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https://www.readbyqxmd.com/read/29975263/scapular-notching-after-reverse-total-shoulder-arthroplasty-prediction-using-patient-specific-osseous-anatomy-implant-location-and-shoulder-motion
#1
Joel Kolmodin, Iyooh U Davidson, Bong Jae Jun, Nipun Sodhi, Naveen Subhas, Thomas E Patterson, Zong-Ming Li, Joseph P Iannotti, Eric T Ricchetti
BACKGROUND: Scapular notching is frequently observed following reverse total shoulder arthroplasty (rTSA), although the etiology is not well understood. METHODS: Twenty-nine patients with preoperative computed tomography (CT) scans who underwent rTSA with a Grammont design were evaluated after a minimum of 2 years of follow-up with video motion analysis (VMA), postoperative three-dimensional (3D) CT, and standard radiographs. The glenohumeral range of motion demonstrated by the VMA and the postoperative implant location on the CT were used in custom simulation software to determine areas of osseous impingement between the humeral implant and the scapula and their relationship to scapular notching on postoperative CT...
July 5, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29913030/lateralized-center-of-rotation-and-lower-neck-shaft-angle-are-associated-with-lower-rates-of-scapular-notching-and-heterotopic-ossification-and-improved-pain-for-reverse-shoulder-arthroplasty-at-1-year
#2
Ryan Nelson, Jeremiah T Lowe, Sarah M Lawler, Megan Fitzgerald, Matthew T Mantell, Andrew Jawa
Heterotopic ossification and scapular notching are common following reverse total shoulder arthroplasty. Compared with the original Grammont-style prosthesis with a medialized center of rotation (COR) and a 155° neck-shaft angle, lateralization of COR and reduction of neck-shaft angle have been associated with decreased incidence of scapular notching. The authors hypothesized that these design features may also be effective in reducing heterotopic ossification after reverse total shoulder arthroplasty. Ninety-seven consecutive patients who underwent reverse total shoulder arthroplasty performed by a single surgeon were included in the study...
July 1, 2018: Orthopedics
https://www.readbyqxmd.com/read/29665605/-shoulder-arthroplasty
#3
Anna Krukenberg, Jan-Philipp Imiolczyk, Philipp Moroder, Markus Scheibel
Shoulder arthroplasty has been performed increasingly during the last years. The concept of modern anatomic shoulder arthroplasty is based on C. S. Neer's first shoulder prosthesis in the 1950s which was originally designed for the treatment of fractures of the proximal humerus. Since then, this monoblock prosthesis has undergone many changes and improvements. By now, an anatomic reconstruction of the joint is possible. Hence, the indications for anatomic shoulder arthroplasty have been added amongst others by osteoarthritis, necrosis, rheumatoid arthritis or posttraumatic arthritis...
April 2018: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/29290604/grammont-humeral-design-versus-onlay-curved-stem-reverse-shoulder-arthroplasty-comparison-of-clinical-and-radiographic-outcomes-with-minimum-2-year-follow-up
#4
Giovanni Merolla, Gilles Walch, Francesco Ascione, Paolo Paladini, Elisabetta Fabbri, Antonio Padolino, Giuseppe Porcellini
BACKGROUND: There are few investigations comparing lateralized and medialized reverse total shoulder arthroplasty (RTSA) in patients with cuff tear arthropathy. This study assessed the outcomes of 2 RTSA designs. METHODS: Sixty-eight consecutive cuff tear arthropathy patients (74 shoulders) with a follow-up of at least 24 months received a Grammont or an onlay curved short-stem humeral component, with or without glenoid lateralization; a cementless humeral stem was implanted in >90%...
April 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29152004/shoulder-arthroplasty-historical-considerations
#5
REVIEW
Sébastien Zilber
Background: The first articular metal prosthesis was implanted in the shoulder more than 120 years ago. The aim of this paper is to report shoulder arthroplasty evolution during this time thru the literature of the twentieth century. Methods: A literature review was performed selecting the founding papers about shoulder arthroplasty. Results: After being almost forgotten during the first part of the 20th century, various implants were introduced in the 1950s with Charles Neer as a leader...
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/29038305/variations-in-basement-membrane-mechanics-are-linked-to-epithelial-morphogenesis
#6
Julien Chlasta, Pascale Milani, Gaël Runel, Jean-Luc Duteyrat, Leticia Arias, Laurie-Anne Lamiré, Arezki Boudaoud, Muriel Grammont
The regulation of morphogenesis by the basement membrane (BM) may rely on changes in its mechanical properties. To test this, we developed an atomic force microscopy-based method to measure BM mechanical stiffness during two key processes in Drosophila ovarian follicle development. First, follicle elongation depends on epithelial cells that collectively migrate, secreting BM fibrils perpendicularly to the anteroposterior axis. Our data show that BM stiffness increases during this migration and that fibril incorporation enhances BM stiffness...
December 1, 2017: Development
https://www.readbyqxmd.com/read/28735843/does-arm-lengthening-affect-the-functional-outcome-in-onlay-reverse-shoulder-arthroplasty
#7
Birgit S Werner, Francesco Ascione, Giulia Bugelli, Gilles Walch
BACKGROUND: The concept of onlay design reverse shoulder arthroplasty has been introduced to overcome complications observed with the traditional Grammont-type prosthesis. The aim of this study was to determine the influence of arm lengthening on the short-term clinical outcome in onlay reverse shoulder arthroplasty and investigate the effect of humeral tray offset positioning on arm lengthening and range of motion. METHODS: We retrospectively evaluated 56 patients undergoing reverse shoulder arthroplasty with the Aequalis Ascend Flex prosthesis (Tornier, Bloomington, MN, USA) at a minimum 2 years' follow-up...
December 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28456817/erratum-to-medial-patellofemoral-ligament-mpfl-reconstruction-in-combination-with-a-modified-grammont-technique-leads-to-favorable-mid-term-results-in-adolescents-with-recurrent-patellofemoral-dislocations
#8
Helmut Wegmann, Christoph Würnschimmel, Tanja Kraus, Georg Singer, Robert Eberl, Holger Till, Matthias Sperl
No abstract text is available yet for this article.
March 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28291177/long-term-outcomes-of-reverse-total-shoulder-arthroplasty-a-follow-up-of-a-previous-study
#9
Guillaume Bacle, Laurent Nové-Josserand, Pascal Garaud, Gilles Walch
BACKGROUND: Despite the increasing numbers of reverse total shoulder arthroplasty (RTSA) procedures, the long-term results have been rarely reported. We previously reported early outcomes of a cohort of patients treated with a Grammont-style RTSA. The purpose of this study was to evaluate the outcomes after a minimum of 10 years, and to document prosthetic survival and complications. METHODS: Clinical outcome assessment was based on the absolute and relative Constant scores and the active range of motion...
March 15, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28210789/medial-patellofemoral-ligament-mpfl-reconstruction-in-combination-with-a-modified-grammont-technique-leads-to-favorable-mid-term-results-in-adolescents-with-recurrent-patellofemoral-dislocations
#10
Helmut Wegmann, Christoph Würnschimmel, Tanja Kraus, Georg Singer, Robert Eberl, Holger Till, Matthias Sperl
PURPOSE: The aim of the present study is to present the outcome of a cohort of adolescent patients with trochlear dysplasia and elevated tibial tuberosity trochlear groove (TTTG) distance suffering from recurrent patellar dislocation. Treatment consisted of medial patellofemoral ligament (MPFL) reconstruction and a modified Grammont procedure. METHODS: MRI examinations were obtained pre- and postoperatively. Trochlear dysplasia was classified according to Déjour, and TTTG was measured on MRI...
March 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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...
April 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/27900271/prosthetic-design-of-reverse-shoulder-arthroplasty-contributes-to-scapular-notching-and-instability
#12
Gazi Huri, Filippo Familiari, Nima Salari, Steve A Petersen, Mahmut Nedim Doral, Edward G McFarland
AIM: To evaluate whether implant design, glenoid positioning, and other factors influenced instability and scapular notching in reverse total shoulder arthroplasty. METHODS: We retrospectively reviewed records of patients who had undergone reverse total shoulder arthroplasty by the senior author from July 2004 through October 2011 and who had at least 24 mo of follow-up. The 58 patients who met the criteria had 65 arthroplasties: 18 with a Grammont-type prosthesis (Grammont group) and 47 with a lateral-based prosthesis (lateral-design group)...
November 18, 2016: World Journal of Orthopedics
https://www.readbyqxmd.com/read/27583112/influence-of-glenosphere-design-on-outcomes-and-complications-of-reverse-arthroplasty-a-systematic-review
#13
REVIEW
Cassandra Lawrence, Gerald R Williams, Surena Namdari
BACKGROUND: Different implant designs are utilized in reverse shoulder arthroplasty. The purpose of this systematic review was to evaluate the results of reverse shoulder arthroplasty using a traditional (Grammont) prosthesis and a lateralized prosthesis for the treatment of cuff tear arthropathy and massive irreparable rotator cuff tears. METHODS: A systematic review of the literature was performed via a search of two electronic databases. Two reviewers evaluated the quality of methodology and retrieved data from each included study...
September 2016: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/27049187/scapular-notching
#14
David Dare, Joshua S Dines, Collin Tebo, T Bradley Edwards, Edward V Craig, David M Dines
Developed in 1985, the Grammont-style reverse total shoulder arthroplasty offered a biomechanical advantage for the deltoid muscle as well as predictably reduced pain and improved shoulder function in rotator cuff-deficient shoulders. Despite favorable outcomes, reverse total shoulder arthroplasty is associated with a unique set of complications, one of which is scapular notching. Scapular notching is believed to be a result of mechanical impingement of the humeral component on the lateral scapular pillar. Although it appears that scapular notching progresses with time, its effect on implant survivorship and clinical outcomes is unknown...
2016: Instructional Course Lectures
https://www.readbyqxmd.com/read/26814051/area-specific-development-of-distinct-projection-neuron-subclasses-is-regulated-by-postnatal-epigenetic-modifications
#15
Kawssar Harb, Elia Magrinelli, Céline S Nicolas, Nikita Lukianets, Laura Frangeul, Mariel Pietri, Tao Sun, Guillaume Sandoz, Franck Grammont, Denis Jabaudon, Michele Studer, Christian Alfano
During cortical development, the identity of major classes of long-distance projection neurons is established by the expression of molecular determinants, which become gradually restricted and mutually exclusive. However, the mechanisms by which projection neurons acquire their final properties during postnatal stages are still poorly understood. In this study, we show that the number of neurons co-expressing Ctip2 and Satb2, respectively involved in the early specification of subcerebral and callosal projection neurons, progressively increases after birth in the somatosensory cortex...
January 27, 2016: ELife
https://www.readbyqxmd.com/read/26652330/medialized-versus-lateralized-center-of-rotation-in-reverse-shoulder-arthroplasty
#16
Jonathan J Streit, Yousef Shishani, Reuben Gobezie
Reverse shoulder arthroplasty may be performed using components that medialize or lateralize the center of rotation. The purpose of this prospective study was to directly compare 2 reverse shoulder arthroplasty designs. Two treatment groups and 1 control group were identified. Group I comprised 9 patients using a medialized Grammont-style (GRM) prosthesis with a neck-shaft angle of 155°. Group II comprised 9 patients using a lateralized (LAT) prosthesis with a neck-shaft angle of 135°. Pre- and postoperative assessment of range of motion, American Shoulder and Elbow Surgeons score, and visual analog scale pain score were performed...
December 2015: Orthopedics
https://www.readbyqxmd.com/read/26631194/optimizing-deltoid-efficiency-with-reverse-shoulder-arthroplasty-using-a-novel-inset-center-of-rotation-glenosphere-design
#17
Christopher P Roche, Matthew A Hamilton, Phong Diep, Thomas W Wright, Pierre-Henri Flurin, Joseph D Zuckerman, Howard D Routman
INTRODUCTION: Paul Grammont's hemispherical gleno sphere concept medializes the center of rotation (CoR) to the glenoid face to increase deltoid abductor moment arms and improve muscle efficiency. Reducing glenosphere thickness to less than half its spherical radius further medializes the CoR and offers the potential for even greater improvements in efficiency. To that end, this study quantifies deltoid abducttor moment arms for six different rTSA prostheses during scapular abduction from 0° to 140°...
December 2015: Bulletin of the Hospital for Joint Diseases
https://www.readbyqxmd.com/read/26631191/role-of-subscapularis-repair-on-muscle-force-requirements-with-reverse-shoulder-arthroplasty
#18
Matthew L Hansen, Aniruddh Nayak, Madusudanan Sathia Narayanan, Kellen Worhacz, Richard Stowell, Marc C Jacofsky, Christopher P Roche
Concomitant repair of the subscapularis with reverse shoulder arthroplasty (rTSA) is controversial. To evaluate the biomechanical impact of subscapularis repair with rTSA, a cadaveric shoulder controller quantified the muscle forces required to elevate the arm during scapular abduction with the elbow flexed at 90°. The results of this study demonstrate that concomitant subscapularis repair with rTSA creates a biomechanically unfavorable condition during arm elevation. Specifically, repair of the subscapularis significantly increased the force required by the deltoid and posterior rotator cuff and also significantly increased the joint reaction force relative to when the subscapularis was not repaired...
December 2015: Bulletin of the Hospital for Joint Diseases
https://www.readbyqxmd.com/read/26381907/effect-of-humeral-stem-design-on-humeral-position-and-range-of-motion-in-reverse-shoulder-arthroplasty
#19
Alexandre Lädermann, Patrick J Denard, Pascal Boileau, Alain Farron, Pierric Deransart, Alexandre Terrier, Julien Ston, Gilles Walch
PURPOSE: The impacts of humeral offset and stem design after reverse shoulder arthroplasty (RSA) have not been well-studied, particularly with regard to newer stems which have a lower humeral inclination. The purpose of this study was to analyze the effect of different humeral stem designs on range of motion and humeral position following RSA. METHODS: Using a three-dimensional computer model of RSA, a traditional inlay Grammont stem was compared to a short curved onlay stem with different inclinations (155°, 145°, 135°) and offset (lateralised vs medialised)...
November 2015: International Orthopaedics
https://www.readbyqxmd.com/read/25950544/assessment-of-scapular-morphology-and-surgical-technique-as-predictors-of-notching-in-reverse-shoulder-arthroplasty
#20
Vani Sabesan, Mark Callanan, Vinay Sharma, J Michael Wiater
There has been increased focus on understanding risk factors for scapular notching in reverse shoulder arthroplasty (RSA). We conducted a study to evaluate the scapular notching index and other factors associated with the occurrence of scapular notching. Ninety-one patients treated with primary RSA were followed for a minimum of 24 months. Patients' radiographic assessments were grouped by Nerot grade of scapular notching (group 1, grades 0 and 1; group 2, grades 2, 3, 4). Group mean differences were compared for preoperative scapular neck angle (SNA), prosthesis-scapular neck angle (PSNA), peg glenoid rim distance (PGRD), notching index, and clinical outcomes...
May 2015: American Journal of Orthopedics
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