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Angle to the glenoid

Alexandre Hardy, Philippe Loriaut, Benjamin Granger, Ahmed Neffati, Audrey Massein, Laurent Casabianca, Hugues Pascal-Moussellard, Antoine Gerometta
PURPOSE: The arthroscopic Latarjet procedure has provided reliable results in the treatment of anterior shoulder instability. However, this procedure remains technically challenging and is related to several complications. The morphology of the coracoid and the glenoid are inconsistent. Inadequate coracoid and glenoid preparing may lead to mismatching between their surfaces. Inadequate screws lengthening and orientation are a major concern. Too long screws can lead to suprascapular nerve injuries or hardware irritation, whereas too short screws can lead to nonunions, fibrous unions or migration of the bone block...
October 12, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Bauke W Kooistra, W Jaap Willems, Eelke Lemmens, Bas P Hartel, Michel P J van den Bekerom, Derek F P van Deurzen
BACKGROUND: Compared with total shoulder arthroplasty (TSA), total shoulder surface replacement (TSSR) may offer the advantage of preservation of bone stock and shorter surgical time, possibly at the expense of glenoid component positioning and increasing lateral glenohumeral offset. We hypothesized that in patients treated for osteoarthritis with a sufficient rotator cuff, TSA and TSSR patients have comparable functional outcome, glenoid component version, and lateral glenohumeral offset...
October 7, 2016: Journal of Shoulder and Elbow Surgery
Julien Clément, Jérémie Ménard, Maxime Raison, Jennifer Dumais, Laura Dubois, Dominique M Rouleau
BACKGROUND: Although recurrent anterior shoulder instability (RASI) is a common condition in young patients, no studies to date have measured the 3-dimensional (3D) locked position of the glenohumeral joint during an anterior dislocation. Therefore, our goal was to estimate it with 3D computed tomography (CT) scans. METHODS: Patients in this prospective observational study were separated in 3 groups: normal laxity, hyperlaxity, and epilepsy. They were characterized by questionnaires (Western Ontario Shoulder Instability Index, 11-item version of the Disabilities of the Arm, Shoulder and Hand, and Beighton Laxity Score), and a CT scan revealing bipolar bone defects...
October 7, 2016: Journal of Shoulder and Elbow Surgery
Nael Hawi, Petra Magosch, Mark Tauber, Sven Lichtenberg, Frank Martetschläger, Peter Habermeyer
BACKGROUND: A variety of measurements can be used to assess radiographic osteoarthritic changes of the shoulder. This study aimed to analyze the correlation between the radiographic humeral-sided Samilson and Prieto classification system and 3 different radiographic classifications describing the changes of the glenoid in the coronal plane. METHODS: The study material included standardized radiographs of 50 patients with idiopathic osteoarthritis before anatomic shoulder replacement...
October 6, 2016: Journal of Shoulder and Elbow Surgery
P Clavert, G Koch, L Neyton, P Metais, J Barth, G Walch, L Lafosse
BACKGROUND: Standard radiography with an antero-posterior view and Bernageau's glenoid profile view is the method most widely reported in the literature to assess coracoid bone block position and fusion. OBJECTIVE: The aim of this cadaver study was to determine whether the antero-posterior and Bernageau's radiographs provide a reliable and reproducible evaluation of the position of a coracoid bone block and its fixation screws. METHOD: An isolated scapula showing no evidence of osteoarthritis or other abnormalities was used...
October 4, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
Ritwik Kejriwal, Tarun Ahuja, Thin Hong
BACKGROUND: Plain radiographs still play a role in management of extraarticular scapular neck fractures. Glenopolar angle (GPA) is one of the radiograph measurements that is used to determine the necessity for surgery. Our aim was to establish reliability of GPA on plain radiograph in patients with extraarticular scapular neck fractures. METHODS: We performed a multicentre retrospective study including all patients with extraarticular scapular neck fractures with available imaging between 2006 and 2012...
October 4, 2016: Injury
Lisa K Schroder, Erich M Gauger, Jeffrey A Gilbertson, Peter A Cole
BACKGROUND: This study's purpose was to assess patient-based functional outcomes following open reduction and internal fixation (ORIF) of displaced scapular body and glenoid neck fractures. This series represents a 9-year experience at a level-I trauma center and referral destination for this injury. METHODS: A database was established to record surgical and functional outcomes of scapular fractures treated with ORIF. For this report, the cases of all patients who had a glenoid neck or scapular body fracture (AO/OTA 14-A3 or 14-C1) without intra-articular involvement were reviewed...
October 5, 2016: Journal of Bone and Joint Surgery. American Volume
Constantina Moraiti, Shahnaz Klouche, Jean David Werthel, Thomas Bauer, Philippe Hardy
PURPOSE: To propose and to assess the reproducibility of a new method (GO [glenoid orientation] index) for the estimation of the glenoid orientation in relation to the anterior surface of the glenoid. METHODS: This is a retrospective study on computed tomography (CT) scan. The GO index was defined as the angle formed by a line perpendicular to the tangent to the anterior surface of the scapula and the glenoid line (which is defined as the line connecting the anterior and the posterior rim of the glenoid)...
October 4, 2016: International Orthopaedics
O Le Reun, J Lebhar, F Mateos, J L Voisin, H Thomazeau, M Ropars
INTRODUCTION: Many clinical anatomy studies have looked into how variations in the acromion, coracoacromial ligament (CAL) and subacromial space are associated with rotator cuff injuries. However, no study up to now had defined anatomically the fibro-osseous canal that confines the supraspinatus muscle in the subcoracoacromial space. Through an anatomical study of the scapula, we defined the bone-related parameters of this canal and its anatomical variations. MATERIALS AND METHODS: This study on dry bones involved 71 scapulas...
September 26, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
Amandeep Kaur, Amanpreet S Natt, Simranjeet K Mehra, Karan Maheshwari, Gagandeep Singh, Amanjot Kaur
INTRODUCTION: The position of the condyle in the glenoid fossa plays an important role in the stability of occlusion after orthodontic treatment. Cone beam computed tomography (CBCT) provides an optimal imaging of the osseous components of the temporomandibular joint (TMJ) and give a full size truly three-dimensional (3D) description in real anatomical size. The present study aimed to visualize and compare the position of condyle in the glenoid fossa for different occlusions by using CBCT Materials and methods: Cone beam computed tomographic images of 45 subjects, aged 18 to 42 years, were evaluated...
2016: Journal of Contemporary Dental Practice
Rajendra Sawh-Martinez, Yassmin Parsaei, Robin Wu, Alexander Lin, Philipp Metzler, Christopher DeSesa, Derek M Steinbacher
PURPOSE: Virtual surgical planning (VSP) using computer-aided design and manufacturing (CAD-CAM) has been reported to aid in craniofacial reconstruction. The reported improvements have been related mainly to operative performance, with limited evaluations of the position and function of the temporomandibular joint (TMJ). This study analyzed the radiographic detail of postoperative outcomes related to the TMJ. MATERIALS AND METHODS: Patients who underwent mandibular reconstruction with and without VSP were analyzed...
August 25, 2016: Journal of Oral and Maxillofacial Surgery
Grant H Garcia, Joseph N Liu, Ryan M Degen, Christine C Johnson, Alexander Wong, David M Dines, Lawrence V Gulotta, Joshua S Dines
BACKGROUND: No evaluation has been done on the relationship of the critical shoulder angle (CSA) with retear after rotator cuff repair. Our purpose was to evaluate whether a higher CSA is associated with retear after rotator cuff repair. METHODS: This was a retrospective review of 76 patients who had undergone rotator cuff repair with postoperative ultrasound examination. Ultrasound findings were graded no retear (NT), partial-thickness (PT) retear, or full-thickness (FT) retear...
September 1, 2016: Journal of Shoulder and Elbow Surgery
Ryuzo Arai, Hideto Harada, Hiroyuki Tsukiyama, Yoshimitsu Takahashi, Masahiko Kobayashi, Takahiko Saji, Shuichi Matsuda
BACKGROUND: For shoulder arthroscopy, few anatomical landmarks are available and inexperienced surgeons tend to be adrift due to the limited visual field of the scope. The purpose of this study was to demonstrate the useful landmarks around the glenoid for accurate orientation, and also the safe distance to avoid suprascapular nerve injury during surgical procedures around the glenoid. METHODS: In 15 human solution-fixed cadavers, a cross-section of the shoulder joint on the labrum surface was created...
August 30, 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
S Schröter, M Krämer, B Welke, C Hurschler, R Russo, M Herbst, U Stöckle, A Ateschrang, M Maiotti
BACKGROUND: Anterior shoulder dislocation is common. The treatment of recurrence with glenoid bone defect is still considered controversial. A new arthroscopic subscapularis augmentation has recently been described that functions to decrease the anterior translation of the humeral head. The purpose of the presented study was to examine the biomechanical effect on glenohumeral joint motion and stability. METHODS: Eight fresh frozen cadaver shoulders were studied by use of a force guided industrial robot fitted with a six-component force-moment sensor to which the humerus was attached...
October 2016: Clinical Biomechanics
Andres F Cabezas, Kristi Krebes, Michael M Hussey, Brandon G Santoni, Hyuong Sik Kim, Mark A Frankle, Joo Han Oh
BACKGROUND: The aim of this study was to determine if there were significant differences in glenohumeral joint morphology between North American and East Asian populations that may influence sizing and selection of shoulder arthroplasty systems. METHODS: Computed tomography reconstructions of 92 North American and 58 East Asian patients were used to perform 3-dimensional measurements. The proximal humeral position was normalized in all patients by aligning it with the scapular plane utilizing anatomic landmarks...
September 2016: Clinics in Orthopedic Surgery
Ramin Herschel, Karl Wieser, Mark E Morrey, Carlos H Ramos, Christian Gerber, Dominik C Meyer
BACKGROUND: Glenoid erosion is one of the main concerns in shoulder hemiarthroplasty. The goal of this study was to quantify glenoid erosion and to identify risk factors in patients with humeral hemiarthroplasty. METHODS: There were 118 shoulders in 113 patients available for a standardized retrospective review. Erosion was graded as follows: grade 1, none; grade 2, mild (erosion into subchondral bone); grade 3, moderate (medialization of subchondral bone with hemispheric deformation); or grade 4, severe...
August 18, 2016: Journal of Shoulder and Elbow Surgery
Christoph Engelhardt, Alain Farron, Fabio Becce, Nicolas Place, Dominique P Pioletti, Alexandre Terrier
BACKGROUND: Previous clinical studies have reported associations between glenoid inclination (GI), the acromion index (AI), and the critical shoulder angle (CSA) on the one hand and the occurrence of glenohumeral osteoarthritis and supraspinatus tendon tears on the other hand. The objective of this work was to analyze the correlations and relative importance of these different anatomic parameters. METHODS: Using a musculoskeletal shoulder model developed from magnetic resonance imaging scans of 1 healthy volunteer, we varied independently GI from 0° to 15° and AI from 0...
August 10, 2016: Journal of Shoulder and Elbow Surgery
David M Burns, Jaskarndip Chahal, Shahram Shahrokhi, Patrick Henry, David Wasserstein, Cari Whyne, John Theodoropoulos, Darrell Ogilvie-Harris, Tim Dwyer
BACKGROUND: Anatomic studies have demonstrated that bipolar glenoid and humeral bone loss have a cumulative effect on shoulder instability and that these defects may engage in functional positions depending on their size and location, potentially resulting in failure of stabilization procedures. Determining which lesions pose a risk for engagement remains challenging, with arthroscopic assessments and a 3-dimensional computed tomography (CT)-based glenoid track method being accepted approaches at this time...
August 5, 2016: American Journal of Sports Medicine
Josef K Eichinger, Daniel F Massimini, Jungryul Kim, Laurence D Higgins
BACKGROUND: Abnormal glenoid version is a risk factor for shoulder instability. However, the degree to which the variance in version (both anteversion and retroversion) affects one's predisposition for instability is not well understood. PURPOSE: To determine the influence of glenoid version on anterior shoulder joint stability and to determine if the direction of the humeral head dislocation is a stimulus for the development of Hill-Sachs lesions. STUDY DESIGN: Controlled laboratory study...
August 5, 2016: American Journal of Sports Medicine
Yeong Kyoon Park, Sae Hoon Kim, Joo Han Oh
BACKGROUND: The purpose of this study was to evaluate the outcome of hemiarthroplasty for comminuted proximal humerus fractures and to verify the risk factors for functional and radiologic outcomes. MATERIALS AND METHODS: We treated 29 comminuted proximal humerus fractures by hemiarthroplasty with a low-profile prosthesis and a bone block graft, with an average follow-up period of 53.9 (24-119) months. The patients' mean age at surgery was 71.7 (52-85) years. We evaluated visual analog scale (VAS) scores for pain and satisfaction, active range of motion, modified University of California-Los Angeles (UCLA) score, and shortened Disabilities of the Arm, Shoulder, and Hand (QuickDASH) score...
August 2, 2016: Journal of Shoulder and Elbow Surgery
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