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Journal of Prosthetic Dentistry

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https://www.readbyqxmd.com/read/29310881/comparison-between-masticatory-index-and-mixing-index-among-complete-denture-wearers-and-associated-factors-a-multivariate-analysis
#1
Hala A Elmoula, Nadia Khalifa, Mohammed Nasser Alhajj
STATEMENT OF PROBLEM: Masticatory performance is an important and complex multifactorial process in clinical practice. An exploration of the relationships and effects of the associated factors is lacking. PURPOSE: This clinical survey compared masticatory efficiency (mixing index) with perceived masticatory ability (masticatory index) among complete denture wearers and sought to clarify the relationship between these indices and other factors. MATERIALS AND METHODS: The study consisted of 58 complete denture wearers (37 men, 21 women) ranging between 37 and 80 years of age...
January 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29310880/the-hemi-engaging-fixed-dental-implant-prosthesis-a-technique-for-improved-stability-and-handling
#2
Todd R Schoenbaum, Richard G Stevenson, Eric Balinghasay
Clinicians commonly contend that the screw-retained, implant-supported fixed dental prosthesis (FDP) should be fabricated with all nonengaging abutments to allow for the inherent nonparallelism of the implants and the inability of the abutment connections to draw together during insertion and removal. The problem with a fully nonengaging FDP is difficulty in handling and more strain on the abutment screws, ultimately leading to increased rates of breakage and loosening. The hemi-engaging FDP design regains much of the advantage afforded by the internal connection and improves prosthetic handing both clinically and in the laboratory...
January 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29310879/fracture-analysis-of-cad-cam-high-density-polymers-used-for-interim-implant-supported-fixed-cantilevered-prostheses
#3
Burak Yilmaz, Gülce Alp, Jeremy Seidt, William M Johnston, Roger Vitter, Edwin A McGlumphy
STATEMENT OF PROBLEM: The load-to-fracture performance of computer-assisted design and computer-assisted manufacturing (CAD-CAM) high-density polymer (HDP) materials in cantilevers is unknown. PURPOSE: The purposes of this in vitro study were to evaluate the load-to-fracture performance of CAD-CAM-fabricated HDPs and to compare that with performance of autopolymerized and injection-molded acrylic resins. MATERIAL AND METHODS: Specimens from 8 different brands of CAD-CAM HDPs, including Brylic Solid (BS); Brylic Gradient (BG); AnaxCAD Temp EZ (AE); AnaxCAD Temp Plus (AP); Zirkonzahn Temp Basic (Z); GDS Tempo-CAD (GD); Polident (Po); Merz M-PM-Disc (MAT); an autopolymerized acrylic resin, Imident (Conv) and an injection-molded acrylic resin, SR-IvoBase High Impact (Inj) were evaluated for load-to-fracture analysis (n=5)...
January 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29310878/optical-behaviors-of-esthetic-cad-cam-restorations-after-different-surface-finishing-and-polishing-procedures-and-uv-aging-an-in%C3%A2-vitro-study
#4
Hamiyet Kilinc, Sedanur Turgut
STATEMENT OF PROBLEM: Esthetic computer-aided design and computer-aided manufacturing (CAD-CAM) materials have various chemical compositions and can be prepared by using different finishing and polishing procedures. Their optical properties may change over time, depending on these factors. However, information about their stain resistance is still scarce. PURPOSE: The purpose of this in vitro study was to evaluate the optical properties of esthetic CAD-CAM materials after different finishing and polishing procedures and ultraviolet (UV) aging...
January 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29310877/effects-of-different-peracetic-acid-formulations-on-post-space-radicular-dentin
#5
Lauriê Garcia Belizário, Milton Carlos Kuga, Gabriela Mariana Castro-Núñez, Wilfredo Gustavo Escalante-Otárola, Marcus Vinicius Reis Só, Jefferson Ricardo Pereira
STATEMENT OF PROBLEM: The optimal irrigating solution with antimicrobial and dentin cleansing properties for post space preparation for fiber posts is unclear. Peracetic acid is one option but is available in various chemical formulations that require evaluation. PURPOSE: The purpose of this in vitro study was to evaluate dentin surface cleanliness based on the presence of a smear layer and the number of open dentin tubules. It also investigates the chemical composition of residues after canal irrigation with a 1% peracetic acid solution (PA) at low or high concentration of hydrogen peroxide during the preparation of intracanal fiber posts...
January 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29310876/effect-of-ceramic-material-and-resin-cement-systems-on-the-color-stability-of-laminate-veneers-after-accelerated-aging
#6
Seong-Min Lee, Yu-Sung Choi
STATEMENT OF PROBLEM: Laminate veneers are susceptible to color change during clinical service. Studies that compare the effects of different ceramic and resin cement systems on color stability are lacking. PURPOSE: The purpose of this in vitro study was to evaluate the color stability of laminate veneers after accelerated aging using different ceramic and resin cement systems. MATERIAL AND METHODS: Ceramic specimens (N=168; shade A1; thickness, 0...
January 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29310875/comparison-of-the-mechanical-properties-of-translucent-zirconia-and-lithium-disilicate
#7
Sung Joon Kwon, Nathaniel C Lawson, Edward E McLaren, Amir H Nejat, John O Burgess
STATEMENT OF PROBLEM: Three mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) possesses excellent mechanical properties but is relatively opaque. Five mol% yttria-stabilized zirconia polycrystal (5Y-ZP) offers improved translucency, but many of its clinical properties have not been compared with those of 3Y-TZP and lithium disilicate. PURPOSE: The purpose of this in vitro study was to compare the flexural strength, translucency parameter, bond strength, and enamel and material wear of 5Y-ZP (Katana UTML) with 3Y-TZP (Katana HT) and lithium disilicate (e...
January 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29310874/disinfection-of-polyvinyl-siloxane-impression-material-by-gaseous-ozone
#8
Hakki Celebi, Emine Begüm Büyükerkmen, Emrah Torlak
STATEMENT OF PROBLEM: Impression materials must be disinfected to avoid cross-contamination before they are sent to the dental laboratory. However, whether aqueous state disinfectants affect material wettability is unclear. PURPOSE: The purpose of this in vitro study was to compare the efficacy of gaseous ozone and sodium hypochlorite (NaOCl) in disinfecting light-body consistency hydrophilized polyvinyl siloxane (PVS) impression specimens inoculated with a cocktail of Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Enterococcus faecalis...
January 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29273236/effect-of-tooth-substrate-and-porcelain-thickness-on-porcelain-veneer-failure-loads-in-vitro
#9
Chunling Ge, Chad C Green, Dalene A Sederstrom, Edward A McLaren, James A Chalfant, Shane N White
STATEMENT OF PROBLEM: Bonded porcelain veneers are widely used esthetic restorations. High success and survival rates have been reported, but failures do occur. Fractures are the commonest failure mode. Minimally invasive or thin veneers have gained popularity. Increased enamel and porcelain thickness improve the strength of veneers bonded to enamel, but less is known about dentin or mixed substrates. PURPOSE: The purpose of this in vitro study was to measure the influences of tooth substrate type (all-enamel, all-dentin, or half-dentin-half-enamel) and veneer thickness on the loads needed to cause initial and catastrophic porcelain veneer failure...
December 19, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29258693/contemporary-management-and-full-mouth-rehabilitation-of-a-patient-with-sj%C3%A3-gren-syndrome
#10
Francois Fisselier, A Alper Comut
Sjögren syndrome is a chronic autoimmune disorder with xerostomia, increased tooth wear, high rates of caries, and repeated failure of dental restorations as the main oral symptoms. These render the prosthetic treatment challenging. This clinical report describes a contemporary approach to the treatment of a patient with Sjögren syndrome using translucent multilayered monolithic zirconia restorations and focuses on the treatment protocols before, during, and after the prosthetic treatment.
December 16, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29258692/fabrication-of-a-nonmetal-clasp-denture-supported-by-an-intraoral-scanner-and-cad-cam
#11
Ippei Hamanaka, Kota Isshi, Yutaka Takahashi
This clinical report describes the management of a patient who had a metal allergy and had difficulty sitting in a dental chair for an extended period. The presented treatment used an intraoral scanner and computer-aided design and computer-aided manufacturing (CAD-CAM) to fabricate a nonmetal clasp denture. The described procedure may reduce patient discomfort and chair-time.
December 16, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29258691/flasking-technique-with-alum-crystals-for-fabricating-definitive-hollow-bulb-obturators
#12
Dipal P Mawani, B C Muddugangadhar, Arindam Das, Vishal Kothari
Different techniques have been described for fabricating obturators for patients with maxillary defects. The hollow bulb obturator has emerged as the treatment of choice in most patients owing to its light weight, cleanliness, and ease of fabrication. This article presents a simplified flasking technique for fabricating a definitive, closed, hollow bulb obturator by using a potassium alum crystal.
December 16, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29195823/quantitative-percussion-diagnostics-as-an-indicator-of-the-level-of-the-structural-pathology-of-teeth-retrospective-follow-up-investigation-of-high-risk-sites-that-remained-pathological-after-restorative-treatment
#13
Cherilyn G Sheets, Jean C Wu, James C Earthman
STATEMENT OF PROBLEM: Structural damage may remain even after a tooth is restored. Conventional diagnostic aids do not quantify the severity of structural damage or allow the monitoring of structural changes after restoration. PURPOSE: The purpose of this retrospective clinical study was to provide an in-depth analysis of 9 high-risk sites after restoration. The analysis followed structural defects found upon disassembly, restorative materials used, therapeutic procedures provided, current longevity, and long-term quantitative percussion diagnostics (QPD) to monitor results...
November 29, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29195822/effect-of-crosslinkers-on-bond-strength-stability-of-fiber-posts-to-root-canal-dentin-and-in-situ-proteolytic-activity
#14
Juliana R L Alonso, Fernanda G Basso, Débora L S Scheffel, Carlos Alberto de-Souza-Costa, Josimeri Hebling
STATEMENT OF PROBLEM: Improved stability of the adhesive interface can be obtained using crosslinkers. However, research on the use of crosslinkers in root dentin is lacking. PURPOSE: The purpose of this in vitro study was to evaluate the effect of crosslinkers on the proteolytic activity of root dentin and on the bond strength of resin-cemented fiber posts. MATERIAL AND METHODS: Single root canals were obtained from premolars (n=48) and endodontically treated before being divided into 4 groups: deionized water (control), 0...
November 29, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29195821/early-implant-placement-for-a-patient-with-ectodermal-dysplasia-thirteen-years-of-clinical-care
#15
Lisa A Knobloch, Peter E Larsen, Paola C Saponaro, Emilie L'Homme-Langlois
Patients with ectodermal dysplasia have abnormalities of 2 or more structures that originate from the ectoderm. The oral manifestations often include the congenital absence of teeth and malformed teeth. This clinical report describes the interdisciplinary care from childhood through the definitive dental rehabilitation completed at skeletal maturation to replace the missing teeth in a patient with ectodermal dysplasia. Treatment began at 9 years of age with an implant-assisted mandibular overdenture to improve function and replace the missing mandibular teeth...
November 29, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29195820/modified-retention-and-stability-criteria-for-complete-denture-wearers-a-risk-assessment-tool-for-impaired-masticatory-ability-and-oral-health-related-quality-of-life
#16
Nareudee Limpuangthip, Tewarit Somkotra, Mansuang Arksornnukit
STATEMENT OF PROBLEM: Some complete denture wearers report difficulty with daily activities, especially activities related to denture retention and stability. However, no standard criteria are available for professionally based assessment of complete denture quality. PURPOSE: The purpose of this clinical study was to determine the association between professionally based assessment of complete denture quality, evaluated by conventional and Chulalongkorn University (CU)-modified Kapur criteria and multiple patient-based outcomes: oral health-related quality of life (OHRQoL), eating satisfaction, and masticatory performance...
November 29, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29195819/a-modified-technique-for-the-intraoral-assessment-of-static-occlusal-contacts
#17
Kelvin I Afrashtehfar, Urs Brägger, Kensuke Igarashi, Urs C Belser
This article describes a procedure in which articulating paper is modified for the intraoral assessment of static occlusal contacts. The rectangular-shaped articulating paper is modified by creating parallel cuts at 2- to 3-mm intervals perpendicular to its long side without completely separating the paper. This modification may improve the accuracy in determining occlusal contacts and therefore facilitate an occlusal adjustment procedure.
November 29, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29195818/defining-the-ascending-ramus-a-search
#18
REVIEW
Gary Goldstein, Santvana Vyas
STATEMENT OF PROBLEM: Lack of an accepted definition for the ascending ramus of the mandible means no common reference point is available for clinical or research dialogue. PURPOSE: The purpose of this review was to determine whether the ascending ramus has been defined, by using a search of published studies. MATERIAL AND METHODS: PubMed was searched, using terms "ascending ramus" and "mandible." RESULTS: The search found no acceptable definition of the ascending ramus of the mandible...
November 29, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29195817/radial-plane-tooth-position-and-bone-wall-dimensions-in-the-anterior-maxilla-a-cbct-classification-for-immediate-implant-placement
#19
Howard Gluckman, Carla Cruvinel Pontes, Jonathan Du Toit
STATEMENT OF PROBLEM: The biological and esthetic challenge of the post-extraction ridge is relevant to restorative implant dentistry, most significantly in the anterior esthetic zone. Previous authors have discussed facial bone wall dimensions and classified their variations. A reclassification may be pertinent. PURPOSE: The purpose of this observational, clinical study was to introduce a new classification system for anterior maxilla tooth position with guidelines for immediate implant placement...
November 29, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29195816/mechanical-properties-of-resin-ceramic-cad-cam-materials-after-accelerated-aging
#20
Caleb Blackburn, Hailee Rask, Abdallah Awada
STATEMENT OF PROBLEM: The development of polymer-based computer-aided design and computer-aided manufacturing (CAD-CAM) milling bocks and the limited availability of independent studies on these materials make it pertinent to evaluate changes in their mechanical properties after simulated aging to identify strengths and limitations. PURPOSE: The purpose of this in vitro study was to measure the effect of thermocycling on the flexural properties of ceramic, resin, and resin-ceramic CAD-CAM materials...
November 29, 2017: Journal of Prosthetic Dentistry
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