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Zirconia abutment

Daniel S Thoma, Karin Wolleb, Stefan P Bienz, Daniel Wiedemeier, Christoph H F Hämmerle, Irena Sailer
OBJECTIVES: To assess the early histological, microbiological, radiological, and clinical response to cemented and screw-retained all-ceramic single-tooth implant-supported reconstructions. MATERIALS AND METHODS: Patients with single-tooth implants were randomly allocated to receive a cemented lithium disilicate crown on a customized zirconia abutment (CEM) or a screw-retained crown with a directly veneered zirconia abutment (SCREW). At the screening visit, at crown insertion and at the 6-month follow-up, clinical parameters were measured at the implant and the contralateral tooth...
September 20, 2018: Clinical Oral Implants Research
Christopher A Barwacz, Clark M Stanford, Ursula A Diehl, Lyndon F Cooper, Jocelyne Feine, Michael McGuire, E Todd Scheyer
PURPOSE: To evaluate the influence that three different implant-abutment interface designs had on peri-implant mucosal outcomes as assessed by the pink esthetic score (PES) 3 years after delayed implant placement and immediate provisionalization. MATERIALS AND METHODS: Adult subjects (n = 141) requiring replacement of a bounded single tooth in the anterior maxilla as well as first premolar sites were randomized to receive one of three unique implant-abutment interface designs (conical interface [CI]; flat-to-flat interface [FI]; or platform-switch interface [PS])...
September 2018: International Journal of Oral & Maxillofacial Implants
Gulcan Bahadirli, Suat Yilmaz, Tobie Jones, Deniz Sen
PURPOSE: The aim of this study was to analyze and compare the stress distribution patterns of different implant and restorative materials in the supporting tissue and implants. MATERIALS AND METHODS: Twelve different implant/bone models were created using SolidWorks 2015 software (SolidWorks Corp) and analyzed using the finite element method. Straumann Bone Level implants with zirconia abutments and single-piece Straumann PURE Ceramic implants (Institute Straumann) restored with lithium disilicate glass-ceramic and zirconia ceramic cement-retained crowns were evaluated...
September 2018: International Journal of Oral & Maxillofacial Implants
Andreas Zenthöfer, Stefan Rues, Johannes Krisam, Rainer Rustemeyer, Peter Rammelsberg, Marc Schmitter
PURPOSE: The forces needed to detach zirconia copings from titanium inserts of two-piece abutments were evaluated for implant platforms of different diameters (4.8 and 6.5 mm) and different luting strategies. MATERIALS AND METHODS: Eight specimens (four for each platform diameter) were prepared to simulate two-piece zirconia implant abutments with prefabricated titanium inserts and computer-aided design/computer-aided manufactured (CAD/CAM) zirconia copings. Half of the copings were luted to their titanium inserts by use of composite cement; the others were luted after additional bonding treatment of the titanium and zirconia surfaces...
September 2018: International Journal of Oral & Maxillofacial Implants
Diego da Cunha Fontoura, Vinicius de Magalhães Barros, Claúdia Silami de Magalhães, Ricardo Rodrigues Vaz, Allyson Nogueira Moreira
PURPOSE: This study compared the vertical misfit of fixed implant-supported titanium (Ti6Al4V) and yttria-stabilized tetragonal zirconia frameworks milled using the computer-aided design/computer-aided manufacturing (CAD/CAM) Zirkonzahn system. MATERIALS AND METHODS: An aluminum mandibular master cast was used, and four analogs of the Regular CrossFit implant for straight multibase titanium alloy abutments (Institut Straumann) were fixed with self-curing acrylic resin in mandibular canine and second premolar tooth locations with the aid of a parallelometer...
September 2018: International Journal of Oral & Maxillofacial Implants
Gentaro Mori, Takafumi Kobayashi, Taichi Ito, Yasutomo Yajima
Sjögren's syndrome (SS), an autoimmune disorder, affects the exocrine glands, including the lacrimal and salivary glands. It is characterized by symptoms of dry eye and dry mouth. As secretion of saliva decreases, patients with SS experience rampant caries, pain in the oral mucosa, inflammation and hardening of the salivary glands, abnormal taste, dysphagia, and loss of teeth earlier than healthy individuals. A removable partial denture is often used as a prosthesis after tooth loss. Compromised salivary lubrication, however, can produce traumatic ulceration of the mucosa, making use of a removable prosthesis in SS patients painful...
2018: Bulletin of Tokyo Dental College
Ulku Tugba Kalyoncuoglu, Bengi Yilmaz, Serap Gungor Koc, Zafer Evis, Pembegul Uyar Arpaci, Gulay Kansu
BACKGROUND: For long-term success of dental implants, it is essential to maintain the health of the surrounding soft tissue barrier, which protects the bone-implant interface from the microorganisms. Although implants based on titanium and its alloys still dominate the dental implant market, alumina (Al2 O3 ) and zirconia (ZrO2 ) implant systems are widely used in the area. However, they provide smooth and bioinert surfaces in the transmucosal region, which poorly integrate with the surrounding tissues...
September 12, 2018: Clinical Implant Dentistry and related Research
María Rizo-Gorrita, Irene Luna-Oliva, María-Ángeles Serrera-Figallo, José-Luis Gutiérrez-Pérez, Daniel Torres-Lagares
New zirconia-reinforced lithium silicate ceramics (ZLS) could be a viable alternative to zirconium (Y-TZP) in the manufacture of implantological abutments-especially in aesthetic cases-due to its good mechanical, optical, and biocompatibility properties. Although there are several studies on the ZLS mechanical properties, there are no studies regarding proliferation, spreading, or cytomorphometry. We designed the present study which compares the surface, cellular proliferation, and cellular morphology between Y-TZP (Vita YZ® T [Vita Zahnfabrik (Postfach, Germany)]) and ZLS (Celtra® Duo [Degudent (Hanau-Wolfgang, Germany)])...
September 11, 2018: International Journal of Molecular Sciences
Se-Mok Oh, Jin-Wook Kim, So-Young Choi, Du-Hyeong Lee
The fibular free flap (FFF) approach is the preferred option for reconstruction of segmental mandibular deficiencies. Fixed dental prostheses are recommended for patients who have undergone FFF jaw surgery to improve quality of life, but treatment of these patients with an implant-supported prosthesis is challenging because of the thin bone and thick soft tissue in the fibula. This case history reports the use of a bone-level implant guide fabricated with a computer-aided system and milled customized long abutments for implant placement and prosthodontic procedures...
September 6, 2018: International Journal of Prosthodontics
Nasrin Esfahanizadeh, Seyedeh Pegah Mirmalek, Abbas Bahador, Hamidreza Daneshparvar, Nasrin Akhoundi, Maryam Pourhajibagher
The characteristics of prosthetic implant components, such as the type, material, and surface roughness of abutments, can affect biofilm formation. Since an ideal abutment surface for the reduction of bacterial adhesion has yet to be found, this in vitro study aimed to quantify biofilm formation on laser-treated titanium, zirconia, and titanium surfaces. Sterile titanium, zirconia, and laser-treated titanium discs were placed in sterile 48-well plates. Biofilm formation was induced by adding sterilized, unstimulated human saliva and suspensions of Porphyromonas gingivalis (Pg), Aggregatibacter actinomycetemcomitans (Aa), and Prevotella intermedia (Pi) to the wells...
September 2018: General Dentistry
Benedikt C Spies, Alexander Fross, Erik Adolfsson, Aimen Bagegni, Sam Doerken, Ralf-Joachim Kohal
OBJECTIVE: To investigate the long-term stability of a metal-free zirconia two-piece implant assembled with a carbon fiber-reinforced (CRF) screw by means of transformation propagation, potential changes in surface roughness, the gap size of the implant-abutment connection, and fracture load values. METHODS: In a combined procedure, two-piece implants made from alumina-toughened zirconia were dynamically loaded (107 cycles) and hydrothermally aged (85°, 60days)...
October 2018: Dental Materials: Official Publication of the Academy of Dental Materials
Farhad Tabatabaian, Alireza Jafari, Mahshid Namdari, Minoo Mahshid
STATEMENT OF PROBLEM: The effects of coping and veneer thickness on the color of zirconia-based restorations are unknown. PURPOSE: The purpose of this in vitro study was to evaluate the influence of coping and veneer thickness on the color of zirconia-based restorations on different implant abutment backgrounds and to define minimum coping and veneer thicknesses for the backgrounds investigated to achieve a target color. MATERIAL AND METHODS: Thirty zirconia disk specimens with thicknesses of 0...
August 20, 2018: Journal of Prosthetic Dentistry
Camila E P Silva, Simone Soares, Camila M Machado, Edmara T P Bergamo, Paulo G Coelho, Lukasz Witek, Ilana S Ramalho, Ernesto B B Jalkh, Estevam A Bonfante
PURPOSE: To evaluate Ti-Base abutment height and cement type on the retentiveness of zirconia-based restorations. MATERIAL AND METHODS: Four millimeter (tall) and 2.5-mm-height (short) abutments along with temporary (provisional), glass ionomer (Meron), self-adhesive (U200), and conventional resin cement (Ultimate) were evaluated using pull-out testing (n = 10 crowns/group). RESULTS: Tall and short abutments demonstrated similar retention for all within cement comparisons, except U200 (P = 0...
August 21, 2018: Implant Dentistry
Barbara Eisner, Nadja Naenni, Jürg Hüsler, Christoph Hämmerle, Daniel Thoma, Irena Sailer
This study aimed at evaluating the influence of veneering of the submucosal part of zirconia abutments on biologic, radiographic, technical, and esthetic outcomes in single-tooth implant sites. A total of 20 patients each received a zirconia abutment to support an all-ceramic implant-supported crown. Patients were randomly assigned to the test group (n = 10), in which the abutment was modified with pink veneering ceramic, or to a control group (n = 10) without further submucosal customization. Patients were followed up at baseline (after the insertion of the final reconstruction) and yearly thereafter...
September 2018: International Journal of Periodontics & Restorative Dentistry
Shareen H Elshiyab, Noor Nawafleh, Laurence Walsh, Roy George
AIM: The aim of the present study was to investigate fracture resistance of implant-supported zirconia-based crowns (monolayer vs bilayer) cemented to hybrid abutments. METHODS: Monolayer and bilayer zirconia crowns were constructed and cemented to zirconia hybrid abutments. Crowns were divided into two subgroups: (a) untreated control group; and (b) experimental group, which underwent thermal-cycling mechanical loading in a chewing simulator. Up to 1.2 million stress cycles with simultaneous thermocycling (5 and 55°C) were applied...
August 13, 2018: Journal of Investigative and Clinical Dentistry
Tingting Wang, Lina Wang, Qianqian Lu, Zhen Fan
STATEMENT OF PROBLEM: The grayish appearance of titanium abutments adversely affects peri-implant esthetics in patients with thin mucosa, impacting patient satisfaction with implant-supported restorations in esthetic regions. PURPOSE: The purpose of this in vitro study was to change the color of titanium alloys with anodic oxidation and to evaluate alterations in the esthetic, physical, and biological properties of the anodized titanium alloys. MATERIAL AND METHODS: Pink and yellow titanium alloys produced by anodization were the experimental groups, and the untreated titanium alloy and zirconia were used as the control groups...
August 7, 2018: Journal of Prosthetic Dentistry
Guilherme da Gama Ramos, Danilo Lazzari Ciotti, Samuel Rehder Wimmers Ferreira, Maide Rehder Wimmers Ferreira Margarido, Raquel Adriano Dantas, Marina Nottingham Guerreiro
In the past, aesthetics had a secondary role in implant rehabilitation. Nowadays, the search for a perfect and harmonious aesthetic has stimulated the development of new materials and techniques. Due to this aesthetic requirement, the hybrid abutment (titanium link + zirconia) emerged as an alternative to metallic pillars. The hybrid abutment made a more favorable aesthetic possible, provided reliable mechanical properties, and increased biocompatibility to the surrounding tissues. Additionally, the individual zirconia abutment improves the emergency profile and the final white aesthetics...
2018: Case Reports in Dentistry
Teresa Almeida Mendes, João Caramês, Luís Pires Lopes, Amílcar Lopes Ramalho
OBJECTIVE: Titanium is the most commonly used material to manufacture dental implants and abutments. Recently, zirconia abutments have been manufactured with better aesthetic properties. However, zirconia abutments are harder than titanium implants; therefore, they could wear the implant surface. Therefore, this article aims to describe a sphere-plane system that can be used to assess the wear that different abutment materials cause in the titanium of dental implants when submitted to cyclic loading...
July 31, 2018: BMC Research Notes
Matthias Rödiger, Janine Kloß, Nikolaus Gersdorff, Ralf Bürgers, Sven Rinke
This in vitro study evaluated the effects of different abutment axial heights on the retentiveness of adhesively and self-adhesively luted zirconia copings. Ankylos implants were embedded in resin blocks. Two groups of titanium abutments ("long", height: 6.79 mm, taper: 4.8°; "short", height: 4.31 mm, taper: 4.8°; Compartis-ISUS, DeguDent) were used for the luting of CAD/CAM-fabricated zirconia copings (Compartis, DeguDent) with an adhesive (Multilink Automix; Ivoclar Vivadent) and a self-adhesive (RelyX Unicem; 3M ESPE) composite...
November 2018: Journal of the Mechanical Behavior of Biomedical Materials
Peter Gehrke, Thorsten Sing, Carsten Fischer, Sebastian Spintzyk, Jürgen Geis-Gerstorfer
PURPOSE: Central manufacturing of two-piece computer-aided design/computer-aided manufacture (CAD/CAM) zirconia abutments may provide a higher accuracy of internal and external adaptation at the expense of delayed restoration delivery. The aim of this study was to compare the fit of two-part zirconia abutments that were either fabricated centrally with the DEDICAM system or at a local laboratory. The field of interest was the marginal, external, and internal luting gap between the titanium insert and CAD/CAM zirconia coping...
July 2018: International Journal of Oral & Maxillofacial Implants
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