ...
November 2016: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28002380/propionibacterium-we-found-it-now-we-have-to-deal-with-it-commentary-on-an-article-by-jason-e-hsu-md-et-al-single-stage-revision-is-effective-for-failed-shoulder-arthroplasty-with-positive-cultures-for-propionibacterium
#18
Philipp Moroder, Andrej Trampuz, Markus Scheibel
No abstract text is available yet for this article.
December 21, 2016: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28002370/distinct-proximal-humeral-geometry-in-chinese-population-and-clinical-relevance
#19
Qiang Zhang, Lewis L Shi, Krishna C Ravella, Jason L Koh, Shaobai Wang, Cailong Liu, Guoan Li, Jianhua Wang
BACKGROUND: Replicating humeral anatomy during shoulder arthroplasty is important for good patient outcomes. The proximal humeral geometry of the Chinese population has been rarely reported. We analyzed the geometry of the proximal part of the humerus in Chinese subjects and compared it with that of Western populations and the dimensions of available prostheses. METHODS: Eighty healthy Chinese subjects underwent computed tomography (CT)-arthrography. Three-dimensional (3D) digital humeral and glenoid models were reconstructed, and geometric parameters were measured...
December 21, 2016: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28002367/single-stage-revision-is-effective-for-failed-shoulder-arthroplasty-with-positive-cultures-for-propionibacterium
#20
Jason E Hsu, Jacob D Gorbaty, Ian J Whitney, Frederick A Matsen
BACKGROUND: Revision shoulder arthroplasties are often culture-positive for Propionibacterium. This study tests the hypothesis that the functional outcomes of revising Propionibacterium culture-positive failed arthroplasties with a single-stage revision and immediate antibiotic therapy are not inferior to the clinical outcomes of revising failed shoulder arthroplasties that are not culture-positive. METHODS: Fifty-five shoulders without obvious clinical evidence of infection had a single-stage revision arthroplasty...
December 21, 2016: Journal of Bone and Joint Surgery. American Volume
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