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Journal of Prosthetic Dentistry

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https://www.readbyqxmd.com/read/28720340/mechanical-strength-and-fracture-point-of-a-dental-implant-under-certification-conditions-a-numerical-approach-by-finite-element-analysis
#1
Guillermo de la Rosa Castolo, Sonia V Guevara Perez, Pierre-Jean Arnoux, Laurent Badih, Franck Bonnet, Michel Behr
STATEMENT OF PROBLEM: Implant prosthodontics provides high-quality outcomes thanks to recent technological developments and certification procedures such as International Organization for Standardization (ISO) standard 14801. However, these certification tests are costly, and the result is highly uncertain as the influence of design variables (materials and structure) is still unknown. The design process could be significantly improved if the influence of design parameters were identified...
July 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28720339/in%C3%A2-vitro-fit-of-cad-cam-complete-arch-screw-retained-titanium-and-zirconia-implant-prostheses-fabricated-on-4-implants
#2
Hadi Al-Meraikhi, Burak Yilmaz, Edwin McGlumphy, William Brantley, William M Johnston
STATEMENT OF PROBLEM: Computer-aided designed and computer-aided manufactured (CAD-CAM) titanium and zirconia implant-supported fixed implant prostheses on 4 implants have become popular. The precision and accuracy of their interface fit has not been widely researched. PURPOSE: The purpose of this in vitro study was to compare the marginal fit of zirconia and titanium implant-supported screw-retained CAD-CAM complete fixed dental prostheses (CFDP) fit with a standardized cast simulating the all-on-4 implant distribution...
July 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28720338/complete-denture-fabrication-using-piezography-and-cad-cam-a-clinical-report
#3
Chikahiro Ohkubo, Hidemasa Shimpo, Ai Tokue, Eun-Jin Park, Tae Hyung Kim
To provide maxillary and mandibular complete dentures for a patient with severe ridge resorption, the denture space was recorded using the piezography technique. After the piezographic space was scanned, a virtual tooth arrangement and festooning were performed within the space using computer-aided design software. The denture bases were milled from a polymethylmethacrylate resin block using computer-aided manufacturing, and commercially available denture teeth were bonded with resin adhesive. Using the piezography technique described, physiologically appropriate complete dentures were fabricated based on the neutral zone concept...
July 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28709681/customized-locator-abutment-fabrication-on-inclined-implants-a-clinical-report
#4
Hee-Chul Kim, Janghyun Paek
Implant parallelism is rarely achieved, particularly when anatomic limitations are present. The problem of nonparallel implants has been addressed by using angled or bar abutments to compensate for the implant angulation. However, an angled abutment or bar attachment has disadvantages in terms of cost, laboratory process, and the maintenance of oral hygiene. In this clinical report, a solution for the management of an inclined implant is presented by using customized locator abutment fabricated by computer-aided design and computer-aided manufacturing (CAD-CAM)...
July 11, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28709680/patient-satisfaction-with-laser-sintered-removable-partial-dentures-a-crossover-pilot-clinical-trial
#5
Balqees Almufleh, Elham Emami, Omar Alageel, Fabiana de Melo, Francois Seng, Eric Caron, Samer Abi Nader, Ashwaq Al-Hashedi, Rubens Albuquerque, Jocelyne Feine, Faleh Tamimi
STATEMENT OF PROBLEM: Clinical data regarding newly introduced laser-sintered removable partial dentures (RPDs) are needed before this technique can be recommended. Currently, only a few clinical reports have been published, with no clinical studies. PURPOSE: This clinical trial compared short-term satisfaction in patients wearing RPDs fabricated with conventional or computer-aided design and computer-aided manufacturing (CAD-CAM) laser-sintering technology. MATERIAL AND METHODS: Twelve participants with partial edentulism were enrolled in this pilot crossover double-blinded clinical trial...
July 11, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28709679/the-all-on-4-modified-polyetheretherketone-treatment-approach-a-clinical-report
#6
Panagiotis Zoidis
A modified polyetheretherketone (PEEK) implant framework material in combination with prefabricated high-impact poly(methyl methacrylate) (PMMA) veneers was used as an alternative material for the fabrication of a complete maxillary arch implant-supported fixed restoration. The elastic performance of the PEEK framework (elastic modulus of 4 GPa) combined with PMMA veneers may reduce the occlusal forces, protecting the implant-supported restoration and the opposing dentition, especially in all-on-4 treatments, where lack of proprioception and wide interimplant distance are present...
July 11, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28709678/annual-review-of-selected-scientific-literature-report-of-the-committee-on-scientific-investigation-of-the-american-academy-of-restorative-dentistry
#7
REVIEW
Terence E Donovan, Riccardo Marzola, Kevin R Murphy, David R Cagna, Frederick Eichmiller, James R McKee, James E Metz, Jean-Pierre Albouy, Mathias Troeltzsch
This review was conducted to assist the busy dentist in keeping abreast of the latest scientific information regarding the clinical practice of dentistry. Each of the authors, who are considered experts in their disciplines, was asked to peruse the scientific literature in their discipline published in 2016 and review the articles for important information that may affect treatment decisions. Comments on experimental methodology, statistical evaluation, and the overall validity of conclusions are included with many of the reviews...
July 11, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28709677/functional-and-esthetic-restorative-treatment-with-preheated-resins-in-a-patient-with-ectodermic-dysplasia-a-clinical-report
#8
José M Olivares, Alonso Hidalgo, Juan P Pavez, Dafna Benadof, Roberto Irribarra
Ectodermal dysplasia is a heterogeneous genetic condition affecting 1.6 to 22 per 100000 people. Oral manifestations associated with this condition include hyperdontia, hypodontia, microdontia, and conical teeth. Traditional treatment consists of a combination of orthodontic and rehabilitation therapies. The initial treatment stage uses removable prostheses and interim crowns for long periods, thus increasing risks for developing secondary caries. This clinical report describes the use of direct composite resin bonding with preheated compactable resins applied to vacuum-formed trays filled with clear silicone...
July 11, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28709676/fracture-load-of-complete-arch-implant-supported-prostheses-reinforced-with-nylon-silica-mesh-an-in%C3%A2-vitro-study
#9
Fernanda de Cássia Papaiz Gonçalves, Marina Amaral, Alexandre Luiz Souto Borges, Luiz Fernando Martins Gonçalves, Tarcisio José de Arruda Paes-Junior
STATEMENT OF PROBLEM: Complete-arch implant-supported prostheses without a framework have a high risk of failure: a straightforward and inexpensive reinforcement material, such as nylon mesh, could improve their longevity. PURPOSE: The purpose of this in vitro study was to evaluate a nylon-silica mesh compound on the fracture strength of acrylic resin and the fracture load of complete-arch implant-supported prostheses. MATERIAL AND METHODS: Twenty-four complete mandibular arch implant-supported prostheses were divided into 2 groups according to cantilever length (molar and premolar) and subdivided into another 2 subgroups according to the presence or absence of reinforcing mesh...
July 11, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28709675/a-digital-technique-for-fabricating-implant-supported-interim-restorations-in-the-esthetic-zone
#10
Xiaoqiang Liu, Yao Tan, Jianzhang Liu, Jianguo Tan
A digital technique for fabricating an implant-supported interim restoration is presented. The labial cervical architecture of the natural tooth is captured before extraction and registered to form the emergence profile of the interim restoration. A well-contoured interim restoration is fabricated before surgery and connected to the immediately placed implant with a customized interim abutment.
July 11, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28709674/accuracy-of-cad-cam-fabricated-removable-partial-dentures
#11
Christin Arnold, Jeremias Hey, Ramona Schweyen, Jürgen M Setz
STATEMENT OF PROBLEM: The conventional fabrication of removable partial dentures (RPDs) is a complex, error-prone, time-consuming, and expensive process. The use of computer-aided design and computer-aided manufacturing (CAD-CAM) techniques, especially rapid prototyping, promises a more effective method for fabricating RPD frameworks. PURPOSE: The purpose of this in vitro study was to evaluate the fit of RPD clasps fabricated by means of 4 different CAD-CAM-systems and to compare those fittings with that of the conventional lost-wax casting technique (LWT)...
July 11, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28709673/stereophotogrammetric-impression-making-for-polyoxymethylene-milled-immediate-partial-fixed-dental-prostheses
#12
Miguel Gómez-Polo, Cristina Gómez-Polo, Jaime Del Río, Rocío Ortega
Immediate post-extraction and same-day placement of interim prostheses have increased patient acceptance of implant-supported prostheses. However, for immediate prostheses supported by multiple implants, meeting passive fit and esthetic standards is often challenging. In this clinical report, implant photogrammetry was combined with conventionally obtained digitized casts to prepare an interim, milled prosthesis from a polyoxymethylene (POM) disk, using computer-aided design and computer-aided manufacturing techniques...
July 11, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28709672/evaluation-of-color-stability-of-preshaded-and-liquid-shaded-monolithic-zirconia
#13
Aikaterini Papageorgiou-Kyrana, Maria Kokoti, Eleana Kontonasaki, Petros Koidis
STATEMENT OF PROBLEM: The effect of thermal aging on the color stability of monolithic zirconia has not been thoroughly investigated. PURPOSE: The purpose of this in vitro study was to evaluate the color stability before and after thermal cycling of monolithic zirconia specimens, which were either preshaded or characterized in the laboratory through the assessment of color parameters L*, a*, and b*. MATERIAL AND METHODS: A total of 80 specimens (10×10×15 mm) were prepared from zirconia disks (BruxZir) and divided into 2 groups...
July 11, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28689915/a-3-year-clinical-evaluation-of-endodontically-treated-posterior-teeth-restored-with-two-different-materials-using-the-cerec-ac-chair-side-system
#14
Ting Lu, Ling Peng, Fu Xiong, Xiao-Yu Lin, Ping Zhang, Zhi-Ting Lin, Bu-Ling Wu
STATEMENT OF PROBLEM: The introduction of polymer-infiltrated ceramic network (PICN) materials may provide more options for dentists in restoring short clinical crowns and extensively damaged posterior teeth, but clinical data for their performance are lacking. PURPOSE: The purpose of this clinical study was to compare the 3-year performance and survival rates of PICN material with those of conservative ceramic onlay restorations for endodontically treated posterior teeth using the CEREC AC chair-side system...
July 7, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28689913/a-technique-for-immediately-restoring-single-dental-implants-with-a-cad-cam-implant-supported-crown-milled-from-a-poly-methyl-methacrylate-block
#15
Periklis Proussaefs, Abdulaziz AlHelal
This technique is used when a single dental implant is placed. A stent made of autopolymerized acrylic resin was used to transfer the implant position to the laboratory. Once the implant position was transferred, the stone cast was scanned, and a computer-aided design and computer-aided manufacturing (CAD-CAM) interim implant-supported crown was milled from a poly(methyl methacrylate) (PMMA) block. A titanium insert, in contact with the implant platform and not the PMMA material, was used to support the crown...
July 7, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28689912/influence-of-scanner-powder-application-and-adjustments-on-cad-cam-crown-misfit
#16
Marcel S Prudente, Letícia R Davi, Kemilly O Nabbout, Célio J Prado, Leandro M Pereira, Karla Zancopé, Flávio D Neves
STATEMENT OF PROBLEM: The manufacturers of computer-aided design and computer-aided manufacturing (CAD-CAM) systems emphasize that new technologies can improve the marginal fit of dental crowns. However, data supporting this claim are limited. PURPOSE: The purpose of this in vitro study was to investigate the differences among the following fabrication methods on the marginal discrepancy of dental crowns: intraoral optical scanners, powder application, and adjustments of intaglio surface...
July 7, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28689911/effect-of-grinding-and-polishing-on-roughness-and-strength-of-zirconia
#17
Waad Khayat, Najla Chebib, Matthew Finkelman, Samer Khayat, Ala Ali
STATEMENT OF PROBLEM: The clinical applications of high-translucency monolithic zirconia restorations have increased. Chairside and laboratory adjustments of these restorations are inevitable, which may lead to increased roughness and reduced strength. The influence of grinding and polishing on high-translucency zirconia has not been investigated. PURPOSE: The purpose of this in vitro study was to compare the roughness averages (Ra) of ground and polished zirconia and investigate whether roughness influenced strength after aging...
July 7, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28689910/management-of-postburn-perioral-contracture-using-a-customized-static-commissural-splint-and-intralesional-injections-of-triamcinolone
#18
Saurav Kumar, Sanjeev Harbansh Gupta, M Viswambaran, Arpreeta Sachdeva, B P Panda
A perioral facial burn is usually accompanied by a reduction in size of the oral orifice because of the contraction of the healing wound. Perioral contracture leads to microstomia, restricting nutrition, speech, and jaw movements and impairing the esthetic appearance of the face. It is imperative to introduce splints as early as possible to prevent the postburn sequelae. A delay in splinting allows postburn contractures. Overcoming these contractures to regain the size of the stoma requires restructuring of the hypertrophic scar using mechanical force and the biomodification of the tissues...
July 7, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28689907/a-digitally-guided-dual-technique-for-both-gingival-and-bone-resection-during-crown-lengthening-surgery
#19
Xiaoqiang Liu, Jingting Yu, Jianfeng Zhou, Jianguo Tan
This paper presents a digitally guided dual technique that provides references for gingival and bone resection during crown lengthening surgery. The architecture of the teeth, gingiva, and alveolar bone is scanned and registered to design dual guides consisting of a gingivectomy guide and an alveolectomy guide that are used in periodontal surgery for esthetic rehabilitation.
July 7, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28689906/comparison-of-digital-intraoral-scanner-reproducibility-and-image-trueness-considering-repetitive-experience
#20
Jung-Hwa Lim, Ji-Man Park, Minji Kim, Seong-Joo Heo, Ji-Yun Myung
STATEMENT OF PROBLEM: Because the digital workflow can begin directly in the oral cavity, intraoral scanners are being adopted in dental treatments. However, studies of the relationship between the experience of the practitioner and the accuracy of impression data are needed. PURPOSE: The purpose of this clinical study was to investigate the effect of the experience curve on changes in trueness when a patient's complete dental arch is scanned. MATERIAL AND METHODS: Twenty dental hygienists with more than 3 years of experience in dental clinical practice (group 1 had 3 to 5 years; group 2 had >6 years) were recruited to learn to operate 2 intraoral scanner systems...
July 7, 2017: Journal of Prosthetic Dentistry
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