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Angle to the glenoid

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
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
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
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
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
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
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
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
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
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
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
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
Robert Z Tashjian, Brook I Martin, Cassandra A Ricketts, Heath B Henninger, Erin K Granger, Peter N Chalmers
BACKGROUND: Instability is the most common complication after reverse total shoulder arthroplasty (rTSA). In the native glenohumeral joint, in addition to full dislocations, more subtle forms of instability exist. However, the incidence of more subtle forms of instability, the factors associated with instability, and the effect of instability on validated outcome scores after rTSA remain poorly understood. QUESTIONS/PURPOSES: (1) After rTSA, what is the risk of instability, including more subtle forms of subjective instability? (2) What are the factors associated with instability? (3) Are more subtle forms of instability associated with lower American Shoulder and Elbow Surgeons (ASES) functional outcome scores than those patients without instability? METHODS: A total of 168 rTSAs were performed during the study period...
August 2018: Clinical Orthopaedics and related Research
Gregory Cunningham, John Freebody, Margaret M Smith, Mohy E Taha, Allan A Young, Benjamin Cass, Bruno Giuffre
BACKGROUND: Most glenoid version measurement methods have been validated on 3-dimensionally corrected axial computed tomography (CT) slices at the mid glenoid. Variability of the vault according to slice height and angulation has not yet been studied and is crucial for proper surgical implant positioning. The aim of this study was to analyze the variation of the glenoid vault compared with the Friedman angle according to different CT slice heights and angulations. The hypothesis was that the Friedman angle would show less variability...
May 16, 2018: Journal of Shoulder and Elbow Surgery
Silvan Beeler, Anita Hasler, Tobias Götschi, Dominik C Meyer, Christian Gerber
It is still unknown whether glenoid inclination or lateral acromial roof extension is a more important determinant for development of rotator cuff tears (RCT) or osteoarthritis (OA) of the shoulder. It was the purpose of this study, to evaluate whether there is a potential predominance of one of these factors in pathogenesis of RCT or concentric OA. We analyzed 70 shoulders with advanced degenerative RCT and 54 shoulders with concentric OA undergoing primary shoulder arthroplasty (anatomical or reverse) using antero-posterior radiography and multiplanar computed tomography...
May 18, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Trifon Totlis, Anirudh K Gowd, Eamon D Bernardoni, Brian J Cole, Nikhil N Verma, Konstantinos Natsis
BACKGROUND: The lateral extension of the acromion from the glenohumeral joint is the critical variable that both the acromial index and critical shoulder angle reflect. The purpose of this study was to establish a simple and reproducible method to directly measure the lateral extension of the acromion that will be independent of patient demographic characteristics, scapular rotation, or other morphologic features of the shoulder. METHODS: This study used 128 unpaired cadaveric scapulae with a mean age of 69...
September 2018: Journal of Shoulder and Elbow Surgery
Hong Li, Yuzhou Chen, Jiwu Chen, Yinghui Hua, Shiyi Chen
BACKGROUND: The critical shoulder angle (CSA) is the angle created between the superior and inferior bone margins of the glenoid and the most lateral border of the acromion. A few studies recently investigated the relation between CSA and functional outcomes after rotator cuff repair. However, there is a lack of research investigating the effect of CSA on postoperative tendon integrity after rotator cuff repair. PURPOSE: To assess the effects of the CSA on postoperative tendon integrity after rotator cuff repair...
July 2018: American Journal of Sports Medicine
Ileana Micarelli, Robert Paine, Caterina Giostra, Mary Anne Tafuri, Antonio Profico, Marco Boggioni, Fabio Di Vincenzo, Danilo Massani, Andrea Papini, Giorgio Manzi
The Longobard necropolis of Povegliano Veronese dates from the 6th to the 8th centuries AD. Among the 164 tombs excavated, the skeleton of an older male shows a well-healed amputated right forearm. The orientation of the forearm fracture suggests an angled cut by a single blow. Reasons why a forearm might be amputated include combat, medical intervention, and judicial punishment. As with other amputation cases reported in literature, this one exhibits both healing and osteoblastic response. We argue that the forelimb stump morphology suggests the use of a prosthesis...
April 10, 2018: Journal of Anthropological Sciences, Rivista di Antropologia: JASS
Luminita Oancea, Roxana Stegaroiu, Corina Marilena Cristache
Association between tooth morphology, occlusal relations and mandibular condyle/glenoid fossa morphology is still a controversial issue in dentistry. The aim of the present study was to examine the influence of three important articular parameters on the dental morphology and the crown volume, quantifying the variation for each tooth group: incisor, canine, premolar and molar. MATERIALS AND METHODS: All maxillary teeth from a set of basic study models were prepared for zirconia single crowns...
July 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
Achilleas Boutsiadis, Hubert Lenoir, Patrick J Denard, Jean-Claude Panisset, Paul Brossard, Philippe Delsol, Frédéric Guichard, Johannes Barth
BACKGROUND: Reverse shoulder arthroplasty (RSA) designs vary in the lateralization and distalization geometry, which may affect functional outcomes. The purpose was to determine the effect of RSA lateralization and distalization on final functional outcomes by using the "lateralization shoulder angle" (LSA) and the "distalization shoulder angle" (DSA). METHODS: Forty-six consecutive patients who underwent RSA for cuff tear arthropathy were retrospectively evaluated...
July 2018: Journal of Shoulder and Elbow Surgery
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