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Zirconia abutment

George Fokas, Li Ma, Vasilios Chronopoulos, Martin Janda, Nikos Mattheos
STATEMENT OF PROBLEM: Evidence for micromorphology and precision of fit of third-party prosthetic components compared with the original manufacturer's components is lacking. PURPOSE: The purpose of this in vitro pilot study was to evaluate the micromorphological differences among different commercial brands of zirconia, titanium, and gold abutments for dental implants in terms of tight surface contact. MATERIAL AND METHODS: The following abutments (n=3 per type) were preloaded on Straumann Bone Level implants according to the manufacturer's instructions for zirconia (Zr, Zr2, Zr3), titanium (Ti and Ti2), and gold (Gold 1, Gold 2)...
July 10, 2018: Journal of Prosthetic Dentistry
Thalisson S O Silva, Alice R Freitas, Marília L L Pinheiro, Cássio do Nascimento, Evandro Watanabe, Rubens F Albuquerque
Dental implants and their prosthetic components are prone to bacterial colonization and biofilm formation. The use of materials that provides low microbial adhesion may reduce the prevalence and progression of peri-implant diseases. In view of the oral environment complexity and oral biofilm heterogeneity, microscopy techniques are needed that can enable a biofilm analysis of the surfaces of teeth and dental materials. This article describes a series of protocols implemented for comparing oral biofilm formation on titanium and ceramic materials for prosthetic abutments, as well as the methods involved in oral biofilms analyses at the morphological and cellular levels...
June 24, 2018: Journal of Visualized Experiments: JoVE
Mireia Haro Adánez, Hironobu Nishihara, Wael Att
PURPOSE: This systematic review evaluates the clinical outcome of zirconia implant-associated survival and success rates, marginal bone loss, and implant-restoration complex integrity. STUDY SELECTION: Using the preferred reporting items for systematic reviews and meta-analysis (PRISMA) guidelines, studies including ≥10 patients restored with zirconia implants supporting single crowns (SCs) or fixed dental prostheses (FDPs) prior to January 2017 were identified...
July 5, 2018: Journal of Prosthodontic Research
S J Zhang, J Y Zeng, J Li, R Zhang, J Y Yin, H Wang
Objective: To provide a reference for a suitable alternative treatment choice for implant-supported prostheses, and to explore the influence of 3 types of prosthetic material on the stress distribution around implant. Methods: The implant-abutment analogs were embedded individually into photoelastic resin blocks, which were medical pure titanium castings reproducing the surface and outline of implant (diameter 4.3 mm, length 11.5 mm) and esthetic abutment (regular profile, 1 mm). The prostheses were divided into 3 groups according to the type of prosthetic material...
January 9, 2018: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
Yu Tsuyuki, Toru Sato, Syuntaro Nomoto, Mamoru Yotsuya, Teruyoshi Koshihara, Shinji Takemoto, Masao Yoshinari
The aim of this study was to investigate the effects of occlusal form of abutment, occlusal thickness of monolithic zirconia crowns (MZC), and cement type on the fracture load of MZC. Abutments were prepared with 2 types of occlusal forms: groove-type and flat-type. These were designed so that thickness at the central fissure region of MZC was 0.3, 0.5, or 0.7 mm. Glass ionomer cement and resin cement were used to lute MZC to their corresponding abutment. Fracture load was determined using a universal testing machine...
June 29, 2018: Dental Materials Journal
Adolfo Coelho de Oliveira Lopes, Camila Moreira Machado, Leonardo Rigoldi Bonjardim, Edmara Tatiely Pedroso Bergamo, Ilana Santos Ramalho, Lukasz Witek, Paulo Guilherme Coelho, Estevam Augusto Bonfante
PURPOSE: To evaluate the pullout resistance of CAD/CAM implant-supported crowns cemented with provisional and definitive cements on Ti-base implant abutments. MATERIALS AND METHODS: Sixty crowns were milled for use in Ti-base implant abutments and divided (n = 15/group) according to material, as follows: (a) [Pr] Temporary acrylic resin; (b) [Co-Cr] Cobalt-Chromium alloy; (c) [Zr] polycrystalline zirconia; and (d) [Ti] titanium. The cementation was performed with RelyX Temp NE (RxT) cement or RelyX U200 self-etching resin cement, under a 50 N (5 kg) load for 10 minutes...
July 2, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Eun-Suk Lee, Yoon-Hyuk Huh, Chan-Jin Park, Lee-Ra Cho
STATEMENT OF PROBLEM: Zirconia prostheses show a high rate of retention loss, and more information is needed regarding the treatment of the intaglios of zirconia prostheses to improve the bond strength between zirconia and resin cement. PURPOSE: The purpose of this in vitro study was to evaluate the retention of titanium abutments and zirconia prostheses treated with silica-containing glass-ceramic liners. The effect of the abutment convergence angle on retention force was also examined...
June 28, 2018: Journal of Prosthetic Dentistry
Ignacio Sanz-Sánchez, Ignacio Sanz-Martín, Ana Carrillo de Albornoz, Elena Figuero, Mariano Sanz
OBJECTIVES: The primary aim of this systematic review was to evaluate the available evidence on the effect of the abutment material on the stability and health of the peri-implant hard tissues. METHODS: A protocol was developed to answer the following focused question: "Which is the effect of the abutment material on stability and health of the peri-implant hard tissues?" Randomized controlled trials (RCTs), controlled clinical trials (CCTs) or prospective case series (CS) with at least 6 months of follow-up were included, and meta-analyses were performed to compare abutment materials vs...
June 15, 2018: Clinical Oral Implants Research
Achim Sprenger, Kristupas Gutauskas, Andreas Filippi, Martin Rosentritt, Sebastian Kühl
PURPOSE: To evaluate whether removing a fractured abutment screw with a specific rescue device negatively affects the success of a new restoration in terms of early abutment loosening. MATERIALS AND METHODS: Implants (n = 10) with a regular platform of 4.1 mm (tissue level [TL]) and implants (n = 10) with a reduced diameter of 3.3 mm (bone level [BL]) were used. The screws of eight respective abutments for both implant types were artificially weakened in order to fracture during torque application for abutment insertion...
June 12, 2018: International Journal of Oral & Maxillofacial Implants
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
Andrea Lennartz, Andrea Dohmen, Shaza Bishti, Horst Fischer, Stefan Wolfart
STATEMENT OF PROBLEM: Retrievability of implant-supported restorations is important. Data are lacking for cemented zirconia crowns on zirconia abutments. PURPOSE: The purpose of this in vitro study was to investigate the influence of different cements and marginal discrepancy on the retrievability of implant-supported zirconia crowns. Furthermore, the influence of thermocycling on retrievability was evaluated. MATERIAL AND METHODS: Thirty tapered Camlog zirconia abutments (6-degree taper, 6×4...
May 25, 2018: Journal of Prosthetic Dentistry
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
S Ghodsi, Z Jafarian
INTRODUCTION: Zirconia is suggested in many clinical situations due to acceptable biocompatibility, lower price compared with gold restorations, and better appearance than traditional metal ceramic restorations. New translucent monolithic zirconia has been developed to merge strength with improved tooth-colour matching. This work aims to review relevant articles on new translucent zirconia restorative materials. METHODS: The published articles on translucent zirconia were searched through PubMed, Medline, Google scholar, and indexed journals using the following keywords: translucent zirconia, transparent zirconia, and tooth colored zirconia...
May 30, 2018: European Journal of Prosthodontics and Restorative Dentistry
Yushu Liu, Hongqiang Ye, Yong Wang, Yijao Zhao, Yuchun Sun, Yongsheng Zhou
PURPOSE: To evaluate the internal adaptations of cast crowns made from resin patterns produced using three different computer-aided design/computer-assisted manufacturing technologies. MATERIALS AND METHODS: A full-crown abutment made of zirconia was digitized using an intraoral scanner, and the design of the crown was finished on the digital model. Resin patterns were fabricated using a fused deposition modeling (FDM) 3D printer (LT group), a digital light projection (DLP) 3D printer (EV group), or a five-axis milling machine (ZT group)...
July 2018: International Journal of Prosthodontics
Pauliina Moilanen, Jenni Hjerppe, Lippo Lassila, Timo Närhi
OBJECTIVES: To examine fracture strength and precision of fit of screw-retained anterior monolithic zirconia crowns made directly on implants or by cementing on prefabricated titanium bases, and to compare these to industrially produced Procera crowns. . MATERIALS AND METHODS: Monolithic screw-retained implant crowns were produced by CAD/CAM method (Zirkonzahn, Italy) using either partially (PSZ, Prettau, Zirconzahn, Italy) or fully stabilized (FSZ, Prettau Anterior, Zirkonzahn) zirconia...
May 15, 2018: Journal of Oral Implantology
Camilo Andres Villabona, Marco Antônio Amorin Vasco, Edwin Ruales, Karin Apaza Bedoya, Cesar Magalhães Benfatti, Osvaldo Luis Bezzon, Tatiana Miranda Deliberador
Zirconia has been presented as an alternative biomaterial to titanium, commercially presented as a single body implant and / or as an abutment, demonstrating clinically biocompatible favorable results in white and rose aesthetics, However, the amount of long-term in-vivo studies and mechanical tests evaluating the response of stress distribution compared with titanium implants are still limited. The aim of the study was to compare by the finite element method, the principal stresses peaks in the peri implantar bone around titanium and zirconia implants...
May 15, 2018: Journal of Oral Implantology
Monize Carelli Felipe Antunes, Jean Soares Miranda, Ronaldo Luís Almeida de Carvalho, Rodrigo Furtado de Carvalho, Estevão Tomomitsu Kimpara, Rodrigo Othávio de Assunção E Souza, Fabíola Pessôa Pereira Leite
To evaluate the effect of different surface treatments on the marginal misfit and retentive strength between Y-TZP crowns and an epoxy resin. Forty (40) epoxy resin (G10) abutments (height: 5mm, conicity: 60, finish line: large chamfer) with equal dimensions were milled and included in polyurethane to simulate the periodontal ligament. Next, 40 Y-TZP crowns (thickness: 1mm) were milled (Cerec in Lab) and randomly divided into four groups (n=10) according to the surface treatment: GS(glaze spray), GP(glaze powder/liquid), P(zirconia primer) and RS(tribochemical silica coating)...
2018: Brazilian Oral Research
Izabela Cristina Maurício Moris, Yung-Chung Chen, Adriana Cláudia Lapria Faria, Ricardo Faria Ribeiro, Alex Sui-Lun Fok, Renata Cristina Silveira Rodrigues
OBJECTIVE: This study aimed to evaluate the fracture load and pattern of customized and non-customized zirconia abutments with Morse-taper connection. METHODS: 18 implants were divided into 3 groups according to the abutments used: Zr - with non-customized zirconia abutments; Zrc - with customized zirconia abutments; and Ti - with titanium abutments. To test their load capacity, a universal test machine with a 500-kgf load cell and a 0.5-mm/min speed were used. After, one implant-abutment assembly from each group was analyzed by Scanning Electron Microscopy (SEM)...
May 5, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
Romina Brignardello-Petersen
No abstract text is available yet for this article.
April 30, 2018: Journal of the American Dental Association
Elie E Daou, Hani Ounsi, Mutlu Özcan, Nadin Al-Haj Husain, Ziad Salameh
STATEMENT OF PROBLEM: Limited information is available on the precision of new metal processing technologies. PURPOSE: The purpose of this in vitro study was to evaluate the marginal and internal fit of pre-sintered cobalt-chromium (Co-Cr) and zirconia 3-unit fixed dental prostheses using x-ray microcomputed tomography. MATERIAL AND METHODS: Three-unit fixed dental prostheses were prepared on metal dies (N=12) using a typodont model from the maxillary first premolar to the first molar...
April 30, 2018: Journal of Prosthetic Dentistry
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