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Zirconia abutment

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https://www.readbyqxmd.com/read/29153749/esthetic-abutment-design-for-angulated-screw-channels-a-technical-report
#1
Satoshi Sakamoto, Munehiko Ro, Aladdin Al Ardah, Charles Goodacre
Angulated screw channel system abutments (ASCs) have recently been introduced to address the problem with visible screw access that may compromise esthetics. ASCs allow the screw access to be modified up to 25 degrees relative to the implant axis. However, a widened channel, which may cause thinning of the facial ceramic, is needed at the implant screw head to allow for proper engagement of the screwdriver. This technical report introduces a custom titanium insert design, the Satoshi Sakamoto (SS) abutment...
November 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29140369/wear-at-the-implant-abutment-interface-of-zirconia-abutments-manufactured-by-three-cad-cam-systems
#2
Ana Luiza Pinheiro Tannure, Alfredo Gonçalves Cunha, Luiz Antônio Borges Junior, Laís Regiane da Silva Concílio, Ana Christina Claro Neves
PURPOSE: To evaluate the changes in the external-hexagon surface of the titanium (Ti) implant before and after mechanical cycling, when coupled with zirconia (Zr) abutments (A) manufactured by three computer-aided design/computer-aided manufacturing (CAD/CAM) systems (Neodent Digital, Zirkonzahn, and AmannGirrbach) and the ZrTi abutment manufactured by Neodent. MATERIALS AND METHODS: Four groups were formed (n = 6): titanium implant with Zr AmannGirrbach abutment (AZrAG), with Zr Zirkonzahn abutment (AZrZ), with Zr Neodent abutment (AZrN), and with Zr abutment with infrastructure in Ti Neodent (AZrTiN)...
November 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29128350/biomechanical-behavior-of-adhesive-cement-layer-and-periodontal-tissues-on-the-restored-teeth-with-zirconia-rbfdps-using-three-kinds-of-framework-design-3d-fea-study
#3
Ayana Uraba, Reina Nemoto, Kosuke Nozaki, Tasuku Inagaki, Satoshi Omori, Hiroyuki Miura
PURPOSE: To investigate stress and strain concentrations on resin-bonded fixed dental prostheses (RBFDPs) frameworks of different design using finite element analysis. METHODS: A human dry skull was scanned and models were produced using three-dimensional printer. After abutment preparation, three frameworks, including a three-unit RBFDP, and two-unit cantilevered RBFDPs using #21 and #23 for the abutment tooth, were fabricated. Scanned data were subtracted to define boundary of each structure...
November 8, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/29081448/the-effective-design-of-zirconia-coping-on-titanium-base-in-dental-implant-superstructure
#4
Maiko Mieda, Ikiru Atsuta, Yasuyuki Matsushita, Takehiro Morita, Yasunori Ayukawa, Yoshihiro Tsukiyama, Yoshinori Sawae, Kiyoshi Koyano
Zirconia exhibits good tissue compatibility and nontoxicity, making it a widely used esthetic replacement material for implant abutments. To avoid abutment-fracture, the parts composed of zirconia with a bonded metal component connected to the implant can be used. The purpose of this study was to design titanium and zirconia components with high fracture resistance at the zirconia component's edge line. Three edge line designs of the titanium base and zirconia sleeve were made: chamfer, shoulder, and backtaper...
October 27, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/29072346/effects-of-modified-abutment-characteristics-on-peri-implant-soft-tissue-health-a-systematic-review-and-meta-analysis
#5
REVIEW
Ignacio Sanz-Martín, Ignacio Sanz-Sánchez, Ana Carrillo de Albornoz, Elena Figuero, Mariano Sanz
OBJECTIVES: The purpose of this systematic review was to evaluate the impact of the abutment characteristics on peri-implant tissue health and to identify the most suitable material and surface characteristics. METHODS: A protocol was developed aimed to answer the following focused question: "Which is the effect of the modification of the abutment design in regard to the maintenance of the peri-implant soft tissue health?" Further subanalysis aimed to investigate the impact of the abutment material, macroscopic design, surface topography and surface manipulation...
October 26, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29039637/peri-implant-soft-tissue-augmentation-in-a-mild-smoker-a-surgical-prosthetic-approach-using-a-subepithelial-ct-graft-with-coronal-anchoring-sutures-and-a-zirconia-abutment
#6
Neel Bhatavadekar, Bhakti Tunkiwala, Aliasger Tunkiwala
This report presents the use of a CT graft to augment the periimplant soft tissue at time of abutment placement in a smoker using coronal anchoring sutures around a zirconia abutment. Soft tissue augmentation at the time of abutment connection, avoiding abutment removal after CT grafting, use of a zirconia abutment and placement of coronal anchoring sutures might be the recommended approach when dealing with such esthetic challenges.
November 2016: Journal of the California Dental Association
https://www.readbyqxmd.com/read/29034578/a-prospective-split-mouth-study-comparing-tilted-implants-with-angulated-connection-versus-conventional-implants-with-angulated-abutment
#7
Manú Van Weehaeghe, Hugo De Bruyn, Stefan Vandeweghe
BACKGROUND: An angulation of the implant connection could overcome the problems related to angulated abutments. PURPOSE: This study compares conventional implants with angulated abutment to tilted implants with an angulated connection. MATERIALS AND METHODS: Twenty patients were treated in the edentulous mandible. In the posterior jaw locations, one conventional tilted implant with angulated abutment and one angulated implant without abutment were placed...
October 16, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29028849/the-effect-of-resin-cement-type-and-thermomechanical-aging-on-the-retentive-strength-of-custom-zirconia-abutments-bonded-to-titanium-inserts
#8
Merve Bankoğlu Gu Ngör
PURPOSE: The purpose of this study was to investigate the effect of resin cement type on the retentive strength of custom zirconia abutments bonded to titanium inserts. MATERIALS AND METHODS: Sixty implant (4.3 mm diameter and 11.5 mm length) and custom zirconia abutment (15 mm height and 2 mm wall thickness) pairs were used to form six groups (n = 10 each). Three different resin cements were used to bond the zirconia abutments and titanium inserts: Panavia F 2...
October 13, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28989130/evaluation-of-the-sealing-capability-of-the-internal-conical-connections-of-implants-with-titanium-and-zirconia-abutments
#9
Damian L Black, Ilser Turkyilmaz, Wen Lien, Chol H Chong
AIM: The purpose of this in vitro investigation was to evaluate the sealing capability of the conical implant-abutment interfaces under different abutment screw torque values using titanium and zirconia abutments with Morse taper designs. MATERIALS AND METHODS: A total of 42 dental implants (n = 21 for titanium abutments and n = 21 for zirconia abutments) were inoculated internally with three bacteria. These assemblies were divided into four test groups (n = 10) based on screw fixation torques of 35 or 20 Ncm and placed in sterile broth; the remaining abutments were used as positive controls and torqued to 10 Ncm...
October 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28945668/compressive-resistances-and-failure-modes-of-abutments-with-different-transgingival-heights-and-types-on-internal-conical-connected-implants
#10
Chenyuan Zhu, Fuqiang Zhang, Ting Jiao
PURPOSE: This study aimed to research the effect of different transgingival heights (THs) and types of abutments on performances including the compressive resistances and fracture modes of abutments on internal conical connected implants. MATERIALS AND METHODS: Three groups were established: a 1-piece zirconia abutment group (group A), a 2-piece zirconia abutment group (group B), and a 1-piece titanium abutment group (group C). Three THs (2, 3.5, and 5 mm, n = 6) were set as the subgroups of each group...
October 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28939084/dimensional-changes-from-the-sintering-process-and-fit-of-y-tzp-copings-micro-ct-analysis
#11
Carlos Eduardo Edwards Rezende, Ana Flávia Sanches Borges, Rander Moreira Macedo, José Henrique Rubo, Jason Alan Griggs
OBJECTIVE: To evaluate the dimensional changes from the sintering process of Y-TZP and relate them to the fit of zirconia copings. METHODS: The sintering shrinkage rate (SSR) was obtained from the measurement of geometric specimens (4×4×2mm). Thirty-six zirconia copings made using CAD/CAM were equally divided into three groups (n=12): ZMAX - IPS e.max ZirCAD (Ivoclar Vivadent, Liechtenstein); ZYZ - InCeram YZ (Vita Zahnfabrik, Germany); and ZK - Zirklein (Zirklein, Brazil)...
November 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28923546/influence-of-implant-abutment-material-and-ceramic-thickness-on-optical-properties
#12
Bundhit Jirajariyavej, Peeraphorn Wanapirom, Chuchai Anunmana
STATEMENT OF PROBLEM: Anterior shade matching is an essential factor influencing the esthetics of a ceramic restoration. Dentists face a challenge when the color of an implant abutment creates an unsatisfactory match with the ceramic restoration or neighboring teeth. PURPOSE: The purpose of this in vitro study was to evaluate the influence of abutment material and ceramic thickness on the final color of different ceramic systems. MATERIAL AND METHODS: Four experimental and control ceramic specimens in shade A3 were cut from IPS e...
September 16, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28888428/displacement-comparison-of-cad-cam-titanium-and-zirconia-abutments-to-implants-with-different-conical-connections
#13
Burak Yilmaz, Shervin Hashemzadeh, Jeremy D Seidt, Nancy L Clelland
PURPOSE: To compare the displacements of CAD-CAM zirconia and titanium abutments into different internal connection systems after torquing. METHODS: OsseoSpeed EV and OsseoSpeed TX implants (n=10) were placed in resin blocks. Zirconia and titanium abutments (n=5) were first hand tightened and then tightened to the recommended torque (20Ncm for TX and 25Ncm for EV). Displacements of abutments between screw tightening by hand and torque driver was measured using three-dimensional digital image correlation (3D DIC) technique...
September 6, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28874994/comparison-of-fit-accuracy-and-torque-maintenance-of-zirconia-and-titanium-abutments-for-internal-tri-channel-and-external-hex-implant-connections
#14
Hakimeh Siadat, Elaheh Beyabanaki, Niloufar Mousavi, Marzieh Alikhasi
PURPOSE: This in vitro study aimed to evaluate the effect of implant connection design (external vs. internal) on the fit discrepancy and torque loss of zirconia and titanium abutments. MATERIALS AND METHODS: Two regular platform dental implants, one with external connection (Brånemark, Nobel Biocare AB) and the other with internal connection (Noble Replace, Nobel Biocare AB), were selected. Seven titanium and seven customized zirconia abutments were used for each connection design...
August 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/28874990/in-vitro-study-of-the-fracture-resistance-of-monolithic-lithium-disilicate-monolithic-zirconia-and-lithium-disilicate-pressed-on-zirconia-for-three-unit-fixed-dental-prostheses
#15
Jae-Won Choi, So-Yeun Kim, Ji-Hyeon Bae, Eun-Bin Bae, Jung-Bo Huh
PURPOSE: The purpose of this study was to determine fracture resistance and failure modes of three-unit fixed dental prostheses (FDPs) made of lithium disilicate pressed on zirconia (LZ), monolithic lithium disilicate (ML), and monolithic zirconia (MZ). MATERIALS AND METHODS: Co-Cr alloy three-unit metal FDPs model with maxillary first premolar and first molar abutments was fabricated. Three different FDPs groups, LZ, ML, and MZ, were prepared (n = 5 per group)...
August 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/28869365/influence-of-different-ceramic-systems-on-marginal-misfit
#16
S P Vargas, A C C Neves, R Vitti, M Amaral, M N Henrique, L R Silva-Concílio
OBJECTIVE: the aim of this study was to evaluate the marginal misfit at the interface between a ceramic coping and its abutment. METHODS: Twenty-four specimens were made with solid abutments. The specimens were divided into 3 groups according to the ceramic system (n = 8): Lava (zirconia), IPS e.max Press (lithium disilicate), and IPS Empress Esthetic (leucite). All copings were cemented with resin luting agent (RelyX U200) and the marginal misfit were evaluated at 3 different times: initial, after cementation, and after mechanical cycling using a linear measuring microscope (Measuring Microscope STM-Olympus) at a magnification of 40x...
September 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28852747/establishing-a-suitable-surface-roughness-for-lithium-disilicate-implant-abutments-under-laboratory-conditions-a-morphologic-sem-and-profilometric-pilot-study
#17
Gertrud Fabel, Florian Beuer
The increasing use of dental implants rather than fixed cantilever bridges for standard dental restorations has led to the development of multiple materials in this field. The goal in modern dentistry in recent years has been to achieve results in implantology that match the natural dentition in esthetics and function. Constant efforts have been made to achieve a perfect emergence profile, and to individualize the surrounding periimplant soft tissue. Powder-free digital scanning is now possible, which allows for the computer-assisted design/computer-assisted manufacturing (CAD/CAM) of ready-to-fit customized immediate implant abutments in various appropriate materials...
2017: International Journal of Computerized Dentistry
https://www.readbyqxmd.com/read/28841393/evaluation-of-fracture-resistance-of-varying-thicknesses-of-zirconia-around-implant-abutment-cylinders
#18
Cheryl Jonghee Park, Jin-Ho Phark, Winston Wanli Chee
Zirconia is becoming increasingly used as a restorative material for implant-supported restorations, however information is lacking with respect to the minimum thickness of zirconia surrounding the implant components. The purpose of this study is to evaluate the resistance to fracture of different thicknesses of zirconia luted to implant components. Thirty cylinders of zirconia (Prettau, Zirkonzahn) with 13 mm height, designed with indented occlusal surface for loading, and varying wall thicknesses (0.5 mm, 1 mm, 1...
August 25, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28827030/is-zirconia-a-viable-alternative-to-titanium-for-oral-implant-a-critical-review
#19
REVIEW
Karthik Sivaraman, Aditi Chopra, Aparna I Narayan, Dhanasekar Balakrishnan
PURPOSE: Titanium based implant systems, though considered as the gold standard for rehabilitation of edentulous spaces, have been criticized for many inherent flaws. The onset of hypersensitivity reactions, biocompatibility issues, and an unaesthetic gray hue have raised demands for more aesthetic and tissue compatible material for implant fabrication. Zirconia is emerging as a promising alternative to conventional Titanium based implant systems for oral rehabilitation with superior biological, aesthetics, mechanical and optical properties...
August 17, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28817129/interproximal-papilla-stability-around-cad-cam-and-stock-abutments-in-anterior-regions-a-2-year-prospective-multicenter-cohort-study
#20
Diego Lops, Andrea Parpaiola, Gianluca Paniz, Luca Sbricoli, Vanessa Ruiz Magaz, Alvise Cenzi Venezze, Eriberto Bressan, Edoardo Stellini
The aim of this study was to compare the interproximal papilla stability of restorations supported by computer-aided design/computer-assisted manufacture (CAD/CAM) abutments to those supported by prefabricated stock abutments in anterior areas over a 2-year follow-up. Abutments were selected depending on implant inclination and thickness of buccal peri-implant soft tissues from the following: zirconia stock, titanium stock, zirconia CAD/CAM and titanium CAD/CAM. Differences between the height of the papilla tip were measured (REC)...
September 2017: International Journal of Periodontics & Restorative Dentistry
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