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Zirconia abutment

Sunyoung Ma, Andrew Tawse-Smith, Simon D K Brown, Warwick Duncan
BACKGROUND: Single implant crowns have become the preferred rehabilitation treatment option for replacing a missing tooth. PURPOSE: This study evaluates 5-year clinical success of using tilted implants placed immediately after extraction followed by rehabilitation with all-ceramic crowns. MATERIALS AND METHODS: Twenty-seven participants requiring 28 single implant crowns in the aesthetic zone of maxilla were recruited to participate in a single-arm clinical trial...
February 14, 2019: Clinical Implant Dentistry and related Research
M R Kaizer, S Bano, M Borba, V Garg, M B F Dos Santos, Y Zhang
Monolithic zirconia crowns have become very popular; their surface finish is considered a key factor for restoration longevity. While polishing has shown excellent results in vivo, the surface glass infiltration of zirconia may offer superior damage resistance and aesthetic advantages by using tooth-colored glasses. Thus, the purpose of this study is to evaluate the efficacy of polishing and glass infiltration on the wear behavior of monolithic zirconia crowns. The wear behavior of intact natural molar teeth was investigated as a reference...
February 11, 2019: Journal of Dental Research
Ikiru Atsuta, Yasunori Ayukawa, Akihiro Furuhashi, Ikue Narimatsu, Ryosuke Kondo, Wakana Oshiro, Kiyoshi Koyano
The aims of implant treatment now involve not only restoration of mastication function, but also recovery of esthetics. Currently, zirconia is widely used as an esthetic material for implant abutment. Therefore, it is very important to understand the efficacy of zirconia for epithelial sealing as an implant material. We compared the effects of materials on the sealing of the peri-implant epithelium (PIE) to titanium (Ti) or zirconia (Zr) implants, for application to clinical work. Maxillary first molars were extracted from rats and replaced with Ti or Zr implants...
February 6, 2019: Journal of Biomedical Materials Research. Part A
Silvia Brandt, Anna Winter, Hans-Christoph Lauer, Fritz Kollmar, Soo-Jeong Portscher-Kim, Georgios E Romanos
The IPS e.max system by Ivoclar Vivadent, offering a variety of products and indications, is widely used for all-ceramic restorations. We analyzed the clinical track record of these products in daily clinical practice, associating their restorative survival rate with various parameters to define recommendations for long-term stability. A total of 1058 full-coverage crowns and fixed partial dentures (FPDs) were evaluated retrospectively over up to 66.48 (37.05 ± 18.4) months. All were made of IPS e.max Press, IPS e...
February 2, 2019: Materials
Saadet Sağlam Atsü, M Emin Aksan, Ali Can Bulut
PURPOSE: The purpose of this study was to compare the fracture resistances and the fracture types of titanium, zirconia, and ceramic-reinforced polyetheretherketone (PEEK) implant abutments supporting CAD/CAM monolithic lithium disilicate ceramic crowns after in vitro dynamic loading and thermocycling aging. MATERIALS AND METHODS: Three implant abutment (SKY Implant) groups-titanium (group Ti, control); zirconia with titanium base (group Zr); and ceramic-reinforced PEEK (BioHPP) with titanium base (group RPEEK); n = 12 each-were used...
February 4, 2019: International Journal of Oral & Maxillofacial Implants
M Waldecker, S Rues, P Rammelsberg, W Bömicke
OBJECTIVE: In the past, discrepancies between laboratory results and clinical behavior have been observed for all-ceramic restorations. This analysis of fracture resistance of zirconia-based inlay-retained fixed partial dentures (IRFPDs) aimed at identifying correlations between an in-vitro test setup and the clinical situation. The effects of tooth material, tooth mobility, restoration design, load direction, and different cements were taken into account. METHODS: The in-vitro test model and IRFPD were reverse engineered (Geomagic DesignX) and meshed predominantly with hexahedral elements (approx...
January 24, 2019: Dental Materials: Official Publication of the Academy of Dental Materials
Francesco Mangano, Bidzina Margiani, Oleg Admakin
PURPOSE: To present a novel, full-digital protocol for the design and fabrication of implant-supported monolithic translucent zirconia crowns cemented on customized hybrid abutments. METHODS: The present retrospective clinical study was based on data from patients who had been treated with single Morse-taper connection implants (Exacone® , Leone Implants, Florence, Italy) and were prosthetically restored with monolithic translucent zirconia crowns, cemented on customized hybrid abutments...
January 24, 2019: International Journal of Environmental Research and Public Health
Adham Elsayed, Gasser Farrag, Mohamed Sad Chaar, Nouran Abdelnabi, Matthias Kern
PURPOSE: To investigate the effects of different commercially available computer-aided design/computer-assisted manufacturing (CAD/CAM) materials for fabrication of molar crowns, including polyetheretherketone (PEEK), on the fracture strength and failure mode of custom-made titanium and zirconia abutments after artificial aging. MATERIALS AND METHODS: A total of 48 identical custom-made CAD/CAM abutments milled out of titanium or zirconia were divided into six test groups of eight specimens each...
January 2019: International Journal of Prosthodontics
Walaa Magdy Ahmed, Mohamed-Nur Abdallah, Anthony P McCullagh, Chris C L Wyatt, Tom Troczynski, Ricardo M Carvalho
PURPOSE: The marginal fit is an essential component for the clinical success of prosthodontic restorations. The aim of this study was to investigate the influence of different abutment finish line widths and crown thicknesses on the marginal fit of zirconia crowns fabricated using either standard or fast sintering protocols. MATERIALS AND METHODS: Six titanium abutments were fabricated for receiving zirconia molar crowns. Crowns were designed virtually and milled from partially sintered zirconia blanks and divided into 12 groups (n = 10/group)...
January 17, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Reto Nueesch, Julian Conejo, Francis Mante, Jens Fischer, Sabrina Märtin, Nadja Rohr, Markus B Blatz
OBJECTIVE: This study evaluated the loading capacity of CAD/CAM-fabricated anterior feldspathic ceramic crowns bonded to one-piece zirconia implants with different cements. MATERIAL AND METHODS: Fifty one-piece zirconia implants were embedded in epoxy resin. The abutment aspect of one implant was optically scanned and a standardized upper canine was designed with CAD-software. Fifty feldspathic ceramic crowns were milled, polished, and mounted on the implants either without any cement, with a temporary cement or with three different composite resin cements after surface pretreatment as recommended by the manufacturers (n = 10)...
January 10, 2019: Clinical Oral Implants Research
Adrien Naveau, Christophe Rignon-Bret, Claudine Wulfman
STATEMENT OF PROBLEM: The success of single, anterior, implant-supported restorations relies on mechanical and esthetic outcomes. Titanium has been the most commonly used material for abutments, but zirconia is increasingly chosen for its appearance despite its unclear mechanical performance. Today, manufacturers market prefabricated, computer-aided design and computer-aided manufacturing (CAD-CAM) custom and zirconia abutments with titanium connections. PURPOSE: The purpose of this study was to systematically review the mechanical and esthetic outcomes of implant zirconia abutments used in the anterior region, considering the design changes of the past 5 years...
January 4, 2019: Journal of Prosthetic Dentistry
Joshua A Manchester, Kwok-Hung Chung, James S Brudvik, Van Ramos, Yen-Wei Chen
STATEMENT OF PROBLEM: The prevalent use of computer-aided design and computer-aided manufacturing (CAD-CAM) for tooth-colored ceramic materials has led to several case reports and retrospective clinical studies of surveyed crowns used to support removable partial dentures. How the specific contour of a cingulum rest seat affects the fracture resistance of these CAD-CAM tooth-colored materials is unknown. PURPOSE: The purpose of this in vitro study was to compare the fracture resistance of monolithic CAD-CAM tooth-colored mandibular canine-surveyed ceramic crowns with cingulum rest seats of different designs...
December 28, 2018: Journal of Prosthetic Dentistry
A C Branco, V Moreira, J A Reis, R Colaço, C G Figueiredo-Pina, A P Serro
Loosening and fracture of implanted dental crowns is a consequence of relative micromovements between the zirconia abutment and the titanium alloy of the implant, in a biochemical aggressive environment. Thus, it is important to establish the in vitro tribological testing conditions that better mimics such environment. The present work aims to evaluate the effect of ball-on-plate tests configuration on the tribological behavior of ZrO2 /Ti6Al4V pair in dry and lubricated conditions, using different lubricants: water, artificial saliva solution and human saliva...
December 13, 2018: Journal of the Mechanical Behavior of Biomedical Materials
Saied Nokar, Amirreza Hendi, Yasamin Babaee Hemmati, Mehran Falahchai
Severe forms of attrition are frequently found in patients with no or insufficient posterior occlusal support. Management of such patients using fixed or removable prostheses is a complex procedure and is still a challenge for clinicians. The present clinical report describes step by step full mouth rehabilitation of a patient with severely worn dentition using computer-aided design/computer-aided manufacturing- (CAD/CAM-) generated wax patterns, milled zirconia frameworks, and fabrication of removable partial denture (RPD) abutments using a digital-conventional method...
2018: Case Reports in Dentistry
Carlos Lopez-Suarez, Celia Tobar, Maria Fernanda Sola-Ruiz, Jesus Pelaez, Maria J Suarez
PURPOSE: To evaluate the influence of static (not pre-loaded) and thermomechanical loading on the load to fracture of metal-ceramic, monolithic and veneered zirconia computer-aided design/computer-aided manufacturing (CAD/CAM) posterior fixed partial dentures (FPDs). MATERIALS AND METHODS: One hundred standardized specimens with 2 abutments screwed onto a platform were prepared from stainless steel to receive a posterior 3-unit FPD with an intermediate pontic. Specimens were randomly divided into 5 groups (n = 20): Metal-ceramic (control group), Lava Zirconia system, Vita In-Ceram YZ, IPS e-max ZirCAD, and Lava Plus...
December 13, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Andrea Laass, Irena Sailer, Jürg Hüsler, Christoph Hf Hämmerle, Daniel S Thoma
The objective of this trial study was to assess whether submucosal veneering of internally connected zirconia abutments influences clinical, radiographic, and technical outcomes of single-tooth implant-borne reconstructions at 5 years after loading. A total of 20 patients with 20 single-tooth implants in the anterior or premolar area of the maxilla or mandible were included. The implants were randomly restored with fixed single-tooth reconstructions using either pink-veneered customized zirconia abutments (test group = 10) or nonveneered customized zirconia abutments (control group = 10)...
January 2019: International Journal of Periodontics & Restorative Dentistry
Onur Geckili
ARTICLE TITLE AND BIBLIOGRAPHIC INFORMATION: Effects of modified abutment characteristics on peri-implant soft tissue health: a systematic review and meta-analysis. Sanz-Martín I, Sanz-Sánchez I, Carrillo de Albornoz A, Figuero E, Sanz M. Clin Oral Implants Res 2018; 29(1):118-29. SOURCE OF FUNDING: Nonprofit foundation: Oral Reconstruction Foundation, Basel, Switzerland. TYPE OF STUDY/DESIGN: Systematic review with meta-analysis of data...
December 2018: Journal of Evidence-based Dental Practice
Ankur Dahiya, Nadim Z Baba, Mathew T Kattadiyil, Charles J Goodacre, Akshita Mann
STATEMENT OF PROBLEM: Excess cement around dental implants is a significant cause of peri-implant inflammation. Research has focused on approaches to cement removal, the type of cement used, and the different instruments used for cement removal with titanium abutments. However, data comparing zirconia with titanium abutments are lacking. PURPOSE: The purpose of this in vitro study was to compare the effectiveness of excess cement removal from zirconia and titanium custom abutments using an explorer and to compare the effects of cement removal on the abutment surfaces...
December 1, 2018: Journal of Prosthetic Dentistry
Tomohide Kondo, Futoshi Komine, Junichi Honda, Hiroki Takata, Yuta Moriya
PURPOSE: To determine the effect of veneering material and framework design on fracture loads of implant-supported zirconia molar fixed dental prostheses (FDPs). METHODS: Sixty-six zirconia FDPs were manufactured onto two implants and classified as uniform thickness (UT) or anatomic design (AD). These framework design groups were then further divided into three subgroups (n=11): feldspathic porcelain-veneered zirconia FDPs (PVZ), indirect composite-veneered zirconia FDPs (IVZ), and metal-ceramic FDPs (MC)...
November 13, 2018: Journal of Prosthodontic Research
Rae-Kyeong Nam, Sang J Lee, Eun-Jin Park, Ho-Beom Kwon, Hyung-In Yoon
PURPOSE: The aim of this study was to investigate the influence of the abutment material and the connection geometry on deformation and wear at the internal implant-abutment connection area (IAC), using an optical scanner. MATERIALS AND METHODS: Thirty-two internal conical titanium implants, and two types of prefabricated abutments (zirconia or titanium), each (n = 8) with different connection geometries (hexagon or nonhexagon) were prepared. The inner surfaces of the implants were optically scanned before and after loading for 100,000 cycles in a simulated wet environment...
November 2018: International Journal of Oral & Maxillofacial Implants
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