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Zirconia abutment

Stephanie Zeller, David Guichet, Elias Kontogiorgos, William W Nagy
STATEMENT OF PROBLEM: The accuracy of a full digital workflow using an Atlantis abutment and a milled zirconia crown; a full digital workflow with a 3Shape split-file workflow using a zirconia abutment and crown; and an interrupted digital workflow using an Atlantis abutment and a milled zirconia crown is unclear. PURPOSE: The purpose of this in vitro study was to compare 2 full digital workflows relative to an interrupted workflow for restoring an implant with a custom abutment and crown...
November 2, 2018: Journal of Prosthetic Dentistry
Goran I Benic, Irena Sailer, Marco Zeltner, Janine N Gütermann, Mutlu Özcan, Sven Mühlemann
STATEMENT OF PROBLEM: Trials comparing the overall performances of digital and conventional workflows in restorative dentistry are lacking. PURPOSE: The purpose of the third part of this clinical study was to test whether the fit of zirconia 3-unit frameworks for fixed partial dentures fabricated with fully digital workflows differed from that of metal frameworks fabricated with the conventional workflow. MATERIAL AND METHODS: In each of 10 participants, 4 fixed-partial-denture frameworks were fabricated for the same abutment teeth according to a randomly generated sequence...
November 2, 2018: Journal of Prosthetic Dentistry
Todd R Schoenbaum, Gary S Solnit, Sam Alawie, Steven J Sadowsky
This clinical report describes a patient with an osseointegrated implant and definitive restoration of the maxillary right lateral incisor who was seeking resolution of the recession of the peri-implant tissues which revealed the underlying zirconia abutment. The patient had previously received a connective tissue graft in an unsuccessful attempt to resolve the recession. An undercontoured interim restoration that allowed for soft tissue coronal migration resolved the soft tissue deficiency.
October 31, 2018: Journal of Prosthetic Dentistry
Sung-Jun Kim, KeunBaDa Son, Kyu-Bok Lee
PURPOSE: To measure axial displacement of different implant-abutment connection types and materials during screw tightening at the recommended torque by using a contact scanner for two-dimensional (2D) and three-dimensional (3D) analyses. MATERIALS AND METHODS: Twenty models of missing mandibular left second premolars were 3D-printed and implant fixtures were placed at the same position by using a surgical guide. External and internal fixtures were used. Three implant-abutment internal connection (INT) types and one implant-abutment external connection (EXT) type were prepared...
October 2018: Journal of Advanced Prosthodontics
Kyu-Hyung Choi, KeunBaDa Son, Du-Hyeong Lee, Kyu-Bok Lee
PURPOSE: Cement-retained implant prostheses can lack proper retrievability during repair, and residual cement can cause peri-implantitis. The purpose of this in vitro study was to evaluate the influence of abutment height and convergence angle on the retrievability of cement-retained implant prostheses with lingual slots, known as retrievable cement-type slots (RCS). MATERIALS AND METHODS: We fabricated six types of titanium abutments (10 of each type) with two different heights (4 mm and 6 mm), three different convergence angles (8°, 10°, and 12°), a sloped shoulder margin (0...
October 2018: Journal of Advanced Prosthodontics
Eun-Hye Jo, Yoon-Hyuk Huh, Kyung-Ho Ko, Chan-Jin Park, Lee-Ra Cho
PURPOSE: The effect of silica-based glass-ceramic liners on the tensile bond strength between zirconia and resin-based luting agent was evaluated and compared with the effect of 10-methacryloyloxydecyl dihydrogen phosphate (MDP)-containing primers. MATERIALS AND METHODS: Titanium abutments and zirconia crowns (n = 60) were fabricated, and the adhesive surfaces of the specimens were treated by airborne-particle abrasion. The specimens were divided into 5 groups based on surface treatment: a control group, 2 primer groups (MP: Monobond Plus; ZP: Z Prime Plus), and 2 liner groups (PL: P-containing Liner; PFL: P-free Liner)...
October 2018: Journal of Advanced Prosthodontics
Marco Tallarico, Marco Caneva, Nicola Baldini, Fulvio Gatti, Marco Duvina, Mauro Billi, Gaetano Iannello, Giacomo Piacentini, Silvio Mario Meloni, Marco Cicciù
The aim of this consensus conference was to provide clinical guidelines, based on the available evidence and on the author's daily practice and experience, for general dentistry and dental practitioners to allow them to delivery long-term successful restorations. Three groups of expert clinicians and dental technicians were invited to evaluate all of the scientific literature from 1967 up to March 2017 to identify relevant studies on assigned topics and to prepare in advance narrative/systematic review, written according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, to fulfill the consensus statement criteria...
October 2018: European Journal of Dentistry
Tarek Q Qasim, Billal M El-Masoud, Ahmed M Abu Laban
Objective: Prosthetic molar crowns in service are subjected to chewing loads, which cause a shift or dislodgment. The objective of this study is to investigate whether the addition of resistance grooves to the proximal surfaces of the abutment teeth would enhance the fracture resistance of the zirconia crowns and to compare between the patterns of cracks development on the zirconia crowns after the application of mono loading versus cyclic loading forces. Materials and Methods: Thirty-six all-ceramic zirconia cored crowns were prepared on the same abutment...
October 2018: European Journal of Dentistry
Daniel S Thoma, Irena Sailer, Sven Mühlemann, Alfonso Gil, Ronald E Jung, Christoph H F Hämmerle
OBJECTIVES: To analyze the effect of veneering of the submucosal part of zirconia abutments and the type of retention (cemented vs screw-retained) on clinical, microbiological, and histological outcomes of single-tooth implant crowns. MATERIAL AND METHODS: A total of 44 patients with a single missing tooth to be replaced by an implant in the anterior region participated in the study. Implants were randomly assigned to receive zirconia-based CAD/CAM reconstructions using either one of four treatment modalities: cement-retained with submucosal veneering (CR-P), cement-retained without submucosal veneering (CR-W), screw-retained with submucosal veneering (SR-P), and screw-retained without submucosal veneering (SR-W)...
October 17, 2018: Clinical Implant Dentistry and related Research
Jaafar Abduo, Ling Yin
PURPOSE: The aim of this systematic review and meta-analyses was to evaluate fits of zirconia custom abutments and frameworks on implants and to identify the factors that influence their fits. MATERIALS AND METHODS: An electronic search was conducted through PubMed (MEDLINE), Google Scholar, and Cochrane Central Registrar of Controlled Trials. The search was completed in August 2017. Series of meta-analyses were conducted to compare fits of zirconia custom abutments and frameworks on implants with metal abutments and frameworks...
October 3, 2018: International Journal of Oral & Maxillofacial Implants
Guido Sterzenbach, Martin Rosentritt, Hendrik Meyer-Lueckel, Kerstin Bitter, Michael Naumann
The influence of a fiber post-restored abutment tooth on the load capability of a three-unit zirconia framework cantilever fixed dental prosthesis (cFDP) was evaluated after simulated clinical function. Human lower sound premolars (n = 64) were distributed, in equal numbers, to four experimental groups: two vital abutment teeth (group I; control); mesial abutment tooth post-restored (group II); distal abutment tooth post-restored (group III); and mesial and distal abutment teeth post-restored (group IV). All specimens received an adhesively luted three-unit cFDP of veneered zirconia...
October 1, 2018: European Journal of Oral Sciences
Wesley F Vasques, Felipe V Martins, José Carlos Magalhães, Edgard M Fonseca
OBJECTIVE: The beneficial mechanical properties of zirconia, together with the adhesive techniques, provide a wide range of clinical applications, including the construction of thin structures and minimally invasive adhesive restorations. CLINICAL CONSIDERATIONS: A periodontal disease-related missing maxillary central incisor, in a pregnant patient with chronic periodontal disease in the first trimester of pregnancy, and with type II diabetes treated with resin-bonded fixed partial denture using the missing tooth cemented to a zirconia framework and then bonded to the abutment teeth...
September 29, 2018: Journal of Esthetic and Restorative Dentistry
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
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