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https://www.readbyqxmd.com/read/29151568/a-comparison-of-the-mini-open-wiltse-approach-with-pedicle-screw-fixation-and-the-percutaneous-pedicle-screw-fixation-for-neurologically-intact-thoracolumbar-fractures
#1
Yong Fan, JiaNan Zhang, Xin He, YunFei Huang, QiNing Wu, DingJun Hao
BACKGROUND The thoracolumbar AO type A3 fracture is an incomplete burst fracture, which affects one vertebral body endplate. The objective of this study was to determine which of two minimal invasive techniques was more suitable for A3 fractures based on clinical and radiographic results. MATERIAL AND METHODS We studied 112 patients with A3 subtype fractures without neurological deficits. A total of 63 patients received percutaneous pedicle screw fixation (PPSF), and 49 patients were treated using mini-open Wiltse approach with pedicle screw fixation (MWPSF)...
November 20, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29141673/a-customized-fixation-plate-with-novel-structure-designed-by-topological-optimization-for-mandibular-angle-fracture-based-on-finite-element-analysis
#2
Yun-Feng Liu, Ying-Ying Fan, Xian-Feng Jiang, Dale A Baur
BACKGROUND: The purpose of this study was to design a customized fixation plate for mandibular angle fracture using topological optimization based on the biomechanical properties of the two conventional fixation systems, and compare the results of stress, strain and displacement distributions calculated by finite element analysis (FEA). METHODS: A three-dimensional (3D) virtual mandible was reconstructed from CT images with a mimic angle fracture and a 1 mm gap between two bone segments, and then a FEA model, including volume mesh with inhomogeneous bone material properties, three loading conditions and constraints (muscles and condyles), was created to design a customized plate using topological optimization method, then the shape of the plate was referenced from the stress concentrated area on an initial part created from thickened bone surface for optimal calculation, and then the plate was formulated as "V" pattern according to dimensions of standard mini-plate finally...
November 15, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29133325/minimally-invasive-surgery-versus-open-surgery-in-the-treatment-of-lumbar-spondylolisthesis-study-protocol-of-a-multicentre-randomised-controlled-trial-misos-trial
#3
Mark P Arts, Jasper Fc Wolfs, Jos Ma Kuijlen, Godard Cw de Ruiter
INTRODUCTION: Patients with symptomatic spondylolisthesis are frequently treated with nerve root decompression, in addition to pedicle screw fixation and interbody fusion. Minimally invasive approaches are gaining attention in recent years, although there is no clear evidence supporting the proclamation of minimally invasive spine surgery (MISS) being better than open surgery. We present the design of the MISOS (Minimal Invasive Surgery versus Open Surgery) trial on the effectiveness of MISS versus open surgery in patients with degenerative or spondylolytic spondylolisthesis...
November 12, 2017: BMJ Open
https://www.readbyqxmd.com/read/29069963/radiological-analysis-of-minimal-safe-distance-and-optimal-screw-angle-to-avoid-facet-violation-in-open-door-laminoplasty-using-precontoured-plate
#4
Woo-Kie Min, Il Seo, Sang-Bong Na, Young-Seo Choi, Ji-Yeon Choi
PURPOSE: This study aimed to present radiologic analysis of minimal safe distance (MSD) and optimal screw angle (OSA) that enables to fix screws in a lateral mass safely without facet joint violation in open-door laminoplasty using a plate. METHODS: A retrospective analysis was made of 22 patients (male: 17; female: 5), average age 62 years. Seventy-nine lateral mass screws were fixed among a total of 158 screws. MSD that doesn't allow 5-mm screws to violate a facet joint was measured for C3-C7 and a comparative analysis was performed...
September 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/29067065/mini-titanium-plates-hearkening-the-end-of-non-rigid-cranial-bone-flap-fixation
#5
Muhammad Junaid, Syed Sarmad Bukhari, Mobasher Ahmad Saeed, Mamoon Ur Rashid
BACKGROUND AND OBJECTIVE: Craniotomy bone flaps should be replaced for both cosmetic and protective purposes. Different methods are available commercially. The aim of this study was to assess outcome of bone flap fixation using mini titanium plates and screws. METHODS: Between March, 2011 and March, 2014, 71 patients underwent cranial bone flap fixation with mini titanium plates and screws after craniotomy and excision of supratentorial lesions at Combined Military Hospital, Peshawar...
July 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28888931/biomechanical-testing-of-zirconium-dioxide-osteosynthesis-system-for-le-fort-i-advancement-osteotomy-fixation
#6
Lukas Hingsammer, Markus Grillenberger, Martin Schagerl, Michael Malek, Stefan Hunger
The following work is the first evaluating the applicability of 3D printed zirconium dioxide ceramic miniplates and screws to stabilize maxillary segments following a Le-Fort I advancement surgery. Conventionally used titanium and individual fabricated zirconium dioxide miniplates were biomechanically tested and compared under an occlusal load of 120N and 500N using 3D finite element analysis. The overall model consisted of 295,477 elements. Under an occlusal load of 500N a safety factor before plastic deformation respectively crack of 2...
September 5, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28802422/management-of-neglected-acl-avulsion-fractures-a-case-series-and-systematic-review
#7
D K Chouhan, M S Dhillon, R John, A Khurana
INTRODUCTION: Neglected tibial eminence avulsion fractures of the anterior cruciate ligament (ACL) are uncommonly seen in modern times, but are fairly common due to a missed diagnosis/mismanagement in developing countries. OBJECTIVES: To determine the outcomes after open reduction and internal fixation of late presenting ACL avulsion fractures, and to review the literature for similar cases, in an attempt to evaluate the ideal surgical management in this unique scenario...
August 2017: Injury
https://www.readbyqxmd.com/read/28789957/mini-open-spinal-column-shortening-for-the-treatment-of-adult-tethered-cord-syndrome
#8
Michael M Safaee, Ethan A Winkler, Dean Chou
Tethered cord syndrome (TCS) is a challenging entity characterized by adhesions at the caudal spinal cord that prevent upward movement during growth and result in stretching of the cord with a concomitant constellation of neurologic symptoms. Although growth in height stops in adulthood, some patients still develop progressive symptoms; many underwent detethering as a child or adolescent, resulting in significant scar tissue and re-tethering. Recent strategies have focused on spinal column shortening to reduce tension on the spinal cord without exposing the previous de-tethering site...
October 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28760037/mini-open-anterior-approach-for-cervicothoracic-junction-fracture-technical-note
#9
Junichi Ohya, David P Bray, Stephen T Magill, Todd D Vogel, Sigurd Berven, Praveen V Mummaneni
Elderly patients with diffuse idiopathic skeletal hyperostosis are at high risk for falls, and 3-column unstable fractures present multiple challenges. Unstable fractures across the cervicothoracic junction are associated with significant morbidity and require fixation, which is commonly performed through a posterior open or percutaneous approach. The authors describe a novel, navigated, mini-open anterior approach using intraoperative cone-beam CT scanning to place lag screws followed by an anterior plate in a 97-year-old patient...
August 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28749837/occlusion-guided-double-barreled-fibular-osteoseptocutaneous-free-flap-for-refined-mandibular-reconstruction-aided-by-virtual-surgical-planning
#10
Xingzhou Qu, Mingyi Wang, Liqun Xu, Jiannan Liu, Shizhu Bai, Chenping Zhang
BACKGROUND: There were many articles about double-barreled fibular flap for mandibular reconstruction. The upper layer bone was suit for implant placement as a new alveolar. The lower layer was necessary for contour. But the accurate relationship between the 2 layers bone was rarely reported. OBJECTIVES: The purpose of this study was twofold: to evaluate the feasibility of the novel design of the double-barreled fibular flap from virtual surgery to actual result; to evaluate the accuracy and results of occlusion-guided double-barreled fibular free flap in mandible reconstruction...
September 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28705216/surgical-management-of-hawkins-type-iii-talar-neck-fracture-through-the-approach-of-medial-malleolar-osteotomy-and-mini-plate-for-fixation
#11
Hui Liu, Zhida Chen, Wenrong Zeng, Yuanfei Xiong, Yongzhi Lin, Huacheng Zhong, Jin Wu
BACKGROUND: Fractures of the talar neck are relatively uncommon yet current interventions suffer from a high incidence of complications and poor functional outcomes. In the present study, we report a surgical treatment of Hawkins type III talar neck fracture through the approach of medial malleolar osteotomy and mini-plate for fixation and discuss the therapeutic effects after long-term follow-up. METHODS: From January 2010 to January 2015, 21 patients with 22 fractures were treated using this approach within days of sustaining the injury...
July 14, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28658900/does-change-in-thread-shape-influence-the-pull-out-strength-of-mini-implants-an-in-vitro-study
#12
Aniruddh V Yashwant, S Dilip, R Krishnaraj, K Ravi
INTRODUCTION: Mini implants form a valuable source for absolute anchorage thereby helping in achieving ideal treatment outcome. Stability of the mini implant is one of the important factors affecting the success of mini implants. Thread shape is a critical factor in the engineering design of mini implant, which affects the primary stability. AIM: To evaluate the effects of thread shape on the pull out strength of mini implants. MATERIALS AND METHODS: Mini implants of five different designs in thread shape (reverse buttress, buttress, 75° joint profile with flutes, trapezoidal and trapezoidal fluted) were used with 10 screws in each group...
May 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28655630/a-novel-anterior-approach-for-the-fixation-of-ulnar-coronoid-process-fractures
#13
X Yang, W Chang, W Chen, S Liu, Y Zhu, Y Zhang
BACKGROUND: There is no universally accepted approach to the elbow for the fixation of coronoid process fractures. This study aims to introduce a novel anterior surgical approach for the fixation of the ulnar coronoid fracture, with minimal surgical dissection damage and excellent visualization for reduction and internal fixation. HYPOTHESIS: The anterior approach can facilitate satisfactory outcomes for coronoid process fractures. MATERIAL AND METHODS: From February 2010 to July 2014, 12 patients (8 males and 4 females; range 14-62years; mean age 31years) with a closed fracture of the coronoid process of the ulna were included in this study...
June 24, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28642663/weber-c-ankle-fractures-with-tibiofibular-diastasis-syndesmosis-only-fixation
#14
Serkan Sipahioglu, Sinan Zehir, Erdem Isikan
OBJECTIVES: To evaluate syndesmosis-only fixation in Weber C ankle fractures with tibiofibular diastasis and to assess the need for additional fibular fixation. METHODS: Twenty-one patients with Weber C ankle fractures and tibiofibular diastasis were followed for at least 24 months after treatment. In treatment of the Weber C fractures, only a syndesmosis screw was used through a mini open lateral incision if the syndesmosis could be anatomically reduced and fibular length and rotation could be restored...
May 2017: Acta Ortopedica Brasileira
https://www.readbyqxmd.com/read/28618308/supplementary-medial-locking-plate-fixation-of-ludloff-osteotomy-versus-sole-lag-screw-fixation-a-biomechanical-evaluation
#15
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
#16
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...
September 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28577891/treatment-of-posterior-cruciate-ligament-tibial-avulsion-by-a-minimally-invasive-open-posterior-approach
#17
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) ...
July 2017: Injury
https://www.readbyqxmd.com/read/28576006/the-role-of-welding-techniques-in-the-biomechanical-behavior-of-implant-supported-prostheses
#18
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
#19
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...
August 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
#20
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
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