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https://www.readbyqxmd.com/read/29912481/osseointegration-of-zirconia-implants-with-3-varying-surface-textures-and-a-titanium-implant-a-histological-and-micro-ct-study
#1
Paweł Kubasiewicz-Ross, Jakub Hadzik, Marzena Dominiak
BACKGROUND: Zirconium - a bioinert metal - in comparison with titanium implants, offers a variety of potential advantages for use in the esthetic area of dentistry due to its tooth-like color. Zirconium dental implants are considered to be an alternative method of treatment to conventional titanium dental implants for patients with a thin gingival biotype. OBJECTIVES: This study was designed to study the bone tissue response to new zirconia implants with modified surfaces in comparison with commercially available titanium dental implants and commercially available zirconia implants...
June 18, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29898029/fatigue-strength-of-several-dental-ceramics-indicated-for-cad-cam-monolithic-restorations
#2
Gabriela Nishioka, Catina Prochnow, Aline Firmino, Marina Amaral, Marco Antonio Bottino, Luiz Felipe Valandro, Melo Renata Marques de
This in vitro study evaluated the fatigue strength of different ceramic materials indicated for monolithic restorations. Disc-shaped specimens were made according to ISO 6872 from five different ceramic materials: feldspathic ceramic (FC), polymer-infiltrated ceramic network (PIC), lithium disilicate glass-ceramic (LD), zirconia-reinforced lithium silicate glass-ceramic (ZLS), and high translucent tetragonal zirconia polycrystals doped by yttrium (YZ-HT). After obtaining the mean of each material (n = 5) from monotonic load-to-failure tests, specimens (n = 20) were subjected to fatigue tests (staircase method) using a biaxial flexural setup (piston-on-three-balls), to determine the fatigue strength...
June 11, 2018: Brazilian Oral Research
https://www.readbyqxmd.com/read/29897352/esthetic-evaluation-of-maxillary-single-tooth-zirconia-implants-in-the-esthetic-zone
#3
Kristian Kniha, Heinz Kniha, Ingrid Grunert, Daniel Edelhoff, Frank Hölzle, Ali Modabber
The purpose of this study was to evaluate ceramic dental implants using different esthetic scores. A total of 53 ceramic dental implants were evaluated using the Pink Esthetic Score (PES), White Esthetic Score (WES), and Peri-Implant and Crown Index (PICI). Prosthodontists, orthodontists, oral surgeons, and dentistry students independently performed assessments. The mean value of combined PES + WES was 17.4 points, and the PICI was 523.2 points. Orthodontists assessed a significantly lower result in both indices compared to all other assessor groups (P ≤ ...
June 12, 2018: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29892909/sol-gel-based-calcium-phosphates-coatings-deposited-on-binary-ti-mo-alloys-modified-by-laser-beam-irradiation-for-biomaterial-clinical-applications
#4
Marcio Luiz Dos Santos, Carla Dos Santos Riccardi, Edson de Almeida Filho, Antonio C Guastaldi
Ti-15Mo alloy samples were irradiated by pulsed Yb: YAG laser beam under air and atmospheric pressure. Calcium phosphate coatings were deposited on the irradiated surfaces by the sol-gel method. The sol was prepared from the precursors Ca (NO3 )2 .4H2 O and H3 PO4 . The modified surfaces were submitted to heat treatment conditions at 350 and 600 °C. The results showed that the two conditions established have a sufficient energy to promote ablation on the laser beam irradiated surfaces. Likewise, it has been demonstrated the processes of fusion and fast solidification from the laser beam irradiation, under ambient atmosphere, inducing the formation of stoichiometric TiO2 and non-stoichiometric titanium oxides, including Ti3 O5 , TiO, Ti3 O and Ti6 O with different oxide percentages depending on the fluency used...
June 11, 2018: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/29889916/clinical-performance-of-cad-cam-tooth-supported-ceramic-restorations-a-systematic-review
#5
Inês Filipa Alves de Carvalho, Tiago Miguel Santos Marques, Filipe Miguel Araújo, Luís Filipe Azevedo, Helena Donato, André Correia
Owing to an increased demand for safe and esthetically pleasing dental materials, ceramics have been developed and optimized to rehabilitate anterior and posterior teeth. This evolution in ceramic materials is directly related to the development of sophisticated processing technologies and systems for use in dental medicine, particularly computer-aided design/computer-assisted manufacture (CAD/CAM) technology. This study is a systematic review outlining long-term clinical survival rates of single-tooth restorations fabricated with CAD/CAM technology with a minimum follow-up of 3 years...
July 2018: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29889699/characterization-of-ivoclar-vivadent-dental-restoration-material-for-137cs-retrospective-radiation-dosimetry
#6
Steven T Ratliff, Kawsu Barry
Retrospective dosimetry is the method of using materials on or near a person who is exposed to ionizing radiation to determine the amount of radiation received by the person. A possible candidate material for retrospective dosimetry is Ivoclar Vivadent IPS e.max® CAD ceramic dental restoration material, which exhibits radiation-induced thermoluminescence when exposed to gamma- and x-ray radiation from a Cs source. The purpose of this paper is to characterize the material and study the behavior of the thermoluminescence signal with radiation dose and with delay time between radiation exposure and thermoluminescence measurement...
June 8, 2018: Health Physics
https://www.readbyqxmd.com/read/29888347/the-challenge-of-managing-patients-with-generalized-short-root-anomaly-a-case-report
#7
Dimitrios Michelogiannakis, Heleni Vastardis, Ioannis Melakopoulos, Chrysanthy Papathanasopoulou, Konstantinos I Tosios
The case of an 18-year-old woman with generalized short root anomaly (SRA) is presented, and the clinical management and challenges associated with this rare condition are discussed. The patient was referred for restoration of the edentulous maxillary left anterior region. Due to the SRA, the patient had previously received limited orthodontic treatment for the ectopic maxillary canines. The maxillary left canine failed during orthodontic traction, the left lateral incisor migrated in its region and had poor prognosis due to severe mobility...
June 8, 2018: Quintessence International
https://www.readbyqxmd.com/read/29885190/staged-dental-extraction-and-three-interim-prostheses-for-implants-based-rehabilitation-in-a-periodontally-compromised-subject
#8
Farhan Raza Khan, Rabia Ali
Studies have shown that the presence of advanced periodontal disease lowers the success of dental implants. The recommended approach for such cases is the delayed placement and delayed loading of implants. The present paper reports a case of a subject who presented with severe periodontally compromised dentition. Placement and early loading of 12 implants was done using a staged approach. Three different sets of fixed-type dental prostheses were employed in the interim period. The final prostheses were cement retained metallo-ceramic fixed bridge...
May 2018: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/29849967/influence-of-different-restorative-materials-on-the-stress-distribution-in-dental-implants
#9
Carlos-Eduardo Datte, João-Paulo-Mendes Tribst, Amanda-Maria-de Oliveira Dal Piva, Renato-Sussumu Nishioka, Marco-Antonio Bottino, Alexandre-Duarte M Evangelhista, Fabrício M de M Monteiro, Alexandre-Luiz-Souto Borges
Background: To assist clinicians in deciding the most suitable restorative materials to be used in the crowns and abutment in implant rehabilitation. Material and Methods: For finite element analysis (FEA), a regular morse taper implant was created using a computer aided design software. The implant was inserted at the bone model with 3 mm of exposed threads. An anatomic prosthesis representing a first maxillary molar was modeled and cemented on the solid abutment...
May 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29807060/10-year-randomized-trial-rct-of-zirconia-ceramic-and-metal-ceramic-fixed-dental-prostheses
#10
Irena Sailer, Marc Balmer, Jürg Hüsler, Christoph Hans Franz Hämmerle, Sarah Känel, Daniel Stefan Thoma
OBJECTIVES: to monitor zirconia-ceramic and metal-ceramic posterior FDPs with respect to survival and technical/biological complication rates. MATERIALS AND METHODS: Fifty-eight patients received 76 3- to 5-unit posterior FDPs. The sites were randomly assigned to 40 zirconia-based (ZC) and 36 metal-based (MC) FDPs. FDPs were examined at baseline (cementation), at 6 months, at 1 year and then yearly up to 10 years. Technical outcomes were assessed using modified United States Public Health Service (USPHS) criteria...
May 25, 2018: Journal of Dentistry
https://www.readbyqxmd.com/read/29806663/immediately-loaded-zygomatic-implants-vs-conventional-dental-implants-in-augmented-atrophic-maxillae-1-year-post-loading-results-from-a-multicentre-randomised-controlled-trial
#11
Rubén Davó, Pietro Felice, Roberto Pistilli, Carlo Barausse, Carlos Marti-Pages, Ada Ferrer-Fuertes, Daniela Rita Ippolito, Marco Esposito
PURPOSE: To compare the clinical outcome of immediately loaded cross-arch maxillary prostheses supported by zygomatic implants vs conventional implants placed in augmented bone. MATERIALS AND METHODS: In total, 71 edentulous patients with severely atrophic maxillas without sufficient bone volumes for placing dental implants, or when it was possible to place only two implants in the anterior area (minimal diameter 3.5 mm and length of 8 mm) and less than 4 mm of bone height subantrally, were randomised according to a parallel group design to receive zygomatic implants (35 patients) to be loaded immediately vs grafting with a xenograft, followed after 6 months of graft consolidation by placement of six to eight conventional dental implants submerged for 4 months (36 patients)...
2018: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/29801196/color-aspect-of-monolithic-zirconia-restorations-a-review-of-the-literature
#12
REVIEW
Farhad Tabatabaian
Monolithic zirconia restoration is an acceptable treatment option in restorative dentistry and a developing trend in esthetic dentistry. Digital dentistry has simplified fabrication of monolithic zirconia restorations. Zirconia ceramic has introduced an opportunity to achieve both esthetic and mechanical requirements for restorations. This is rarely found for a ceramic in dentistry. Monolithic zirconia restorations represent an acceptable durability, comparable to metal-ceramic restorations, while they are superior to metal-ceramic restorations esthetically; however, difficulties to gain an optimal shade reproduction and a color match with monolithic zirconia restorations still remain...
May 25, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29797383/evaluating-the-efficiency-of-the-dental-teacher-system-as-a-digital-preclinical-teaching-tool
#13
Z A Nagy, B Simon, Z Tóth, J Vág
AIM: To investigate the use of a preparation evaluation system for enhancing the learning and performance of undergraduate dental students when cutting preparations. MATERIALS AND METHODS: Two groups of eighteen students each were randomly chosen from the fourth year of the dental programme. The task chosen for this study was to make a cavity in preparation for a mesio-occlusal ceramic onlay in a plastic tooth. The dimensions of the cavity were defined, and 2 burs of known size were used for preparation...
May 23, 2018: European Journal of Dental Education: Official Journal of the Association for Dental Education in Europe
https://www.readbyqxmd.com/read/29793793/mechanical-behavior-of-cad-cam-occlusal-ceramic-reconstruction-assessed-by-digital-color-holography
#14
H Xia, P Picart, S Montresor, R Guo, J C Li, O Yusuf Solieman, J-C Durand, M Fages
OBJECTIVES: CAD/CAM ceramic occlusal veneers are increasingly used as therapeutic options. However, little is known about their mechanical behavior under stress, as the response of the prepared tooth that supports it. The aim of this article is to use for the first time 3D color holography to evaluate the behavior of a molar occlusal veneer under stress and the response of the prepared tooth. METHODS: The occlusal surface of a lower molar is prepared to receive a specific monolithic ceramic reconstruction manufactured with a chairside CAD/CAM system...
May 21, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
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
#15
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/29779182/locator%C3%A2-versus-ceramic-electroplated-double-crown-attachments-a-prospective-study-on-the-intraindividual-comparison-of-implant-supported-mandibular-prostheses
#16
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/29778127/study-of-two-body-wear-performance-of-dental-materials
#17
Xin Hu, Qian Zhang, Jia Ning, Wenmeng Wu, Changyi Li
INTRODUCTION: The purpose of this study was to evaluate the two-body wear resistances of natural enamel and four dental materials in vitro. METHODS: The testing machine was modified to form a type of pin-on-disk wear test apparatus. Four dental material specimens (Au-Pd alloy, Ag-Pd alloy, FiltekTMP60 and FiltekTMZ350 composite resins) and enamel were used as the pins, and a steatite ceramic grinding wheel was used as the abrasive counter face. The wear volume loss and the rigidity value was measured...
June 2018: Journal of the National Medical Association
https://www.readbyqxmd.com/read/29757470/sinus-augmentation-using-rhbmp-2-acs-in-a-mini-pig-model-influence-of-an-adjunctive-ceramic-bone-biomaterial
#18
Cristiano Susin, Jaebum Lee, Tiago Fiorini, Rubens Moreno de Freitas, Hsien-Chung Chiu, Hari S Prasad, Amanda N Buxton, Ulf Me Wikesjö
BACKGROUND: Recombinant human bone morphogenetic protein-2 in an absorbable collagen sponge carrier (rhBMP-2/ACS) has been shown to support significant bone formation when used to augment the maxillary sinus for implant dentistry. Nevertheless, bone biomaterials have been suggested to extend rhBMP-2/ACS with limited support of the merits of such approaches. OBJECTIVES: To evaluate local bone formation/dental implant osseointegration following implantation of rhBMP-2/ACS combined with a ceramic bone biomaterial using a mini-pig sinus augmentation model...
May 14, 2018: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/29750232/in-vitro-evaluation-of-bond-strength-of-four-self-etching-cements
#19
Julio Chávez-Lozada, Carmen Urquía-Morales
Indirect restorations need to be attached with adhesive luting agents to prevent them from becoming dislodged and provide adequate marginal sealing. The aim of this study was to evaluate bond strength to dentin of self-etching resin cements. MATERIALS AND METHODS: 75 flat dentin surfaces were randomly distributed among 5 groups, according to cements used; Group 1: RelyxU100 (3M/ESPE), Group 2: Bis Cem (Bisco), Group 3: Max Cem (Kerr), Group 4: SeT PP (SDI) and Group 5: Relyx ARC (3M/ESPE), control...
December 2017: Acta Odontológica Latinoamericana: AOL
https://www.readbyqxmd.com/read/29746449/effects-of-ceramic-density-and-sintering-temperature-on-the-mechanical-properties-of-a-novel-polymer-infiltrated-ceramic-network-zirconia-dental-restorative-filling-material
#20
Weiyan Li, Jian Sun
BACKGROUND Polymer-infiltrated ceramic-network (PICN) dental material is a new and practical development in orthodontics. Sintering is the process of forming a stable solid mass from a powder by heating without melting. The aim of this study was to evaluate the effects of sintering temperature on the mechanical properties of a PICN zirconia dental material. MATERIAL AND METHODS A dense zirconia ceramic and four PICN zirconia dental materials, with varying porosities, were sintered at three different temperatures; 12 PICN zirconia dental materials based on these porous ceramics were prepared, as well as a pure polymer...
May 10, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
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