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https://www.readbyqxmd.com/read/29331590/setting-mechanism-of-a-new-injectable-dicalcium-phosphate-dihydrate-dcpd-forming-cement
#1
Weiping Ren, Wei Song, Sally Yurgelevic, David C Markel
We previously described the gelation mechanism of calcium polyphosphate (CPP) in the presence of water. In this study, we developed novel and injectable poly-dicalcium phosphate dihydrate (P-DCPD) forming cement by the reaction of acidic CPP gel with alkali tetracalcium phosphate (TTCP). The setting reaction mechanism of P-DCPD is due to the intermolecular interaction between CPP gel and TTCP that was supported by XRD, AFM, Raman spectra analysis and SEM. The setting mechanism of P-DCPD is completely different from the classical calcium phosphate cement (CPC) that achieves crystallization by monophosphates reaction...
January 4, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29330869/three-year-analysis-of-zirconia-implants-used-for-single-tooth-replacement-and-three-unit-fixed-dental-prostheses-a-prospective-multicenter-study
#2
Marc Balmer, Benedikt C Spies, Kirstin Vach, Ralf-Joachim Kohal, Christoph H F Hämmerle, Ronald E Jung
AIM: The aim of the present investigation was to evaluate clinically and radiographically the outcome of zirconia oral implants after 3 years in function. MATERIALS AND METHODS: In 60 patients in need of either a single-tooth replacement or a three-unit fixed dental prosthesis (FDP), a total of 71 one-piece zirconia implants were placed and immediately restored with temporary fixed prostheses. After a period of at least 2 months in the mandible and at least 4 months in the maxilla, zirconia-based reconstructions were cemented...
January 12, 2018: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29330841/delayed-replantation-of-an-avulsed-immature-permanent-incisor-and-apexification-using-a-novel-fast-setting-calcium-silicate-cement-containing-fluoride-a-3-year-follow-up-case-report
#3
A Vafaei, B Ranjkesh, L Erfanparast, H Løvschall
BACKGROUND: Traumatic tooth avulsion requires an urgent intervention to replant the tooth. Prolonged post-injury dry extra-oral conditions worsen the prognosis and increase the risk of root resorption. Fluoride has the potential to delay replacement resorption. Calcium silicate cements (CSC) are used to seal the root canal system and to stimulate periapical regeneration in immature open apex teeth (apexification). This report suggests the application of a novel fast-setting CSC with fluoride for apexification in an attempt to hinder root resorption...
January 12, 2018: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/29325524/posterior-decompression-and-occipitocervical-fixation-followed-by-intraoperative-vertebroplasty-for-metastatic-involvement-of-the-axis
#4
Xinjie Wu, Mingsheng Tan, Yingna Qi, Ping Yi, Feng Yang, Xiangsheng Tang, Qingying Hao
BACKGROUND: Metastases to the upper cervical spine were rarely reported in the literature. However, metastases to this area may cause spinal instability and cord compression, which in turn can result in respiratory failure and neurological dysfunction. The present study investigated the efficacy and safety of posterior decompression and occipitocervical fixation followed by intraoperative vertebroplasty for this disease. METHODS: This was a retrospective study that included 10 patients with metastatic involvement of the axis from March 2002 to May 2014...
January 11, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29322970/minimally-invasive-transforaminal-lumbar-interbody-fusion-using-bone-cement-augmented-pedicle-screws-for-lumbar-spondylolisthesis-in-patients-with-osteoporosis-case-series-and-review-of-literature
#5
Venkata Ramesh Chandra Vemula, Bodapati Chandramowliswara Prasad, M A Jagadeesh, Jayachandar Vuttarkar, Sanjeev Kumar Akula
BACKGROUND: Instrumentation in patients with osteoporosis is challenging. Bone cement-augmented fenestrated pedicle screw fixation is a new procedure for fixation in the osteoporotic bone; and, applying minimally invasive techniques to the above is a challenging and novel concept. AIMS: To evaluate the clinical and radiological outcome of minimally invasive spine surgery transforaminal lumbar interbody fusion (MIS-TLIF) in patients with spondylolisthesis and poor bone quality, performed with rigid instrumentation using bone cement [poly(methylmethacrylate)]-augmented fenestrated pedicle screws...
January 2018: Neurology India
https://www.readbyqxmd.com/read/29322260/minimally-invasive-opening-wedge-tibia-outpatient-osteotomy-using-screw-to-plate-locking-technique-and-a-calcium-phosphate-cement
#6
Claude Schwartz
Medial knee osteoarthritis on angular varus deformity of a lower limb is very common. Open-wedge high tibial osteotomy is a treatment of choice if cartilage is not excessively worn (Allback 1 or 2). The technique based on a plate fixation and the bone defect filled with calcium phosphate cement is thoroughly described. Data at 1, 3, 6 months and 1 year of a 19 cases continuous and prospective series are collected and analysed. Mean age at the time of operation was 55 years. The average preoperative varus deformity was 5° and corrected to an average postoperative valgus of 4° (range 3°-6°)...
January 10, 2018: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/29316208/effect-of-bone-sialoprotein-coated-three-dimensional-printed-calcium-phosphate-scaffolds-on-primary-human-osteoblasts
#7
Anja Klein, Andreas Baranowski, Ulrike Ritz, Hermann Götz, Sascha Heinemann, Stefan Mattyasovszky, Pol M Rommens, Alexander Hofmann
The combination of the two techniques of rapid prototyping 3D-plotting and bioactive surface functionalization is presented, with emphasis on the in vitro effect of Bone Sialoprotein (BSP) on primary human osteoblasts (hOBs). Our primary objective was to demonstrate the BSP influence on the expression of distinctive osteoblast markers in hOBs. Secondary objectives included examinations of the scaffolds' surface and the stability of BSP-coating as well as investigations of cell viability and proliferation. 3D-plotted calcium phosphate cement (CPC) scaffolds were coated with BSP via physisorption...
January 9, 2018: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29315595/mid-to-long-term-clinical-outcome-of-giant-cell-tumor-of-bone-treated-with-calcium-phosphate-cement-following-thorough-curettage-and-phenolization
#8
Akihiko Takeuchi, Prakrit Suwanpramote, Norio Yamamoto, Toshiharu Shirai, Katsuhiro Hayashi, Hiroaki Kimura, Shinji Miwa, Takashi Higuchi, Kensaku Abe, Hiroyuki Tsuchiya
BACKGROUND AND OBJECTIVES: Giant cell tumors of bone (GCTB) are intermediate and locally aggressive bone tumor. Calcium phosphate cement (CPC) is a bone void filler used in orthopaedic surgery. This study investigated the clinical outcome of GCTB treated with thorough curettage, phenolization, and CPC. METHODS: We investigated 26 patients with at least 36 months of follow-up. The mean age and follow-up were 37 years (range: 19-63) and 87 months (range: 38-169), respectively...
January 8, 2018: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29312854/antibiotic-bone-cement-s-effect-on-infection-rates-in-primary-and-revision-total-knee-arthroplasties
#9
Donald Kleppel, Jacob Stirton, Jiayong Liu, Nabil A Ebraheim
AIM: To compare infection rates in primary and revision total knee arthroplasty (TKA) procedures using antibiotic impregnated bone cement (AIBC) to those rates in procedures not using AIBC. METHODS: A systematic review and meta-analysis was conducted in search for randomized controlled trials/studies (RCTs) pertaining to the field of antibiotic AIBC vs non-AIBC groups in both primary and revision TKA procedures. The primary literature search performed was to identify all RCTs that assessed AIBC in primary and revision TKA procedures...
December 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/29310386/comparison-the-clinical-outcomes-and-complications-of-high-viscosity-versus-low-viscosity-in-osteoporotic-vertebral-compression-fractures
#10
Zhao Guo, Wei Wang, Wen-Shan Gao, Fei Gao, Hui Wang, Wen-Yuan Ding
To compare the clinical outcomes and complications of high viscosity and low viscosity bone cement percutaneous vertebroplasty (PVP) for osteoporotic vertebral compression fractures (OVCF).From September 2009 to September 2015, 100 patients with OVCF were randomly divided into 2 groups: group H, using high viscosity cement (n = 50) or group L, using low viscosity cement (n = 50). The clinical outcomes were assessed by the visual analog scale (VAS), Oswestry Disability Index (ODI), kyphosis Cobb angle, vertebral height, and complications...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29309925/the-quantity-of-bone-cement-influences-the-anchorage-of-augmented-pedicle-screws-in-the-osteoporotic-spine-a-biomechanical-human-cadaveric-study
#11
Miguel Pishnamaz, Henning Lange, Christian Herren, Hong-Sik Na, Philipp Lichte, Frank Hildebrand, Hans-Christoph Pape, Philipp Kobbe
BACKGROUND: The aim of this comparative biomechanical human cadaveric study was to investigate the anchorage of augmented screws with two different volumes of bone cement. For this purpose the effect of cranio-caudal loadings on pedicle screws was evaluated and axial pullout tests were performed. METHODS: A total of 50 pedicle screws (25 augmented/25 non-augmented) were instrumented into osteoporotic vertebra of fresh human cadavers. The augmented screws were grounded by two different volumes of bone cement (1...
December 29, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29309463/transformation-of-benign-giant-cell-tumor-of-bone-into-epithelioid-angiosarcoma
#12
Carmen E Quatman, John H Alexander, Paul E Wakely, Joel L Mayerson
In this article, we report a case of transformation of a benign giant cell tumor (GCT) of the calcaneus into an epithelioid angiosarcoma. The patient presented to our service in 2003 and was followed until 2014. Transformation occurred 11 years after curettage, cryotherapy, cementation, and a well-documented disease-free interval. Longitudinal radiographs, magnetic resonance imaging, and histopathology were evaluated by the same medical team. There are only a few case reports and case series of malignancy associated with GCT of bone...
November 2017: American Journal of Orthopedics
https://www.readbyqxmd.com/read/29309041/first-application-of-segmental-trabecular-metal-cones-in-a-custom-made-revision-tumor-prosthesis-of-the-knee-a-technical-note
#13
Roslind Karolina Hackenberg, Jochen Nessler, Dietmar Pierre König
BACKGROUND: Tumor prostheses are established as a standard procedure in tumors of the lower extremities. Septic and aseptic loosening remains the main reason for the failure of tumor prostheses. Due to bone defects, the possibilities of anchoring revision prostheses are limited. Trabecular metal cones are established in prosthetic revision surgery. However, the use of segmental trabecular metal cones in a custom-made tumor revision prosthesis has not yet been described. OBJECTIVE: A 58-year-old patient, who initially received a resection of the distal femur and reconstruction with a tumor prosthesis due to chondrosarcoma, attended our clinic...
December 29, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29307744/combined-autograft-and-bone-cement-for-painful-chondroblastoma-a-case-report
#14
Jae Jung Ryu, Wanlim Kim, Jong Seok Lee, You Keun Kim, Ho Seong Lee, Sang Gyo Seo
Chondroblastomas of the talus can lead to joint collapse and are often treated using curettage and bone grafting. In the present report, we describe the case of a 19-year-old female with a large chondroblastoma of the talus associated with a secondary aneurysmal cyst. We treated the large cartilage lesion, which involved most of the talus, with an iliac bone graft combined with bone cement to fill the large bone defect and preserve the subchondral bone of the articular surface of the dome of the talus.
January 4, 2018: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29307672/long-term-humeral-complications-after-grammont-style-reverse-shoulder-arthroplasty
#15
Francesco Ascione, Peter Domos, Vincenzo Guarrella, Mikaël Chelli, Pascal Boileau, Gilles Walch
BACKGROUND: Recent experiences with Grammont reverse shoulder arthroplasty (RSA) have revealed some problems related to the biomechanical changes of the shoulder and humeral stem complications. We analyzed humeral complications in a long-term follow-up of a large series of RSAs, searching for correlations between these and the initial etiology, the follow-up duration, and the clinical outcomes. MATERIALS AND METHODS: Preoperative and postoperative clinical and radiologic assessments of 1035 RSAs with a minimum 5-year follow-up (implanted in 7 specialized shoulder centers between 1993 and 2010) were retrospectively collected...
January 4, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29306530/evaluation-of-biocompatibility-and-osteogenic-potential-of-tricalcium-silicate-based-cements-using-human-bone-marrow-derived-mesenchymal-stem-cells
#16
Neha Sultana, Manisha Singh, Ruchika Roongta Nawal, Sarika Chaudhry, Seema Yadav, Sujata Mohanty, Sangeeta Talwar
INTRODUCTION: The success of endodontic regeneration lies in the appropriate combination of stem cells and bioactive materials. Several novel dental materials are available on the market in this regard. Hence, the current study aimed to evaluate the proliferation, differentiation, and osteogenic potential of human bone marrow-derived mesenchymal stem cells (hBMSCs) onto biomaterials like ProRoot MTA (MTA; Dentsply Tulsa Dental, Tulsa, OK), Biodentine (BD; Septodont, Saint Maur de Fosses, France), and EndoSequence Root Repair Material (ERRM; Brasseler USA, Savannah, GA)...
January 3, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29305098/is-clavicular-reconstruction-imperative-for-total-and-subtotal-claviculectomy-a-systematic-review
#17
REVIEW
Yu Chen, Xiuchun Yu, Weimin Huang, Bing Wang
BACKGROUND: The effects of clavicular reconstruction on total and subtotal claviculectomy are controversial. The aim of this study is to disclose the impact of clavicular reconstruction on the efficacy of this rare surgical procedure. METHODS: This is a systematic review of multiple medical databases for level I through IV evidence. RESULTS: Eleven studies (level IV) with a mean follow-up duration of 53 months (range, 12-156 months) met the inclusion criteria...
January 2, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29303816/short-implants-versus-standard-implants-midterm-outcomes-of-a-clinical-study
#18
M Emre Benlidayi, Yurdanur Ucar, Ufuk Tatli, Orhun Ekren, Burcu Evlice, Halil Ibrahim Kisa, Uygar Baksi
INTRODUCTION: The aim of this study was to evaluate the midterm survival rate, marginal bone resorption (MBR), and stability of short implants and to compare the results with standard length implants. MATERIALS AND METHODS: A total of 38 patients were included. In total, 147 implants (Nucleoss Implants, Izmir, Turkey) were placed (86 short implants and 61 standard implants). Cement-retained metal-ceramic prostheses were fabricated. MBR was evaluated on periapical radiographs taken at implant placement, at the time of crown insertion and annually thereafter...
January 4, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29299472/does-a-simple-syringe-applicator-enhance-bone-cement-set-up-time-in-knee-arthroplasty
#19
Nipun Sodhi, Sarah E Dalton, Anton Khlopas, Assem A Sultan, Gannon L Curtis, Matthew A Harb, Qais Naziri, Jared M Newman, John W Barrington, Michael A Mont
Background: The time required for polymethylmethacrylate (PMMA) cement curing or hardening can be modified by a number of variables including the mixing technique, and the temperature and pressure at which the process is taking place. Therefore, the purpose of this study was to evaluate two different methods of PMMA application in terms of set up time. Specifically, we (I) compared the PMMA set up time of cement that remained in the mixing bowl to cement that was placed in a syringe and (II) extrapolated the associated annual cost difference on the national and individual surgeon levels...
December 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/29297548/repair-of-bone-defects-with-chitosan-collagen-biomembrane-and-scaffold-containing-calcium-aluminate-cement
#20
Paola Castro de Moraes, Isabela Cristina de Souza Marques, Fernanda Gonçalves Basso, Hebert Luis Rossetto, Fernanda de Carvalho Panzeri Pires-de-Souza, Carlos Alberto de Souza Costa, Lucas da Fonseca Roberti Garcia
Innovative biomaterials can provide a promising new direction for the treatment of bone defects, stimulating a proper repair process, with no damage to adjacent tissues. The purpose of this in vivo study was to evaluate the biocompatibility and the osteoinductive capacity of chitosan-collagen biomembrane and scaffold containing calcium aluminate cement. Eighteen New Zealand white rabbits (Oryctolagus cuniculus) were distributed according to the experimental times of analysis (7, 15 and 30 days). Four bone defects were created in the rabbits calvaria, which were individually filled with the biomembrane, scaffold, blood clot (negative control) and autologous bone (positive control)...
May 2017: Brazilian Dental Journal
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