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https://www.readbyqxmd.com/read/29782695/dual-ag-zno-decorated-micro-nanoporous-sulfonated-polyetheretherketone-with-superior-antibacterial-capability-and-biocompatibility-via-layer-by-layer-self-assembly-strategy
#1
Yi Deng, Lei Yang, Xiaobing Huang, Junhong Chen, Xiuyuan Shi, Weizhong Yang, Min Hong, Yuan Wang, Matthew S Dargusch, Zhi-Gang Chen
Polyetheretherketone is attractive for dental and orthopedic applications due to its mechanical attributes close to that of human bone; however, the lack of antibacterial capability and bioactivity of polyetheretherketone has substantially impeded its clinical applications. Here, a dual therapy implant coating is developed on the 3D micro-/nanoporous sulfonated polyetheretherketone via layer-by-layer self-assembly of Ag ions and Zn ions. Material characterization studies have indicated that nanoparticles consisting of elemental Ag and ZnO are uniformly incorporated on the porous sulfonated polyetheretherketone surface...
May 21, 2018: Macromolecular Bioscience
https://www.readbyqxmd.com/read/29781768/guided-bone-regeneration-and-implant-placement-in-association-with-a-coronally-positioned-palatal-sliding-flap-a-17-year-follow-up-case-report
#2
Carlo Maiorana, Pier Paolo Poli, Mario Beretta
The aim of the present case report was to show the 17-year hard and soft tissues stability of guided bone regeneration procedure associated with dental implants insertion. A 52-year-old male patient presented with a partial edentulism in the upper right maxilla. A graft consisting of deproteinized bovine bone mineral and autogenous bone stabilized by a non-resorbable expanded polytetrafluoroethylene membrane was used to reconstruct the missing bone applying the biological principles of guided bone regeneration...
May 21, 2018: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29781765/individualized-titanium-mesh-combined-with-platelet-rich-fibrin-and-deproteinized-bovine-bone-a-new-approach-for-challenging-augmentation
#3
Jonas Lorenz, Sarah Al-Maawi, Robert Sader, Shahram Ghanaati
Autologous bone transfer is regarded as the gold standard for ridge augmentation before dental implantation, especially in severe bony defects caused by tumor resection or atrophy. In addition to the advantages of autologous bone, transplantation has several disadvantages, such as secondary operation, increased morbidity and pain. The present study reports, for the first time, a combination of a xenogeneic bone substitute (BO) with platelet-rich fibrin (PRF), which is a fully autologous blood concentrate derived from the patient's own peripheral blood by centrifugation...
May 21, 2018: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29781536/resorption-of-the-mandibular-residual-ridge-a-micro-ct-and-histomorphometrical-analysis
#4
Hannah Dekker, Engelbert A J M Schulten, Chris M Ten Bruggenkate, Elisabeth Bloemena, Leo van Ruijven, Nathalie Bravenboer
OBJECTIVES: The aim of this study was to investigate whether the extent of mandibular resorption and gender is related to the bone turnover and microarchitecture of the edentulous mandible. PARTICIPANTS AND METHODS: A mandibular bone sample was obtained at canine position from 36 edentulous participants (50% women; mean age: 65 years) during dental implant surgery. All female participants were postmenopausal. Mandibular height, duration of edentulous state and resorption pattern (Cawood classification) were recorded...
May 21, 2018: Gerodontology
https://www.readbyqxmd.com/read/29781181/effects-of-phosphatidylserine-containing-supported-lipid-bilayers-on-the-polarization-of-macrophages
#5
Hongxuan Quan, Yongjoon Kim, Hee Chul Park, Hyeong-Cheol Yang
Placement of dental implants initiates inflammatory foreign body response, in which macrophages play a central role and affect the subsequent tissue healing process such as bone formation. The purpose of this study was to fabricate phosphatidylserine (PS)-containing supported lipid bilayers (SLBs) on a titanium surface to regulate the polarization of macrophages, a critical factor that affects following tissue healing and regeneration. The fluorescent recovery after photobleaching (FRAP) images showed that the percentage of PS had a critical influence on the fluidity, and 20% PS had the highest fluidity...
May 20, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29779289/-orthodontic-intrusion-of-the-first-and-second-mandibular-molars-with-a-vacuum-formed-removable-appliance-a-case-report
#6
Qing Liu, Xin-Qi Huang, Dan Jiang, Hao-Jun Chi, Ling-Jie Wang, Wen-Tian Sun, Jun Liu
This case report focused on a patient with supraeruption of the first and second mandibular molars as a result of loss of the first and second maxillary molars for a long time. We adopted a combination of a vacuum-formed removable appliance and elastics to intrude the first and second mandibular molars by using a continuous, light force to acquire sufficient restoration space for maxillary molars. Thus, the dental-implant treatment was successful, and a good and stable occlusal relationship was established.
April 1, 2018: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/29779182/locator%C3%A2-versus-ceramic-electroplated-double-crown-attachments-a-prospective-study-on-the-intraindividual-comparison-of-implant-supported-mandibular-prostheses
#7
Silvia Brandt, Jan Brandt, Ali-Reza Ketabi, Hans-Christoph Lauer, Anna Kunzmann
OBJECTIVES: Implant-supported overdentures are an established dental treatment mode. The aim of this prospective study was and interindividual comparison of patient satisfaction with restorations retained by a prefabricated and thus inexpensive attachment system (Locator®) or with a technologically complex and thus expensive attachment system (ceramic/electroplated double crowns) with similar retentive performance. MATERIALS AND METHODS: Twelve patients received a Locator and a double-crown prosthesis in a crossover study for test periods of 3 months each...
May 19, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29778965/metal-hypersensitivity-in-the-context-of-connective-tissue-disease-an-opportunity-for-practice-prevention
#8
Jack Ρ Guccione, Sharon E Jacob
Metal hypersensitivity reactions (MHR) are not associated with metal containing orthodontic implants unless there is a positive history of dermatitis from a high nickel-release item (piercing post, earring, watch). We wish to present this letter to highlight evidence surrounding orthodontic-related nickel hypersensitivity and to bring to the readers attention current American Contact Dermatitis Society (ACDS) guidelines that endorse the importance of addressing metal hypersensitivity reactions in the setting of implantable dental devices...
May 17, 2018: Environmental Research
https://www.readbyqxmd.com/read/29778881/polymerase-chain-reaction-pcr-based-methods-promising-molecular-tools-in-dentistry
#9
REVIEW
Shahriar Shahi, Sepideh Zununi Vahed, Nazanin Fathi, Simin Sharifi
Polymerase chain reaction (PCR) has become a popular diagnosis and research technique in dentistry. Several studies show that its high sensitivity and specificity allow it as a precise, efficient, and rapid method for detection, identification, and quantification of microorganism. Several genetic polymorphisms can be determined along with detection of immune and inflammatory markers, therefore providing the more accurate perception into the mechanisms underlying the dental and periodontal disease. This review paper discusses the application of PCR as a diagnostic technique in periodontology, endodontic infections, implant-related, and peri-implantitis infection, immune and inflammatory markers identification and genetic polymorphism as well as application of next generation sequencing and gene microarray technology in dentistry mentioned...
May 17, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29778553/effects-of-non-thermal-plasma-on-sandblasted-titanium-dental-implants-in-beagle-dogs
#10
Yi-Wen Hung, Hui-Ling Chen, Li-Tsu Lee, Kwong-Chung Tung, Da-Tain Bau, Yong-Kie Wong
BACKGROUND: In this study, we investigated the effects of treating dental implants made from titanium with argon based non-thermal plasma, immediately before insertion on implant stability and bone formation. Biodegradable sandblasting and acid etching had been previously used to modify the surface of the implants. METHODS: To obtain data for 4-time points in triplicate with references, a total of 36 dental implants were divided into 2 groups; 18 implants served as the experimental group and received a spray containing non-thermal plasma, while the other 18 implants served as controls...
May 16, 2018: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29776851/treatment-planning-dose-accuracy-improvement-in-the-presence-of-dental-implants
#11
Holly M Parenica, John R Ford, Panayiotis Mavroidis, Ying Li, Nikos Papanikolaou, Sotirios Stathakis
Streaking artifacts in computed tomography (CT) scans caused by metallic dental implants (MDIs) can lead to inaccuracies in dose calculations. This study quantifies and compares the effect of MDIs on dose distributions using the collapsed cone convolution superposition (CCCS) and Monte Carlo (MC) algorithms, with and without correcting for the density of the MDIs. Ion chamber measurements were taken to test the ability of the algorithms in Pinnacle3 and Monaco to calculate dose near high-Z materials. Nine previously treated patients with head and neck cancer were included in this study...
May 15, 2018: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/29774969/combined-effect-of-parathyroid-hormone-and-strontium-ranelate-on-bone-healing-in-ovariectomized-rats
#12
Funda Göker, Selim Ersanlı, Volkan Arısan, Erdal Cevher, Emine Elif Güzel, Halim İşsever, Beyhan Ömer, Gülay Durmuş Altun, Deniz Morina, Tuğba Ekiz Yılmaz, Elmire Dervişoğlu, Massimo Del Fabbro
OBJECTIVE: Parathyroid hormone (PTH) enhances bone healing. Strontium ranelate (SR) is an antiresorptive agent that increases bone formation. Reports about combined effects of PTH and SR on local bone regeneration in osteoporotic subjects are limited. We aimed at investigating the efficacy of PTH and SR for promoting new bone formation in critical sized defects of ovariectomized rats. MATERIALS AND METHODS: PTH- and/or SR-containing poloxamer implant tablets with/without chitosan microparticles were delivered locally to calvarial defects of 90 Wistar rats...
May 18, 2018: Oral Diseases
https://www.readbyqxmd.com/read/29774206/emphysema-following-air-powder-abrasive-treatment-for-peri-implantitis
#13
Sung-Tak Lee, Malavika Geetha Subu, Tae-Geon Kwon
Background: Subcutaneous emphysema refers to swelling caused by the presence of air or gas in the interstices of loose connective tissue. In the head and neck area, it may follow the fascial planes and is characterized by sudden swelling, crepitus on palpation, infrequent pain, and air emboli on radiography. It usually occurs as a complication in dental treatment. Some reports have described subcutaneous emphysema caused by dental procedures; however, severe emphysema related to peri-implantitis after treatment has not been documented...
December 2018: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29773402/hydroxypropylmethyl-cellulose-hpmc-crosslinked-chitosan-ch-based-scaffolds-containing-bioactive-glass-bg-and-zinc-oxide-zno-for-alveolar-bone-repair
#14
Rabia Zeeshan, Zeeshan Mutahir, Haffsah Iqbal, Moazzam Ali, Farasat Iqbal, Kashif Ijaz, Faiza Sharif, Asma Tufail Shah, Aqif Anwar Chaudhry, Muhammad Yar, Shifang Luan, Ather Farooq Khan, Ihtesham-Ur-Rehman
The success of a dental implant relies on the presence of an optimal alveolar ridge. The aim of this study was to fabricate HPMC crosslinked chitosan based scaffolds for alveolar bone repair. Our results indicated that HPMC crosslinked CH/BG foams presented better morphological structure (132-90.5 μm) and mechanical responses (0.451 MPa with 100 mg BG) as confirmed by SEM analysis and fatigue testing respectively. Cytotoxicity analysis at day 2, 4 and 8 demonstrated that all composites were non-toxic and supported cellular viability...
August 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29772691/periodontal-tissues-maxillary-jaw-bone-and-tooth-regeneration-approaches-from-animal-models-analyses-to-clinical-applications
#15
REVIEW
Fareeha Batool, Marion Strub, Catherine Petit, Isaac Maximiliano Bugueno, Fabien Bornert, François Clauss, Olivier Huck, Sabine Kuchler-Bopp, Nadia Benkirane-Jessel
This review encompasses different pre-clinical bioengineering approaches for periodontal tissues, maxillary jaw bone, and the entire tooth. Moreover, it sheds light on their potential clinical therapeutic applications in the field of regenerative medicine. Herein, the electrospinning method for the synthesis of polycaprolactone (PCL) membranes, that are capable of mimicking the extracellular matrix (ECM), has been described. Furthermore, their functionalization with cyclosporine A (CsA), bone morphogenetic protein-2 (BMP-2), or anti-inflammatory drugs' nanoreservoirs has been demonstrated to induce a localized and targeted action of these molecules after implantation in the maxillary jaw bone...
May 16, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29772348/biosafety-stability-and-osteogenic-activity-of-novel-implants-made-of-zr-70-ni-16-cu-6-al-8-bulk-metallic-glass-for-biomedical-application
#16
Hiroto Ida, Masahiro Seiryu, Nobuo Takeshita, Masanari Iwasaki, Yoshihiko Yokoyama, Yusuke Tsutsumi, Etsuko Ikeda, Satoshi Sasaki, Shunro Miyashita, Shutaro Sasaki, Tomohiro Fukunaga, Toru Deguchi, Teruko Takano-Yamamoto
Superior mechanical and chemical properties of Zr70 Ni16 Cu6 Al8 bulk metallic glass (BMG) demonstrate its promise as a novel biomaterial for fabrication of implants. The aim of the present study was to validate mechanical, chemical, and biological properties of Zr70 Ni16 Cu6 Al8 BMG through comparison with titanium (Ti). Our data indicated higher tensile strength, lower Young's modulus, and reduced metal ion release of Zr70 Ni16 Cu6 Al8 BMG compared with Ti. Biosafety of bone marrow mesenchymal cells on Zr70 Ni16 Cu6 Al8 BMG was comparable to that of Ti...
May 14, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29772190/serum-metal-levels-in-maxillofacial-reconstructive-surgery-patients-a-pilot-study
#17
Louis G Mercuri, Michael Miloro, Anastasia K Skipor, Divya Bijukumar, Cortino Sukotjo, Mathew T Mathew
PURPOSE: The aim of this pilot study was to assay metal concentrations in the serum of patients who had undergone dental implant placement, orthognathic surgery using rigid metal fixation plates and screws, and total temporomandibular joint replacement (TMJ TJR). MATERIALS AND METHODS: Thirty patients were identified and included in this pilot study. Sixteen patients (9 men and 8 women), with an average age of 44 years (range, 19 to 79 yr), provided informed consent to participate and were divided into 3 study groups with 4 patients in each (group 1, orthognathic surgery; group 2, TMJ TJR; and group 3, dental implant placement)...
April 21, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29772189/comparison-of-intraoral-bone-regeneration-with-iliac-and-alveolar-bmscs
#18
F Wang, Y Zhou, J Zhou, M Xu, W Zheng, W Huang, W Zhou, Y Shen, K Zhao, Y Wu, D Zou
This study compared the osteogenic potential of bone marrow mesenchymal stem cells (BMSCs) of iliac and alveolar origins (I-BMSCs and Al-BMSCs, respectively), which were transplanted in combination with β tricalcium phosphate (β-TCP) in peri-implant bone defects to investigate the osseointegration between dental implants and tissue-engineered bone in dogs. Specifically, I-BMSCs and Al-BMSCs were cultured, characterized, and seeded on β-TCP and subjected to immunoblotting analyses and alkaline phosphatase activity assays...
May 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29771975/development-and-characterization-of-an-oral-multispecies-biofilm-implant-flow-chamber-model
#19
Nadine Kommerein, Katharina Doll, Nico S Stumpp, Meike Stiesch
Peri-implant infections are the most common cause of implant failure in modern dental implantology. These are caused by the formation of biofilms on the implant surface and consist of oral commensal and pathogenic bacteria, which harm adjacent soft and hard tissues and may ultimately lead to implant loss. In order to improve the clinical situation, there has to be a better understanding of biofilm formation on abiotic surfaces. Therefore, we successfully developed a system to cultivate an oral multispecies biofilm model in a flow chamber system, optimized for the evaluation of biofilm formation on solid materials by direct microscopic investigation...
2018: PloS One
https://www.readbyqxmd.com/read/29770562/evaluation-of-dental-implant-stability-in-bone-phantoms-comparison-between-a-quantitative-ultrasound-technique-and-resonance-frequency-analysis
#20
Romain Vayron, Vu-Hieu Nguyen, Benoît Lecuelle, Guillaume Haiat
BACKGROUND: Resonance frequency analyses and quantitative ultrasound methods have been suggested to assess dental implant primary stability. PURPOSE: The purpose of this study was to compare the results obtained using these two techniques applied to the same dental implants inserted in various bone phantoms. MATERIALS AND METHODS: Different values of trabecular bone density and cortical thickness were considered to assess the effect of bone quality on the respective indicators (UI and ISQ)...
May 16, 2018: Clinical Implant Dentistry and related Research
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