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https://www.readbyqxmd.com/read/28230589/effects-of-local-and-systemic-zoledronic-acid-application-on-titanium-implant-osseointegration-an-experimental-study-conducted-on-two-surface-types
#1
Serkan Dundar, Ferhan Yaman, Orhan Gecor, Omer Cakmak, Mustafa Kirtay, Tuba Talo Yildirim, Tahir Karaman, Mehmet Emre Benlidayi
The aim of this study was to evaluate the effects of local and systemic zoledronic acid (ZA) applications on titaniumoksit ceramic blasted (TiO-CB)- and sandblasted large acid-grit (SLA)-surfaced titanium implant osseointegration. Twelve New Zealand White rabbits were used in the study, divided into 6 groups: the TiO-CB (TiO-CB-CNT) (n = 2) and SLA (SLA-CNT) (n = 2) control groups in which TiO-CB- and SLA-surfaced titanium implants were surgically inserted into rabbit tibias but no treatment was applied; the TiO-CB (TiO-CB-LZA) (n = 2) and SLA (SLA-LZA) (n = 2) local ZA groups in which 1 mL of normal saline solution containing 2 mg of ZA was injected into sockets and after this the implants were integrated; and the TiO-CB (TiO-CB-SZA) (n = 2) and SLA (SLA-SZA) (n = 2) systemic ZA groups in which a single infusion of 0...
February 22, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28226901/investigations-on-different-epoxies-for-electrical-insulation-of-microflex-structures
#2
P Cvancara, S Lauser, L Rudmann, T Stieglitz, P Cvancara, S Lauser, L Rudmann, T Stieglitz, P Cvancara, S Lauser, T Stieglitz, L Rudmann
The microflex interconnection (MFI) technique is often used to connect electrically and mechanically thin film ribbons or electrodes with a solid substrate like screen printed ceramics. For stabilization reasons epoxy is used to fix the MFI structure. As epoxy tends to form cracks when surrounded by water or electrolytes we are eager to find an epoxy which provides sufficient insulation between the single channels of the MFI structure also in a moist surrounding. Therefore we designed a device to investigate the insulating properties of different epoxies (Uhu Plus Endfest 300, Epo-Tek 353ND and 353ND-T) immersed in saline solution...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28222879/evaluation-of-die-trim-morphology-made-by-cad-cam%C3%A2-technology
#3
Pratiksha Agrawal, Geoffrey Thompson, Seok-Hwan Cho, Gerald J Ziebert
STATEMENT OF PROBLEM: The die contour can affect the emergence profile of prosthetic restorations. However, little information is available regarding the congruency between a stereolithographic (SLA) die and its corresponding natural tooth. PURPOSE: The purpose of this vitro study was to evaluate the shapes of SLA die in comparison with the subgingival contour of a prepared tooth to be restored with a ceramic crown. MATERIAL AND METHODS: Twenty extracted human teeth, 10 incisors, and 10 molars, were disinfected and mounted in a typodont model...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222877/fracture-of-layered-zirconia-restorations-at-5-years-a-dental-laboratory-survey
#4
Aous A Abdulmajeed, Terence E Donovan, Lyndon F Cooper, Ricardo Walter, Taiseer A Sulaiman
STATEMENT OF PROBLEM: The use of ceramic restorations has significantly increased in recent years because of their esthetic properties and the high cost of noble metals. However, given the lack of long-term clinical trials and the limitations of in vitro studies, the durability of ceramic restorations is still questionable. PURPOSE: The purpose of this retrospective study was to determine the fracture rate of layered zirconia restorations at up to 5 years of clinical performance by using a dental laboratory survey model...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28221974/evaluation-of-a-surface-sampling-method-for-recovery-of-human-noroviruses-prior-to-detection-using-reverse-transcription-quantitative-pcr
#5
Grace Tung-Thompson, Blanca I Escudero-Abarca, Janie Outlaw, Arnaud Ganee, Sylvanie Cassard, Claude Mabilat, Lee-Ann Jaykus
Human noroviruses are the most common cause of acute viral gastroenteritis, and the environmental persistence of these viruses contributes to their transmissibility. Environmental sampling is thus an important tool for investigating norovirus outbreaks and for assessing the effectiveness of cleaning and decontamination regimens. The purpose of this study was to evaluate a sampling material (wipes) for their efficacy at recovering human norovirus from hard surfaces and foods. Dilutions of a human norovirus GII...
February 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28218379/the-corail-stem-as-a-reverse-hybrid-survivorship-and-x-ray-analysis-at-10-years
#6
Helge Wangen, Lars Nordsletten, Jens G Boldt, Anne M Fenstad, David E Beverland
BACKGROUND: The use of a cemented cup together with an uncemented stem in total hip arthroplasty (THA) has become popular in Norway and Sweden during the last decade. The results of this prosthetic concept, reverse hybrid THA have been sparsely described.We report our experience of reverse hybrid THA, using the Elite plus polyethylene cemented cup together with the Corail fully hydroxyapatite-coated uncemented stem and a 28-mm alumina ceramic head. PATIENTS AND METHODS: 132 consecutive reverse hybrid hip arthroplasties were performed from January 2000 to December 2003 in 126 patients with a mean age of 54...
February 8, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28216850/versatility-of-peek-as-a-fixed-partial-denture-framework
#7
Nikita Sinha, Nidhi Gupta, K Mahendranadh Reddy, Y M Shastry
Materials used for fixed partial denture (FPD) frameworks have had properties of excellent strength, durability, and biocompatibility. Some of the materials which have been used till date include alloys, ceramics, and high-performance polymers such as zirconia, Ni-Cr, lithium disilicate, and so on. All these, though excellent, have their advantages and disadvantages. Hence, the search has always been on for a better material. One such material, which has made its foray into dentistry in the recent times, is polyetheretherketone (PEEK)...
January 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/28216846/three-dimensional-finite-element-analysis-of-the-stress-distribution-pattern-in-a-mandibular-first-molar-tooth-restored-with-five-different-restorative-materials
#8
Kathleen Manuela D'souza, Meena Ajay Aras
INTRODUCTION: Badly broken or structurally compromised posterior teeth are frequently associated with crown/root fracture. Numerous restorative materials have been used to fabricate indirect full-coverage restorations for such teeth. This study aims to evaluate and compare the effect of restorative materials on the stress distribution pattern in a mandibular first molar tooth, under varying loading conditions and to compare the stress distribution pattern in five commonly used indirect restorative materials...
January 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/28214537/biomechanical-behavior-of-endodontically-treated-premolars-using-different-preparation-designs-and-cad-cam-materials
#9
Diogo Pedrollo Lise, Annelies Van Ende, Jan De Munck, Thaís Yumi Umeda Suzuki, Luiz Clovis Cardoso Vieira, Bart Van Meerbeek
OBJECTIVES: To evaluate the effect of restoration design ('2.5-mm deep endocrown', '5-mm deep endocrown' or '5-mm deep post&crown') and CAD/CAM material type (composite or lithium disilicate glass-ceramic) on the load-to-failure of endodontically treated premolars in absence of any ferrule. METHODS: The crowns of 48 single-rooted premolars were cut and the roots were endodontically treated. Teeth were randomly divided into six groups (n=8); teeth in each group were restored using one of the two tested materials with standardized CAD/CAM fabricated endocrowns (with either 2...
February 15, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28212978/a-systematic-review-of-the-survival-and-complication-rates-of-inlay-retained-fixed-dental-prostheses
#10
REVIEW
Junyu Chen, He Cai, Lai Suo, Yiyuan Xue, Jian Wang, Qianbing Wan
OBJECTIVES: The aim of this systematic review was to investigate the survival and complication rates of inlay-retainer fixed dental prostheses (IRFDPs). DATA/SOURCES: A systematic search was conducted in the PubMed, EMBASE, and Cochrane Library databases in English and time filters (articles published from 1960) were used. STUDY SELECTION: Randomized controlled trails (RCTs), controlled clinical trials (CCTs) and prospective cohort studies on IRFDPs with a mean follow-up period of at least 2 years were included...
February 14, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28209274/long-term-durability-of-ceramic-tri-condylar-knee-implants-a-minimum-15-year-follow-up
#11
Shinichiro Nakamura, Hiromu Ito, Kenji Nakamura, Shinichi Kuriyama, Moritoshi Furu, Shuichi Matsuda
BACKGROUND: Ceramic bearings are not commonly used in total knee arthroplasty (TKA). So far, little information is available about whether long-term survivorship and good clinical outcomes can be ensured with ceramic knee implants. The purposes of the present study were to evaluate the clinical and radiological outcomes, and to assess the long-term durability of a ceramic tri-condylar implant. METHODS: A total of 507 consecutive TKAs were carried out using a ceramic tri-condylar femoral implant...
January 20, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28209033/in-vitro-investigation-of-bioactive-glass-ceramic-composites-based-on-biogenic-hydroxyapatite-or-synthetic-calcium-phosphates
#12
Nataliia Pinchuk, Oleksandr Parkhomey, Olena Sych
This in vitro investigation of the behavior of two types of calcium phosphate glass ceramics on the basis of phosphates of biogenic or synthetic origin prepared from initial mixtures with different particle size has revealed that some different factors affect the behavior, namely the phase composition of composite, fraction of open porosity, and average diameter of pore channels. It was established that the solubility of the composites on the basis of synthetic calcium phosphates and glass after 2 and 7 days contact with saline composites is the highest among the materials under study...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28209008/effect-of-resin-bonded-luting-agents-influencing-marginal-discrepancy-in-all-ceramic-complete-veneer-crowns
#13
Dhanraj Ganapathy, Anusha Sathyamoorthy, Hemalatha Ranganathan, Karthikeyan Murthykumar
INTRODUCTION: Marginal discrepancy severely affects the long term success of All ceramic complete veneer crowns. The precise role of resin luting agents influencing this phenomenon needs to be explored further. AIM: To estimate and compare the marginal discrepancy in CAD/CAM processed All ceramic complete veneer crowns prior and following luting with resin bonded luting agents. MATERIALS AND METHODS: Extracted human maxillary first premolars were randomly allocated into four groups of 27 samples each Viz...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28194358/effect-of-adhesive-luting-on-the-fracture-resistance-of-zirconia-compared-to-that-of-composite-resin-and-lithium-disilicate-glass-ceramic
#14
Myung-Jin Lim, Kwang-Won Lee
OBJECTIVES: The purpose of this study was to evaluate the effect of adhesive luting on the fracture resistance of zirconia compared to that of a composite resin and a lithium disilicate glass ceramic. MATERIALS AND METHODS: The specimens (dimension: 2 mm × 2 mm × 25 mm) of the composite resin, lithium disilicate glass ceramic, and yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) were prepared. These were then divided into nine groups: three non-luting groups, three non-adhesive luting groups, and three adhesive luting groups, for each restorative material...
February 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/28190812/influence-of-core-thickness-and-artificial-aging-on-the-biaxial-flexural-strength-of-different-all-ceramic-materials-an-in-vitro-study
#15
Sibel Dikicier, Simel Ayyildiz, Julide Ozen, Cumhur Sipahi
The purpose of this study was to investigate the flexural strength of all-ceramics with varying core thicknesses submitted to aging. In-Ceram Alumina (IC), IPS e.max Press (EM) and Katana (K) (n=40), were selected. Each group contained two core groups based on the core thickness as follows: IC/0.5, IC/0.8, EM/0.5, EM/0.8, K/0.5 and K/0.8 mm in thickness (n=20 each). Ten specimens from each group were subjected to aging and all specimens were tested for strength in a testing machine either with or without being subjected aging...
February 11, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28188110/accuracy-and-mechanical-performance-of-passivated-and-conventional-fabricated-3-unit-fixed-dental-prosthesis-on-multi-unit-abutments
#16
Michael Stimmelmayr, Julian Groesser, Florian Beuer, Kurt Erdelt, Gerald Krennmair, Caroline Sachs, Daniel Edelhoff, Jan-Frederik Güth
PURPOSE: The aim of this study was to evaluate the fit and mechanical stability of conventional versus passive fitting 3-unit fixed dental prosthesis (FDP) screw-retained on implants. METHODS: Twenty acrylic models, each with two embedded implants, were fabricated and functioned as patient-models. Impressions were taken and 20 all-ceramic FDPs were pre-fabricated on the plaster casts. Respectively 10 FDPs were fixed on the plaster casts (group 1) and on the patient-models for passive fitting (group 2)...
February 7, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28185678/in-vitro-fatigue-and-fracture-testing-of-cad-cam-materials-in-implant-supported-molar-crowns
#17
Verena Preis, Sebastian Hahnel, Michael Behr, Laila Bein, Martin Rosentritt
OBJECTIVE: To investigate the fatigue and fracture resistance of different CAD/CAM-materials as implant- or tooth-supported molar crowns with respect to the clinical procedure (screwed/bonded restoration). METHODS: 168 crowns were fabricated from different CAD/CAM-materials (n=8/material): ZLS (zirconia-reinforced lithium silicate ceramic; Suprinity, Vita-Zahnfabrik), COB (composite; Brilliant Crios, Coltene), COL (composite; Lava Ultimate, 3M Espe), PMV/PPV (polyether ether ketone (PEEK)+milled composite veneer/composite paste veneer; BioHPP+HIPC veneer/Crealign veneer, Bredent), COH (composite; Block HC, Shofu), and ZIR (zirconia; IPS e...
February 6, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28183587/mg-ca-ratio-as-regulating-factor-for-osteoclastic-in-vitro-resorption-of-struvite-biocements
#18
Carina Blum, Theresa Brückner, Andrea Ewald, Anita Ignatius, Uwe Gbureck
Bioceramic degradation can occur by both passive dissolution and following active osteoclastic bone remodeling. Key parameters controlling ceramic degradation are the pH-dependent solubility product of the ceramic phase, which alters ion concentrations in physiological solution and hence regulates cell activity. This study investigated the in vitro degradation profiles of various calcium magnesium phosphate ceramics formed at low temperature. The passive resorption was measured by incubating the cement samples in cell culture medium, while active resorption was determined during a surface culture of multinuclear osteoclastic cells derived from RAW 264...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28174009/ceramic-strengthening-by-tuning-the-elastic-moduli-of-resin-based-luting-agents
#19
Aloísio O Spazzin, Ataís Bacchi, Rodrigo Alessandretti, Mateus B Santos, Gabriela R Basso, Jason Griggs, Rafael R Moraes
OBJECTIVE: Resin-based luting agents (RBLAs) with tuned elastic moduli (E) were prepared and their influence on the strengthening, reliability, and mode of failure of luted feldspar ceramic was investigated. METHODS: RBLAs with low E (2.6GPa), intermediate E (6.6GPa), and high E (13.3GPa) were prepared and used to coat acid-etched ceramic disks. Positive (untreated ceramic) and negative (acid-etched ceramic) control groups were tested. The response variables (n=30) were biaxial flexural strength (σbf, MPa), characteristic strength (σ0, MPa), and Weibull modulus at the ceramic surface (z=0) and luting agent surface (z=-t2)...
February 4, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28167867/hip-resurfacing-international-perspectives-review-article
#20
REVIEW
Julien Girard
BACKGROUND: The hip resurfacing concept was developed for young and active patients, especially for femoral bone stock preservation. However, concerns about metal-on-metal bearings with adverse reactions to metal debris have led to a drop off in hip-resurfacing procedures. QUESTIONS/PURPOSES: The goal of this review is to evaluate our current knowledge of survivorship of second-generation hip resurfacing devices and elaborate international perspectives for product improvement...
February 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
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