Journal of Prosthetic Dentistry RSS feed: Current Issue. The Journal of Prosthetic Dentistry , now in its 57th year, continues to be a highly respected and trusted resource. The Journal is the official publication for 25 leading U.S. international prosthodontic organizations and is the leading professional journal devoted exclusively to prosthetic and restorative dentistry. It features timely, original peer-reviewed articles on the newest techniques, dental materials, and research findings. Color photos illustrate many step-by-step procedures. The Journal serves prosthodontists and dentists in advanced practice. The Journal of Prosthetic Dentistry is the highest ranked Prosthodontics title by number of citations on the on the 2007 Journal Citation Reports®, published by Thomson Reuters.http://www.prosdent.org/?rss=yesElsevier Inc.en © 2010 The Editorial Council of the Journal of Prosthetic Dentistry. Published by Elsevier Inc. All rights reserved. Journal of Prosthetic Dentistry0022-39131033March 2010 © 2010 The Editorial Council of the Journal of Prosthetic Dentistry. Published by Elsevier Inc. All rights reserved. healthpermissions@elsevier.comhttp://www.prosdent.org/article/PIIS0022391310000326/abstract?rss=yes This report describes a clinical approach to using the zygomatic and pterygomaxillary bones to provide additional anchorage for longer implants to support an immediately functional maxillary screw-retained provisional fixed prosthesis. The purpose is to report the problems of patients who have experienced the most severe form of maxillary alveolar resorption and to demonstrate a specific protocol which provides immediately loaded implants without bone grafting. Treatment of a severely atrophic maxilla using an immediately loaded, implant-supported fixed prosthesis without the use of bone grafts: A clinical reportJeffrey S. Sherry, Thomas J. Balshi, Lawrence O. Sims, Stephen F. Balshi10.1016/S0022-3913(10)00032-6Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8133138http://www.prosdent.org/article/PIIS0022391310600200/abstract?rss=yes Statement of problem: The lighting conditions of the environment and visual deficiencies such as red-green color vision deficiency affect the clinical shade matching performance of dental professionals. Purpose: The purpose of this study was to evaluate the shade matching performance of normal and color vision-deficient dental professionals with standard daylight and tungsten illuminants. Material and methods: Two sets of porcelain disc replicas of 16 shade guide tabs (VITA Lumin) were manufactured to exact L*a*b* values by using a colorimeter. Then these twin porcelain discs (13 mm × 2.4 mm) were mixed up and placed into a color-matching cabinet that standardized the lighting conditions for the observation tests. Normal and red-green color vision-deficient dental professionals were asked to match the 32 porcelain discs using standard artificial daylight D65 (high color temperature) and tungsten filament lamp light (T) (low color temperature) illuminants. The results were analyzed by repeated-measures ANOVA and paired and independent samples t tests for the differences between dental professionals and differences between the illuminants (α=.05). Results: Regarding the sum of the correct shade match scores of all observations with both illuminants, the difference between normal vision and red-green color vision-deficient dental professional groups was not statistically significant (F=4.132; P=.054). However, the correct shade match scores of each group were significantly different for each illuminant (P<.005). The correct shade matching scores of normal color vision dental professionals were significantly higher with D65 illuminant (t=7.004; P<.001). Color matching scores of red-green color vision-deficient dental professionals (approximately 5.7 more pairs than with D65) were significantly higher with T illuminant (t=5.977; P<.001). Conclusions.: Within the limitations of this study, the shade matching performance of dental professionals was affected by color vision deficiency and the color temperature of the illuminant. The color vision-deficient group was notably unsuccessful with the D65 illuminant in shade matching. In contrast, there was a significant increase in the shade matching performance of the color vision-deficient group with T illuminant. The lower color temperature illuminant dramatically decreased the normal color vision groups' correct shade matching score. Shade matching performance of normal and color vision-deficient dental professionals with standard daylight and tungsten illuminantsHasan Suat Gokce, Bulent Piskin, Dogan Ceyhan, Sila Mermut Gokce, Volkan Arisan10.1016/S0022-3913(10)60020-0Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8139147http://www.prosdent.org/article/PIIS0022391310600212/abstract?rss=yes Statement of problem: Acidic food and sour fruits and drinks have been investigated for their destructive effects on enamel. However, their effect on porcelain restorations has not been widely examined. Purpose: The purpose of this study was to evaluate the ion leaching of porcelains immersed in acidic agents. Material and methods: Fifty-five discs (12.0 mm in diameter and 2.0 mm in thickness) were made from each of 4 types of porcelain (VITA VMK 95, Vitadur Alpha, IPS Empress Esthetic, and IPS e.max Ceram). Baseline data of elemental compositions of all storage agents were recorded. Four groups of discs (n=10) were then immersed in acidic agents (citrate buffer solution, pineapple juice, and green mango juice) and deionized water (control) at 37°C for 168 hours. One group was immersed in 4% acetic acid at 80°C for 168 hours. After immersion, fluids from all specimens for each acidic agent were measured for ion leaching with an inductively coupled plasma optical emission spectroscopy. Surface characteristics of specimens were examined using scanning electron microscopy (SEM). Data were analyzed using 3-way repeated ANOVA and Tukey HSD multiple comparisons (α=.05). Results: This study revealed that each type of porcelain had significantly leached the various ions to varying degrees after being immersed in acidic agents (P<.001 for all comparisons). SEM photomicrographs showed surface destruction of all porcelains. Conclusions: Acidic agents used in this study affected elemental dissolution of the 4 types of porcelains evaluated. The effect of acidic agents on surface ion leaching and surface characteristics of dental porcelainsBoonlert Kukiattrakoon, Chanothai Hengtrakool, Ureporn Kedjarune-Leggat10.1016/S0022-3913(10)60021-2Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8148162http://www.prosdent.org/article/PIIS0022391310600224/abstract?rss=yesAs a service to our subscribers, copies of back issues of The Journal of Prosthetic Dentistry for the preceding 5 years are maintained and are available for purchase from Elsevier, Inc until inventory is depleted. Please write to Elsevier, Inc, Subscription Customer Service, 6277 Sea Harbor Dr, Orlando, FL 32887, or call 800-654-2452 or 407-345-4000 for information on availability of particular issues and prices.Availability of Journal Back Issues10.1016/S0022-3913(10)60022-4Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8162162http://www.prosdent.org/article/PIIS0022391310600236/abstract?rss=yes Statement of problem.: Long-term fluoride application on the teeth of patients receiving radiation therapy for head and neck tumors results in excessive staining and roughening of ceramic restorations. Purpose.: The purpose of this in vitro study was to compare the staining effects of 2 fluoride treatments on ceramic disks by simulating 1 year of clinical exposure at 10 minutes per day. In addition, 2 different surface preparations were tested. Material and methods.: Eighty ceramic disks (IPS Empress), 20 × 2 mm, were fabricated. Half of the disks were glazed, and the remaining disks were polished. All disks were brushed for 3 minutes with a soft-bristle power toothbrush and mild dentifrice (baseline) and were immersed in 1 of the 2 fluoride products (0.4% SnF2, Gel-Kam Gel, or 1.1% NaF, Prevident 5000) for 10 days (n=20). Means and standard deviations of color change (ΔE), surface roughness (Ra, um), and surface gloss (GU) of the ceramic material were measured with a reflection spectrophotometer, a profilometer, and a gloss meter, respectively, at baseline and after fluoride treatment. Two- and 3-way ANOVA (α=.05), with surface preparation (polished vs. glazed) and fluoride treatment (0.4% SnF2 or 1.1% NaF) as independent variables and condition (baseline vs. after fluoride treatment) as a repeated measure, was used to analyze the data. Fisher's PLSD intervals (α=.05) were calculated for comparisons among the means. Results.: The polished specimens had significantly higher ΔE values, significantly higher surface gloss values, and significantly lower surface roughness values than the glazed specimens before fluoride treatment (P<.001). After both fluoride treatments, ceramic disks exhibited significantly higher surface roughness values when polished and significantly lower surface gloss values when glazed or polished (P<.001). The glazed specimens presented significantly higher surface roughness (P<.001) and lower surface gloss values (P<.001) when treated with 0.4% SnF2 as compared to NaF. For the polished specimens, there was no significant difference in surface roughness and surface gloss values between the 2 fluoride treatments. Conclusions.: Use of 0.4% SnF2 and 1.1% NaF gels, in vitro, caused significant color change in the polished IPS Empress ceramic disks. Polishing of the ceramic surface before immersion in either fluoride agent caused the ceramic tested to be more resistant to etching by the 2 solutions tested. The NaF caused less deterioration of the porcelain surface and was less stain inducing than SnF2. (J Prosthet Dent 2010;103:163-169) In vitro staining effects of stannous fluoride and sodium fluoride on ceramic materialIoli Ioanna Artopoulou, John M. Powers, Mark S. Chambers10.1016/S0022-3913(10)60023-6Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8163169http://www.prosdent.org/article/PIIS0022391310600248/abstract?rss=yes Statement of problem: Obstructive sleep apnea (OSA) is a life-threatening condition that is diagnosed and evaluated primarily by polysomnography (PSG). The procedure is time consuming, expensive, and inconvenient for the patient, and may not be universally available. Purpose: The purpose of this pilot study was to evaluate posttreatment results on lateral cephalograms in patients with OSA. Material and methods: Lateral cephalograms of 16 patients diagnosed with OSA were made at the beginning of treatment and 4-6 weeks following treatment. Treatment modalities used in the study were the mandibular advancement device (MAD) and continuous positive airway pressure (CPAP) therapy (n=8). Pharyngeal dimensions, soft palate area and angle, and hyoid bone position were recorded for the comparisons. The data were analyzed using Student's t test for the parametric analysis (α=.05). Results: A significant increase in the pharyngeal area (P<.001), a significant decrease in the soft palate area (P<.001), and vertical changes in the hyoid position were observed, with no significant change in the anteroposterior position of the hyoid bone. Conclusions: Within the limitations of this pilot study, lateral cephalograms were shown to be useful in evaluating treatment efficacy in subjects with OSA. (J Prosthet Dent 2010;103:170-177) A pilot study to evaluate posttreatment cephalometric changes in subjects with OSADeeksha Arya, Arvind Tripathi, Saumyendra Vikram Singh, Suryakant Tripathi, Amit Nagar, Anupam Mishra10.1016/S0022-3913(10)60024-8Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8170177http://www.prosdent.org/article/PIIS002239131060025X/abstract?rss=yesLee CK, Karl M, Kelly JR. Dent Mater 2009;25:1419-25. Epub 2009 Jul 30.Evaluation of test protocol variables for dental implant fatigue research10.1016/S0022-3913(10)60025-XJournal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8177177http://www.prosdent.org/article/PIIS0022391310600261/abstract?rss=yes Statement of problem: While 2 to 4 implants are preferred to retain and stabilize an implant overdenture, some reports suggest a single implant is adequate to retain an overdenture. Denture fracture is one of the common complications with overdentures; however, there is no information on the incidence of fractures when dentures are retained by 1 implant. Purpose: The purpose of this study was to compare the fracture incidence of mandibular overdentures retained by 1 and 2 implants. Material and methods: The records of 85 subjects enrolled in the Vancouver Implant Prosthesis (VIP) clinical trial between 2003 and 2008 and followed up for at least 17 months were reviewed retrospectively. From the clinical records, subjects who had experienced a fractured overdenture were identified. A fracture was considered as either a visible crack in the acrylic resin or complete separation of the denture parts. The same clinical records listed 3 denture fracture sites: over the implant, elsewhere, or unknown. A chi-square test was used to compare the incidence of fracture (α=.05). Kaplan-Meier and log rank tests were used to compare the survival rate of overdenture or “time to fracture” (α=.05). Results: Forty-two subjects received a single implant, and 43 received 2 implants. In total, there were 17 fractures recorded for 13 subjects. Nine single-implant subjects experienced 11 denture fractures, while 4 double-implant subjects experienced 6 fractures. There was no significant difference in the incidence of denture fractures in prostheses retained by 1 or 2 implants. When denture fractures did occur, they were found most frequently in areas adjacent to the implant(s). Conclusions: The incidence of denture base fractures was not significantly different between overdentures retained by 1 implant and those retained by 2 implants. When fractures did occur, they tended to be in areas adjacent to implants. Fracture incidence in mandibular overdentures retained by one or two implantsTomoya Gonda, Yoshinobu Maeda, Joanne N. Walton, Michael I. MacEntee10.1016/S0022-3913(10)60026-1Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8178181http://www.prosdent.org/article/PIIS0022391310600285/abstract?rss=yes Statement of problem: In rehabilitating edentulous patients, selecting appropriately sized teeth in the absence of preextraction records is problematic. Purpose: The purpose of this study was to investigate the relationships between some facial dimensions and widths of the maxillary anterior teeth to potentially provide a guide for tooth selection. Material and methods: Sixty full dentate Malaysian adults (18–36 years) representing 2 ethnic groups (Malay and Chinese), with well aligned maxillary anterior teeth and minimal attrition, participated in this study. Standardized digital images of the face, viewed frontally, were recorded. Using image analyzing software, the images were used to determine the interpupillary distance (IPD), inner canthal distance (ICD), and interalar width (IA). Widths of the 6 maxillary anterior teeth were measured directly from casts of the subjects using digital calipers. Regression analyses were conducted to measure the strength of the associations between the variables (α=.10). Results: The means (standard deviations) of IPD, IA, and ICD of the subjects were 62.28 (2.47), 39.36 (3.12), and 34.36 (2.15) mm, respectively. The mesiodistal diameters of the maxillary central incisors, lateral incisors, and canines were 8.54 (0.50), 7.09 (0.48), and 7.94 (0.40) mm, respectively. The width of the central incisors was highly correlated to the IPD (r=0.99), while the widths of the lateral incisors and canines were highly correlated to a combination of IPD and IA (r=0.99 and 0.94, respectively). Conclusions: Using regression methods, the widths of the anterior teeth within the population tested may be predicted by a combination of the facial dimensions studied. Regression methods to investigate the relationship between facial measurements and widths of the maxillary anterior teethZakiah Mohd Isa, Omar Farouq Tawfiq, Norliza Mohd Noor, Mohd Iqbal Shamsudheen, Omar Mohd Rijal10.1016/S0022-3913(10)60028-5Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8182188http://www.prosdent.org/article/PIIS0022391310600297/abstract?rss=yes This article describes a procedure in which polytetrafluoroethylene (PTFE) tape is used to seal the screw access channel to protect the screw head of the abutment and crown screw in implant-supported restorations. The material can be sterilized, is easy to manipulate, radiopaque, and less associated with malodor when retrieved. Malodor is primarily associated with the implant-abutment interface configuration and the suprastructure component design of a given implant system. This technique enables fast removal of the filling material in a single piece, preventing unpredictable and time-consuming manipulations when removal of the screw-retained crown or abutment is required. The use of polytetrafluoroethylene tape for the management of screw access channels in implant-supported prosthesesOsvaldo D. Moráguez, Urs C. Belser10.1016/S0022-3913(10)60029-7Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8189191http://www.prosdent.org/article/PIIS0022391310600303/abstract?rss=yesWalton TR. Int J Prosthodont 2009;22:260-267.Changes in the outcome of metal-ceramic tooth-supported single crowns and FDPs following the introduction of osseointegrated implant dentistry into a prosthodontic practice10.1016/S0022-3913(10)60030-3Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8191191http://www.prosdent.org/article/PIIS0022391310000338/abstract?rss=yesAll items for this section must be in the Editor's office 10 weeks before month of issue. News and Notes10.1016/S0022-3913(10)00033-8Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8192194http://www.prosdent.org/article/PIIS0022391310000211/abstract?rss=yesEditorial Board10.1016/S0022-3913(10)00021-1Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8FrontmatterA1A1http://www.prosdent.org/article/PIIS0022391310000296/abstract?rss=yesDisplay Ad10.1016/S0022-3913(10)00029-6Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8FrontmatterA2A2http://www.prosdent.org/article/PIIS0022391310000223/abstract?rss=yesSponsoring Organizations and Liaisons10.1016/S0022-3913(10)00022-3Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8FrontmatterA3A3http://www.prosdent.org/article/PIIS0022391310000302/abstract?rss=yesDisplay Ads10.1016/S0022-3913(10)00030-2Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8FrontmatterA4A5http://www.prosdent.org/article/PIIS002239131000020X/abstract?rss=yesTable of Contents10.1016/S0022-3913(10)00020-XJournal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8FrontmatterA6A7http://www.prosdent.org/article/PIIS0022391310000314/abstract?rss=yesDisplay Ads10.1016/S0022-3913(10)00031-4Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8FrontmatterA8A9http://www.prosdent.org/article/PIIS0022391310000235/abstract?rss=yesAuthors must adhere to the following guidelines, which are provided to ensure the expeditious processing of manuscripts. Failure to follow these guidelines may result in the rejection of manuscripts or delays in the review process and publication.Information for AuthorsCarol A. Lefebvre10.1016/S0022-3913(10)00023-5Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8FrontmatterA10A14http://www.prosdent.org/article/PIIS0022391310000247/abstract?rss=yesIf you have questions or comments regarding original articles and editorial management, please contact: Dr Carol A. Lefebvre, School of Dentistry, Medical College of Georgia, 1120 15th St, AD-2943, Augusta, GA 30912-1255; telephone (706) 721-4558; fax (706) 721-4571.Information for Readers10.1016/S0022-3913(10)00024-7Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8FrontmatterA15A16http://www.prosdent.org/article/PIIS0022391310000284/abstract?rss=yesThe Editorial Council welcomes Dr Stephen F. Rosenstiel as the new associate editor and Dr Radi Masri as the new assistant editor for The Journal of Prosthetic Dentistry. News from the Editorial Council: Editorial Council Appoints Associate and Assistant Editors10.1016/S0022-3913(10)00028-4Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8FrontmatterA17A17http://www.prosdent.org/article/PIIS0022391310000259/abstract?rss=yes The Editorial Council for The Journal of Prosthetic Dentistry announces the fourteenth annual Judson C. Hickey Scientific Writing Award. This award honors Dr Hickey's distinguished career as Editor of The Journal of Prosthetic Dentistry and his contributions to dental education, research, and administration.The Judson C. Hickey Scientific Writing Award10.1016/S0022-3913(10)00025-9Journal of Prosthetic Dentistry 103, 3 (2010)2010-03-01Journal of Prosthetic Dentistry2010-03-011033S0022-3913(10)X0003-8FrontmatterA18A18