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https://www.readbyqxmd.com/read/28431451/-experience-with-the-hind-foot-relaxation-boot
#1
Hans Zwipp, Michael Borrmann, Eberhard Walter
The goal of this paper is to report our experience with hindfoot fractures using our specially developed boot, with a follow-up of 557 cases. This boot works like the well-known Allgöwer-Röck ortheses (ARO), but is a hybrid between a boot and an orthesis. It allows full weightbearing without using crutches and completely protects an acutely operated hind foot fracture, hind foot arthrodesis or a hind foot fracture which is suitable for conservative treatment. In its first generation, this boot was custom made and used in 408 cases, from March 1999 to February 2011...
April 21, 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/28429741/the-risk-of-translaminar-screw-fixation-to-the-transverse-foramen-of-the-lower-cervical-spine-a-computed-tomography-study
#2
Ganggang Kong, Wei Ji, Zucheng Huang, Junhao Liu, Jianting Chen, Qingan Zhu
Translaminar screw fixation (TSF) of the axis is considered as an efficient, safe and simple surgical procedure, however the study of the potential risk of TSF to the transverse foramen in lower cervical spine is lacked. Head-neck CT images of 60 patients were included in this study. Maximum screw length, laminar thickness, the screw angle and the laminar height were measured. The feasibility of 3.5-mm diameter screw fixation and the potential risk of transverse foramen injury was analyzed. The TSF was safe at C3 and C4, but risky to the transverse foraman at a rate of 8...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28429501/formation-of-macromolecules-in-wheat-gluten-starch-mixtures-during-twin-screw-extrusion-effect-of-different-additives
#3
Kaiqiang Wang, Cheng Li, Bingzhi Wang, Wen Yang, Shuizhong Luo, Yanyan Zhao, Shaotong Jiang, Dongdong Mu, Zhi Zheng
BACKGROUND: Wheat gluten comprises a good quality and inexpensive vegetable protein with an ideal amino acid composition. To expand the potential application of wheat gluten in the food industry, the effect of different additives on the physicochemical and structural properties of wheat gluten/starch mixtures during twin-screw extrusion was investigated. RESULTS: Macromolecules were observed to form in wheat gluten/starch mixtures during twin-screw extrusion, which may be ascribed to the formation of new disulfide bonds and non-covalent interactions, as well as Maillard reaction products...
April 21, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28429394/immediate-implant-placement-and-restoration-in-the-anterior-maxilla-tissue-dimensional-changes-after-2-5-year-follow-up
#4
Himanshu Arora, Nabil Khzam, David Roberts, William L Bruce, Saso Ivanovski
BACKGROUND: Immediate implant placement followed by an immediate restoration has proven to be a viable technique in the anterior maxillary region. PURPOSE: This prospective study evaluated the mid-long term (2-5 years) tissue changes around immediately placed and restored implants in the anterior maxilla using flapless surgery and simultaneous hard tissue augmentation. MATERIALS AND METHODS: Thirty AstraTech implants were immediately placed in 30 patients, followed by the delivery of an immediate provisional restoration on the same day...
April 21, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28429365/a-randomized-clinical-trial-about-presence-of-pathogenic-microflora-and-risk-of-peri-implantitis-comparison-of-two-different-types-of-implant-abutment-connections
#5
F Mencio, F De Angelis, P Papi, D Rosella, G Pompa, S Di Carlo
OBJECTIVE: The aim of this in vivo study was to evaluate two different types of implant-abutment connections: screwed connection and cemented connection, analyzing peri-implant bacteria microflora as well as other clinical parameters. PATIENTS AND METHODS: Twenty implants were selected, inserted in 20 patients, 10 with a screwed implant-abutment connection (Group 1) and 10 with a cemented implant-abutment connection (Group 2). The peri-implant microflora was collected, after at least 360 days from the prosthetic rehabilitation, using paper points inserted in peri-implant sulcus for 30 s...
April 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28429173/a-new-approach-to-local-dco-in-ankle-fracture-dislocations-external-fixation-with-diaphyseal-unicortical-screws-applied-by-local-anaesthesia
#6
F Lavini, T Maluta, G Carpeggiani, C Dall'Oca, E Samaila, G Marconato, B Magnan
PURPOSE: Ankle fracture dislocations represent a great threat for soft tissue viability and articular instability. The use of a temporary ankle bridging ExFix plays a fundamental role in the local damage control orthopaedics while waiting for definitive synthesis. METHODS: For this prospective research, we have developed a full application protocol of innovative diaphyseal monocortical screws fixator (Unyco-Orthofix(TM)) exclusively under local anaesthesia. Rigid selection criteria allowed us to collect nine patients during a period of almost 2 years...
April 20, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28428982/biomechanical-effect-of-pedicle-screw-distribution-in-ais-instrumentation-using-a-segmental-translation-technique-computer-modeling-and-simulation
#7
Xiaoyu Wang, A Noelle Larson, Dennis G Crandall, Stefan Parent, Hubert Labelle, Charles G T Ledonio, Carl-Eric Aubin
BACKGROUND: Efforts to select the appropriate number of implants in adolescent idiopathic scoliosis (AIS) instrumentation are hampered by a lack of biomechanical studies. The objective was to biomechanically evaluate screw density at different regions in the curve for AIS correction to test the hypothesis that alternative screw patterns do not compromise anticipated correction in AIS when using a segmental translation technique. METHODS: Instrumentation simulations were computationally performed for 10 AIS cases...
2017: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/28428920/surgical-strategy-and-techniques-for-low-profile-dorsal-plating-in-treating-dorsally-displaced-unstable-distal-radius-fractures
#8
Yoshitaka Hamada, Hiroyuki Gotani, Naohito Hibino, Yoshitaka Tanaka, Ryousuke Satoh, Kousuke Sasaki, Thepparat Kanchanathepsak
Background The low-profile dorsal locking plating (DLP) technique is useful for treating dorsally comminuted intra-articular distal radius fractures; however, due to the complications associated with DLP, the technique is not widely used. Methods A retrospective review of 24 consecutive cases treated with DLP were done. Results All cases were classified into two types by surgical strategy according to the fracture pattern. In type 1, there is a volar fracture line distal to the watershed line in the dorsally displaced fragment, and this type is treated by H-framed DLP...
May 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28428081/intraoperative-image-guidance-compared-with-free-hand-methods-in-adolescent-idiopathic-scoliosis-posterior-spinal-surgery-a-systematic-review-on-screw-related-complications-and-breach-rates
#9
Andrew Chan, Eric Parent, Karl Narvacan, Cindy San, Edmond Lou
BACKGROUND CONTEXT: Severe adolescent idiopathic scoliosis (AIS) is a 3D spinal deformity requiring surgery to stop curve progression. Posterior spinal instrumentation and fusion with pedicle screws is the standard surgery for AIS curve correction. Vascular and neurologic complications related to screw-malpositioning are concerns in surgeries for AIS. Breach rates are reported at 15.7%, implant-related complications at 1.1% and neurologic deficit at 0.8%. Free-hand screw insertion remains the prevailing method of screw placement while image guidance has been suggested to improve placement accuracy...
April 17, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28427978/prevalence-of-ponticulus-posticus-on-lateral-cephalometric-radiographs-its-association-with-cervicogenic-headache-and-a-review-of-literature
#10
Shahnaz S Tambawala, Freny R Karjodkar, Kaustubh Sansare, Digvijay Motghare, Isha Mishra, Shuddhodhan Gaikwad, Amaresh Chandra Dora
OBJECTIVES: The aim of this study was to calculate the prevalence of ponticulus posticus: a small bony bridge on the dorsal aspect of the Atlas on lateral digital cephalometric radiographs and classify it into a complete ring or an incomplete ring. The study also investigated its association with the presence or absence of cervicogenic headache in the examined population if any and presents a literature review on Ponticulus posticus. METHODS: The presence and types of ponticuli posticus were investigated on 500 digital lateral cephalograms and the same patients were questioned for a history of cervicogenic headache...
April 17, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28425561/creating-homogenous-strain-distribution-within-3d-cell-encapsulated-constructs-using-a-simple-and-cost-effective-uniaxial-tensile-bioreactor-design-and-validation-study
#11
Gayathri Subramanian, Mostafa Elsaadany, Callan Bialorucki, Eda Yildirim-Ayan
Mechanical loading bioreactors capable of applying uniaxial tensile strains are emerging to be a valuable tool to investigate physiologically-relevant cellular signaling pathways and biochemical expression. In this study, we have introduced a simple and cost-effective uniaxial tensile strain bioreactor for the application of precise and homogenous uniaxial strains to 3D cell-encapsulated collagen constructs at physiological loading strains (0-12%) and frequencies (0.01-1 Hz). The bioreactor employs silicone-based loading chambers specifically designed to stretch constructs without direct gripping to minimize stress concentration at the ends of the construct and preserve its integrity...
April 20, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28425552/the-effect-of-chemical-ordering-and-lattice-mismatch-on-structural-transitions-in-phase-segregating-nanoalloys
#12
Kevin Rossi, Francesca Baletto
We elucidate the effect of lattice mismatch and chemical ordering on structural transitions in bimetallic nanoalloys of ∼1.5 nm. We show that collective screw dislocation motions happen in small mismatch shell@core systems while strongly mismatched ones favour incomplete outer shell rearrangements. Cooperative transitions can also become hindered when the chemical ordering breaks the geometrical symmetry. Escaping from an unfavourable morphological basin occurs first via re-arrangements of the geometry and then changes towards a better chemical pattern...
April 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28424851/vascularized-fibular-medialization-for-reconstruction-of-the-tibial-defects-following-tumour-excision
#13
Abed El-Negery, Nabil Ahmed Elmoghazy, Mohamed Serry Abd-Ellatif, Adham Elgeidi
PURPOSE: The purpose of this study was to evaluate the functional and oncologic results of fibular medialization when used alone as a single-stage reconstructive technique after wide excision of malignant tumours of the proximal, middle, or distal tibia. METHODS: Between December 2010 and May 2015, 14 patients (six males and eight females) with primary malignant tumours of the tibia (eight proximal, four diaphyseal, two distal) were treated by wide excision. The mean age of the patients at the time of surgery was 23...
April 19, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28422889/an-in-vitro-biomechanical-evaluation-of-an-expansive-double-threaded-bi-directional-compression-screw-for-fixation-of-type-ii-odontoid-process-fractures-a-squire-compliant-article
#14
Ning Liu, Li Tian, Rong-Xian Jiang, Chao Xu, Lei Shi, Wei Lei, Yang Zhang
Odontoid process fracture accounts for 5% to 15% of all cervical spine injuries, and the rate is higher among elderly people. The anterior cannulated screw fixation has been widely used in odontoid process fracture, but the fixation strength may still be limited under some circumstances. This study aims to investigate the biomechanical fixation strength of expansive double-threaded bi-directional compression screw (EDBCS) compared with cannulated lag screw (CLS) and improved Herbert screw (IHS) for fixation of type II odontoid process fracture...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28422833/correction-of-sagittal-imbalance-in-treatment-for-adult-degenerative-scoliosis-with-thoracic-lordosis-and-lumbar-kyphosis-a-case-report
#15
Tao Wang, Hui Wang, Lei Ma, Di Zhang, Wen-Yuan Ding
RATIONALE: Lumbar degenerative scoliosis (LDS) is a common spinal disease for senior citizens. However, LDS accompanied with thoracic lordosis and lumbar kyphosis (LK) is rare in clinic. No reports have reported LDS with thoracic lordosis and LK. PATIENT CONCERNS: A 54-year-old woman just complained about sever back pain without any radiculopathy and neurodeficit of low limb for 2 years, Visual Analogue Scale (VAS) for back pain was 9 points and x-ray showed adult LDS with lordosis angle of 10° from 5th thoracic to 12th thoracic (T5-T12) and LK angle of 20°...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28420541/stability-of-lisfranc-injury-fixation-in-thiel-cadavers-is-routine-fixation-of-the-1st-and-3rd-tarsometatarsal-joint-necessary
#16
Alistair I W Mayne, Robert Lawton, Stephen Dalgleish, Fraser Harrold, George Chami
BACKGROUND: There is debate as to whether a home run screw (medial cuneiform to 2nd metatarsal base) combined with k-wire fixation of the 4th & 5th tarsometatarsal joints is sufficient to stabilise Lisfranc injuries or if fixation of the 1st and 3rd tarsometatarsal joints is also required. Unlike the 2nd, 4th and 5th tarsometatarsal joints, stabilisation of the 1st and 3rd requires either intra-articular screw or an extra-articular plate which risk causing chondrolysis and/or osteoarthritis...
April 11, 2017: Injury
https://www.readbyqxmd.com/read/28419811/augmentation-of-distal-biceps-repair-with-an-acellular-dermal-graft-restores-native-biomechanical-properties-in-a-tendon-deficient-model
#17
Christine Conroy, Paul Sethi, Craig Macken, David Wei, Marc Kowalsky, Raffy Mirzayan, Leo Pauzenberger, Felix Dyrna, Elifho Obopilwe, Augustus D Mazzocca
BACKGROUND: The majority of distal biceps tendon injuries can be repaired in a single procedure. In contrast, complete chronic tears with severe tendon substance deficiency and retraction often require tendon graft augmentation. In cases with extensive partial tears of the distal biceps, a human dermal allograft may be used as an alternative to restore tendon thickness and biomechanical integrity. HYPOTHESIS: Dermal graft augmentation will improve load to failure compared with nonaugmented repair in a tendon-deficient model...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28419162/symmetry-based-assembly-of-a-2-dimensional-protein-lattice
#18
Sandra Poulos, Sayeh Agah, Nikardi Jallah, Salem Faham
The design of proteins that self-assemble into higher order architectures is of great interest due to their potential application in nanotechnology. Specifically, the self-assembly of proteins into ordered lattices is of special interest to the field of structural biology. Here we designed a 2 dimensional (2D) protein lattice using a fusion of a tandem repeat of three TelSAM domains (TTT) to the Ferric uptake regulator (FUR) domain. We determined the structure of the designed (TTT-FUR) fusion protein to 2.3 Å by X-ray crystallographic methods...
2017: PloS One
https://www.readbyqxmd.com/read/28419031/prognostic-factors-affecting-union-after-ulnar-shortening-osteotomy-in-ulnar-impaction-syndrome-a-retrospective-case-control-study
#19
Soo Min Cha, Hyun Dae Shin, Ki Jun Ahn
BACKGROUND: Ulnar shortening osteotomy (USO) is a widely adopted procedure with excellent outcomes. However, delayed union or nonunion has occasionally been observed. The purpose of this retrospective case-control study was to identify variables affecting osseous consolidation after USO in patients with ulnar impaction syndrome. METHODS: The study included 325 patients who had undergone USO between March 2008 and March 2014. We evaluated the association between union and basic demographic factors as well as preoperative pain (assessed on a visual analog scale [VAS]), range of wrist motion, grip strength, and modified Mayo wrist score...
April 19, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28417681/proximal-femoral-nail-antirotation-versus-dynamic-hip-screw-fixation-for-treatment-of-osteoporotic-type-31-a1-intertrochanteric-femoral-fractures-in-elderly-patients
#20
Xianshang Zeng, Nan Zhang, Dan Zeng, Lili Zhang, Ping Xu, Lei Cao, Weiguang Yu, Ke Zhan, Xinchao Zhang
Objective To evaluate long-term radiographic and functional outcomes between dynamic hip screw (DHS) and proximal femoral nail antirotation (PFNA) fixation for treatment of osteoporotic type 31-A1 intertrochanteric femoral fractures (IFFs) among elderly patients Methods A retrospective comparative study was carried out. Follow-up was performed at 1, 3, 6, 9, and 12 months postoperatively and yearly thereafter. The primary outcome was the radiographic outcome, and the secondary outcome was the functional outcome...
January 1, 2017: Journal of International Medical Research
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