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https://www.readbyqxmd.com/read/27913653/dimensional-evaluation-of-patient-specific-3d-printing-using-calcium-phosphate-cement-for-craniofacial-bone-reconstruction
#1
Liciane Sabadin Bertol, Rodrigo Schabbach, Luís Alberto Loureiro Dos Santos
The 3D printing process is highlighted nowadays as a possibility to generate individual parts with complex geometries. Moreover, the development of 3D printing hardware, software and parameters permits the manufacture of parts that can be not only used as prototypes, but are also made from materials that are suitable for implantation. In this way, this study investigates the process involved in the production of patient-specific craniofacial implants using calcium phosphate cement, and its dimensional accuracy...
December 1, 2016: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/27912821/clinical-and-molecular-perspectives-of-reparative-dentin-formation-lessons-learned-from-pulp-capping-materials-and-the-emerging-roles-of-calcium
#2
REVIEW
Minju Song, Bo Yu, Sol Kim, Marc Hayashi, Colby Smith, Suhjin Sohn, Euiseong Kim, James Lim, Richard G Stevenson, Reuben H Kim
The long-term use of calcium hydroxide and the recent increase in the use of hydraulic calcium-silicate cements as direct pulp-capping materials provide important clues in terms of how reparative dentin may be induced to form a "biological seal" to protect the underlying pulp tissues. In this review article, we discuss clinical and molecular perspectives of reparative dentin formation based on evidence learned from the use of these pulp-capping materials. We also discuss the emerging role of calcium as an odontoinductive component in these pulp-capping materials...
January 2017: Dental Clinics of North America
https://www.readbyqxmd.com/read/27912753/radiographic-evaluation-of-early-periprosthetic-acetabular-bone-contrast-and-prosthetic-head-acetabular-coverage-after-uncemented-and-cemented-total-hip-prosthesis-in-dogs
#3
Ayman A Mostafa, Karin Lucas, Ingo Nolte, Patrick Wefstaedt
BACKGROUND: Coxofemoral osteoarthritis is a chronic, disabling condition affecting people and dogs, with THA providing an excellent return to function in severely affected joints. The principal role of THA is to restore an adequate range of motion to the hip joint while transferring load from the acetabulum in order to improve the survival of the implant and enhance the limb function in the short and long terms. The objectives of the study reported here were, therefore, to radiographically evaluate periprosthetic acetabular bone GV and to assess prosthetic head acetabular coverage after 4 months of uncemented and cemented THA in dogs...
December 3, 2016: BMC Veterinary Research
https://www.readbyqxmd.com/read/27909655/adjacent-disc-height-reduction-and-clinical-outcome-after-intradiscal-cement-leakage
#4
Minjie Shen, Junjie Niu, Haifei Zhou, Qian Meng, Minfeng Gan, Huilin Yang
OBJECTIVE: The purpose of this study is to evaluate the effect of intradiscal cement leakage on the height of adjacent cement-containing discs and the resulting clinical efficacy after kyphoplasty. METHODS: A total of 124 patients were included and classified into two groups: group A included 20 patients with intradiscal leakage, and group B contained 104 patients without intradiscal leakage. The mean follow-up time was 20.56±3.51 months. The height of the corresponding discs in both groups was measured using Farfan's method...
2016: International Journal of Spine Surgery
https://www.readbyqxmd.com/read/27909122/femoral-impaction-bone-grafting-in-revision-hip-arthroplasty-705-cases-from-the-originating-centre
#5
M J Wilson, S Hook, S L Whitehouse, A J Timperley, G A Gie
AIMS: Femoral impaction bone grafting was first developed in 1987 using morselised cancellous bone graft impacted into the femoral canal in combination with a cemented, tapered, polished stem. We describe the evolution of this technique and instrumentation since that time. PATIENTS AND METHODS: Between 1987 and 2005, 705 revision total hip arthroplasties (56 bilateral) were performed with femoral impaction grafting using a cemented femoral stem. All surviving patients were prospectively followed for a mean of 14...
December 2016: Bone & Joint Journal
https://www.readbyqxmd.com/read/27909119/impact-of-a-learning-curve-on-the-survivorship-of-4802-cementless-total-hip-arthroplasties
#6
P Magill, J Blaney, J C Hill, M P Bonnin, D E Beverland
AIMS: Our aim was to report survivorship data and lessons learned with the Corail/Pinnacle cementless total hip arthroplasty (THA) system. PATIENTS AND METHODS: Between August 2005 and March 2015, a total of 4802 primary cementless Corail/Pinnacle THAs were performed in 4309 patients. In March 2016, we reviewed these hips from a prospectively maintained database. RESULTS: A total of 80 hips (1.67%) have been revised which is equivalent to a cumulative risk of revision of 2...
December 2016: Bone & Joint Journal
https://www.readbyqxmd.com/read/27908277/comparison-of-unilateral-and-bilateral-percutaneous-vertebroplasty-for-osteoporotic-vertebral-compression-fractures-a-systematic-review-and-meta-analysis
#7
Haolin Sun, Chunde Li
BACKGROUND: The aim of this meta-analysis is to examine the safety and effectiveness of unilateral percutaneous vertebroplasty (PVP) for treatment of osteoporotic vertebral compression fractures (OVCFs) compared with that of bilateral treatment. METHODS: The multiple databases including PubMed, Springer, EMBASE, OVID, and China Journal Full-text Database were adopted to search for relevant studies in English or Chinese, and full-text articles involving comparison of unilateral and bilateral PVP surgery were reviewed...
December 1, 2016: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/27907043/thermodynamic-simulation-of-carbonate-cements-water-carbon-dioxide-equilibrium-in-sandstone-for-prediction-of-precipitation-dissolution-of-carbonate-cements
#8
Yiping Duan, Mingshi Feng, Xinyan Zhong, Ruishu Shang, Lihong Huang
Carbonate cements, such as calcite, dolomite, ferrocalcite and ankerite, play important roles in the formation of pores in sandstones: precipitation of carbonate cements modifies pores and inhibits compaction, while dissolution creates secondary pores. This work proposed a precipitation-dissolution model for carbonate cements-CO2-H2O system by means of ion equilibrium concentration ([M2+], M = Ca, Mg, Fe or Mn) with different factors, such as temperature, depth, pH, [Formula: see text], variable rock composition and overpressure...
2016: PloS One
https://www.readbyqxmd.com/read/27906947/a-longitudinal-cohort-investigation-of-the-development-of-symptomatic-adjacent-level-compression-fractures-following-balloon-assisted-kyphoplasty-in-a-series-of-726-patients
#9
Christopher P Deibert, Gurpreet S Gandhoke, Erin E Paschel, Peter C Gerszten
BACKGROUND: Balloon-assisted kyphoplasty (BAK) is a well-accepted treatment for symptomatic vertebral compression fractures (VCF) secondary to osteoporosis. Some have raised a concern of an increased incidence of adjacent fractures due to alterations in spine biomechanics after cement augmentation. The incidence of subsequent VCFs following BAK is poorly understood. The aim of this study was to investigate the timing, location, and incidence of new VCFs following BAK and to identify risk factors associated specifically with the occurrence of new adjacent level fractures...
November 2016: Pain Physician
https://www.readbyqxmd.com/read/27906934/can-unilateral-kyphoplasty-replace-bilateral-kyphoplasty-in-treatment-of-osteoporotic-vertebral-compression-fractures-a-systematic-review-and-meta-analysis
#10
Han Sun, Pei-Pei Lu, Yi-Jie Liu, Xu Yang, Ping-Hui Zhou, Xiao-Feng Shen, Si-Wei Sun, Huilin Yang
BACKGROUND: Kyphoplasty has been proven to be an efficient method to relieve patient suffering from osteoporotic vertebral compression fractures (OVCFs). Because of its technological superiority, unilateral kyphoplasty consumes less operative time and bone cement than traditional bilateral kyphoplasty. However, there is controversy about which method is most efficient in the treatment of OVCFs. Thus, an overall analysis should be performed to shed light on the facts corroborating both procedures...
November 2016: Pain Physician
https://www.readbyqxmd.com/read/27906446/study-on-adhesion-proliferation-and-differentiation-of-osteoblasts-promoted-by-new-absorbable-bioactive-glass-injection-in-vitro
#11
A Axrap, J Wang, Y Liu, M Wang, A Yusuf
OBJECTIVE: The objective of this study was to evaluate adhesion, proliferation and differentiation of osteoblasts grown on absorbable bioactive glass-calcium phosphate cement injection (BG-CPC) materials in vitro. MATERIALS AND METHODS: BG-CPC composite biomaterial samples were prepared in vitro, for culture with MC3T3-E1 rat osteoblasts. Cells were divided into CPC, BG and BG-CPC treated groups. After cultivation for 3d, cells were stained with rhodamine-phalloidin and 4',6-diamidino-2-phenylindole (DAPI) and observed by fluorescence microscopy for osteoblast morphology on the surface of biomaterials...
November 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27904933/-metastatic-disease-in-long-bones-review-of-surgical-treatment-options
#12
Franz Liska, Philipp Schmitz, Norbert Harrasser, Peter Prodinger, Hans Rechl, Rüdiger von Eisenhart-Rothe
Surgery in metastatic bone disease is currently the most frequent type of surgery in orthopedic oncology. Improved survival rates and an increasing incidence of bone metastasis have led to an increase in complications caused by metastatic disease, such as pathological fractures or hardware failure after operative treatment. Although surgery of metastatic lesions remains a palliative therapy concept, because of sufficient therapy for the primary carcinomas, tumor-specific-oriented follow-up protocols and a variation in the prognosis for the individual entities, an individually adapted treatment strategy is necessary...
November 30, 2016: Der Unfallchirurg
https://www.readbyqxmd.com/read/27904730/intramedullary-nailing-for-pathological-fractures-of-the-proximal-humerus
#13
Eun-Seok Choi, Ilkyu Han, Hwan Seong Cho, In Woong Park, Jong Woong Park, Han-Soo Kim
BACKGROUND: Endoprosthetic reconstruction is widely applied for pathological fractures of the proximal humerus; however, functional impairment is usually unsatisfactory. The aims of the current study are to evaluate the reliability of interlocking intramedullary (IM) nailing with cement augmentation as a fixation method in proximal humeral lesions and to assess functional outcomes. METHODS: We reviewed 32 patients with pathological fractures of the proximal humerus who underwent interlocking IM nailing and cement augmentation...
December 2016: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/27904221/what-have-we-learned-from-100-success-of-press-fit-condylar-rotating-platform-posterior-stabilized-knees-a-5-10-years-followup-by-a-nondesigner
#14
Shrinand V Vaidya, Siddharth Virani, Rajendra Phunde, Abhishek Mahajan
BACKGROUND: Total joint arthroplasties of the hip and knee represent a remarkable feat of modern medicine in terms of reducing pain and restoring function to millions of patients afflicted with severe arthritis. Oftentimes, the performance and longevity of new implants and devices are based on limited data. This is the first study by a non-designer on the press fit condylar rotating platform posterior stabilized (PFC-RP-PS) design with 100' success. This has a relevance, vis-á -vis bias that one may have in terms of reproducibility of technique and funding from the manufacturer...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27904212/functional-outcome-after-primary-hemiarthroplasty-in-three-or-four-part-proximal-humerus-fracture-a-short-term-followup
#15
Saurabh Agarwal, Ashish Rana, Rajeev K Sharma
BACKGROUND: Several modalities of treatment are being used for the management of proximal humerus fractures. Primary hemiarthroplasty in proximal humerus fracture is indicated in three or four part fracture or fracture dislocations. It is also indicated if fracture involves a large area of articular cartilage loss and viability of head is doubtful. We studied the functional outcome of hemiarthroplasty in comminuted proximal humerus fracture. MATERIALS AND METHODS: 29 patients of three or four part proximal humerus fractures, (according to Neer's classification) who underwent primary shoulder hemiarthroplasty were included in this retrospective study...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27900248/treatment-of-cystic-lesion-of-mandible-using-combination-of-modified-bone-granules-and-calcium-phosphate-bone-cement-a-preliminary-report
#16
Richik Tripathi, Fahad M Samadi, Sanjeev Kumar
AIMS: This study was conducted to evaluate healing of bony cavity in mandible following enucleation of cystic lesion by obliterating the cavity using modified natural bone granules (G Graft) and calcium phosphate bone cement (G Bone). MATERIALS AND METHOD: In this technique, after enucleation of cystic lesion, peripheral ostectomy using No. 702 fissure bur and perforation of the inferior cortex using 1.5 mm drill bits were performed. Modified hydroxyapatite granules were used to fill the defect while calcium hydroxide bone cement was used to seal the cavity opening...
November 2016: Journal of Oral Biology and Craniofacial Research
https://www.readbyqxmd.com/read/27900098/clinical-effects-of-three-surgical-approaches-for-a-giant-cell-tumor-of-the-distal-radius-and-ulna
#17
Jing Zhang, Yi Li, Dongqi Li, Junfeng Xia, Su Li, Shunling Yu, Yedan Liao, Xiaojuan Li, Huilin Li, Zuozhang Yang
The aim of the present study was to assess the curative effects of three surgical approaches for a giant cell tumor (GCT) of the distal radius and ulna. A total of 27 patients with GCT on distal radius and ulnas (7 and 20, respectively), confirmed by biopsy, were treated with individualized treatment regimens, according to the Campanacci's grade system: i) Curettage plus inactivated tumor bed and allogeneic bone graft/bone cement augmentation for Campanacci's grade I GCT of the distal radius and ulna (Group A); ii) simple en bloc resection for Campanacci's grade II and III GCT of the distal ulna (Group B); iii) en bloc resection and reconstruction with non-vascularized fibular autograft/allogeneic bone graft for Campanacci's II and III GCT of the distal radius (Group C)...
November 2016: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/27895899/oxidatively-degradable-poly-thioketal-urethane-ceramic-composite-bone-cements-with-bone-like-strength
#18
Madison A P McEnery, Sichang Lu, Mukesh K Gupta, Katarzyna J Zienkiewicz, Joseph C Wenke, Kerem N Kalpakci, Daniel Shimko, Craig L Duvall, Scott A Guelcher
Synthetic bone cements are commonly used in orthopaedic procedures to aid in bone regeneration following trauma or disease. Polymeric cements like PMMA provide the mechanical strength necessary for orthopaedic applications, but they are not resorbable and do not integrate with host bone. Ceramic cements have a chemical composition similar to that of bone, but their brittle mechanical properties limit their use in weight-bearing applications. In this study, we designed oxidatively degradable, polymeric bone cements with mechanical properties suitable for bone tissue engineering applications...
2016: RSC Advances
https://www.readbyqxmd.com/read/27895345/a-review-of-the-failed-cases-of-dental-implants-at-a-university-hospital-in-karachi-pakistan
#19
Farhan Raza Khan, Rabia Ali, Sana Ehsan Nagi
The retrospective study was conducted to assess the dental implants that experienced failure. It was conducted at the dental clinic of the Aga Khan University Hospital, Karachi, and comprised record of dental implants from July 2010 to June 2015. Variables such as patient age, gender and systemic status, length and diameter of implants, bone grafting, type of definitive prosthesis (crown or bridge or overdenture), nature of retention (cement versus screw retained), loading strategy (immediate versus delayed loading), etc...
October 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27895098/brain-aluminium-accumulation-and-oxidative-stress-in-the-presence-of-calcium-silicate-dental-cements
#20
K Demirkaya, B Can Demirdöğen, Z Öncel Torun, O Erdem, E Çırak, Y M Tunca
Mineral trioxide aggregate (MTA) is a calcium silicate dental cement used for various applications in dentistry. This study was undertaken to test whether the presence of three commercial brands of calcium silicate dental cements in the dental extraction socket of rats would affect the brain aluminium (Al) levels and oxidative stress parameters. Right upper incisor was extracted and polyethylene tubes filled with MTA Angelus, MTA Fillapex or Theracal LC, or left empty for the control group, were inserted into the extraction socket...
November 27, 2016: Human & Experimental Toxicology
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