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https://www.readbyqxmd.com/read/30624265/spect-ct-findings-in-scapular-notching-after-reverse-shoulder-arthroplasty
#1
Matthaeus Cieciera, Ralf Schoeniger, Ujwal Bhure, Klaus Strobel
Scapular notching (SN) is a unique complication in reverse shoulder arthroplasty, caused by repetitive impingement of the humeral polyethylene liner against the inferior scapular neck. It occurs in up to 96% of cases, with bone loss beneath the glenoid baseplate and polyethylene wear. SN can be associated with pain, decreased range of motion, and might result in glenoid implant failure. Modification of glenosphere design and humeral neck angle showed substantially less SN. SPECT/CT is a promising tool providing combined morphologic and metabolic information in symptomatic SN...
January 4, 2019: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/30602631/comparative-analysis-of-sagittal-condylar-guidance-recorded-by-intraoral-gothic-arch-tracing-and-panoramic-radiograph-in-completely-edentulous-patients
#2
Pallavi Sirana, Narendra Kumar, Anshu Malhotra, Nandini Singhal, Nisha Chaudhary
AIM: To compare the intraoral gothic tracing method with panoramic radiographs in patients requiring complete dentures. MATERIALS AND METHODS: The present study was conducted on 20 edentulous subjects of both genders. Hanau Wide-Vue semi-adjustable articulator was used to record sagittal condylar guidance in all patients. Panoramic radiographs were taken in all patients and Frankfurt horizontal plane was traced on both sides of orthopantomogram (OPG) and second plane was marked by joining the most superior and most inferior point on the glenoid fossa curvature...
November 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/30581129/cement-augmentation-of-glenoid-baseplate-screws-does-not-improve-primary-stability-in-reversed-shoulder-arthroplasty-a-cadaveric-study
#3
Benjamin Bockmann, Martin Bäumlein, Rainer Koch, Jens Figiel, Philipp Lechler, René Aigner, Christopher Bliemel, Ludwig Oberkircher, Steffen Ruchholtz, Michael Frink
INTRODUCTION: Cuff tear arthritis and complex proximal humeral fractures are common pathologies that are frequently addressed by the implantation of a reversed shoulder prosthesis. The present cadaveric study aimed to analyze the effect of cement augmentation of the glenoid component on the primary stability in geriatric patients. HYPOTHESIS: Cement augmentation of glenoid baseplate screws has an influence on primary stability in reversed shoulder arthroplasty (RSA)...
December 20, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/30573432/influence-of-humeral-abduction-angle-on-axial-rotation-and-contact-area-at-the-glenohumeral-joint
#4
Wataru Sahara, Takaharu Yamazaki, Shoji Konda, Kazuomi Sugamoto, Hideki Yoshikawa
BACKGROUND: Although the elevation angle of the arm affects the range of rotation, it has not been evaluated up to the maximal abduction angle. In this study we conducted an evaluation up to maximal abduction and determined the contact patterns at the glenohumeral (GH) joint. METHODS: Fourteen healthy volunteers (12 men and 2 women; mean age, 26.9 years) with normal shoulders (14 right and 8 left) were instructed to rotate their shoulders at 0°, 90°, 135°, and maximal abduction for each shoulder at a time...
December 17, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/30509611/risk-factors-for-anterior-shoulder-instability-a-matched-case-control-study
#5
Jianqiao Hong, Yiting Huang, Chiyuan Ma, Guoxin Qu, Jiahong Meng, Haobo Wu, Mingmin Shi, Yangxin Wang, Chenhe Zhou, Zexin Chen, Shigui Yan, Wei Wang
BACKGROUND: Anatomic skeletal features of the shoulder play important roles in anterior shoulder dislocation. However, studies on the effect of the humeral structure are few. This case-control study aimed to analyze the risk factors of anterior shoulder instability, including glenoid and humeral factors. METHODS: Anterior shoulder instability was found in 64 of 10,035 individuals who underwent magnetic resonance imaging. Propensity score matching was used to select controls matched for age, sex, height, and weight...
November 30, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/30509606/factors-contributing-to-glenoid-baseplate-micromotion-in-reverse-shoulder-arthroplasty-a-biomechanical-study
#6
Tiffany S Lung, David Cruickshank, Heather J Grant, Michael J Rainbow, Timothy J Bryant, Ryan T Bicknell
BACKGROUND: Reverse shoulder arthroplasty (RSA) is typically performed in patients with cuff tear arthropathy. A common type of RSA baseplate has a central peg and 4 peripheral screws inserting into the glenoid surface. Baseplate failure is a significant postoperative complication that reduces prosthetic longevity and usually requires revision surgery. This study evaluated the contribution of mechanical factors on initial baseplate fixation. MATERIALS AND METHODS: This study simulated glenoid baseplate loading in a RSA...
November 30, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/30503179/the-critical-shoulder-angle-can-it-be-sufficient-to-reflect-the-shoulder-joint-without-the-humeral-head
#7
Sung-Min Rhee, Jung Youn Kim, Jae Yoon Kim, Seong Jin Cho, Jae Hyung Kim, Yong Girl Rhee
HYPOTHESIS: We hypothesized that a new method considering the humeral head would distinguish rotator cuff tears (RCTs) and osteoarthritis (OA) better than the critical shoulder angle (CSA). METHODS: A total of 1011 patients were tested in this study and divided into 4 groups: those with RCTs (n = 493), those with OA (n = 73), those with anterior instability (n = 361), and those with adhesive capsulitis (n = 84). The CSA and new radiologic parameters including the humeral head were measured in the true anterior-to-posterior view: the Y angle connecting the lower end of the glenoid (LG), the center of the humeral head (CH), and the upper end of the glenoid (UG); the G angle connecting UG, CH, and the lateral tip of the acromion; the YG angle connecting LG, CH, and the lateral tip of the acromion; and the R angle connecting UG, LG, and CH...
November 30, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/30484184/evaluation-of-condyle-position-in-patients-with-angle-class-i-ii-and-iii-malocclusion-using-cone-beam-computed-tomography-panoramic-reconstructions
#8
Aslıhan Akbulut, Delal Dara Kılınç
OBJECTIVES: This study was performed to compare the positions of the right and left condyles between male and female patients with different Angle malocclusions using cone-beam computed tomography (CBCT) panoramic reconstructions. METHODS: The CBCT images of 60 patients (age of 18-37 years) were retrospectively evaluated. The patients were divided according to their Angle malocclusion classifications (Angle Classes I, II, and III). The condyle-to-eminence, condyle-to-fossa, and condyle-to-meatus distances were measured digitally using i-CAT software...
March 21, 2018: Oral Radiology
https://www.readbyqxmd.com/read/30374569/posterior-open-wedge-glenoid-osteotomy-provides-reliable-results-in-young-patients-with-increased-glenoid-retroversion-and-posterior-shoulder-instability
#9
Lucca Lacheta, Taran S P Singh, Jean M Hovsepian, Sepp Braun, Andreas B Imhoff, Jonas Pogorzelski
PURPOSE: The relationship between posterior shoulder instability and increased glenoid retroversion has been documented. Posterior open wedge glenoid osteotomy is a possible treatment option for patients with increased glenoid retroversion, but outcomes in the literature are limited. Therefore, the purpose of this study was to report the clinical and radiological outcomes following posterior glenoid osteotomy. METHODS: Patients that underwent posterior glenoid osteotomy for posterior shoulder instability with a GR angle of more than or equal to 10°, and were at least 12 months out from surgery, were included in the study...
October 29, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/30332921/condylar-long-axis-and-articular-eminence-in-mri-in-patients-with-temporomandibular-disorders
#10
Maria Grazia Piancino, Michele Tepedino, Francesco Cavarra, Ennio Bramanti, Giuseppina Laganà, Claudio Chimenti, Stefano Cirillo
OBJECTIVE: To compare morphologic findings in MRI and skeletal divergence of a group of patients with temporomandibular joint disorders (TMD) subdivided into condylar symmetric and asymmetric. METHODS: Fifty-nine adults (26.7 years old) with TMD were retrospectively recruited. Condylar height symmetry was evaluated by orthopantomography (Habets's method) and used to divide patients into Symmetric and Asymmetric groups; skeletal divergence was assessed on lateral cephalograms...
October 17, 2018: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/30328484/multilevel-glenoid-morphology-and-retroversion-assessment-in-walch-b2-and-b3-types
#11
Mohammad Samim, Mandeep Virk, David Mai, Kamran Munawar, Joseph Zuckerman, Soterios Gyftopoulos
OBJECTIVE: A major factor that impacts the long-term outcome and complication rates of total shoulder arthroplasty is the preoperative posterior glenoid bone loss quantified by glenoid retroversion. The purpose of this study was to assess if glenoid retroversion varies significantly at different glenoid heights in Walch B2 and B3 glenoids. MATERIALS AND METHODS: Patients with B2 and B3 glenoid types were included following retrospective review of 386 consecutive CT shoulder studies performed for arthroplasty preoperative planning...
October 17, 2018: Skeletal Radiology
https://www.readbyqxmd.com/read/30316165/biomechanical-effects-of-position-and-angle-of-insertion-for-all-suture-anchors-in-arthroscopic-bankart-repair
#12
Jae-Hoo Lee, Yasuo Itami, Bobak Hedayati, Benjamin Bitner, Michelle H McGarry, Thay Q Lee, Sang-Jin Shin
BACKGROUND: The biomechanical properties of all-suture anchor for labral repair depending on the insertion angle and location are lacking. The purpose of this study was to quantify the biomechanical fixation characteristics of the anchor position and insertion angle of all-suture anchors for arthroscopic Bankart repair. METHODS: Twenty-four fresh frozen cadaveric glenoid were used. All-suture anchors with 1.5-mm diameter were randomly inserted at 2:30, 4:00, and 5:30 o'clock positions on the glenoid edge, with either 30°, 45° or 60° insertion angles to the mediolateral axis of the glenoid...
October 6, 2018: Clinical Biomechanics
https://www.readbyqxmd.com/read/30260909/scapular-notching-in-reverse-total-shoulder-arthroplasty
#13
Richard Joel Friedman, David Anthony Barcel, Josef Karl Eichinger
Scapular notching is a common radiographic finding occurring after reverse total shoulder arthroplasty, and it refers to an erosive lesion of the inferior scapular neck because of the impingement of the humeral implant during adduction. The clinical importance of notching is unclear, and the optimal treatment of severe notching is unknown. The incidence and severity of scapular notching is related to prosthetic design and surgical technique. Implant design factors include size, shape, and position of the glenosphere, inclination of the humeral neck-shaft angle, implant offset, and native scapular anatomy...
September 26, 2018: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/30195956/higher-critical-shoulder-angle-and-acromion-index-are-associated-with-increased-retear-risk-after-isolated-supraspinatus-tendon-repair-at-short-term-follow-up
#14
Bastian Scheiderer, Florian B Imhoff, Jeremiah D Johnson, James Aglio, Mark P Cote, Knut Beitzel, Andreas B Imhoff, Robert A Arciero, Augustus D Mazzocca, Daichi Morikawa
PURPOSE: To evaluate the effect of critical shoulder angle (CSA), acromion index (AI), and glenoid inclination (GI) on the postoperative healing rate after arthroscopic supraspinatus tendon repair. METHODS: Patients after arthroscopic repair of a symptomatic, unilateral, single-tendon, full-thickness supraspinatus tear in whom nonoperative management had failed were retrospectively reviewed. Magnetic resonance imaging (MRI) studies were obtained 6 months postoperatively and were evaluated by 2 independent observers...
October 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/30177342/small-anteroposterior-inclination-of-the-acromion-is-a-predictor-for-posterior-glenohumeral-erosion-b2-or-c
#15
Dominik C Meyer, Sandro Riedo, Franziska Eckers, Guilherme Carpeggiani, Thorsten Jentzsch, Christian Gerber
BACKGROUND: Anatomic factors associated with static posterior translation of the humeral head with or without glenohumeral osteoarthritis are unknown. We tested the hypothesis that there is an association between glenoid wear, glenoid version, and/or anteroposterior acromial tilt. METHODS: Ninety-nine patients with glenohumeral joint degeneration involving advanced glenoid cartilage wear and/or rotator cuff disease scheduled for anatomic or reverse total shoulder replacement underwent standardized conventional radiographic and computed tomographic shoulder imaging...
August 31, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/30091179/feasibility-and-safety-of-arthroscopic-medial-glenohumeral-ligament-and-subscapularis-tendon-repair-with-knotless-anchors-a-cadaveric-study-in-dogs
#16
Alexandra Penelas, Andreas Gutbrod, Karolin Kühn, Antonio Pozzi
OBJECTIVE: To test the feasibility and safety of an arthroscopic imbrication of the medial glenohumeral ligament (MGHL) and the subscapularis tendon with knotless anchors in dogs. STUDY DESIGN: Cadaveric study. SAMPLE POPULATION: Ten limbs. METHODS: Cranial and caudal arms of the MGHL were imbricated with a 2.9- or a 2.4-mm knotless anchor. A horizontal mattress suture secured with a 3.5-mm knotless anchor was used to imbricate the subscapularis tendon...
August 2018: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/30075926/three-dimensional-treatment-outcomes-in-class-ii-patients-with-different-vertical-facial-patterns-treated-with-the-herbst-appliance
#17
Arjun Atresh, Lucia H S Cevidanes, Marilia Yatabe, Luciana Muniz, Tung Nguyen, Brent Larson, David J Manton, Paul M Schneider
INTRODUCTION: The aims of this study were to evaluate, using 3-dimensional superimposition techniques, the skeletal changes in Class II subjects with different vertical facial patterns treated with the Herbst appliance and to compare these skeletal changes to those of Class II controls treated with elastics. METHODS: Sixteen Herbst patients who met the inclusion criteria were divided into 2 equal groups based on vertical facial pattern as determined by the Frankfort mandibular plane angle (brachyfacial, ≤22°; mesofacial, 23°-29°) and had cone-beam computed tomographs taken before treatment, 8 weeks after Herbst appliance removal, and after subsequent fixed appliance treatment...
August 2018: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/30059761/reverse-shoulder-arthroplasty-for-proximal-humerus-fractures-is-the-glenoid-implant-problematic
#18
Arthur Lignel, Julien Berhouet, Marc-Alexandre Loirat, Philippe Collin, Hervé Thomazeau, David Gallinet, Pascal Boileau, Luc Favard
INTRODUCTION: Reverse shoulder arthroplasty (RSA) is a key tool in the orthopedic trauma surgeon's arsenal, especially when faced with a proximal humerus fracture in older patients. However, few studies have focused on the glenoid side of RSA in this indication as the implant is placed in a generally healthy scapula. HYPOTHESIS: Glenoid implants for RSA after trauma are well positioned and do not often cause complications. MATERIAL AND METHODS: Retrospective multicenter study of 513 patients who underwent RSA because of a proximal humerus fracture...
October 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29978295/modified-friedman-technique-a-new-proposed-method-of-measuring-glenoid-version-in-the-setting-of-glenohumeral-dysplasia
#19
Matthew G Ditzler, J Herman Kan, Maddy Artunduaga, Siddharth P Jadhav, Bryce R Bell, Wei Zhang, Robert C Orth
BACKGROUND: Glenoid version angles are measured to objectively follow changes related to glenohumeral dysplasia in the setting of brachial plexus birth palsy. Measuring glenoid version on cross-sectional imaging was initially described by Friedman et al. in 1992. Recent literature for non-dysplastic shoulders advocates time-consuming reconstructions and reformations for an accurate assessment of glenoid version. OBJECTIVE: To compare Friedman's original method for measuring glenoid version to a novel technique we developed ("modified Friedman") with the reference standard of true axial reformations...
November 2018: Pediatric Radiology
https://www.readbyqxmd.com/read/29954661/rotator-cuff-contact-pressures-at-the-tendon-implant-interface-after-anatomic-total-shoulder-arthroplasty-using-a-metal-backed-glenoid-component
#20
Richard Thomas, Martin Richardson, Minoo Patel, Richard Page, Morgan Sangeux, David C Ackland
BACKGROUND: Rotator cuff tears following anatomic total shoulder arthroplasty increase with duration of follow-up. This study aimed to evaluate contact pressure between the rotator cuff tendons and prosthesis after anatomic total shoulder arthroplasty and compare these with the tendon-contact pressures in the native shoulder. METHODS: Eight entire upper extremities were mounted onto a testing apparatus, and simulated muscle loading was applied to each rotator cuff tendon with the shoulder positioned in abduction, internal rotation, and external rotation...
June 25, 2018: Journal of Shoulder and Elbow Surgery
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