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Journal of Prosthetic Dentistry

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https://www.readbyqxmd.com/read/28089337/a-procedure-for-directly-measuring-the-physiologic-rest-position-and-occlusal-vertical-dimension
#1
Joseph E Makzoumé
No abstract text is available yet for this article.
January 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28089336/a-comparative-study-of-additive-and-subtractive-manufacturing-for-dental-restorations
#2
Eun-Jeong Bae, Il-Do Jeong, Woong-Chul Kim, Ji-Hwan Kim
STATEMENT OF PROBLEM: Digital systems have recently found widespread application in the fabrication of dental restorations. For the clinical assessment of dental restorations fabricated digitally, it is necessary to evaluate their accuracy. However, studies of the accuracy of inlay restorations fabricated with additive manufacturing are lacking. PURPOSE: The purpose of this in vitro study was to evaluate and compare the accuracy of inlay restorations fabricated by using recently introduced additive manufacturing with the accuracy of subtractive methods...
January 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28089335/intrusion-of-maxillary-molar-using-mini-implants-a-clinical-report-and-follow-up-at-5-years
#3
Célia Regina Maio Pinzan-Vercelino, Fausto Silva Bramante, Júlio de Araújo Gurgel, Eliane Cristina Carrera Eleres Vergani, Rosyane de Souza Gregório
This clinical report describes a straightforward alternative treatment for adult patients with extruded maxillary molars, who are reluctant to use fixed appliances and complex mechanics. The maxillary molar supereruption of a 57-year-old woman was treated using buttons bonded to the buccal and palatal surfaces of the molars, 2 mini-implants, and elastomeric chains. The intrusion was achieved in 5 months. The treatment stability was observed for 5 years after treatment.
January 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28089334/masticatory-function-and-oral-health-related-quality-of-life-in%C3%A2-patients-after-partial-maxillectomies-with-closed-or%C3%A2-open%C3%A2-defects
#4
Mohamed M Said, Takafumi Otomaru, Yesiboli Yeerken, Hisashi Taniguchi
STATEMENT OF PROBLEM: The healing pattern after surgical resection of tumors of the oral cavity involving the maxilla may vary from one patient to another. The result may be open communication between the oral and nasal cavities (open defect) or complete oronasal separation after healing of the defect area (closed defect). PURPOSE: The purpose of this clinical study was to compare masticatory function and oral health-related quality of life (OHRQoL) between patients with closed and open defects who had undergone a partial maxillectomy and were wearing dentomaxillary prostheses...
January 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28089333/fit-of-interim-crowns-fabricated-using-photopolymer-jetting-3d%C3%A2-printing
#5
Hang-Nga Mai, Kyu-Bok Lee, Du-Hyeong Lee
STATEMENT OF PROBLEM: The fit of interim crowns fabricated using 3-dimensional (3D) printing is unknown. PURPOSE: The purpose of this in vitro study was to evaluate the fit of interim crowns fabricated using photopolymer-jetting 3D printing and to compare it with that of milling and compression molding methods. MATERIAL AND METHODS: Twelve study models were fabricated by making an impression of a metal master model of the mandibular first molar...
January 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28089332/lithium-silicate-endocrown-fabricated-with-a-cad-cam-system-a-functional-and-esthetic-protocol
#6
Leonardo Fernandes da Cunha, Carla Castiglia Gonzaga, Janes Francio Pissaia, Gisele Maria Correr
An endocrown restoration is an alternative approach to complete crowns with intraradicular cores or dowels for the restoration of endodontically treated teeth. Endocrowns conserve tooth structure and require fewer dental visits. This approach has been widely used, and various materials and techniques have been reported. Computer-aided design and computer-aided manufacturing (CAD-CAM) systems can generate and store libraries of teeth with various anatomies in their database, and diagnostic tooth waxing may not be required...
January 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28089331/evaluation-of-marginal-and-internal-adaptation-of-hybrid-and-nanoceramic-systems-with-microcomputed-tomography-an-in%C3%A2-vitro-study
#7
Güler Yildirim, Ismail H Uzun, Ali Keles
STATEMENT OF PROBLEM: The accuracy of recently introduced chairside computer-aided design and computer-aided manufacturing (CAD-CAM) blocks is not well established, and marginal integrity and internal adaptation are not known. PURPOSE: The purpose of this in vitro study was to evaluate the marginal and internal adaptation of hybrid and nanoceramics using microcomputed tomography (μ-CT). MATERIAL AND METHODS: The marginal and internal adaptation of 3 polymer-infiltrated ceramic-network (PICN) materials (Vita Enamic [VE]; Lava Ultimate [LU]; Vita Suprinity [VS]) were compared with lithium disilicate (IPS e...
January 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28089330/finite-element-analysis-of-implant-assisted-removable-partial-dentures-framework-design-considerations
#8
Reza Shahmiri, Raj Das
STATEMENT OF PROBLEM: Connecting an acrylic resin base to both a metal framework and a rigidly fixed implant may affect the rotational displacement of the prosthesis during loading. PURPOSE: The purpose of this finite element analysis study was to analyze the effect of connecting a denture base metal framework to an implant with the aim of decreasing the rotational movement of an implant-assisted removable partial denture. MATERIAL AND METHODS: A mesial occlusal rest direct retainer and a distal occlusal rest direct retainer were modeled and adapted to incorporate a modified denture base metal framework in the connection area for each model...
January 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28088308/effect-of-various-polishing-systems-on-the-surface-roughness-and-phase-transformation-of-zirconia-and-the-durability-of-the-polishing-systems
#9
Chan Park, Mong-Sook Vang, Sang-Won Park, Hyun-Pil Lim
STATEMENT OF PROBLEM: Although many systems are used to polish zirconia, a comparison of the performance of zirconia and feldspathic porcelain polishing systems is lacking. PURPOSE: The purpose of this in vitro study was to compare the effects of 3 polishing systems on surface roughness, zirconia phase transformation, and durability of the polishing systems when applied to zirconia and feldspathic porcelain. MATERIAL AND METHODS: Three polishing systems were evaluated: Z1, a zirconia polishing system; Z2, a zirconia polishing system, and F1, a feldspathic porcelain polishing system...
January 11, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28088307/in-office-fabrication-of-a-definitive-cast-and-duplication-of-an-interim-implant-supported-fixed-acrylic-resin-complete-denture
#10
Lambert J Stumpel
The information contained in an interim implant-supported fixed acrylic resin complete denture is a starting point for fabricating the definitive restoration. Duplicating this information in an expedient, precise, and sanitary fashion is desirable so that the interim restoration can be returned to the waiting patient. A technique is described to fabricate an accurate definitive polyvinyl siloxane cast with laboratory analogs bonded to a prepolymerized, dimensionally stable, composite resin baseplate. A screw-retained polyvinyl siloxane duplication of the interim denture is related to this cast...
January 11, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28024824/a-technique-for-fabrication-of-cranial-prostheses-using-high-temperature-vulcanizing-silicone-material
#11
Pankaj Kharade, Kanchan Dholam, Ahire Gorakh
Cranioplasty is performed with various alloplastic implant materials, each having advantages and drawbacks. High-temperature vulcanizing silicone is used to fabricate cranioplasty implants because of certain beneficial properties. Silicone cranial implants lead to better adaptation with the bone adjacent to the cranial defect than acrylic resin and metal cranial prostheses. This article describes a technique for fabricating cranial implant prostheses using high-temperature vulcanizing silicone material.
December 23, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28024823/panoramic-radiographs-made-before-complete-removable-dental-prostheses-fabrication-a-retrospective-study-of-clinical%C3%A2-significance
#12
Richard J Kratz, Joanne N Walton, Michael I MacEntee, Caroline T Nguyen, David MacDonald
STATEMENT OF PROBLEM: The value of digital panoramic radiographs to screen for problems before fabricating conventional complete removable dental prostheses is unclear. PURPOSE: The purpose of this retrospective study was to examine the influence of pretreatment digital panoramic radiographs on the clinical management of patients receiving complete removable dental prostheses. MATERIAL AND METHODS: The clinical records, including panoramic radiographs, of 169 patients seeking new complete removable dental prostheses over a 6-year period were interpreted independently by both a prosthodontist and an oral and maxillofacial radiologist to identify radiographic findings that influenced clinical patient management...
December 23, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28024822/evaluation-of-the-accuracy-of-7-digital-scanners-an-in%C3%A2-vitro-analysis-based-on-3-dimensional-comparisons
#13
Walter Renne, Mark Ludlow, John Fryml, Zach Schurch, Anthony Mennito, Ray Kessler, Abigail Lauer
STATEMENT OF PROBLEM: As digital impressions become more common and more digital impression systems are released onto the market, it is essential to systematically and objectively evaluate their accuracy. PURPOSE: The purpose of this in vitro study was to evaluate and compare the trueness and precision of 6 intraoral scanners and 1 laboratory scanner in both sextant and complete-arch scenarios. Furthermore, time of scanning was evaluated and correlated with trueness and precision...
December 23, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28024821/machinability-of-cad-cam-materials
#14
Ramakiran Chavali, Amir H Nejat, Nathaniel C Lawson
STATEMENT OF PROBLEM: Although new materials are available for computer-aided design and computer-aided manufacturing (CAD-CAM) fabrication, limited information is available regarding their machinability. The depth of penetration of a milling tool into a material during a timed milling cycle may indicate its machinability. PURPOSE: The purpose of this in vitro study was to compare the tool penetration rate for 2 polymer-containing CAD-CAM materials (Lava Ultimate and Enamic) and 2 ceramic-based CAD-CAM materials (e...
December 23, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28024820/simplified-fabrication-of-an-implant-supported-framework-with-luted-abutment-cylinders
#15
Lambert J Stumpel
A technique is described to generate a framework for an implant-supported fixed complete denture. The main advantage of the described technique is the low production cost of a framework that has high strength, passive fit, and distinct retentive structures for each denture tooth.
December 23, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28024819/randomized-controlled-within-subject-evaluation-of-digital-and-conventional-workflows-for-the-fabrication-of-lithium-disilicate-single-crowns-part-ii-cad-cam-versus-conventional-laboratory%C3%A2-procedures
#16
Irena Sailer, Goran I Benic, Vincent Fehmer, Christoph H F Hämmerle, Sven Mühlemann
STATEMENT OF PROBLEM: Clinical studies are needed to evaluate the entire digital and conventional workflows in prosthetic dentistry. PURPOSE: The purpose of the second part of this clinical study was to compare the laboratory production time for tooth-supported single crowns made with 4 different digital workflows and 1 conventional workflow and to compare these crowns clinically. MATERIAL AND METHODS: For each of 10 participants, a monolithic crown was fabricated in lithium disilicate-reinforced glass ceramic (IPS e...
December 23, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28024818/effect-of-production-method-on-surface-roughness-marginal-and-internal-fit-and-retention-of-cobalt-chromium-single%C3%A2-crowns
#17
Nils Lövgren, Rikard Roxner, Susanne Klemendz, Christel Larsson
STATEMENT OF PROBLEM: New production methods have been developed for metal ceramic restorations. Different production methods may show different surface roughness and fit, which may affect retention and long-term success. PURPOSE: The purpose of this in vitro study was to examine 3 different production methods with regard to surface roughness, marginal and internal fit, and retention of cobalt-chromium alloy single-crown copings. MATERIAL AND METHODS: A master abutment of a premolar mandibular tooth preparation with 4-mm height and a 0...
December 23, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28024817/interrater-and-intrarater-reliability-of-fdi-criteria-applied-to-photographs-of-posterior-tooth-colored-restorations
#18
Dohyun Kim, So-Yeon Ahn, Junyoung Kim, Sung-Ho Park
STATEMENT OF PROBLEM: Since 2007, the FDI World Dental Federation (FDI) criteria have been used for the clinical evaluation of dental restorations. However, the reliability of the FDI criteria has not been sufficiently addressed. PURPOSE: The purpose of this study was to assess and compare the interrater and intrarater reliability of the FDI criteria by evaluating posterior tooth-colored restorations photographically. MATERIAL AND METHODS: A total of 160 clinical photographs of posterior tooth-colored restorations were evaluated independently by 5 raters with 9 of the FDI criteria suitable for photographic evaluation...
December 23, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28024816/zirconia-changes-after-grinding-and-regeneration-firing
#19
Gabriel R Hatanaka, Gabriela S Polli, Laiza M G Fais, José Maurício Dos S N Reis, Lígia A P Pinelli
STATEMENT OF PROBLEM: Despite improvements in computer-aided design and computer-aided manufacturing (CAD-CAM) systems, grinding during either laboratory procedures or clinical adjustments is often needed to modify the shape of 3 mol(%) yttria-tetragonal zirconia polycrystal (3Y-TZP) restorations. However, the best way to achieve adjustment is unclear. PURPOSE: The purpose of this in vitro study was to evaluate the microstructural and crystallographic phase changes, flexural strength, and Weibull modulus of a 3Y-TZP zirconia after grinding with or without water cooling and regeneration firing...
December 23, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28024815/fit-of-pressed-crowns-fabricated-from-two-cad-cam-wax-pattern-process-plans-a-comparative-in%C3%A2-vitro-study
#20
Loubna Shamseddine, Rola Mortada, Khaldoun Rifai, Jose Johann Chidiac
STATEMENT OF PROBLEM: Subtractive and additive computer-aided design and computer-aided manufacturing (CAD-CAM) wax pattern processing are 2 methods of fabricating a pressed ceramic crown. Whether a subtractive milled wax pattern or a pattern from the micro-stereolithography additive process produces lithium disilicate crowns with better marginal and internal fit is unclear. MATERIALS AND METHODS: Ten silicone impressions were made for a prepared canine tooth. Each die received 2 lithium disilicate (IPS e...
December 23, 2016: Journal of Prosthetic Dentistry
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