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Journal of Prosthodontics: Official Journal of the American College of Prosthodontists

journal
https://www.readbyqxmd.com/read/29999570/effect-of-aging-on-stained-monolithic-resin-ceramic-cad-cam-materials-quantitative-and-qualitative-analysis-of-surface-roughness
#1
Sven Mühlemann, Joëlle M Bernini, Beatrice Sener, Christoph Hf Hämmerle, Mutlu Özcan
PURPOSE: The aim of this in vitro study was to measure the effect of staining and artificial aging on the surface roughness of commercially available resin-ceramic computer-aided design and computer-aided manufacturing (CAD/CAM) materials both quantitatively and qualitatively and to compare it to feldspathic material. MATERIALS AND METHODS: Test specimens (n = 15 per material) were prepared of CAD/CAM ingots from a resin nanoceramic (Lava Ultimate, LVU), a polymer-infiltrated ceramic (Vita Enamic, ENA), and a resin nanoceramic (Cerasmart, CER)...
July 12, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29999563/facebow-use-in-clinical-prosthodontic-practice
#2
William W Nagy, Gary R Goldstein
The use of a dental facebow in diagnosis and treatment by the restorative dentist has been controversial in recent years. Digital alternatives have been proposed and hold promise for the future; however, the traditional facebow still has practicality in a modern restorative practice. The purpose of this paper is to review facebow use in clinical prosthodontic practice.
July 12, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29968424/accuracy-of-dental-replica-models-using-photopolymer-materials-in-additive-manufacturing-in-vitro-three-dimensional-evaluation
#3
Su-Jin Jin, Dong-Yeon Kim, Ji-Hwan Kim, Woong-Chul Kim
PURPOSE: To evaluate the accuracy (trueness and precision) of dental replica models produced by using photopolymer materials in additive manufacturing. MATERIALS AND METHODS: A complete arch model was scanned using an extraoral scanner (Identica Blue) and established as reference. For the control group, 10 stone models were acquired through the conventional method from the reference model. For the experimental groups, digital data were acquired using an intraoral scanner (CEREC Omnicam), and 10 stereolithographic apparatus (SLA) models and 10 PolyJet models were made...
July 2, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29968276/in-vitro-effect-of-mastication-on-the-retention-and-wear-of-locator-attachments-in-a-flat-mandibular-ridge-model
#4
Georges Tehini, Nadim Z Baba, Zeina Majzoub, Paul Nahas, Antoine Berberi, Khaldoun Rifai
PURPOSE: The effect of masticatory loads on the retention of overdenture attachments is poorly documented. The aim of this in vitro study is to assess the effect of simulated mastication on the retentive properties and dimensions of Locator inserts. MATERIALS AND METHODS: 30 specimens simulating nonanatomic edentulous flat ridges with two implant replicas each were fabricated. Overdenture units were connected to the implants with Locator attachments and 3 types of inserts: transparent (Group T; n = 10 pairs), pink (Group P; n = 10 pairs), and blue (Group B; n = 10 pairs)...
July 2, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29968266/effect-of-zirconia-core-thickness-and-veneer-firing-cycle-on-the-biaxial-flexural-strength-of-veneering-ceramic
#5
Abdullah Saeed Alayad
PURPOSE: To evaluate the influence of various Y-TZP thicknesses and veneer firing cycles on the strength of two ceramic veneers. MATERIALS AND METHODS: 180 Y-TZP cores of 0.5, 1.0, and 5.0 mm thickness were prepared followed by sintering in a high temperature furnace; 180 presintered veneering ceramic discs (Vita VM9 porcelain and e.max Ceram) were also prepared using a mold. The discs were placed on zirconia plates (zirconia cores) of different thickness (0.5, 1...
July 2, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29961986/the-effect-of-cad-cam-crown-material-and-cement-type-on-retention-to-implant-abutments
#6
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
https://www.readbyqxmd.com/read/29962017/in-vitro-evaluation-of-adhesion-of-candida-albicans-on-cad-cam-pmma-based-polymers
#7
Sema Murat, Gülce Alp, Canan Alatalı, Meltem Uzun
PURPOSE: To compare the amount of adherent Candida albicans to different CAD/CAM poly(methyl methacrylate) (PMMA)-based polymers and conventional heat-polymerized PMMA after long-term thermal cycling. MATERIALS AND METHODS: The specimens were subjected to 10,000 thermal cycles (5-55°C) and divided into two groups, uncoated and pellicle-coated. Surface roughness and contact angles of the specimens were measured. The surface morphology was observed with scanning electron microscopy (SEM)...
July 1, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29961952/investigating-the-effect-of-different-surface-treatments-on-vickers-hardness-and-flexural-strength-of-zirconium-and-lithium-disilicate-ceramics
#8
Alper Ozdogan, Zeynep Yesil Duymus
PURPOSE: To investigate the effect of different surface treatments on Vickers hardness and flexural strength of zirconia and lithium disilicate ceramics. MATERIALS AND METHODS: 50 zirconia and 50 lithium disilicate ceramic specimens were used. After identifying one group as the control, grinding, sandblasting, CoJet, and Er:YAG laser were applied on the surface of specimens (n = 10). After applying Vickers hardness test to specimens, flexural strength test was performed...
July 1, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29896904/a-comparison-of-the-flexural-and-impact-strengths-and-flexural-modulus-of-cad-cam-and-conventional-heat-cured-polymethyl-methacrylate-pmma
#9
Ziad N Al-Dwairi, Kawkab Y Tahboub, Nadim Z Baba, Charles J Goodacre
PURPOSE: The introduction of computer-aided design/computer-aided manufacturing (CAD/CAM) technology to the field of removable prosthodontics has recently made it possible to fabricate complete dentures of prepolymerized polymethyl methacrylate (PMMA) blocks, which are claimed to be of better mechanical properties; however, no published reports that have evaluated mechanical properties of CAD/CAM PMMA. The purpose of this study was to compare flexural strength, impact strength, and flexural modulus of two brands of CAD/CAM PMMA and a conventional heat-cured PMMA...
June 13, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29896897/private-practice-of-prosthodontists-in-the-united-states-results-from-the-2017-survey-of-prosthodontists-and-trends-since-2001
#10
Kent D Nash, Douglas G Benting
PURPOSE: To review data and results from past surveys of prosthodontists sponsored and conducted by the American College of Prosthodontists (ACP). Specifically, results are examined and presented from the most recently conducted survey in 2017. Trends and changes in characteristics impacting the private practice of prosthodontists over time are discussed using results from six surveys completed in 2002, 2005, 2008, 2011, 2014, and 2017. MATERIALS AND METHODS: Results from the past surveys of prosthodontists are statistically examined and used to estimate several characteristics of the current population of practicing prosthodontists...
June 13, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29896787/fatigue-behavior-of-different-cad-cam-materials-for-monolithic-implant-supported-molar-crowns
#11
Bruno Salles Sotto-Maior, Rafael Corrêa Carneiro, Carlos Eduardo Francischone, Neuza Maria Souza Picorelli Assis, Karina Lopes Devito, Plinio Mendes Senna
PURPOSE: To evaluate the fracture resistance after the thermal and mechanical fatigue of feldspathic, lithium disilicate, and resin-modified CAD/CAM monolithic crowns cemented onto a universal post abutment. MATERIALS AND METHODS: A right second mandibular molar was designed in CAD/CAM software, and 30 crowns were machined using three different materials (n = 10): feldspathic ceramic, finished only with a glaze cycle (G1); lithium disilicate, sintered and finished with a glaze cycle (G2); and resin, modified by nanoceramic and finished with rubber (G3)...
June 13, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29896783/a-painting-technique-using-ceramic-pigments-for-the-artificial-iris-of-an-ocular-prosthesis-guided-by-applying-newton-s-color-wheel
#12
Elizabeth Rodrigues Alfenas, Jéssica Genoveva Boline Passarelli Capaz Pinto da Silva, Maria Elizabeth Sousa Silveira, Maria Fernanda Lopes Fonseca, José Alcides Almeida de Arruda, Amália Moreno
This article describes a simple method for painting an artificial iris for the manufacturing of an ocular prosthesis with dark and light tones, both with excellent esthetic results. The challenge of choosing colors around the pupil and medium zone during painting is aided by the application of Newton's color wheel theory. This technique provides a safer choice of color during the painting procedure by using a mixture of ceramic pigments.
June 13, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29888488/the-effect-of-a-continuous-mechanical-polishing-protocol-on-surface-roughness-biofilm-adhesion-and-color-stability-of-acrylic-resin-artificial-teeth
#13
Joel de Oliveira Barreto, Flávia Jucá de Alencar-Silva, Viviane Cássia Oliveira, Cláudia Helena Silva-Lovato, Paulo Goberlânio Silva, Rômulo Rocha Regis
PURPOSE: Acrylic resin properties are susceptible to change over the duration of use, thereby decreasing prosthesis longevity. To make the material less susceptible to the action of external agents such as stain-causing liquids and cleaning solutions, polishing procedures are recommended. A specific mechanical polishing procedure performed regularly was evaluated regarding the biofilm adhesion, surface roughness (Ra), color stability (ΔE), and mass changes in acrylic resin artificial teeth...
June 10, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29883009/the-effect-of-food-simulating-agents-on-the-bond-strength-of-hard-chairside-reline-materials-to-denture-base-resin
#14
Farzaneh Sadat Fatemi, Mahroo Vojdani, Amir Ali Reza Khaledi
PURPOSE: To investigate the influence of food-simulating agents on the shear bond strength between direct hard liners and denture base acrylic resin. In addition, mode of failure was evaluated. MATERIALS AND METHODS: One hundred fifty cylindrical columns of denture base resin were fabricated and bonded to three types of hard reline materials (Hard GC Reline, Tokuyama Rebase II Fast, TDV Cold Liner Rebase). Specimens of each reline material were divided into five groups (n = 10) to undergo 12-day immersion in distilled water, 0...
June 8, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29882387/how-the-variations-of-the-thickness-in-ceramic-restorations-of-lithium-disilicate-and-the-use-of-different-photopolymerizers-influence-the-degree-of-conversion-of-the-resin-cements-a-systematic-review-and-meta-analysis
#15
Felipe V Martins, Wesley F Vasques, Edgard M Fonseca
PURPOSE: The purpose of this meta-analysis was to evaluate how the thickness variations in ceramic restorations of lithium disilicate and the use of different photopolymerizers influence the degree of conversion of the resin cements. METHODS: This study was performed according to the PRISMA checklist. The bibliographic research was performed to identify in vitro studies until December 2017 in the databases MEDLINE via PubMed, Web of Science, and Scopus. The selected studies were submitted to bias risk assessment...
June 7, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29882338/minimally-invasive-treatment-of-an-adult-with-severe-pseudo-class-iii-malocclusion
#16
Farhad Vahidi
Pseudo class III malocclusion is reverse anterior occlusion or anterior cross-bite with first molars and canines in a class I relationship. It is very important to diagnose the pseudo class III from true skeletal class III. The combination of anterior displacement of the mandible, tooth wear, and loss of occlusal vertical dimension (OVD) in adults may result anterior cross-bite. The key factor in diagnosis of this malocclusion is an interdisciplinary approach with an orthodontist. Cephalometric images are essential for diagnosis of pseudo class III mal-occlusion...
June 7, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29876998/does-surgical-crown-lengthening-procedure-produce-stable-clinical-outcomes-for-restorative-treatment-a-meta-analysis
#17
REVIEW
Zeyad H Al-Sowygh
PURPOSE: The present systematic review was designed to assess whether surgical crown lengthening (SCL) procedure produces stable clinical outcomes for restorative treatment. METHODS: Based on the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) guidelines, a specific PICO question was constructed: "Does the SCL procedure produce stable clinical outcomes for restorative treatment?" Electronic databases (MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials, and Cochrane Oral Health Group Trials Register) were searched up to December 2017...
June 6, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29876996/the-use-of-3d-printed-tooth-preparation-to-assist-in-teaching-and-learning-in-preclinical-fixed-prosthodontics-courses
#18
Piriya Boonsiriphant, Zeina Al-Salihi, Julie A Holloway, Galen B Schneider
Tooth preparation for fixed dental prostheses is not an easy procedure to understand spatially, especially for first-year dental students. This technical report describes an innovative technique for assisting learning in preclinical fixed prosthodontics courses. Ideal full-contour tooth preparations are digitally scanned and 3D printed to the exact specifications of the ideal preparation. Students and faculty use these printed tooth preparations as teaching and learning tools to facilitate in 3D visualization for fixed prosthodontics courses...
June 6, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29855135/the-effect-of-milling-metal-versus-milling-wax-on-implant-framework-retention-and-adaptation
#19
Safura Ghodsi, Salma Pirmoazen, Elaheh Beyabanaki, Mitra Rostami, Marzieh Alikhasi
PURPOSE: The metal framework of implant-supported restorations can be made using different methods. For a successful outcome, the acceptability of each method depends on the retention and fit of the restoration. The aim of this study was to evaluate and compare the retention and adaptation of copings fabricated using two methods: casting wax patterns made by computer-aided design/computer-aided manufacturing (CAD/CAM) technology, and milling sintered chromium-cobalt (Cr-Co) blocks. MATERIALS AND METHODS: Twenty-four abutment analogs (height, 5...
May 31, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29855127/effects-of-new-generation-all-ceramic-and-provisional-materials-on-fibroblast-cells
#20
Ayşe Atay, Işıl Gürdal, Vildan Bozok Çetıntas, Aslıhan Üşümez, Ebru Cal
PURPOSE: The purpose of this in vitro study was to evaluate the cytotoxic and apoptotic effects of seven new-generation all-ceramic materials for CAD/CAM (Lava Ultimate [LU], VITA Mark II [VM], InCoris TZI [IC], IPS e.max CAD [EM], VITA Suprinity [VS], Cerasmart [CS], IPS Empress CAD [EC]) and six provisional materials (Protemp 4 [PT], Telio CAD [TC], CAD-Temp [CT], Telio Lab [TL], Temdent Classic [TD], Telio CS C&B [TS]) on L929 mouse fibroblast cells. MATERIALS AND METHODS: 24 disc-shaped specimens (∅ = 5 mm, h = 2 mm) were prepared from each test material...
May 31, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
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