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https://www.readbyqxmd.com/read/29978295/modified-friedman-technique-a-new-proposed-method-of-measuring-glenoid-version-in-the-setting-of-glenohumeral-dysplasia
#1
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...
July 5, 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
#2
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
https://www.readbyqxmd.com/read/29781910/superior-baseplate-inclination-is-associated-with-instability-after-reverse-total-shoulder-arthroplasty
#3
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...
May 17, 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29778592/comparative-analysis-of-2-glenoid-version-measurement-methods-in-variable-axial-slices-on-3-dimensionally-reconstructed-computed-tomography-scans
#4
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
https://www.readbyqxmd.com/read/29774949/the-critical-shoulder-angle-acromial-coverage-is-more-relevant-than-glenoid-inclination
#5
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
https://www.readbyqxmd.com/read/29730136/a-simple-method-to-directly-evaluate-the-lateral-extension-of-the-acromion-an-anatomic-study-of-128-cadaveric-scapulae
#6
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...
May 2, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29723034/large-critical-shoulder-angle-has-higher-risk-of-tendon-retear-after-arthroscopic-rotator-cuff-repair
#7
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...
May 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29717991/survival-to-amputation-in-pre-antibiotic-era-a-case-study-from-a-longobard-necropolis-6th-8th-centuries-ad
#8
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
https://www.readbyqxmd.com/read/29625251/the-influence-of-temporomandibular-joint-movement-parameters-on-dental-morphology
#9
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...
April 3, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29602633/the-lateralization-and-distalization-shoulder-angles-are-important-determinants-of-clinical-outcomes-in-reverse-shoulder-arthroplasty
#10
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
https://www.readbyqxmd.com/read/29541270/early-results-of-the-a-l-p-s-proximal-humerus-locking-plate
#11
Miltiadis Argyropoulos, Matthew Kent
Background: Open reduction internal fixation of displaced 3 and 4-part proximal humerus fractures is an effective treatment modality particularly for the younger age group, but it is not without complications. Fixed angled locking screw plates are the mainstay of fixation. The A.L.P.S. Proximal Humerus Plating System is a new implant that has smooth locking pegs in the place of humeral head screws to help reduce glenoid damage in the event of cut-out and is designed to sit low on the humerus in order to reduce the risk of subacromial impingement...
2018: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/29531936/novel-condylar-repositioning-method-for-3d-printed-models
#12
Keisuke Sugahara, Yoshiharu Katsumi, Masahide Koyachi, Yu Koyama, Satoru Matsunaga, Kento Odaka, Shinichi Abe, Masayuki Takano, Akira Katakura
Background: Along with the advances in technology of three-dimensional (3D) printer, it became a possible to make more precise patient-specific 3D model in the various fields including oral and maxillofacial surgery. When creating 3D models of the mandible and maxilla, it is easier to make a single unit with a fused temporomandibular joint, though this results in poor operability of the model. However, while models created with a separate mandible and maxilla have operability, it can be difficult to fully restore the position of the condylar after simulation...
December 2018: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29505820/accuracy-of-patient-specific-guided-implantation-of-the-glenoid-component-in-reversed-shoulder-arthroplasty
#13
O Verborgt, A I Hachem, K Eid, Kd Vuylsteke, M Ferrand, P Hardy
BACKGROUND: The aim of this study was to assess the accuracy of patientspecific guided glenoid component implantation in reverse shoulder arthroplasty MATERIALS AND METHODS: 32 reverse shoulder arthroplasties were done using pre-operative 3D planning and 4 patient-specific guides to prepare the glenoid and position the glenoid component. Baseplate version, inclination and entry point as well as angulation of the screws were compared to the pre-operative plan measured on CT by independent observers...
March 2, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29498981/anatomic-considerations-for-temporomandibular-joint-vascularized-composite-allotransplantation
#14
Nima Khavanin, Edward H Davidson, Diana Y Lee, Patrick Byrne, Amir H Dorafshar
Concomitant temporomandibular joint (TMJ) transplantation is an obvious advancement in the reconstructive armamentarium for face transplantation in scenarios involving TMJ ankylosis. This study investigates the fidelity of mandibular morphology and explores the feasibility of bilateral mandibular condyle transfer in facial vascularized composite allotransplantation. Geometric analysis was performed on 100 skeletally mature maxillofacial computed tomography scans. Exclusion criteria included mandibular trauma and dentoalveolar disease...
June 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29444577/classification-of-scapular-body-fractures
#15
J Bartonicek, D Klika, M Tucek
INTRODUCTION: The aim of this study is to present, on the basis of 3D CT reconstructions of 187 of scapular body fractures, a clinically oriented classification respecting the biomechanical architecture of the scapula. METHODS: In a series of 375 scapula fractures we identified 187 body fractures in187 patients (157 men, 30 women) with the mean age of 48 years (range; 16100 years). 3D CT reconstructions were obtainedof all fractures, to allow an objective evaluation of the fracture pattern...
2018: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/29430140/an-in-vitro-study-to-evaluate-the-accuracy-of-orthopantomograph-as-an-aid-to-determine-condylar-guidance
#16
Sukhjit Kaur, Kusum Datta
Purpose: The study was conducted to evaluate the accuracy of orthopantomograph (OPG) as an aid to determine condylar guidance. Methodology: The condylar guidance was measured using the impressions of glenoid fossae and radiographs (OPG) on thirty dried human skulls. Frankfurt horizontal plane (FHP) was used as a reference plane in both the methods and wire markers were adapted to make the contours of glenoid fossae discernible for both the methods. The condylar inclination angle was measured between FHP and a line joining the most concave point on the glenoid fossa with the most inferior point on the articular eminence on both right and left sides...
January 2018: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/29430137/a-clinico-radiographic-study-to-compare-and-co-relate-sagittal-condylar-guidance-determined-by-intraoral-gothic-arch-tracing-method-and-panoramic-radiograph-in-completely-edentulous-patients
#17
Sanath Shetty, Mythili Kunta, Kamalakanth Shenoy
Purpose: The purpose of this study was to compare and correlate sagittal condylar guidance determined by intraoral gothic arch tracing method and panoramic radiograph in edentulous patients. Materials and Methods: Twelve completely edentulous patients were selected by the inclusion and exclusion criteria. Conventional steps in the fabrication of complete denture till jaw relation were carried out. Intraoral gothic arch tracing and protrusive interocclusal records were obtained for each patient...
January 2018: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/29426741/lower-shoulder-abduction-during-throwing-motion-may-cause-forceful-internal-impingement-and-decreased-anterior-stability
#18
Masaki Akeda, Teruhisa Mihata, Woong Kyo Jeong, Michelle H McGarry, Tetsuya Yamazaki, Thay Q Lee
BACKGROUND: Internal impingement and decreased anterior stability, which result from shoulder capsular loosening, are common shoulder pathologies in throwing athletes. The purpose of this study was to assess the effect of shoulder abduction angle on shoulder internal impingement and anterior shoulder stability during the simulated throwing motion. METHODS: Eight cadaveric shoulders were tested by simulating the late-cocking and acceleration phases of the throwing motion for intact and thrower's shoulder conditions...
June 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29399445/arthroscopic-lateral-border-resection-in-medialized-scapula-neck-fractures
#19
Valentin Rausch, Matthias Königshausen, Thomas A Schildhauer, Dominik Seybold, Jan Gessmann
Scapula neck fractures are rare injuries, leaving several treatment options. Standardized markers for operative treatment are a decreased glenopolar angle ≤22°, lateral border offset (LBO) of the glenoid ≥20 mm, angular deformity ≥45°, or LBO ≥15 mm plus angular deformity ≥35°. If operative treatment is not performed before union, the fracture heals malaligned with possible mechanical complications due to a medialized glenoid and the protruding lateral border. Common operative treatment comprises a corrective osteotomy for the anatomic correction of the malunited fracture, leaving intra-articular pathologies like adhesive capsular stiffness unaddressed...
October 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29354408/arthroscopic-repair-of-a-circumferential-360%C3%A2-labral-tear
#20
Allison J Rao, Gregory L Cvetanovich, William A Zuke, Quentin Low, Brian Forsythe
Injuries to the glenoid labrum can result in shoulder instability and pain. These lesions may occur anywhere around the glenoid labrum, and thus, the arthroscopist must be prepared to approach all aspects of the glenoid from multiple angles. The pan-labral or circumferential (360°) tear of the glenoid labrum presents a unique challenge to even the experienced arthroscopist. The extent of the lesion requires the use of accessory portals and percutaneous techniques to establish adequate visualization and to facilitate the proper trajectory for anchor placement...
August 2017: Arthroscopy Techniques
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