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https://www.readbyqxmd.com/read/29625251/the-influence-of-temporomandibular-joint-movement-parameters-on-dental-morphology
#1
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
#2
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...
March 27, 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
#3
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
#4
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
#5
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
#6
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...
March 1, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29444577/classification-of-scapular-body-fractures
#7
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
#8
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
#9
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
#10
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...
February 7, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29399445/arthroscopic-lateral-border-resection-in-medialized-scapula-neck-fractures
#11
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
#12
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
https://www.readbyqxmd.com/read/29332666/optimizing-reverse-shoulder-arthroplasty-component-position-in-the-setting-of-advanced-arthritis-with-posterior-glenoid-erosion-a-computer-enhanced-range-of-motion-analysis
#13
Jay D Keener, Brendan M Patterson, Nathan Orvets, Alexander W Aleem, Aaron M Chamberlain
BACKGROUND: Our study purpose was to determine the optimal glenoid and humeral reverse shoulder arthroplasty (RSA) component design and position in osteoarthritic shoulders with severe glenoid retroversion deformities. METHODS: Computed tomography scans from 10 subjects were analyzed with advanced software including RSA range of motion (ROM) analysis. Variables included glenoid component retroversion of 0°, 5°, 10°, 15°, and 20° and baseplate lateralization of 0, 5, and 10 mm...
February 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29299654/comparative-study-of-open-and-arthroscopic-coracoid-transfer-for-shoulder-anterior-instability-latarjet-computed-tomography-evaluation-at-a-short-term-follow-up-part-ii
#14
Bartłomiej Kordasiewicz, Maciej Kicinski, Konrad Małachowski, Janusz Wieczorek, Sławomir Chaberek, Stanisław Pomianowski
PURPOSE AND HYPOTHESIS: The aim of this study was to evaluate and to compare the radiological parameters after arthroscopic and open Latarjet technique via evaluation of computed tomography (CT) scans. Our hypothesis was that the radiological results after arthroscopic stabilisation remained in the proximity of those results achieved after open stabilisation. MATERIAL AND METHODS: CT scan evaluation results of patients after primary Latarjet procedure were analysed...
January 4, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29298261/automated-three-dimensional-measurement-of-glenoid-version-and-inclination-in-arthritic-shoulders
#15
Pascal Boileau, Damien Cheval, Marc-Olivier Gauci, Nicolas Holzer, Jean Chaoui, Gilles Walch
BACKGROUND: Preoperative computed tomography (CT) measurements of glenoid version and inclination are recommended for planning glenoid implantation in shoulder arthroplasty. However, current manual or semi-automated 2-dimensional (2D) and 3-dimensional (3D) methods are user-dependent and time-consuming. We assessed whether the use of a 3D automated method is accurate and reliable to measure glenoid version and inclination in osteoarthritic shoulders. METHODS: CT scans of osteoarthritic shoulders of 60 patients scheduled for shoulder arthroplasty were obtained...
January 3, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29244216/relationship-between-glenoid-deformity-and-gait-characteristics-in-a-rat-model-of-neonatal-brachial-plexus-injury
#16
Kelsey Hennen, Dustin L Crouch, Ian D Hutchinson, Zhongyu Li, Katherine Saul
Neonatal brachial plexus injury (NBPI) results in substantial postural and functional impairments associated with underlying muscular and osseous deformities. We examined the relationship between glenoid deformity severity and gait in a rat model of NBPI, an established model for studying the in vivo pathomechanics of NBPI. At 8 weeks post-operatively, we monitored the gait of 24 rat pups who exhibited varying degrees of glenoid deformity following unilateral brachial plexus neurectomy and chemodenervation interventions administered 5 days postnatal...
December 15, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29241661/glenoid-component-loosening-associated-with-increased-critical-shoulder-angle-at-midterm-follow-up
#17
Jonathan P Watling, Javier E Sanchez, Samuel P Heilbroner, William N Levine, Louis U Bigliani, Charles M Jobin
BACKGROUND: Glenoid component loosening is a common failure mode of total shoulder arthroplasty (TSA). A larger critical shoulder angle (CSA) may cause superior glenoid component loading and more rapid component loosening. The purpose of this study was to define the relationship between the CSA and glenoid component loosening in midterm follow-up after TSA. METHODS: We conducted a retrospective study of 61 primary TSAs for osteoarthritis with an average follow-up of 5...
March 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29113176/stereolithographic-model-assisted-reconstruction-of-the-mandibular-condyle-with-a-vascularized-fibular-flap-following-hemimandibulectomy-evaluation-of-morphological-and-functional-outcomes
#18
Hitoshi Yoshimura, Shinpei Matsuda, Seigo Ohba, Yoshiki Minegishi, Kunihiro Nakai, Shigeharu Fujieda, Kazuo Sano
The vascularized fibular flap is one of the standard treatment choices for the reconstruction of the mandible; however, the consequences of condylar restoration have not previously been reported. The use of three-dimensional models allows for a more predictable reconstruction. The purpose of the present study was to assess the outcome of stereolithographic model-assisted reconstruction of the mandibular condyle with a vascularized fibular flap. A total of 5 patients underwent mandibular resection including the condyle and immediate reconstruction with a vascularized fibular flap...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29100764/arthroscopic-versus-open-iliac-crest-bone-grafting-in-recurrent-anterior-shoulder-instability-with-glenoid-bone-loss-a-computed-tomography-based-quantitative-assessment
#19
Lukas Ernstbrunner, Fabian Plachel, Philipp Heuberer, Leo Pauzenberger, Philipp Moroder, Herbert Resch, Werner Anderl
PURPOSE: To assess the iliac crest bone graft (ICBG) position in the en-face view and axial plane comparing arthroscopic with open procedures. METHODS: A total of 40 consecutive patients with recurrent anterior shoulder instability and glenoid bone loss over 10% treated by 2 independent orthopaedic departments were included. Two independent observers analyzed preoperative and immediate postoperative computed tomography scans of 20 open (group O) and 20 arthroscopic (group A) procedures...
October 31, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29094054/can-a-drill-guide-improve-the-coracoid-graft-placement-during-the-latarjet-procedure-a-prospective-comparative-study-with-the-freehand-technique
#20
Johannes Barth, Achilleas Boutsiadis, Lionel Neyton, Laurent Lafosse, Gilles Walch
Background: One of the factors that can affect the success of the Latarjet procedure is accurate coracoid graft (CG) placement. Hypothesis: The use of a guide can improve placement of the CG and screw positioning in the sagittal and axial planes as compared with the classic open ("freehand") technique. Study Design: Cohort study; Level of evidence, 2. Methods: A total of 49 patients who underwent a Latarjet procedure for the treatment of recurrent anterior shoulder instability were prospectively included; the procedure was performed with the freehand technique in 22 patients (group 1) and with use of a parallel drill guide during screw placement in 27 patients (group 2)...
October 2017: Orthopaedic Journal of Sports Medicine
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