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https://www.readbyqxmd.com/read/29454279/bonding-of-composite-cements-to-zirconia-a-systematic-review-and-meta-analysis-of-in-vitro-studies
#1
REVIEW
Putsadeeporn Thammajaruk, Masanao Inokoshi, Shanley Chong, Massimiliano Guazzato
OBJECTIVES: The aim of this study was to systematically review the literature and statistically analyze bond strength data to identify the influence that composite cements, type of test methodology, chemical and mechanical pre-treatments have on the bond strength of composite cements to zirconia in three different artificial aging conditions. METHODS: The literature was electronically searched in MEDLINE, PUBMED, EMBASE, and SCOPUS to select relevant articles that evaluated the bond strength between zirconia and composite cements...
February 8, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29454245/associations-of-household-renovation-materials-and-periods-with-childhood-asthma-in-china-a-retrospective-cohort-study
#2
Jialing Zhang, Chanjuan Sun, Wei Liu, Zhijun Zou, Yinping Zhang, Baizhan Li, Zhuohui Zhao, Qihong Deng, Xu Yang, Xin Zhang, Hua Qian, Yuexia Sun, Jan Sundell, Chen Huang
BACKGROUND: Childhood asthma is prevalent in China. However, there is a lack of evidence on whether household renovation, including the materials used and the periods, are associated with the disease. OBJECTIVES: To investigate the associations between household decoration materials and renovation periods, and childhood asthma and its related symptoms. METHODS: During 2010-2012, a retrospective cohort study was initiated in seven cities of China, and 40,010 children, aged 3-6 years, were recruited...
February 14, 2018: Environment International
https://www.readbyqxmd.com/read/29454122/rope-jumping-induced-traumatic-compression-fractures-the-underestimated-danger-of-repetitive-axial-load-forces
#3
Tobias A Mattei
The author describes a case of a non-osteoporotic adult presenting with multilevel compression fractures at the apex of the thoracic kyphosis after strenuous rope jumping. MRI demonstrated diffuse bone marrow changes in the vertebral bodies with only a very small unilateral endplate fracture. Besides highlighting the oftentimes neglected role of repetitive sub-pathological axial load forces in traumatic spinal injuries, the observed imaging pattern substantiates previous experimental studies which demonstrated that under cyclic axial loading the initial damage occurs in the cancellous regions of the bone (with observation of microscopic/50-100 μM long cracks), ultimately leading to a reduction in its elastic modulus...
February 14, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29453026/assessment-of-titanium-metallization-thin-film-deposited-on-alumina-substrate-microstructure-and-nano-indentation
#4
Xuegang Xing, Hefeng Wang, Gesheng Xiao, Shangyu Yang, Xuefeng Shu
Surface titanium (Ti) metallization was conducted on alumina (Al 2 O 3 ) through chemical vapor deposition (CVD) method derived from non-contact pack cementation. The effects of different deposition temperature (1000 °C, 1050 °C, and 1100 °C) were examined in this scenario. The morphology, phase composition, and interfacial defects of the resulting films were systematically investigated through scanning electron microscopy, energy dispersive spectrometry, and X-ray diffraction. The nanomechanical characterization of the proposed thin films was evaluated by conducting nano-indentation tests at different depths...
February 1, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29453009/advances-in-concrete-materials-for-sewer-systems-affected-by-microbial-induced-concrete-corrosion-a-review
#5
REVIEW
Cyrill Grengg, Florian Mittermayr, Neven Ukrainczyk, Günther Koraimann, Sabine Kienesberger, Martin Dietzel
Microbial induced concrete corrosion (MICC) is recognized as one of the main degradation mechanisms of subsurface infrastructure worldwide, raising the demand for sustainable construction materials in corrosive environments. This review aims to summarize the key research progress acquired during the last decade regarding the understanding of MICC reaction mechanisms and the development of durable materials from an interdisciplinary perspective. Special focus was laid on aspects governing concrete - micoorganisms interaction since being the central process steering biogenic acid corrosion...
February 6, 2018: Water Research
https://www.readbyqxmd.com/read/29451939/reverse-shoulder-arthroplasty-in-the-weight-bearing-versus-non-weight-bearing-shoulder-mid-term-outcomes-with-minimum-5-year-follow-up
#6
Derek J Cuff, Brandon G Santoni
This retrospective review evaluated the mid-term outcomes of cemented reverse shoulder arthroplasty in patients who use the shoulder for weight bearing (WB) vs non-weight-bearing (NWB) patients. Twenty-five shoulders of 21 patients who used their upper extremity for WB (WB group) were treated with cemented reverse shoulder arthroplasty and followed for a minimum of 5 years postoperatively (average, 73 months). Seventy-five consecutive shoulders of 72 patients who were NWB (NWB group) were treated and matched for duration of follow-up (average, 72 months) to serve as a control group...
February 16, 2018: Orthopedics
https://www.readbyqxmd.com/read/29451931/nonsurgical-management-of-peri-implant-bone-loss-induced-by-residual-cement-retrospective-analysis-of-six-cases
#7
Emanuele De Martinis Terra, Marco Berardini, Paolo Trisi
This report presents six consecutive cases of peri-implantitis associated with residual methacrylate cement. The cases responded to cement removal and disinfection procedures. Six patients, each presenting one methacrylate cement-retained implant restoration and showing peri-implant inflammation and bone loss, were treated. All the cases were negative for bleeding on probing after 6 weeks, and this was maintained at 1 year of follow-up from nonsurgical therapy and crown refixation with alternative and resorbable cement...
February 16, 2018: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29451649/the-effects-of-different-restorative-materials-on-periodontopathogens-in-combined-restorative-periodontal-treatment
#8
Sila Çagri Isler, Gonen Ozcan, Gülcin Akca, Zahide Kocabas
Objective The aim of the study was to evaluate the association between subgingival restorations and the target periodontopathogenic bacteria (Pg, Td and Pi) in subgingival biofilm during one year after combined restorative-periodontal treatment. Material and Methods Seventeen systemically healthy subjects, who were positive for the presence of three cervical lesions associated with gingival recessions in three different adjacent teeth, were included in the study. A total of 51 combined defects were treated with connective tissue graft plus a nanofilled composite resin (NCR+CTG), a resin-modified glass ionemer cement (RMGI+CTG) and a fluoride-releasing resin material with pre-reacted glass (PRG), called giomer (Giomer+CTG)...
2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29448880/migration-and-clinical-outcome-of-mobile-bearing-versus-fixed-bearing-single-radius-total-knee-arthroplasty
#9
Koen T Van Hamersveld, Perla J Marang-Van De Mheen, Huub J L Van Der Heide, Henrica M J Van Der Linden-Van Der Zwaag, Edward R Valstar, Rob G H H Nelissen
Background and purpose - Mobile-bearing total knee prostheses (TKPs) were developed in the 1970s in an attempt to increase function and improve implant longevity. However, modern fixed-bearing designs like the single-radius TKP may provide similar advantages. We compared tibial component migration measured with radiostereometric analysis (RSA) and clinical outcome of otherwise similarly designed cemented fixed-bearing and mobile-bearing single-radius TKPs. Patients and methods - RSA measurements and clinical scores were assessed in 46 randomized patients at baseline, 6 months, 1 year, and annually thereafter up to 6 years postoperatively...
February 16, 2018: Acta Orthopaedica
https://www.readbyqxmd.com/read/29448759/multi-c-bn-coatings-by-r-f-diode-sputtering-and-investigation-of-wear-behavior
#10
Sung-Tae Park, Jeon-Geon Han, M Keunecke
Cubic boron nitride (c-BN) films on tool substrates are tendency to delaminate. Therefore, many research groups have studied improvement of c-BN synthesis method and deposition processes due to many potential applications. In this paper, we show that the adhesion property of c-BN layer system can be improved by deposing multi c-BN layers. The multi c-BN layers were deposited by r.f (13.56 MHz) diode sputtering apparatus on cemented carbide tool substrates with a TiAlN adhesion layer. For industrial applications, we performed turning and milling experiments under dry and high speed cutting conditions...
March 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29448144/nanocements-produced-from-mesoporous-bioactive-glass-nanoparticles
#11
Min Sil Kang, Na-Hyun Lee, Rajendra K Singh, Nandin Mandakhbayar, Roman A Perez, Jung-Hwan Lee, Hae-Won Kim
Biomedical cements are considered promising injectable materials for bone repair and regeneration. Calcium phosphate composition sized with tens of micrometers is currently one of the major powder forms. Here we report a unique cement form made from mesoporous bioactive glass nanoparticles (BGn). The nanopowder could harden in reaction with aqueous solution at powder-to-liquid ratios as low as 0.4-0.5 (vs. 2.0-3.0 for conventional calcium phosphate cement CPC). The cementation mechanism investigated from TEM, XRD, FT-IR, XPS, and NMR analyses was demonstrated to be the ionic (Si and Ca) dissolution and then reprecipitation to form Si-Ca-(P) based amorphous nano-islands that could network the particles...
February 3, 2018: Biomaterials
https://www.readbyqxmd.com/read/29447310/retrospective-evaluation-of-factors-related-to-the-outcomes-of-regenerative-therapy-for-implants-affected-by-peri-implantitis
#12
Stuart J Froum, Paul S Rosen, Wendy Cw Wang, Scott H Froum, Shalin Vinayak
The aim of this retrospective study was to examine the histories of 100 patients with 170 implants that were consecutively treated and reported in a previous study to identify which patient and implant factors might have affected the outcomes of therapy. Patient factors included history of periodontitis, hypertension, cardiac problems, rheumatoid arthritis, smoking, and penicillin allergy. Implant factors included whether the prosthesis was cemented or screw retained and initial bone loss (≤ 50% or > 50% of implant length)...
March 2018: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29446542/novel-calcitonin-gene-related-peptide-chitosan-strontium-calcium-phosphate-cement-enhanced-proliferation-of-human-umbilical-vein-endothelial-cells-in-vitro
#13
Tiancheng Lv, Wei Liang, Li Li, Xu Cui, Xiaomou Wei, Haobo Pan, Bing Li
Bone cement materials have some disadvantages, including slow degradation and no biological activity, which greatly weakens their clinical application. Therefore, the search for a multifunctional bioactive bone cement has become urgent. In this study, a novel bone cement sample of calcitonin gene-related peptide (CGRP)/chitosan-strontium (Sr)-calcium phosphate cement (CPC) was developed. The structure and morphology were observed by scanning electron microscope (SEM). The cytotoxicity and proliferation of CGRP/chitosan-Sr-CPC were also measured...
February 15, 2018: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29445960/is-percutaneous-kyphoplasty-the-better-choice-for-minimally-invasive-treatment-of-neurologically-intact-osteoporotic-k%C3%A3-mmell-s-disease-a-comparison-of-two-minimally-invasive-procedures
#14
JiaNan Zhang, Yong Fan, Xin He, YiBin Meng, YunFei Huang, ShuaiJun Jia, JinPeng Du, QiNing Wu, DingJun Hao
PURPOSE: The purpose of this study was to compare and evaluate the safety and efficacy of percutaneous vertebroplasty at a hyperextension position (PVPHP) and percutaneous kyphoplasty at a hyperextension position (PKPHP) for the treatment of osteoporotic Kümmell's disease. METHODS: This study was a retrospective, single-centre study. There were 35 patients with osteoporotic Kümmell's disease who were analyzed. Twenty-two of them underwent PVPHP and the other 13 patients underwent PKPHP from January 2013 to January 2015...
February 14, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29444963/parapedicular-vertebral-augmentation-with-polymethylmetacrylate-for-pedicle-screw-loosening
#15
Olivier Clerk-Lamalice, Zubin Irani, Marion Growney, Douglas P Beall, Joshua A Hirsch
A 71-year-old man who had a L1/S1 posterior fusion revision surgery complained of increasing back pain 5 weeks after the open surgical procedure. The pain was initially estimated at 9/10 on the visual analog scale (VAS) and thought to be related to a right-sided L2 screw loosening. A right parapedicular vertebroplasty was performed and polymethylmethacrylate cement was instilled around the right pedicle screw, filling the anterior two-thirds of the vertebral body. On postvertebroplasty day 1, the patient had significant improvement in his low back pain...
February 14, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29443957/bone-cement-augmented-short-segment-pedicle-screw-fixation-for-k%C3%A3-mmell-disease-with-spinal-canal-stenosis
#16
Yan-Sheng Huang, Chao-Yuan Ge, Hang Feng, Hai-Ping Zhang, Xing-Bang Niu, Shao-Yan Shi, Zi-Qi Zhu, Ding-Jun Hao
BACKGROUND This study aimed to explore the feasibility and efficacy of bone cement-augmented short-segmental pedicle screw fixation in treating Kümmell disease. MATERIAL AND METHODS From June 2012 to June 2015, 18 patients with Kümmell disease with spinal canal stenosis were enrolled in this study. Each patient was treated with bone cement-augmented short-segment fixation and posterolateral bone grafting, and posterior decompression was performed when needed. All patients were followed up for 12-36 months...
February 14, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29442091/influence-of-light-transmission-through-fiber-posts-quantitative-analysis-microhardness-and-on-bond-strength-of-a-resin-cement
#17
Luís Fernando Dos Santos Alves Morgan, Marcos Barbosa Pinotti, Fernanda Morais Ferreira, Giovana Mongruel Gomes, Guilherme Costa Silva, Rodrigo De Castro Albuquerque, Allyson Nogueira Moreira
Context: Light transmission (LT) into deeper areas of the dentin root is limited. Aim: The aim of this study is to perform a quantitative investigation of the radial transmission of light (LT) through different fiber posts and its influence on the Knoop hardness number (KHN) and bond strength (BS) of a dual-cure self-adhesive resin cement at 3 different depths. Materials and Methods: Four types of fiber posts (2 translucent and 2 conventional) were used...
January 2018: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/29439431/experimental-investigation-of-multi-mode-fiber-laser-cutting-of-cement-mortar
#18
Dongkyoung Lee, Sukhoon Pyo
This study successfully applied multi-mode laser cutting with the variation of the laser cutting speed to cement mortar for the first time. The effects of the amount of silica sand in the cement mortar on laser cutting are tested and analyzed. The kerf width and penetration depth of the specimens after laser cutting are investigated. As the laser cutting speed increases, the penetration depth decreases for both cement paste and cement mortar, whereas the kerf width becomes saturated and increases, respectively, for cement paste and cement mortar...
February 10, 2018: Materials
https://www.readbyqxmd.com/read/29437516/ideal-versus-late-secondary-alveolar-bone-graft-surgery-a-bone-thickness-cone-beam-computed-tomographic-assessment
#19
Michele Alves Garcia, Marilia Yatabe, Thais Ustulin Fuzer, Adriana Maria Calvo, Ivy Kiemle Trindade-Suedam
OBJECTIVE: To compare the bone morphology after secondary alveolar bone graft surgery (SABG) performed before and after permanent canine eruption. DESIGN: Cross-sectional study. SETTING: Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, SP, Brazil. PATIENTS: 25 cone-beam computed tomography (CBCT) scans of complete unilateral cleft lip and palate (CLP) individuals who underwent SABG before or after eruption of the permanent canine taken 2 and 6 months (T1 and T2) after SAGB, resulting in 50 CBCT scans...
March 2018: Cleft Palate-craniofacial Journal
https://www.readbyqxmd.com/read/29437070/outcomes-after-extensive-manual-curettage-and-limited-burring-for-atypical-cartilaginous-tumour-of-long-bone
#20
W Kim, J S Lee, H W Chung
AIMS: Adjuvant treatment after intralesional curettage for atypical cartilaginous tumours (ACTs) of long bones is widely accepted for extending surgical margins. However, evaluating the isolated effect of adjuvant treatment is difficult, and it is unclear whether not using such adjuvants provides poor oncological outcomes. Hence, we analyzed whether intralesional curettage without cryosurgery or chemical adjuvants provides poor oncological outcomes in patients with an ACT. PATIENTS AND METHODS: A total of 24 patients (nine men, 15 women) (mean age 45 years; 18 to 62) were treated for ACTs of long bones and followed up for a median of 66 months (interquartile range 50 to 84)...
February 2018: Bone & Joint Journal
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