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Journal of Prosthetic Dentistry

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https://www.readbyqxmd.com/read/28274469/the-addition-of-silica-nanoparticles-on-the-mechanical-properties-of-dental-stone
#1
Leonardo De Cesero, Elisa Magno Nunes de Oliveira, Luiz Henrique Burnett Junior, Ricardo Meurer Papaléo, Eduardo Gonçalves Mota
STATEMENT OF PROBLEM: The current application of nanotechnology in dentistry is limited to nanoparticles incorporated into adhesive systems and composite resins. Dental stone is a widely used material, and the incorporation of silica nanoparticles is still unexplored. PURPOSE: The purpose of this in vitro study was to evaluate the mechanical properties of dental stone after the addition of silica nanoparticles in different concentrations. MATERIAL AND METHODS: A total of 180 specimens were prepared, 90 for each dental stone (Durone and Fuji Rock)...
March 5, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28238306/effect-of-hydrothermal-treatment-on-light-transmission-of-translucent-zirconias
#2
Armand Putra, Kwok-Hung Chung, Brian D Flinn, Tuesday Kuykendall, Cheng Zheng, Kosuke Harada, Ariel J Raigrodski
STATEMENT OF PROBLEM: Studies of the light transmission of translucent zirconias after hydrothermal treatment are limited. PURPOSE: The purpose of this in vitro study was to evaluate the effect of hydrothermal treatment on the light transmission of translucent zirconias for monolithic restorations. MATERIAL AND METHODS: Four commercially available zirconia products, BruxZir Anterior Solid Zirconia (BruxAnt, BA), Lava Plus High Translucency (LPHT), Katana Zirconia Super Translucent (KST), and Katana Zirconia Ultra Translucent (KUT) were assessed and 1 type of lithium disilicate, e...
February 18, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222886/effect-of-different-acidic-solutions-on-the-optical-behavior-of-lithium-disilicate-ceramics
#3
Daniela Micheline Dos Santos, Emily Vivianne Freitas da Silva, Aljomar José Vechiato-Filho, Denis Watanabe, Sandro Basso Bitencourt, Aimée Maria Guiotti, Marcelo Coelho Goiato
STATEMENT OF PROBLEM: The stability of the optical characteristics of dental ceramics is essential. Degradation of these materials resulting from pH or temperature alterations in the oral cavity can lead to treatment failure. PURPOSE: The purpose of this in vitro study was to evaluate the color change (ΔE), the L* coordinate, the translucency parameter, and the contrast ratio of lithium disilicate ceramic exposed to commonly used and potentially colorant solutions...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222885/the-influence-of-lip-form-on-incisal-display-with-lips-in-repose-on-the-esthetic-preferences-of-dentists-and-lay-people
#4
Jee Kim, Richard Topolski, Douglas Dickinson, Van Ramos
STATEMENT OF PROBLEM: Information is lacking for viewer preferences for incisal display with lips in repose. PURPOSE: The purpose of this online survey was to establish measurement parameters to classify and define a lip form and to evaluate the influence of lip form on dentists' and laypersons' preferences for the amount of incisal display with lips in repose. MATERIAL AND METHODS: Computer-generated male and female models were created using 3 different lip forms each, straight, moderate, and high...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222884/quality-assurance-of-ceramic-dental-restorations-by-photographic-transillumination
#5
João Malta Barbosa, Ronaldo Hirata, Michael Donovan, João Caramês
No abstract text is available yet for this article.
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222883/simplified-digital-workflow-for-dental-implant-restoration-on%C3%A2-a%C3%A2-stock%C3%A2-abutment-using-an-intraoral-scanner-a%C3%A2-dental%C3%A2-technique
#6
Jong-Eun Kim, Ji-Hyun Park, Hong-Seok Moon, June-Sung Shim
A straightforward digital restorative method based on a library of stock abutments is presented. Precisely scanned data of laboratory analog components of the stock abutment were obtained using a tabletop scanner to produce the library. The stock abutment and surrounding teeth, opposing arch, and occlusal information were recorded using an intraoral scanner. After transferring the scanned data to computer-aided design software, an appropriate library file for the abutment connected within the mouth was matched in order to design the prosthesis...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222882/in-office-fabrication-of-dental-implant-surgical-guides-using-desktop-stereolithographic-printing-and-implant-treatment-planning-software-a-clinical-report
#7
Daniel Whitley, R Scott Eidson, Ivan Rudek, Sompop Bencharit
Guided surgery is accepted as the most accurate way to place an implant and predictably relate the implant to its definitive prosthesis, although few clinicians use it. However, recent developments in high-quality desktop 3-dimensional stereolithographic printers have led to the in-office fabrication of stereolithographic surgical guides at reduced cost. This clinical report demonstrates a protocol for using a cost-effective, in-office rapid prototyping technique to fabricate a surgical guide for dental implant placement...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222881/a-method-of-facilitating-the-fabrication-of-access-openings-for-implant-supported-complete-fixed-dental-prostheses
#8
Seok-Hwan Cho, Geoffrey A Thompson
This report describes a method for fabricating access openings for implant-supported complete fixed dental prostheses (ICFP) by using a dental milling machine and silicone putty matrix. The method can help clinicians achieve the accurate and precise fabrication of access openings for ICFPs without excessive grinding.
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222880/success-rate-and-strength-of-osseointegration-of-immediately-loaded-uv-photofunctionalized-implants-in-a-rat-model
#9
Pooya Soltanzadeh, Amirreza Ghassemi, Manabu Ishijima, Miyuki Tanaka, Wonhee Park, Chika Iwasaki, Makoto Hirota, Takahiro Ogawa
STATEMENT OF PROBLEM: Despite its clinical benefits, the immediate loading protocol might have a higher risk of implant failure than the regular protocol. Ultraviolet (UV) photofunctionalization is a novel surface enhancement technique for dental implants. However, the effect of photofunctionalization under loading conditions is unclear. PURPOSE: The purpose of this animal study was to evaluate the effect of photofunctionalization on the biomechanical quality and strength of osseointegration under loaded conditions in a rat model...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222879/evaluation-of-die-trim-morphology-made-by-cad-cam%C3%A2-technology
#10
Pratiksha Agrawal, Geoffrey Thompson, Seok-Hwan Cho, Gerald J Ziebert
STATEMENT OF PROBLEM: The die contour can affect the emergence profile of prosthetic restorations. However, little information is available regarding the congruency between a stereolithographic (SLA) die and its corresponding natural tooth. PURPOSE: The purpose of this vitro study was to evaluate the shapes of SLA die in comparison with the subgingival contour of a prepared tooth to be restored with a ceramic crown. MATERIAL AND METHODS: Twenty extracted human teeth, 10 incisors, and 10 molars, were disinfected and mounted in a typodont model...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222878/clinical-complications-and-quality-assessments-with-computer-engineered-complete-dentures-a-systematic-review
#11
REVIEW
Mathew T Kattadiyil, Abdulaziz AlHelal, Brian J Goodacre
STATEMENT OF PROBLEM: Computer-engineered complete dentures (CECDs) have significant potential as shown by recent reports of outcomes and specific applications. An understanding of complications and quality assessment factors associated with CECDs from compiled data is lacking in published reports. PURPOSE: The purpose of this systematic review was to determine the clinical complications and quality assessments related to CECDs. MATERIAL AND METHODS: Electronic searches of publications in English from January 1984 to September 2016 were performed in MEDLINE and Cochrane databases, with the results enriched by manual searches and citation mining to address 2 population intervention comparison outcome (PICO) questions: what are the clinical complications associated with CECDs, and what are the quality assessments with CECDs? RESULTS: A review of 5 selected articles (limited data) on CECDs revealed patient dissatisfaction related to overall outcome (25...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222877/fracture-of-layered-zirconia-restorations-at-5-years-a-dental-laboratory-survey
#12
Aous A Abdulmajeed, Terence E Donovan, Lyndon F Cooper, Ricardo Walter, Taiseer A Sulaiman
STATEMENT OF PROBLEM: The use of ceramic restorations has significantly increased in recent years because of their esthetic properties and the high cost of noble metals. However, given the lack of long-term clinical trials and the limitations of in vitro studies, the durability of ceramic restorations is still questionable. PURPOSE: The purpose of this retrospective study was to determine the fracture rate of layered zirconia restorations at up to 5 years of clinical performance by using a dental laboratory survey model...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222876/evaluation-of-the-effect-of-an-offset-implant-configuration-in-the-posterior-maxilla-with-external-hexagon-implant-platform-a-3-dimensional-finite-element-analysis
#13
Victor Eduardo de Souza Batista, Fellippo Ramos Verri, Daniel Augusto de Faria Almeida, Joel Ferreira Santiago Junior, Cleidiel Aparecido Araújo Lemos, Eduardo Piza Pellizzer
STATEMENT OF PROBLEM: Slight displacement of the central implant in 3-unit implant-supported prostheses has been reported to improve biomechanical behavior. However, studies that assessed the effects of an offset implant configuration in the posterior maxilla are scarce. PURPOSE: The purpose of this 3-dimensional (3D) finite element analysis was to assess the effects of splinting in 3-unit implant-supported prostheses with varying implant positions (straight-line or offset configuration) in terms of the stress/strain distribution on bone tissue and the stress distribution on abutment screws...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222875/comparison-of-push-out-bond-strength-of-fiber-reinforced-composite-resin-posts-according-to-cement-thickness
#14
Jun-Seong Park, Jeong-Sub Lee, Jeong-Won Park, Won-Gyun Chung, Eun-Hee Choi, Yoon Lee
STATEMENT OF PROBLEM: Post space size and cement thickness can differ because of variations in root canal morphology, such as an oval shape, and because the entire canal space cannot be included in the post space preparation. As a result, increased cement thickness around the post may affect the bond strength between the post and the dentin. PURPOSE: The purpose of this in vitro study was to evaluate the push-out bond strength of fiber-reinforced composite resin posts to root dentin with cement layers of varying thickness...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222874/response-to-radia-s-sheriff-m-mcdonald-f-naini-fb-relationship-between-maxillary-central-incisor-proportions-and-facial-proportions-j-prosthet-dent-2016-115-741-8
#15
LETTER
Farhad B Naini
No abstract text is available yet for this article.
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222873/influence-of-abutment-tooth-geometry-on-the-accuracy-of%C3%A2-conventional-and-digital-methods-of-obtaining-dental%C3%A2-impressions
#16
Jeison B Carbajal Mejía, Kazumichi Wakabayashi, Takashi Nakamura, Hirofumi Yatani
STATEMENT OF PROBLEM: Direct (intraoral) and indirect (desktop) digital scanning can record abutment tooth preparations despite their geometry. However, little peer-reviewed information is available regarding the influence of abutment tooth geometry on the accuracy of digital methods of obtaining dental impressions. PURPOSE: The purpose of this in vitro study was to evaluate the influence of abutment tooth geometry on the accuracy of conventional and digital methods of obtaining dental impressions in terms of trueness and precision...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222872/clinical-marginal-fit-of-zirconia-crowns-and-patients-preferences-for-impression-techniques-using-intraoral-digital-scanner-versus-polyvinyl-siloxane-material
#17
Nawapat Sakornwimon, Chalermpol Leevailoj
STATEMENT OF PROBLEM: The use of digital intraoral scanners is increasing; however, evidence of its precision in making crown impressions clinically remains scarce. Patients should also feel more comfortable with digital impressions, but only a few studies evaluating this subject have been performed. PURPOSE: The purpose of this clinical study was to evaluate the marginal fit of monolithic zirconia crowns and patients' preferences for digital impressions versus polyvinyl siloxane (PVS) impressions...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222871/evaluation-of-hypersensitivity-after-the-placement-of-metal-ceramic-crowns-cemented-with-two-luting-agents-long-term-results-of-a-prospective-clinical-study
#18
Carla Kozmacs, Katharina Schaper, Hans-Christoph Lauer, Andree Piwowarczyk
STATEMENT OF PROBLEM: Different luting materials are available for the cementation of fixed dental prostheses. Postcementation hypersensitivity is an occasional complication in the definitive delivery. How the choice of luting agent affects long-term postcementation sensitivity is unknown. PURPOSE: The purpose of this prospective, randomized, controlled, split-mouth clinical trial was to compare the hypersensitivity of 2 cementation methods for metal ceramic crowns...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222870/influence-of-3-different-forms-of-a-commercially-available-denture-adhesive-material-on-the-growth-of-candida-species-an-in%C3%A2-vitro-study
#19
Anuram Rajaram, Smita Sara Manoj
STATEMENT OF PROBLEM: Although different forms of denture adhesives are widely used by the elderly, insufficient information is available for the effect of adhesives on the growth of Candida species. PURPOSE: The purpose of this in vitro study was to compare the influence of 3 different forms of a commercially available denture adhesive material on the growth of Candida species by monitoring the pH and number of colonies in the growth medium at different incubation periods...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28222869/accuracy-evaluation-of-intraoral-optical-impressions-a-clinical-study-using-a-reference-appliance
#20
Mohammad A Atieh, André V Ritter, Ching-Chang Ko, Ibrahim Duqum
STATEMENT OF PROBLEM: Trueness and precision are used to evaluate the accuracy of intraoral optical impressions. Although the in vivo precision of intraoral optical impressions has been reported, in vivo trueness has not been evaluated because of limitations in the available protocols. PURPOSE: The purpose of this clinical study was to compare the accuracy (trueness and precision) of optical and conventional impressions by using a novel study design. MATERIAL AND METHODS: Five study participants consented and were enrolled...
February 17, 2017: Journal of Prosthetic Dentistry
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