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Angle to the glenoid

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https://www.readbyqxmd.com/read/28948516/version-correction-via-eccentric-reaming-compromises-remaining-bone-quality-in-b2-glenoids-a-computational-study
#1
Xiang Chen, Akhil S Reddy, Andreas Kontaxis, Daniel S Choi, Timothy Wright, David M Dines, Russell F Warren, Julien Berhouet, Lawrence V Gulotta
BACKGROUND: Version correction via eccentric reaming reduces clinically important retroversion in Walch type B2 glenoids (those with substantial glenoid retroversion and a second, sclerotic neoglenoid cavity) before total shoulder arthroplasty (TSA). Clinically, an increased risk of glenoid component loosening in B2 glenoids was hypothesized to be the result of compromised glenoid bone quality attributable to eccentric reaming. However, no established guidelines exist regarding how much version correction can be applied without compromising the quality of glenoid bone...
September 25, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28945134/three-dimensional-assessment-of-curvature-torsion-and-canal-flare-index-of-the-humerus-of-skeletally-mature-nonchondrodystrophic-dogs
#2
Emily J Smith, Denis J Marcellin-Little, Ola L A Harrysson, Emily H Griffith
OBJECTIVE To assess 3-D geometry of the humerus of dogs and determine whether the craniocaudal canal flare index (CFI) is associated with specific geometric features. SAMPLE CT images (n = 40) and radiographs (38) for 2 groups of skeletally mature nonchondrodystrophic dogs. PROCEDURES General dimensions (length, CFI, cortical thickness, and humeral head offset), curvature (shaft, humeral head, and glenoid cavity), version (humeral head and greater tubercle), and torsion were evaluated on CT images. Dogs were allocated into 3 groups on the basis of the craniocaudal CFI, and results were compared among these 3 groups...
October 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28938332/mandibular-condyle-reconstruction-with-fibula-free-tissue-transfer-the-role-of-the-masseter-muscle
#3
Andreas Gravvanis, Dimitrios Anterriotis, Despoina Kakagia
BACKGROUND: Free fibula flap is an option for primary restoration after disarticulation mandibular resection, though literature on technique refinements is scarce. The authors hypothesized that inset of the masseter, the key mandibular elevator muscle, at the reconstructed mandible may optimize functional recovery. METHODS: All patients undergoing reconstruction of mandibulectomy-condylectomy defect (January 2009 to January 2014) by means of a fibular flap were prospectively studied...
September 21, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28894931/radiographic-evaluation-of-condylar-positioning-in-patients-undergoing-orthognathic-surgery
#4
Wanderley da Silva Félix Junior, Leandro Eduardo Klüppel, Delson João da Costa, Ângela Fernandes, Rafaela Scariot, Nelson Luis Barbosa Rebellato
OBJECTIVE: The aim of this study was to evaluate alterations in condylar positioning through submentovertex projection (Hirtz Radiographic Technique) in patients who underwent orthognathic surgery for maxillary advancement and mandibular setback with stable internal fixation. METHODS: A prospective longitudinal clinical study of 40 surgical patients presenting dentofacial deformity admitted in the Oral and Maxillofacial Surgery Department of Federal University of Paraná (UFPR) in the period between March 2013 and December 2015...
September 12, 2017: Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28861389/cone-beam-computed-tomographic-evaluation-of-the-temporomandibular-joint-and-dental-characteristics-of-patients-with-class-ii-subdivision-malocclusion-and-asymmetry
#5
Mingna Huang, Yun Hu, Jinfeng Yu, Jicheng Sun, Ye Ming, Leilei Zheng
OBJECTIVE: Treating Class II subdivision malocclusion with asymmetry has been a challenge for orthodontists because of the complicated characteristics of asymmetry. This study aimed to explore the characteristics of dental and skeletal asymmetry in Class II subdivision malocclusion, and to assess the relationship between the condyle-glenoid fossa and first molar. METHODS: Cone-beam computed tomographic images of 32 patients with Class II subdivision malocclusion were three-dimensionally reconstructed using the Mimics software...
September 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28861201/arthroscopic-evaluation-of-subluxation-of-the-long-head-of-the-biceps-tendon-and-its-relationship-with-subscapularis-tears
#6
Kyoung-Hwan Koh, Su Cheol Kim, Jae Chul Yoo
BACKGROUND: The purpose of this study was to evaluate the angle between the long head of the biceps tendon (LHBT) and the glenoid during arthroscopic surgery and its correlation with biceps subluxation on magnetic resonance imaging (MRI). Furthermore, we evaluated the relationship of this angle with subscapularis tears and biceps pathologies. METHODS: MRI and arthroscopic images of 270 consecutive patients who had undergone arthroscopic surgery were retrospectively evaluated...
September 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/28794582/what-are-the-anatomical-predictive-factors-of-degenerative-superior-labrum-anterior-to-posterior-lesion-in-rotator-cuff-tear
#7
Joong-Bae Seo, Jae-Sung Yoo, Joon-Yeul Lee, Kyoo-Hong Han
The purpose of this study was to evaluate the influence of anatomical factors degenerative superior labrum anterior to posterior lesion in rotator cuff tear. The study included 421 middle-aged patients treated using arthroscopic surgery for rotator cuff tears. Patients were divided into two groups based on the superior labrum anterior-to-posterior (SLAP). Glenoid inclination, glenoid length, humeral head diameter, acromio-humeral distance (AHD) head-glenoid difference (HGD), head glenoid angle (HGA), size and retraction of rotator cuff tears were evaluated in both groups...
December 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28763415/clinical-and-radiographic-outcomes-of-the-ream-and-run-procedure-for-primary-glenohumeral-arthritis
#8
Jeremy S Somerson, Moni B Neradilek, Benjamin C Service, Jason E Hsu, Stacy M Russ, Frederick A Matsen
BACKGROUND: The ream-and-run procedure can provide improvement in shoulder function and comfort for selected patients with primary glenohumeral arthritis who wish to avoid a prosthetic glenoid component. The purpose of this study was to evaluate factors associated with medialization of the humeral head after this procedure as well as the relationship of medialization to the clinical outcome. METHODS: We collected patient, shoulder, and procedure characteristics along with Simple Shoulder Test (SST) scores before surgery and at the time of follow-up...
August 2, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28735842/angled-bio-rsa-bony-increased-offset-reverse-shoulder-arthroplasty-a-solution-for-the-management-glenoid-bone-loss-and-erosion
#9
Pascal Boileau, Nicolas Morin-Salvo, Marc-Olivier Gauci, Brian L Seeto, Peter N Chalmers, Nicolas Holzer, Gilles Walch
BACKGROUND: Glenoid deficiency and erosion (excessive retroversion/inclination) must be corrected in reverse shoulder arthroplasty (RSA) to avoid prosthetic notching or instability and to maximize function, range of motion, and prosthesis longevity. This study reports the results of RSA with an angled, autologous glenoid graft harvested from the humerus (angled BIO-RSA). METHODS: A trapezoidal bone graft, harvested from the humerus and fixed with a long-post baseplate and screws, was used to compensate for residual glenoid bone loss/erosion...
July 20, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28689820/reverse-total-shoulder-glenoid-baseplate-stability-with-superior-glenoid-bone-loss
#10
Elise J Martin, Thomas R Duquin, Mark T Ehrensberger
BACKGROUND: Superior wear of the glenoid bone is common in patients with rotator cuff arthropathy. This can become a treatment challenge for patients who require shoulder arthroplasty. In reverse shoulder arthroplasty (RSA), glenoid bone loss may affect the stability of baseplate fixation. The primary purpose of this biomechanical laboratory study was to assess the initial fixation stability of RSA glenosphere baseplates in the presence of variable amounts of superior glenoid bone loss...
July 6, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28658583/risk-of-engagement-of-bipolar-bone-defects-in-posterior-shoulder-instability
#11
Philipp Moroder, Fabian Plachel, Mark Tauber, Peter Habermeyer, Andreas Imhoff, Dennis Liem, Helmut Lill, Herbert Resch, Christian Gerhardt, Markus Scheibel
BACKGROUND: The risk of re-engagement of bipolar bone defects in posterior shoulder instability has not yet been investigated. HYPOTHESIS: Posterior glenoid defects can lead to the engagement of supposedly noncritical reverse Hill-Sachs lesions (RHSLs). STUDY DESIGN: Descriptive laboratory study. METHODS: In a retrospective multicenter study, 102 cases of posterior shoulder dislocations and resulting RHSLs were collected...
October 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28630752/acromion-and-glenoid-shape-why-are-they-important-predictive-factors-for-the-future-of-our-shoulders
#12
Richard W Nyffeler, Dominik C Meyer
The shape of the acromion differs between patients with degenerative rotator cuff tears and individuals without rotator cuff pathology.It can be assessed in the sagittal plane (acromion type, acromion slope) and in the coronal plane (lateral acromion angle, acromion index, critical shoulder angle).The inter-observer reliability is better for the measurements in the coronal plane.A large lateral extension (high acromion index or high critical shoulder angle) and a lateral down-sloping of the acromion (low lateral acromion angle) are associated with full-thickness supraspinatus tears...
May 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28602259/assessment-of-condyle-position-fossa-morphology-and-disk-displacement-in-symptomatic-patients
#13
Katharina Alves Rabelo, Saulo Leonardo Sousa Melo, Marianna Guanaes Gomes Torres, Larissa Rangel Peixoto, Paulo Sérgio Flores Campos, Iêda Margarida Crusoé Rocha Rebello, Daniela Pita de Melo
OBJECTIVE: The aim of the study was to determine whether there are any associations between the morphology of the glenoid fossa, articular spaces, and disk displacement by evaluating the magnetic resonance imaging (MRI) scans of symptomatic patients. Gender and age were also evaluated for any effect on the parameters. STUDY DESIGN: MRI scans of 199 temporomandibular joints were assessed for the morphology of the glenoid fossa and articular spaces in both sagittal and coronal views...
April 19, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28600884/physiological-effects-of-anterior-repositioning-splint-on-temporomandibular-joint-disc-displacement-a-quantitative-analysis
#14
H-M Chen, M-Q Liu, A U-J Yap, K-Y Fu
Anterior repositioning splints (ARS) are used primarily for the management of temporomandibular joint (TMJ) anterior disc displacement with reduction (ADDwR). However, the exact physiological effects of ARS are still unclear. This study investigated the short and long-term effects of ARS on disc and condyle angles/positions by metric analysis. Twenty-two subjects diagnosed with ADDwR were recruited. Maxillary full-coverage ARS were fabricated, and MRI of TMJs was obtained before splint treatment, immediate post-insertion and 6 months after splint treatment...
September 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28576698/impact-of-shoulder-rotation-on-neck-shaft-angle-a-clinical-study
#15
J H Assunção, E A Malavolta, R A Beraldo, M E C Gracitelli, M Bordalo-Rodrigues, A A Ferreira Neto
BACKGROUND: Two recent experimental studies evaluated the influence of shoulder rotation on neck-shaft angle, with conflicting results. However, there have been no clinical studies of whether this angle varies in different shoulder positions. The present study aimed to determine whether shoulder rotation affects neck-shaft angle on standard radiographs in patients with complaints of shoulder pain. HYPOTHESIS: Shoulder rotation does not affect neck-shaft angle. MATERIALS AND METHODS: A prospective study was conducted in selected patients with shoulder pain...
May 30, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28545718/the-effect-of-glenoid-component-version-and-humeral-polyethylene-liner-rotation-on-subluxation-and-impingement-in-reverse-shoulder-arthroplasty
#16
Vijay N Permeswaran, Andrea Caceres, Jessica E Goetz, Donald D Anderson, Carolyn M Hettrich
BACKGROUND: A previously validated finite element modeling approach was used to determine how changes in glenoid component version and polyethylene liner rotation within the humeral component affect the arm abduction angle at which impingement between the inferior glenoid and the polyethylene liner occurs as well as the amount of subluxation generated by that impingement. MATERIALS AND METHODS: Five glenoid component versions (5° anteversion; neutral; 5°, 10°, and 20° retroversion) and 7 polyethylene liner rotations (20° and 10° anterior; neutral; 10°, 20°, 30°, and 40° posterior) were considered, resulting in 35 different clinically representative models...
May 22, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28528016/the-influence-of-humeral-neck-shaft-angle-and-glenoid-lateralization-on-range-of-motion-in-reverse-shoulder-arthroplasty
#17
Birgit S Werner, Jean Chaoui, Gilles Walch
BACKGROUND: Recent developments in reverse shoulder arthroplasty (RSA) have focused on changes in several design-related parameters, including humeral component design, to allow for easier convertibility. Alterations in humeral inclination and offset on shoulder kinematics may have a relevant influence on postoperative outcome. This study used a virtual computer simulation to evaluate the influence of humeral neck shaft angle and glenoid lateralization on range of motion in onlay design RSA...
May 17, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28514491/3d-image-based-morphometric-analysis-of-the-scapular-neck-length-in-subjects-undergoing-reverse-shoulder-arthroplasty
#18
P Simon, M Diaz, M Cusick, B Santoni, M Frankle
INTRODUCTION: Scapular notching after RSA may, in part, be related to a patient's scapular morphology. The purpose of this study was to develop a novel 3D measurement technique to describe infraglenoid tubercle morphometry. We hypothesize that the parameters describing infraglenoid tubercle would be normally distributed and would correlate with individual's demographics and glenoid morphometry. MATERIALS AND METHODS: A group of 110 subjects treated with RSA were evaluated...
May 17, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28506491/mapping-of-glenoid-bone-loss-in-recurrent-anterior-shoulder-instability-is-there-a-particular-deficit-pattern
#19
Benjamin Bockmann, Arne Johannes Venjakob, Frank Reichwein, Marthe Hagenacker, Wolfgang Nebelung
BACKGROUND: Glenoid bone loss in recurrent anterior shoulder instability is a challenging problem for shoulder surgeons, and knowledge about the anatomy of glenoid deficits is scarce. In this study, we tried to evaluate the pattern of this pathology. METHODS: Our analysis included 44 shoulders from 44 patients with recurrent anterior shoulder instability accompanied by a clinically relevant glenoid bone loss. The defect size, the localization of the inferior defect edge, and the defect angle were measured, and osseous landmarks were identified...
May 11, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28488015/no-relationship-between-critical-shoulder-angle-and-glenoid-erosion-after-shoulder-hemiarthroplasty-a-comparative-radiographic-study
#20
S Cerciello, B J Morris, E Visonà, K Corona, T B Edwards, N Maffulli, G Walch
INTRODUCTION: Symptomatic glenoid erosion is one of the most common causes of functional impairment after shoulder hemiarthroplasty. A decrease in the critical shoulder angle (CSA) has been associated with the development of shoulder arthritis. The inter-observer reliability of the CSA and the relationship between CSA and symptomatic glenoid erosion after shoulder hemiarthroplasty were investigated. MATERIALS AND METHODS: Twenty-eight patients with symptomatic glenoid erosion after anatomic hemiarthroplasty were compared to a control group of 30 patients with no signs of symptomatic glenoid erosion...
May 9, 2017: Archives of Orthopaedic and Trauma Surgery
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