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https://www.readbyqxmd.com/read/28333370/influence-of-nickel-titanium-rotary-systems-with-varying-tapers-on-the-biomechanical-behaviour-of-maxillary-first-premolars-under-occlusal-forces-a-finite-element-analysis-study
#1
S Askerbeyli Ors, A Serper
AIM: To evaluate the effect of three nickel-titanium (Ni-Ti) rotary systems with varying tapers on stress distribution and to analyse potential fracture patterns as well as the volume of fracture-susceptible regions in two-rooted maxillary premolars. METHODOLOGY: The root canals of three single-rooted premolars were prepared with either HeroShaper (Micro-Mega, Besançon, France) to (size 30, .04 taper), Revo-S (Micro-Mega) to AS30 (size 30, .06 taper) or ProTaper Universal (Dentsply Maillefer, Ballaigeus, Switzerland) to F3 (size 30, ...
March 23, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28332125/osteoarthritis-of-the-hip-joint-in-elderly-patients-is-most-commonly-atrophic-with-low-parameters-of-acetabular-dysplasia-and-possible-involvement-of-osteoporosis
#2
Yasuhiro Ishidou, Kanehiro Matsuyama, Daisuke Sakuma, Takao Setoguchi, Satoshi Nagano, Ichiro Kawamura, Shingo Maeda, Setsuro Komiya
As elderly patients with hip osteoarthritis aged, acetabular dysplasia parameters decreased (Sharp's angle, acetabular roof obliquity angle, and acetabular head index) and the incidence of the atrophic type increased. Vertebral body fracture was more frequent in the atrophic type, suggesting the involvement of osteoporosis at the onset of hip osteoarthritis. INTRODUCTION: Osteoarthritis (OA) is associated with increased bone formation at a local site. However, excessive bone resorption has also been found to occur in the early stages of OA...
December 2017: Archives of Osteoporosis
https://www.readbyqxmd.com/read/28323993/bisphosphonate-treatment-and-the-characteristics-of-femoral-fractures-in-children-with-osteogenesis-imperfecta
#3
Ilkka Vuorimies, Mervi K Mäyränpää, Helena Valta, Heikki Kröger, Sanna Toiviainen-Salo, Outi Mäkitie
CONTEXT: Bisphosphonates' (BPs) short-term benefits are evident in the treatment of children with osteogenesis imperfecta (OI) but some concerns related to long-term effects still remain. OBJECTIVE: To elucidate the effect of BPs on characteristics of femoral fractures in children with OI. DESIGN AND SETTING: Retrospective cohort study at a university hospital. PATIENTS AND MAIN OUTCOME MEASURE: Study included 93 patients with OI...
January 17, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28320209/anterolateral-ligament-of-the-knee-anatomy-function-imaging-and-treatment
#4
Ronak M Patel, Robert H Brophy
The anterolateral ligament (ALL) of the knee has gained attention recently for its potential role in rotational stability of the knee, especially in association with anterior cruciate ligament (ACL) injuries. Anatomic studies have characterized the ALL as it runs in an anteroinferior and oblique direction from the lateral distal femur to the anterolateral proximal tibia, although the prevalence and variance of this ligament are not well understood. Magnetic resonance imaging and ultrasound have identified the ligament and linked it with the classically described Segond fracture...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28294978/discriminative-features-in-three-autosomal-recessive-cutis-laxa-syndromes-cutis-laxa-iia-cutis-laxa-iib-and-geroderma-osteoplastica
#5
REVIEW
Ariana Kariminejad, Fariba Afroozan, Bita Bozorgmehr, Alireza Ghanadan, Susan Akbaroghli, Hamid Reza Khorram Khorshid, Faezeh Mojahedi, Aria Setoodeh, Abigail Loh, Yu Xuan Tan, Nathalie Escande-Beillard, Fransiska Malfait, Bruno Reversade, Thatjana Gardeitchik, Eva Morava
Cutis laxa is a heterogeneous condition characterized by redundant, sagging, inelastic, and wrinkled skin. The inherited forms of this disease are rare and can have autosomal dominant, autosomal recessive, or X-linked inheritance. Three of the autosomal recessive cutis laxa syndromes, namely cutis laxa IIA (ARCL2A), cutis laxa IIB (ARCL2B), and geroderma osteodysplastica (GO), have very similar clinical features, complicating accurate diagnosis. Individuals with these conditions often present with cutis laxa, progeroid features, and hyperextensible joints...
March 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28293333/percutaneous-cannulated-compression-screw-osteosynthesis-in-phalanx-fractures-the-surgical-technique-the-indications-and-the-results
#6
Eirini Liodaki, Tobias Kisch, Eike Wenzel, Peter Mailänder, Felix Stang
Objective: Fractures of metacarpals and phalanges are very common fractures, and there are a lot of treatment modalities. The purpose of the study was to describe the technique of percutaneous fixation of phalangeal fractures using a cannulated compression screw fixation system and its results. Methods: We conducted a prospective clinical study on 43 patients with different types of phalangeal fractures undergoing a percutaneous cannulated compression screw osteosynthesis. Parameters such as average operation time and clinical outcome were evaluated postoperatively...
2017: Eplasty
https://www.readbyqxmd.com/read/28260179/treatment-of-extra-articular-proximal-and-middle-phalangeal-fractures-of-the-hand-a-systematic-review
#7
REVIEW
D Verver, L Timmermans, R A Klaassen, C H van der Vlies, D I Vos, N W L Schep
The aim of the study was to systematically review the patient reported and functional outcomes of treatment for extra-articular proximal or middle phalangeal fractures of the hand in order to determine the best treatment options. The review methodology was registered with PROSPERO. A systematic literature search was conducted in electronic bibliographic databases. Two independent reviewers performed screening and data extraction. The evaluation of quality of the included studies was performed using the Structured Effectiveness Quality Evaluation scale...
March 4, 2017: Strategies in Trauma and Limb Reconstruction
https://www.readbyqxmd.com/read/28249978/the-influence-of-cartilage-thickness-at-the-sigmoid-notch-on-inclination-at-the-distal-radioulnar-joint
#8
M Ross, M Wiemann, S E Peters, R Benson, G B Couzens
AIMS: The aims of this study were: firstly, to investigate the influence of the thickness of cartilage at the sigmoid notch on the inclination of the distal radioulnar joint (DRUJ), and secondly, to compare the sensitivity and specificity of MRI with plain radiographs for the assessment of the inclination of the articular surface of the DRUJ in the coronal plane. PATIENTS AND METHODS: Contemporaneous MRI images and radiographs of 100 wrists from 98 asymptomatic patients (mean age 43 years, (16 to 67); 52 male, 53%) with no history of a fracture involving the wrist or surgery to the wrist, were reviewed...
March 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28244920/evaluating-internal-fixation-skills-using-surgical-simulation
#9
Geoffrey T Burns, Brandon W King, James R Holmes, Todd A Irwin
BACKGROUND: Open reduction and internal fixation (ORIF) is an essential skill for an orthopaedic surgeon, yet teaching its components to surgical residents poses challenges in both complexity and cost. Surgical simulation has demonstrated efficacy and is now a mandated component of residency programs, but the techniques and resources required for effective simulation vary greatly. We hypothesized that simulation of ORIF skills could be accomplished in a cost-effective, quantifiable, and reproducible manner and that this experience coupled with didactic learning would increase skill proficiency and enhance ORIF performance...
March 1, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28217386/true-oblique-axis-fracture-associated-with-congenital-anomalies-of-the-upper-cervical-spine-case-report-of-an-unusual-fracture-pattern
#10
Luis A Robles
BACKGROUND: Acute traumatic axis fractures are common cervical spine injuries often caused by road accidents or falls. They are usually classified into three different types, namely, odontoid fractures, Hangman's fractures, and miscellaneous fractures. Congenital malformations of the craniovertebral junction (CVJ), although typically asymptomatic, may result in neural compression or instability, especially following trauma. Here, the authors present an unusual oblique axis fracture occurring in conjunction with several malformations of the upper cervical spine...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28211303/proposal-of-new-classification-of-femoral-trochanteric-fracture-by-three-dimensional-computed-tomography-and-relationship-to-usual-plain-x-ray-classification
#11
Etsuo Shoda, Shimpei Kitada, Yu Sasaki, Hitoshi Hirase, Takahiro Niikura, Sang Yang Lee, Atsushi Sakurai, Keisuke Oe, Takeharu Sasaki
PURPOSE: Classification of femoral trochanteric fractures is usually based on plain X-ray findings using the Evans, Jensen, or AO/OTA classification. However, complications such as nonunion and cut out of the lag screw or blade are seen even in stable fracture. This may be due to the difficulty of exact diagnosis of fracture pattern in plain X-ray. Computed tomography (CT) may provide more information about the fracture pattern, but such data are scarce. In the present study, it was performed to propose a classification system for femoral trochanteric fractures using three-dimensional CT (3D-CT) and investigate the relationship between this classification and conventional plain X-ray classification...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28205465/biomechanics-of-internal-fixation-modalities-for-middle-phalangeal-base-fracture-dislocation
#12
Gen-Lin Foo, Amit K Ramruttun, Andre Eujin Cheah, Alphonsus Kin-Sze Chong, Tun-Lin Foo
BACKGROUND: Internal fixation modalities of unstable (>50 percent articular involvement) middle phalangeal volar lip fracture-dislocations include interfragmentary screw and volar buttress plating. This study investigates the mechanical properties (yield strength, ultimate tensile strength, and stiffness) of interfragmentary screw (IS), simple buttress plating (BP) and buttress plating with subchondral screw (BP+S). METHODS: Fifteen cadaveric digits (5 index, 5 middle, and 5 ring) were prepared by excising its skin envelope and flexor tendons while preserving the structures around the proximal interphalangeal joint...
March 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/28182135/transverse-and-oblique-long-bone-fracture-evaluation-by-low-order-ultrasonic-guided-waves-a-simulation-study
#13
Ying Li, Dan Liu, Kailiang Xu, Dean Ta, Lawrence H Le, Weiqi Wang
Ultrasonic guided waves have recently been used in fracture evaluation and fracture healing monitoring. An axial transmission technique has been used to quantify the impact of the gap breakage width and fracture angle on the amplitudes of low order guided wave modes S0 and A0 under a 100 kHz narrowband excitation. In our two dimensional finite-difference time-domain (2D-FDTD) simulation, the long bones are modeled as three layers with a soft tissue overlay and marrow underlay. The simulations of the transversely and obliquely fractured long bones show that the amplitudes of both S0 and A0 decrease as the gap breakage widens...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28160904/the-vascular-anatomy-of-the-capitate-new-discoveries-using-micro-computed-tomography-imaging
#14
Assaf Kadar, Mohamed Morsy, Yoo-Joon Sur, Alexis T Laungani, Osman Akdag, Steven L Moran
PURPOSE: To study the intraosseous 3-dimensional microvasculature of the capitate bone using a novel high-resolution micro-computed tomography (μCT) imaging technology, and to examine the blood supply as it relates to the most common fracture types. METHODS: Ten cadaveric wrists were injected with a lead-based contrast agent. The capitates were harvested and imaged using a μCT scanner. The intraosseous vascularity was incorporated into a 3-dimensional image. We measured the vascular pattern as well as the vessels' cross-sectional area, number, and distribution...
February 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28157080/atypical-fractures-of-the-femur-associated-with-chronic-treatment-with-bisphosphonates
#15
Grzegorz Fijewski, Bartłomiej Szostakowski, Radosław Górski, Piotr Modzelewski, Piotr Dudek, Paweł Małdyk
BACKGROUND: The problem of atypical fractures, such as subtrochanteric or diaphyseal femoral fractures, associated with long-term treatment with bisphosphonates (BPs) has recently been given increasingly more attention. These fractures develop as stress fractures and are characterised by diaphyseal cortical thickening and a transverse or slightly oblique fracture line. The use of bisphosphonates has been documented to reduce the risk of osteoporotic fractures. However, an increasing number of papers verify the safety and benefits of the administration of these drugs over more than 3-5 years...
May 5, 2016: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28152185/mechanical-properties-of-canine-osteosarcoma-affected-antebrachia
#16
Michele A Steffey, Tanya C Garcia, Leticia Daniel, Allison L Zwingenberger, Susan M Stover
OBJECTIVE: To determine the influence of neoplasia on the biomechanical properties of canine antebrachia. STUDY DESIGN: Ex vivo biomechanical study. SAMPLE POPULATION: Osteosarcoma (OSA)-affected canine antebrachia (n = 12) and unaffected canine antebrachia (n = 9). METHODS: Antebrachia were compressed in axial loading until failure. A load-deformation curve was used to acquire the structural mechanical properties of neoplastic and unaffected specimens...
February 2, 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28144761/addition-of-the-apical-oblique-projection-increases-the-detection-of-acute-traumatic-shoulder-abnormalities-in-adults
#17
Kimberley J Ross, Grant R Tomkinson, Bonnie F McGregor, Oliver C Ayres, Diana Piscitelli
PURPOSE: Plain radiographic evaluation of acute shoulder trauma in adults requires a minimum of two projections, commonly the anteroposterior (AP) and lateral scapular projections, with additional projections taken for diagnosis. The aim of this retrospective study was to determine whether the addition of the apical oblique (AO) projection to the AP and lateral scapular projections increases the number and/or alters the types of abnormalities detected in the examination of acute shoulder trauma...
February 1, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/28141692/biomechanical-analysis-of-retrograde-flexible-intramedullary-nail-constructs-in-a-simulated-pediatric-femur-fracture-model
#18
Daniel C Bland, Sheena R Black, William A Pierce, Robert L Wimberly, Anthony I Riccio
BACKGROUND: Various flexible intramedullary nail (FIMN) constructs for pediatric femur fractures are described; however, no biomechanical study has compared stability of medial-lateral entry versus all-lateral entry retrograde nailing. Our purpose is to compare the rotational and bending stiffness of 2 different FIMN constructs and 2 different materials in a simulated pediatric femur fracture model. METHODS: Eighty adolescent-sized composite femurs were used to simulate transverse (40 femurs) and oblique (40 femurs) mid-diaphyseal fractures...
January 30, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28138434/concurrent-lateral-condyle-mass-fracture-with-olecranon-fracture-a-case-report-and-brief-review-of-literature
#19
Munir Farooq, Younis Kamal, Hayat Ahmad Khan, Naseemul Gani, Adil Bashir Shah, Mohammed Ashraf Khan, Shahid Bhat
INTRODUCTION: There is very limited literature describing the association of lateral condyle mass (LCM) fracture of the distal humerus associated concurrently with olecranon fracture. Herein, a case is reported of a displaced LCM fracture with displaced olecranon fracture, due to complex trauma while getting out of a vehicle, which was managed by open reduction and internal fixation. CASE PRESENTATION: A 4.5- year- old boy suffered severe pain and swelling around his right elbow due to trauma which he suffered while trying to get out of a vehicle which was in motion...
September 2016: Archives of Trauma Research
https://www.readbyqxmd.com/read/28126003/magnetic-resonance-imaging-evaluation-of-the-distal-oblique-bundle-in-the-distal-interosseous-membrane-of-the-forearm
#20
Yeon Ho Kim, Hyun Sik Gong, Jin Woo Park, Hyun Kyung Yang, Kahyun Kim, Goo Hyun Baek
BACKGROUND: Some cadaveric studies have reported the role of the distal oblique bundle (DOB) in the distal radioulnar joint stability. We aimed to determine whether the presence of the DOB can be identified and its thickness can be measured in magnetic resonance imaging (MRI) examinations. METHODS: We retrospectively reviewed 468 wrist and forearm MRIs. Inclusion criteria were wrist or forearm MRIs taken in patients older than 18 years of age, and exclusion criteria were patients with acute wrist or forearm fractures, infections, or malignant tumors...
January 26, 2017: BMC Musculoskeletal Disorders
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