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https://www.readbyqxmd.com/read/28421736/enhancing-the-bioactivity-of-yttria-stabilized-tetragonal-zirconia-ceramics-via-grain-boundary-activation
#1
Jinhuan Ke, Jiandong Ye, Fupo He
Yttria-stabilized tetragonal zirconia (Y-TZP) has been proposed as a potential dental implant due to its good biocompatibility, excellent mechanical properties, and distinctive aesthetic effect. However, Y-TZP cannot form chemical bonds with bone tissue because of its biological inertness, which affects the reliability and long-term efficacy of Y-TZP implants. In this study, to improve the bioactivity of Y-TZP ceramics while maintaining their good mechanical performance, Y-TZP was modified by grain boundary activation via the infiltration of a bioactive glass (BG) sol into the surface layer of Y-TZP ceramics under different negative pressures (atmospheric pressure, -0...
April 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28415466/effect-of-lubricant-on-the-reliability-of-dental-implant-abutment-screw-joint-an-in-vitro-laboratory-and-three-dimension-finite-element-analysis
#2
Tingting Wu, Hongyi Fan, Ruiyang Ma, Hongyu Chen, Zhi Li, Haiyang Yu
Biomechanical factors play a key role in the success of dental implants. Fracture and loosening of abutment screws are major issues. This study investigated the effect of lubricants on the stability of dental implant-abutment connection. As lubricants, graphite and vaseline were coated on the abutment screw surface, respectively, and a blank without lubricant served as the control. The total friction coefficient (μtot), clamping force, fatigue behavior and detorque of the joint combined with dynamic cyclic loading were measured under different lubricating conditions...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28406881/early-healing-evaluation-of-commercially-pure-titanium-and-ti-6al-4v-presenting-similar-surface-texture-an-in-vivo-study
#3
Arthur Castellano, Luiz F Gil, Estevam A Bonfante, Nick Tovar, Rodrigo Neiva, Malvin N Janal, Paulo G Coelho
OBJECTIVE: This study evaluated the osseointegration of commercially pure titanium (Ti) grade-2 (G2) and Ti-6Al-4V alloy (G5) implants with the same geometry and surface treatment. MATERIALS AND METHODS: Thirty-six dental implants with a grit-blasted acid-etched surface were used (n = 18, each). Two implants, one per group, were installed in each subject, in the radius diaphysis (n = 18 beagle dogs), with interchanged fixture position (proximal-distal) between animals for a balanced number of devices per group and time in vivo (1, 3, and 6 weeks)...
April 12, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28406458/behavior-of-human-osteoblast-cells-cultured-on-titanium-discs-in-relation-to-surface-roughness-and-presence-of-melatonin
#4
M Fernanda Sola-Ruiz, Carolina Perez-Martinez, Carlos Labaig-Rueda, Carmen Carda, J Javier Martín De Llano
The aim of this work was to observe the behavior of osteoblast cells cultured in vitro on titanium discs in relation to disc surface roughness and the addition of melatonin to the culture medium. MG63 osteoblast cells were cultivated on 120 Grade 5 Ti divided into three groups: Group E, treated with dual acid etch; Group EP, treated with dual acid etch and calcium phosphate; and Group M, machined. Surface roughness was examined under a laser scanning confocal microscope (CLSM) and scanning electron microscopy (SEM)...
April 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28403796/riboswitches-as-potential-targets-for-the-development-of-anti-biofilm-drugs
#5
José A Reyes-Darias, Tino Krell
In nature, bacteria can exist as single motile cells or as sessile cellular community, known as microbial biofilms. Bacteria within biofilms are embedded in a self-produced extracellular matrix that makes them more resistant to antibiotic treatment and responses of the host immune system. Microbial biofilms are very important in medicine since they are associated with several human diseases such as dental caries, periodontitis, otitis media, infective endocarditis, infectious kidney stones, osteomyelitis or prostatitis...
April 7, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28402342/survival-rates-and-bone-and-soft-tissue-level-changes-around-one-piece-dental-implants-placed-with-a-flapless-or-flap-protocol-8-5-year-results
#6
Stuart J Froum, Ismael Khouly
The purpose of the current study was to determine the survival rates and to measure marginal bone changes and peri-implant conditions 8.5 years after placement of one-piece implants with an anodically oxidized surface (AOS). A total of 52 subjects who received a one-piece implant with an AOS using a flapless or flap protocol and completed a previous randomized clinical trial were contacted for a recall visit 8.5 years after implant placement (T8.5). Implant success and survival rates, probing pocket depth (PPD), presence of bleeding on probing (BoP), papilla level, and incidence of complications and peri-implant disease were assessed by a single, blinded examiner...
May 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28398151/assessing-bone-type-of-implant-recipient-sites-by-stereomicroscopic-observation-of-bone-core-specimens-a-comparison-with-the-assessment-using-dental-radiography
#7
Min-Wen Fu, E-Chin Shen, Earl Fu, Fu-Gong Lin, Tian-You Wang, Hsien-Chung Chiu
BACKGROUND: We aimed to determine if bone quality evaluation of surgically obtained bone core specimens using a stereomicroscope is reliable for determining bone quality at implant recipient sites. METHODS: Bone quality was pre-surgically assessed in 122 edentulous ridges obtained from 62 patients using periapical radiographs and categorized according to the Lekholm and Zarb classification. During surgery, bone specimens were trephined, and bone types were immediately classified using a stereomicroscope...
March 10, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28393822/anodized-dental-implant-surface
#8
REVIEW
Sunil Kumar Mishra, Muktadar Anand Kumar, Ramesh Chowdhary
PURPOSE: Anodized implants with moderately rough surface were introduced around 2000. Whether these implants enhanced biologic effect to improve the environment for better osseointegration was unclear. The purpose of this article was to review the literature available on anodized surface in terms of their clinical success rate and bone response in patients till now. MATERIALS AND METHODS: A broad electronic search of MEDLINE and PubMed databases was performed. A focus was made on peer-reviewed dental journals...
January 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28392948/advanced-implant-prosthetic-rehabilitation-how-to-obtain-a-correct-restoration-of-both-functions-and-aesthetics-in-patients-with-complex-combined-dental-and-maxillofacial-trauma-a-case-report-and-topical-review-of-the-literature
#9
M M Figliuzzi, A Giudice, L Fortunato
Aim. This study aims to explain the main steps that characterize the implant-prosthetic rehabilitation in complex combined dental and maxillofacial trauma. Material and Methods. A 20-year-old patient reported an extensive facial trauma which also involved the alveolar process of the maxillary bone. The patient reported a maxillofacial fracture and the loss of teeth 1.3, 1.2, 1.1, and 2.1. A "Le Fort" type 2 fracture was also reported, with the malar bone involvement. After reduction and containment of bone fractures, through appropriate mounting plates, appropriate functional and aesthetic rehabilitation of the patient were replaced thanks to a temporary removable prosthesis...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28391381/osseointegration-improves-bone-implant-interface-of-pedicle-screws-in-the-growing-spine-a-biomechanical-and-histological-study-using-an-in-vivo-immature-porcine-model
#10
Kanako Shiba, Hiroshi Taneichi, Takashi Namikawa, Satoshi Inami, Daisaku Takeuchi, Yutaka Nohara
PURPOSE: Implant failure is a frequent complication in corrective surgery for early onset scoliosis, since considerable forces are acting on small and fragile vertebrae. Osseointegration showing biomechanical and histological improvement in bone-implant interface (BII) after dental implant placement has been well investigated. However, there are no studies regarding osseointegration in immature vertebral bone. The purpose was to evaluate the timecourse of biomechanical and histological changes at BII after pedicle screw placement using in vivo immature porcine model...
April 8, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28390131/radiodensitometric-study-for-evaluation-of-bone-mineral-density-around-dental-implants-after-zoledronic-acid-treatment-in-ovariectomized-rats
#11
S Dikicier, E Dikicier, U Karacayli, B Erguder
BACKGROUND: The purpose of this study was to evaluate the effects of intravenous zoledronic acid applied systemically on osseointegration of dental implants and the surrounding bone mineral density (BMD) in the ovariectomized rats. MATERIAL AND METHODS: 36 rats were divided into three groups: control (CTRL), ovariectomy (OVX), and ovariectomy-zoledronic acid (OVX/ZOL). The rats in the CTRL group underwent sham surgery, while rats in OVX and OVX / ZOL group underwent ovariectomy...
April 8, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/28389025/the-effect-of-2-versus-4-implants-on-implant-stability-in-mandibular-overdentures-a-randomized-controlled-trial
#12
Wafa'a R Al-Magaleh, Amal A Swelem, Iman A W Radi
STATEMENT OF PROBLEM: Dental research is rich with articles that investigated the influence of host-site variables, some implant-related variables (implant length, diameter, taper, design, location, and surface topography), different loading protocols or surgical procedures, and measurement methodology on dental implant stability. However, the number of implants and its effect on implant stability remain unclear. PURPOSE: The purpose of this randomized clinical trial was to investigate the influence of implant number on implant stability by comparing 2 versus 4 implants in mandibular implant overdentures...
April 4, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28386851/in-vivo-osseointegration-of-dental-implants-with-an-antimicrobial-peptide-coating
#13
X Chen, X C Zhou, S Liu, R F Wu, C Aparicio, J Y Wu
This study aimed to evaluate the in vivo osseointegration of implants with hydrophobic antimicrobial GL13K-peptide coating in rabbit femoral condyles by micro-CT and histological analysis. Six male Japanese Rabbits (4 months old and weighing 2.5 kg each) were included in this study. Twelve implants (3.75 mm wide, 7 mm long) were randomly distributed in two groups, with six implants in the experimental group coated with GL13K peptide and six implants in the control group without surface coating. Each implant in the test and the control group was randomly implanted in the left or right side of femoral condyles...
May 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28380669/antibacterial-and-bioactive-coatings-on-titanium-implant-surfaces
#14
Anupama Kulkarni Aranya, Smruti Pushalkar, Minglei Zhao, Racquel Z LeGeros, Yu Zhang, Deepak Saxena
Various surface modifications have been tried for enhancing osseointegration of the dental implants like mechanical and/or chemical treatments and deposition of calcium phosphate coatings. The objective of this research was to develop calcium-phosphate based thin coatings with antibacterial and bioactive properties for potential application in dental implants. Titanium (Ti) discs were immersed in different calcifying solutions: CaP (positive control), F-CaP, Zn-CaP and FZn-CaP and incubated for 24 h. Negative control was uncoated Ti discs...
April 5, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28374679/in-vitro-study-of-electrodeposited-fluoridated-hydroxyapatite-coating-on-g-ii-titanium-with-a-nanostructured-tio2-interlayer
#15
Jin-Shyong Lin, Tzung-Bau Tsai, Wen-Ching Say, Chun Chiu, Shih-Hsun Chen
Titanium and its alloys have been widely used as orthopedic and dental implants for several decades due to their superior mechanical properties, corrosion resistance and biocompatibility. Recently, many researches revealed that the hydroxyapatite coatings on biomedical materials can further improve their biocompatibility and bioactivity. However, hydroxyapatite coatings are easily decomposed, weakening the bonding between implants and bone tissues and resulting in a high dissolution rate in the biological environment...
April 4, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28371254/nanotextured-titanium-surfaces-stimulate-spreading-migration-and-growth-of-rat-mast-cells
#16
William Marcatti Amarú Maximiano, Vivian Marino Mazucato, Paulo Tambasco de Oliveira, Maria Célia Jamur, Constance Oliver
Titanium is a biomaterial widely used in dental and orthopedic implants. Since tissue-implant interactions occur at the nanoscale level, nanotextured titanium surfaces may affect cellular activity and modulate the tissue response that occurs at the tissue-implant interface. Therefore, the characterization of diverse cell types in response to titanium surfaces with nanotopography is important for the rational design of implants. Mast cells are multifunctional cells of the immune system that release a range of chemical mediators involved in the inflammatory response that occurs at the tissue-implant interface...
March 28, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28370489/volumetric-changes-and-peri-implant-health-at-implant-sites-with-or-without-soft-tissue-grafting-in-the-esthetic-zone-a-retrospective-case-control-study-with-a-5-year-follow-up
#17
Stefan P Bienz, Ronald E Jung, Vitor M Sapata, Christoph H F Hämmerle, Jürg Hüsler, Daniel S Thoma
OBJECTIVES: To evaluate the volumetric changes and peri-implant health at implant sites with and without previous soft tissue grafting over a 5-year observation period. MATERIAL AND METHODS: In 18 partially edentulous patients, dental implants were placed in the esthetic zone (15-25) with simultaneous guided bone regeneration, followed by submerged healing. During the healing phase, eight patients (test) received a subepithelial connective tissue graft, whereas 10 patients (control) did not receive any soft tissue augmentation...
March 29, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28365383/a-comparative-study-of-the-effectiveness-of-early-and-delayed-loading-of-short-tissue-level-dental-implants-with-hydrophilic-surfaces-placed-in-the-posterior-section-of-the-mandible-a-preliminary-study
#18
Arkadiusz Makowiecki, Ute Botzenhart, Julia Seeliger, Friedhelm Heinemann, Peter Biocev, Marzena Dominiak
The objective of the present study was to compare the primary and secondary stability of tissue-level short dental titanium implants with polished necks and hydrophilic surfaces of two different designs and manufacturers. The first implant system used (SPI(®)ELEMENT RC INICELL titanium implants, Thommen Medical AG, Grenchen, Switzerland), allowed functional loading 6 weeks after its placement, whereas the second implant system (RN SLActiv(®) tissue-level titanium implants, Straumann GmbH, Fribourg, Germany), was loaded after 15 weeks...
March 30, 2017: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/28361434/comparative-analysis-of-structural-responses-of-rat-subcutaneous-fat-on-the-implantation-of-samples-of-polymethyl-methacrylate-with-hydrophobic-and-hydrophilic-surface
#19
E O Kudasova, L F Vlasova, D E Semenov, E L Lushnikova
Morphological analysis of the subcutaneous fat was performed in rats after subcutaneous implantation of basic dental plastic materials with different hydrophobic and hydrophilic properties. It was shown that subcutaneous implantation of dental plastics with mostly hydrophobic surface and low biocompatibility induced destructive and inflammatory processes of various intensities, sometimes with allergic component; morphological signs of processes persisted for 6 weeks. Modification of basic plastics using glow-discharge plasma and enhancement of their hydrophilicity and biocompatibility significantly reduced the intensity of destructive and inflammatory processes and ensured more rapid (in 2 weeks) repair of the destroyed tissues with the formation of fibrous capsule around the implant...
March 31, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28343672/effect-of-titanium-and-zirconia-dental-implant-abutments-on-a-cultivable-polymicrobial-saliva-community
#20
Erica D de Avila, Carlos Eduardo Vergani, Francisco A Mollo Junior, Miguel Jafelicci Junior, Wenyuan Shi, Renate Lux
STATEMENT OF PROBLEM: Periimplantitis is considered the most important biological complication responsible for late implant failure. The physical chemical properties intrinsic to each material can affect the first step to biofilm development and is an important precursor to the adaptive behavior of pathogenic bacteria species. PURPOSE: The purpose of this in vitro study was to evaluate the effect of 2 commercially available implant abutment materials on the adhesion phase and biofilm formation...
March 23, 2017: Journal of Prosthetic Dentistry
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