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Journal of Prosthetic Dentistry

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https://www.readbyqxmd.com/read/30442377/accuracy-of-surgical-guides-from-2-different-desktop-3d-printers-for-computed-tomography-guided-surgery
#1
Björn Gjelvold, Deyar Jallal Hadi Mahmood, Ann Wennerberg
STATEMENT OF PROBLEM: Different factors influence the degree of deviation in dental implant position after computed tomography-guided surgery. The surgical guide-manufacturing process with desktop 3D printers is such a factor, but its accuracy has not been fully evaluated. PURPOSE: The purpose of this in vitro study was to evaluate the deviation in final dental implant position after the use of surgical guides fabricated from 2 different desktop 3D printers using a digital workflow...
November 12, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30409724/repair-bond-strength-and-nanoleakage-of-artificially-aged-cad-cam-composite-resin
#2
Carmen Arpa, Laura Ceballos, María Victoria Fuentes, Jorge Perdigão
STATEMENT OF PROBLEM: The polymerization of computer-aided design and computer-aided manufacturing (CAD-CAM) composite resins during their manufacture enhances their physical properties and biocompatibility but might compromise their reparability. PURPOSE: The purpose of this in vitro study was to determine the microtensile bond strength and nanoleakage (NL) of aged LAVA Ultimate (LU) CAD-CAM composite resin after different repair protocols. MATERIAL AND METHODS: Fifty-eight LU miniblocks were prepared, thermocycled (10000 cycles, 5°C to 55°C), and assigned to 10 surface pretreatment and bonding protocols: (1) tribochemical silica coating (CoJet, CoJet Sand; 3M ESPE)+Scotchbond Universal Adhesive (SBU; 3M ESPE); (2) CoJet+silane (SI, ESPE Sil; 3M ESPE)+Adper Scotchbond 1 XT Adhesive (XT; 3M ESPE); (3) CoJet+10-methacryloyloxydecyl dihydrogen phosphate-based silane (MO; Monobond Plus; Ivoclar Vivadent)+XT; (4) CoJet+XT; (5) 30-μm alumina airborne-particle abrasion (AL)+SBU; (6) AL+SI+XT; (7) AL+MO+XT; (8) AL+XT; (9) no pretreatment+SBU; and (10) no pretreatment+XT...
November 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30409723/biological-activation-of-bone-grafts-using-injectable-platelet-rich-fibrin
#3
Rucha Shah, Triveni Mavinakote Gowda, Raison Thomas, Tarun Kumar, Dhoom Singh Mehta
Platelet-rich fibrin (PRF) is gaining acceptance as a bioactive surgical additive in regenerative dentistry. However, PRF has only been available in gel or membrane form and is not suitable for injection. Recently, however, a liquid, injectable PRF has been introduced. This paper introduces the concept of injectable PRF and discusses its applications for biologic activation of bone grafts.
November 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30409722/computer-based-implant-planning-involving-a-prefabricated-custom-tray-with-alumina-landmark-structures
#4
Jong-Eun Kim, Ji-Hyun Park, Jee-Hwan Kim, June-Sung Shim
The purpose of this technical report was to describe a method for the fabrication of a custom tray with landmark structures to coordinate cone beam computed tomography and scan data for use in guided implant surgery in patients with numerous artifact-causing metal prostheses. The fabricated custom tray can be used to coordinate cone beam computed tomography data and scan data from the dentition, as well as to fabricate the prostheses.
November 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30409721/effect-of-different-times-of-nonthermal-argon-plasma-treatment-on-the-microtensile-bond-strength-of-self-adhesive-resin-cement-to-yttria-stabilized-tetragonal-zirconia-polycrystal-ceramic
#5
Alexandre Barboza Elias, Renata Antoun Simão, Maíra Prado, Paulo Francisco Cesar, Glauco Botelho Dos Santos, Eduardo Moreira da Silva
STATEMENT OF PROBLEM: Nonthermal argon plasma may increase the surface energy of yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) dental ceramics. However, studies that evaluated the effect of increased plasma treatment times on the bond strength of resin cements to Y-TZP ceramics are lacking. PURPOSE: The purpose of this in vitro study was to evaluate the effect of different nonthermal argon plasma (NTAP) treatment times on the surface energy and bond strength of a self-adhesive resin cement to Y-TZP ceramic...
November 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30396712/restoration-of-a-single-darkened-central-incisor-with-a-modified-ceramic-veneer
#6
Luis G B Albino, Eduardo T Chaves, Verônica P Lima, Giana S Lima
Restoring a single darkened central incisor can be challenging. Both direct and indirect options may be acceptable to mask discoloration and achieve functional requirements. This report describes placement of a modified feldspathic porcelain veneer to reproduce the appearance of a maxillary central incisor discolored after trauma.
November 2, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30396711/retrospective-analysis-of-porous-tantalum-trabecular-metal-enhanced-titanium-dental-implants
#7
Alexander R Edelmann, Devang Patel, Riley K Allen, Chad J Gibson, Al M Best, Sompop Bencharit
STATEMENT OF PROBLEM: The design of porous tantalum trabecular metal-enhanced titanium (TM) dental implants promises improved osseointegration, especially when grafting materials such as demineralized bone matrix are used; however, studies are lacking. PURPOSE: The purpose of this retrospective study was to compare TM implants with conventional titanium alloy (Ti) implants with and without demineralized bone matrix in terms of peri-implant bone remodeling in the first year after implant loading...
November 2, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30396710/use-of-a-dental-surveyor-to-ensure-optimal-seating-of-implant-overdenture-attachments
#8
Robert W Loney, Chris J Lee, Pierre-Luc Michaud, Tanya J A Cook
Many implant overdenture attachments accommodate divergent abutments. However, there can be instances where the denture base resin surrounding the abutment may impede seating by binding on the axial surface(s) of the abutment. This article describes the use of a dental surveyor to aid clinicians in determining where the resin denture base might be preventing the seating of overdenture attachments. The surveyor can be used for judicious adjustment to allow optimal seating of the attachments.
November 2, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30396709/accuracy-of-three-digital-workflows-for-implant-abutment-and-crown-fabrication-using-a-digital-measuring-technique
#9
Stephanie Zeller, David Guichet, Elias Kontogiorgos, William W Nagy
STATEMENT OF PROBLEM: The accuracy of a full digital workflow using an Atlantis abutment and a milled zirconia crown; a full digital workflow with a 3Shape split-file workflow using a zirconia abutment and crown; and an interrupted digital workflow using an Atlantis abutment and a milled zirconia crown is unclear. PURPOSE: The purpose of this in vitro study was to compare 2 full digital workflows relative to an interrupted workflow for restoring an implant with a custom abutment and crown...
November 2, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30396708/randomized-controlled-clinical-trial-of-digital-and-conventional-workflows-for-the-fabrication-of-zirconia-ceramic-fixed-partial-dentures-part-iii-marginal-and-internal-fit
#10
Goran I Benic, Irena Sailer, Marco Zeltner, Janine N Gütermann, Mutlu Özcan, Sven Mühlemann
STATEMENT OF PROBLEM: Trials comparing the overall performances of digital and conventional workflows in restorative dentistry are lacking. PURPOSE: The purpose of the third part of this clinical study was to test whether the fit of zirconia 3-unit frameworks for fixed partial dentures fabricated with fully digital workflows differed from that of metal frameworks fabricated with the conventional workflow. MATERIAL AND METHODS: In each of 10 participants, 4 fixed-partial-denture frameworks were fabricated for the same abutment teeth according to a randomly generated sequence...
November 2, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30396707/bond-strength-durability-of-self-adhesive-resin-cements-to-zirconia-ceramic-an-in-vitro-study
#11
Abdulaziz Samran, Ammar Al-Ammari, Shadi El Bahra, Esam Halboub, Sebastian Wille, Matthias Kern
STATEMENT OF PROBLEM: How contamination, cleaning, and artificial aging affect the bond strength of self-adhesive resin cements to zirconia ceramics is unclear. PURPOSE: The purpose of this in vitro study was to assess the durability and bond strength of different self-adhesive resin cements to zirconia ceramics subjected to contamination, cleaning, and aging. MATERIAL AND METHODS: A total 192 zirconia ceramic squares were airborne-particle abraded with 50 μm Al2 O3 at a pressure of 100 kPa...
November 2, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30392749/three-dimensional-printed-definitive-cast-for-a-silicone-obturator-prosthesis-a-clinical-report
#12
Charles L Palin, Joseph M Huryn, Marjorie Golden, Paul R Booth, Joseph D Randazzo
For patients with head and neck cancer requiring a maxillectomy, obturator prostheses help with quality of life. These patients routinely require adjuvant oncologic treatments with significant adverse effects. Treatment sequelae can leave patients with difficulty speaking and swallowing, reduced salivary function, reduction in maximal incisal opening, and at risk of osteoradionecrosis. A 55-year-old African-American woman presented with significant trismus and reduction in maximal incisal opening after treatment for squamous cell carcinoma of the left maxillary sinus...
November 1, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30391060/enamel-wear-and-aging-of-translucent-zirconias-in-vitro-and-clinical-studies
#13
Seung-Won Yang, Jong-Eun Kim, Yooseok Shin, June-Sung Shim, Jee-Hwan Kim
STATEMENT OF PROBLEM: Zirconia is a widely used restorative material. However, phase transformation on clinical application of zirconia has not yet been studied. PURPOSE: The purpose of this study was to evaluate the wear, surface roughness, and aging associated with polished translucent zirconia in both in vitro and clinical experiments. MATERIAL AND METHODS: In vitro experiments were performed with Rainbow and Katana zirconia blocks and natural tooth enamel as the control...
October 31, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30391059/a-comparison-of-the-marginal-and-internal-fit-of-porcelain-laminate-veneers-fabricated-by-pressing-and-cad-cam-milling-and-cemented-with-2-different-resin-cements
#14
Ziad N Al-Dwairi, Rana M Alkhatatbeh, Nadim Z Baba, Charles J Goodacre
STATEMENT OF PROBLEM: The marginal and internal adaptations of porcelain laminate veneers (PLVs) are key elements in their long-term success. However, the marginal and internal fit obtained with a pressable material compared with computer-aided design and computer-aided manufacturing (CAD-CAM) needs further investigation as does the choice of cement used. PURPOSE: The purpose of this in vitro study was to evaluate the marginal and internal fit of PLVs fabricated using pressing and CAD-CAM milling and cemented using 2 types of composite resin cement...
October 31, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30391058/wettability-of-3-different-artificial-saliva-substitutes-on-heat-polymerized-acrylic-resin
#15
Niraja Jaiswal, Pravinkumar G Patil, Arti Gangurde, Rambhau D Parkhedkar
STATEMENT OF PROBLEM: The prosthodontic problems faced by a patient with xerostomia are of great concern. To aid in retention, artificial saliva substitutes should exhibit good wettability on the denture base. PURPOSE: The purpose of this in vitro study was to evaluate the wettability of 3 different artificial saliva substitutes on heat-polymerized acrylic resin and to compare these properties with natural saliva and distilled water. MATERIAL AND METHODS: A total of 150 heat-polymerized acrylic resin specimens were prepared with 25×15×2 mm dimensions...
October 31, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30391057/in-vitro-variation-measurement-of-mandibular-denture-displacement-resistance-involving-1-to-3-implants
#16
Kaidiliya Yalikun, Manabu Kanazawa, Mariko Tanoue, Shunsuke Minakuchi
STATEMENT OF PROBLEM: Single-implant-retained mandibular overdentures (1-IODs) may be an alternative to 2-IOD for maladaptive denture patients giving comparable satisfaction, lower cost, and shorter treatment times. However, studies evaluating the effect of the number of implants on the strain exerted around the implants of IODs using strain-gauge analysis are lacking. PURPOSE: The purpose of this in vitro study was to evaluate the effect of the number of implants on the strain in an IOD under various loading and dislodging conditions...
October 31, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30391056/treatment-of-peri-implant-recession-with-a-screw-retained-interim-implant-restoration-a-clinical-report
#17
Todd R Schoenbaum, Gary S Solnit, Sam Alawie, Steven J Sadowsky
This clinical report describes a patient with an osseointegrated implant and definitive restoration of the maxillary right lateral incisor who was seeking resolution of the recession of the peri-implant tissues which revealed the underlying zirconia abutment. The patient had previously received a connective tissue graft in an unsuccessful attempt to resolve the recession. An undercontoured interim restoration that allowed for soft tissue coronal migration resolved the soft tissue deficiency.
October 31, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30391055/integration-of-intraoral-digital-impressions-with-a-3d-facial-scan-for-anterior-tooth-rehabilitation
#18
Ji-Man Park, Kyung Chul Oh, June-Sung Shim
This article describes a digital technique that combines intraoral digital impressions with a 3-dimensional facial scan to predict the outcome of prosthodontic treatment of anterior teeth at the treatment planning phase. This approach may increase patient acceptance of the definitive treatment, as the altered facial appearance is visualized with definitive prosthodontic restorations, thereby improving communication before treatment begins.
October 31, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30414647/effect-of-the-number-of-splinted-abutments-on-the-accuracy-of-zirconia-copings
#19
Min-Wuk Kim, Jong-Yub Kim, June-Sung Shim, Sunjai Kim
STATEMENT OF PROBLEM: Splinting periodontally or structurally compromised abutments is a common procedure. However, studies that investigated the effect of splinting on the accuracy of zirconia copings are lacking. PURPOSE: The purpose of this in vitro study was to evaluate the magnitude of marginal and internal gaps of zirconia copings based on the number of splinted abutments and digital scan technique. MATERIAL AND METHODS: Four maxillary acrylic resin incisors were prepared for ceramic restorations...
November 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/30414646/maxillofacial-prosthetic-rehabilitation-a-survey-on-the-quality-of-life
#20
Jeroen P J Dings, Matthias A W Merkx, Manon T P de Clonie Maclennan-Naphausen, Pascal van de Pol, Thomas J J Maal, Gert J Meijer
STATEMENT OF PROBLEM: Maxillofacial prostheses, especially those supported by endosseous implants, are regarded as a viable, secure treatment for the reconstruction of facial defects to restore quality of life. The long-term quality of life of patients treated with facial prostheses with different retentive systems is unclear. PURPOSE: The purpose of this clinical study was to assess the long-term quality of life of patients treated with facial prostheses with different retentive systems over a 14-year period at a Dutch oral and maxillofacial surgery unit...
November 2018: Journal of Prosthetic Dentistry
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