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https://www.readbyqxmd.com/read/28618308/supplementary-medial-locking-plate-fixation-of-ludloff-osteotomy-versus-sole-lag-screw-fixation-a-biomechanical-evaluation
#1
Panagiotis E Chatzistergos, George C Karaoglanis, Stavros K Kourkoulis, Minos Tyllianakis, Emmanouil D Stamatis
BACKGROUND: The Ludloff oblique osteotomy is inherently unstable, which might lead to delayed union and loss of correction. Supplementary fixation to two lag screw fixation has been proposed. The hypothesis is that the osteotomy fixation constructs supplemented by a mini locking plate provide greater resistance to osteotomy gaping and loss of angular correction in response to cyclic loading. METHODS: Twenty fourth generation composite 1st metatarsals were used and underwent a Ludloff osteotomy...
June 7, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28598220/bone-and-cortical-bone-thickness-of-mandibular-buccal-shelf-for-mini-screw-insertion-in-adults
#2
Riccardo Nucera, Antonino Lo Giudice, Angela Mirea Bellocchio, Paola Spinuzza, Alberto Caprioglio, Letizia Perillo, Giovanni Matarese, Giancarlo Cordasco
OBJECTIVE: To analyze the buccal bone thickness, bone depth, and cortical bone depth of the mandibular buccal shelf (MBS) to determine the most suitable sites of the MBS for mini-screw insertion. MATERIALS AND METHODS: The sample included cone-beam computed tomographic (CBCT) records of 30 adult subjects (mean age 30.9 ± 7.0 years) evaluated retrospectively. All CBCT examinations were performed with the i-CAT CBCT scanner. Each exam was converted into DICOM format and processed with OsiriX Medical Imaging software...
June 9, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28577891/treatment-of-posterior-cruciate-ligament-tibial-avulsion-by-a-minimally-invasive-open-posterior-approach
#3
Ahmed Abdelbadie Abdallah, Mohammed S Arafa
OBJECTIVE: To assess the surgical technique and report the outcomes following fixation of PCL bony avulsions through mini-invasive posterior knee approach as described by Burks and Schaffer. METHODS: From June 2012 to July 2015, 27 patients enrolled in the study (21 males and 6 females). Fixation of tibial PCL avulsion fractures was done with one or two cannulated screws, or sutures through Burks and Schaffer's approach. The mean interval before surgery was 16days (1-70) ...
May 26, 2017: Injury
https://www.readbyqxmd.com/read/28576006/the-role-of-welding-techniques-in-the-biomechanical-behavior-of-implant-supported-prostheses
#4
Sabrina Alessandra Rodrigues, Anna Gabriella Camacho Presotto, Valentim Adelino Ricardo Barão, Rafael Leonardo Xediek Consani, Mauro Antônio Arruda Nóbilo, Marcelo Ferraz Mesquita
This in vitro study investigated the role of welding techniques of implant-supported prostheses in the 2D and 3D marginal misfits of prosthetic frameworks, strain induced on the mini abutment, and detorque of prosthetic screws. The correlations between the analyzed variables were also investigated. Frameworks were cast in commercially pure titanium (cp-Ti). A marginal misfit of 200μm was simulated in the working models (control group) (n=20). The 2D marginal misfit was analyzed according to the single-screw test protocol using a precision optical microscope...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28548998/zygomaticomaxillary-complex-fractures-diagnosis-and-treatment
#5
Nicholas Peretti, Stephen MacLeod
PURPOSE OF REVIEW: To provide an overview of zygomaticomaxillary complex (ZMC) fractures and their treatment. Aspects of anatomy, diagnosis, and treatment objectives of these common fractures will be reviewed including recent literature. RECENT FINDINGS: Advances in technology such as guided surgery have allowed for better outcomes and a reduction in surgeon variability with regard to postoperative results. The use of titanium and bioresorbable mini screws and plates have expanded the ability to achieve stable and predictable results...
May 25, 2017: Current Opinion in Otolaryngology & Head and Neck Surgery
https://www.readbyqxmd.com/read/28507963/evaluation-of-efficacy-of-three-dimensional-stainless-steel-mini-plates-in-the-treatment-of-fractures-of-the-mandible-a-prospective-study
#6
Shreyas H Gupte, Shruti Chaddva, Yash Jethwani, Aditi Mohandas, Digvijay P Kumavat, Nirali Jhaveri
INTRODUCTION: The purpose of the study was to analyze whether adequate fracture fixation can be achieved by three-dimensional (3D) stainless steel mini-plates its ease of placement, whether the patient can resume function early and to find out the need to do intermaxillary fixation. MATERIALS AND METHODS: In the prospective study, we treated 12 patients and 17 fractured sites using 3D mini-plates. Once fracture reduction was achieved temporary intermaxillary fixation (IMF) was done occlusion was achieved and the fractured segments were fixed using 3D plates either 4-holed or 6-holed of 2...
November 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28482654/surface-initiated-controlled-radical-polymerization-approach-to-enhance-nanocomposite-integration-of-cellulose-nanofibrils
#7
Julien R G Navarro, Ulrica Edlund
A strategy is devised for the conversion of hydrophilic cellulose nanofibrils (CNFs) into hydrophobic CNF that form a stable nanocomposite dispersion for functional reinforcement of a polypropylene matrix. For that purpose, CNF was converted to a CNF-based microinitiator through an esterification reaction on the nanofibril surfaces, which efficiently initiated the controlled radical grafting polymerization of stearyl acrylate. The grafting-from modification was performed with and without a sacrificial initiator and verified with solid-state (13)C nuclear magnetic resonance and Fourier transform infrared spectroscopy...
May 16, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28439314/correction-of-lower-limb-deformities-in-children-with-renal-osteodystrophy-by-guided-growth-technique
#8
C Gigante, A Borgo, M Corradin
PURPOSE: Renal osteodystrophy (ROD) may cause severe lower limb deformities in children. The purpose of this study is to evaluate the efficacy of the temporary hemiepiphysiodesis for the correction of lower limb deformities in children with ROD. METHODS: Guided growth correction by hemiepiphysiodesis has been performed in skeletally immature patients with deformities of the lower limbs caused by ROD. The correction of the mechanical axes of the lower limbs and its correction speed have been evaluated...
2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28439162/evaluating-the-effect-of-minimizing-screws-on-stabilization-of-symphysis-mandibular-fracture-by-3d-finite-element-analysis
#9
Ghias Kharmanda, Mohamed-Yaser Kharma
PURPOSE: The objective of this work is to integrate structural optimization and reliability concepts into mini-plate fixation strategy used in symphysis mandibular fractures. The structural reliability levels are next estimated when considering a single failure mode and multiple failure modes. PATIENTS AND METHODS: A 3-dimensional finite element model is developed in order to evaluate the ability of reducing the negative effect due to the stabilization of the fracture...
June 2017: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/28413065/outcome-of-low-profile-mesh-plate-in-management-of-comminuted-displaced-fracture-patella
#10
Mohamed S Singer, Abdelsamie M Halawa, Adel Adawy
PURPOSE: To assess the clinical results of using mesh plate in management of displaced comminuted fracture patella. PATIENTS AND METHODS: Between January 2014 and October 2015, nine patients with closed displaced comminuted fracture patella were fixed using mesh plate and 2mm mini screws. RESULTS: All fractures united after an average of 10 weeks. At final follow-up of an average 19.6 months, average postoperative Lysholm score was 89.1±4...
March 23, 2017: Injury
https://www.readbyqxmd.com/read/28384945/excision-versus-fixation-of-the-radial-head-a-comparative-study-of-the-functional-outcomes-of-the-two-techniques
#11
Sanath Kumar Shetty, Ashwin Shetty, Bijith Balan, Arjun Ballal, H Ravindranath Rai, Anoop Hegde
INTRODUCTION: The management of displaced and comminuted radial head fractures has been a matter of debate amongst surgeons for many years. Radial head excision formed the mainstay of surgical management of these injuries. Over the years, there have been improvements in the surgical techniques and availability of better implants and instrumentation techniques, hence, open reduction and internal fixation of these fractures is gaining popularity. AIM: To compare the outcome of elbow function between radial head excision and open reduction and internal fixation of the radial head with mini screws of Mason Type II and Type III radial head fractures and to assess the complications that occur in both techniques...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28382830/effect-of-interfragmentary-gap-on-compression-force-in-a-headless-compression-screw-used-for-scaphoid-fixation
#12
E S Tan, I S Mat Jais, S Abdul Rahim, S C Tay
We investigated the effect of an interfragmentary gap on the final compression force using the Acutrak 2 Mini headless compression screw (length 26 mm) (Acumed, Hillsboro, OR, USA). Two blocks of solid rigid polyurethane foam in a custom jig were separated by spacers of varying thickness (1.0, 1.5, 2.0 and 2.5 mm) to simulate an interfragmentary gap. The spacers were removed before full insertion of the screw and the compression force was measured when the screw was buried 2 mm below the surface of the upper block...
April 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/28376676/evaluation-of-maxillary-sinus-volume-and-dimensions-in-different-vertical-face-growth-patterns-a-study-of-cone-beam-computed-tomography
#13
Rıdvan Okşayan, Oral Sökücü, Seher Yeşildal
OBJECTIVE: This study aimed to compare sinus volume and dimensions in patients with high-, low-, and normal-angle vertical growth patterns using cone-beam computed tomography (CBCT). MATERIALS AND METHODS: According to skeletal vertical face growth patterns, 60 adults (31 female, 29 male, average age: 29.90 ± 10.91 years) were divided into three groups equally: high-angle, low-angle, and normal-angle groups. Cephalometric tracings were obtained from CBCT images and SN-GoGn (angle between Sella-Nasion line and Gonion-Gnathion line) cephalometric angular measurements used for the classification of skeletal vertical pattern evaluations...
April 4, 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/28349251/the-effect-of-magnesium-on-early-osseointegration-in-osteoporotic-bone-a-histological-and-gene-expression-investigation
#14
S Galli, M Stocchero, M Andersson, J Karlsson, W He, T Lilin, A Wennerberg, R Jimbo
Magnesium has a key role in osteoporosis and could enhance implant osseointegration in osteoporotic patients. Titanium implants impregnated with Mg ions were installed in the tibia of ovariectomized rats. The release of Mg induced a significant increase of bone formation and the expression of anabolic markers in the peri-implant bone. INTRODUCTION: The success of endosseous implants is highly predictable in patients possessing normal bone status, but it may be impaired in patients with osteoporosis...
March 27, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28339580/the-integration-of-orthodontic-miniscrews-under-mechanical-loading-a-pre-clinical-study-in-rabbit
#15
B Giuliano Maino, Alberto Di Blasio, Davide Spadoni, Francesca Ravanetti, Carlo Galli, Antonio Cacchioli, Christos Katsaros, Mauro Gandolfini
Introduction: Orthodontic miniscrews are an increasingly popular choice to achieve absolute anchorage. The temporary use of miniscrews and their recent introduction have limited the debate over the biological aspect of the materials to that of the surface that permeates the field of dental implants. The aim of the present study was to investigate the integration of grade 5 titanium mini-implants with machined or sand blasted acid etched surface (SAE) under mechanical load in a rabbit tibia model of implant integration...
January 18, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28318375/fracture-strength-of-standard-and-small-diameter-prosthetic-abutments-for-full-arch-implant-supported-restorations
#16
Bruno Costa Martins de Sá, Augusto Ricardo Andrighetto, Sérgio Rocha Bernardes, Rodrigo Tiossi
The fracture strength of prosthetic abutments with different sizes and combinations to support a 5 implant milled framework with distal extension was tested. Prosthetic abutments with different dimensions (4.8 mm diameter mini-conical abutment and 3.5 mm diameter micro-conical abutment) were screwed to 5 threaded implants. The following groups were divided (n=3): G1 with 5 mini-conical abutments (standard size), G2 with 5 micro-conical abutments (small sized), G3 with a combination of 3 small sized abutments and 2 standard sized abutments, and G4 with a combination of 2 small sized abutments and 3 standard sized abutments...
March 20, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28314869/-operative-treatment-of-terrible-triad-injury-of-the-elbow-open-reduction-and-internal-fixation
#17
R Babst, C Schraner, F J P Beeres
AIM OF SURGERY: Reconstruction of the most important ligamentous and osseus structures of the elbow after terrible triad injury via the radial head to the lateral collateral ligament complex (LCL) and if necessary beginning at the coronoid process. The aim is a stable concentrically guided elbow with early functional follow-up treatment. The approach depends on the intraoperatively tested stability. INDICATIONS: Osteoligamentous terrible triad injury pattern with or without subluxation position following reduction and temporary immobilization...
April 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28302305/absolute-or-relative-stability-in-minimal-invasive-plate-osteosynthesis-of-simple-distal-meta-or-diaphyseal-tibia-fractures
#18
R Wenger, F Oehme, J Winkler, S M Perren, R Babst, F J P Beeres
INTRODUCTION: Minimal invasive plate osteosynthesis in simple distal meta or diaphyseal tibia fractures can be applied using absolute (lag screw and neutralisation plate; LSN) or relative stability (bridge plate; BP). The primary aim of the study was to compare time to radiological union and time to full weight bearing in the two groups (LSN vs. BP). Reduction was performed either percutaneously or by a minimally open approach (mini open). Secondary aim was to analyse the number of complications between both groups...
March 6, 2017: Injury
https://www.readbyqxmd.com/read/28267907/-imaging-of-the-calcaneus-applied-to-the-internal-fixation-of-fractures-by-a-sinus-tarsi-approach
#19
G Slullitel, J Calvi, A Calvo, M Seletti, V López, V Álvarez
OBJECTIVE: The mini-invasive technique, through a sinus tarsi approach (STA), has become an increasingly popular choice for the treatment of calcaneal fractures. However, despite the good results reported, the complications related with internal fixation have not yet been analyzed. Using 3D reconstruction CT scans, we proposed doing biometric description of the calcaneus with the purpose of performing osteosynthesis as treatment for calcaneal fractures. METHODS: A total of 24 CT scans were retrospectively obtained from 22 consecutive patients with healthy calcanei and no history of surgery or fracture...
July 2016: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/28264589/minimally-invasive-spinal-surgery-for-the-management-of-symptomatic-spinal-metastasis
#20
Abdulkader Hamad, Leonidas Vachtsevanos, Andrew Cattell, Matthew Ockendon, Birender Balain
INTRODUCTION: Symptomatic metastatic spinal disease is on the increase. Minimally invasive spinal surgery has been associated with a lower complication profile when compared to traditional open methods; however there is paucity of literature evaluating the place of percutaneous pedicle screw fixation (PPSF) in the management of spinal metastases. The purpose of the study is to assess the efficacy of Minimally Invasive Spine Surgery (MISS) using PPSF with or without mini-decompression in the management of symptomatic spinal metastases...
March 6, 2017: British Journal of Neurosurgery
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