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Journal of Prosthodontics: Official Journal of the American College of Prosthodontists

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https://www.readbyqxmd.com/read/30191668/a-comparative-evaluation-of-stress-distribution-with-two-attachment-systems-of-varying-heights-in-a-mandibular-implant-supported-overdenture-a-three-dimensional-finite-element-analysis
#1
Nikita Khurana, Shobha Rodrigues, Satish Shenoy, Sharon Saldanha, Umesh Pai, Thilak Shetty, Srikant N, M Mahesh, Puneet Hegde
PURPOSE: To analyze and compare the stress distribution in an implant-retained overdenture complex using ball and Locator attachments of three heights by means of a 3D finite element analysis (FEA). MATERIALS AND METHODS: Six finite element models comprising an edentulous mandible with two interforaminal bone-level implants and ball attachments of heights 1 mm (A1), 3 mm (A3), and 5 mm (A5), and Locator attachments of heights 1 mm (B1), 3 mm (B3), and 5 mm (B5), were designed using ANSYS Workbench Software...
September 6, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30178903/insertion-torque-of-variable-thread-tapered-implants-in-the-posterior-maxilla-a-clinical-study
#2
Habib L Abi-Aad, Fadi I Daher, Nadim Z Baba, Giampiero Cordioli, Zeina A K Majzoub
PURPOSE: Primary stability is a key factor for successful implant osseointegration, especially in poor bone quality and early/immediate loading. In the immediate loading protocol, insertion torque values (ITVs) have been suggested to be the most valid prognostic factor for osseointegration of maxillary implants. The objectives of this study were to: (1) evaluate ITVs achieved by a variable-thread tapered implant in the posterior maxilla; and (2) assess the impact of bone quality, implant dimensions, bicortical anchorage, and implant location on ITVs...
September 4, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30178899/flexural-and-surface-properties-of-pmma-denture-base-material-modified-with-thymoquinone-as-an-antifungal-agent
#3
Mohammed M Gad, Ahmad M Al-Thobity, Shaimaa M Fouda, Ritva Näpänkangas, Aune Raustia
PURPOSE: To evaluate the effect of addition of different concentrations of thymoquinone (TQ) on the flexural strength, elastic modulus, surface roughness, and hardness of PMMA denture base material. MATERIALS AND METHODS: A total of 160 rectangular specimens were prepared from heat-polymerized acrylic resin, with dimensions of 65 × 10 × 2.5 mm3 for flexural strength testing and 10 × 20 × 3 mm3 for surface property testing. The specimens were divided into eight groups of 20 specimens: one control group without addition of TQ and seven test groups prepared by adding TQ to acrylic powder in concentrations of 0...
September 4, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30168651/short-vs-standard-laser-microgrooved-implants-supporting-single-and-splinted-crowns-a-prospective-study-with-3-years-follow-up
#4
Renzo Guarnieri, Dario Di Nardo, Gianfranco Gaimari, Gabriele Miccoli, Luca Testarelli
PURPOSE: The aim of this study was to compare survival rates, marginal bone loss (MBL), and peri-implant soft tissue parameters between short and standard laser-microgrooved implants supporting single or splinted crowns 3 years after loading. MATERIALS AND METHODS: 30 subjects received 1 short (≤7 mm ) and 1 standard length (≥9 mm ) laser-microgrooved implant in adjacent sites of the premolar and molar regions of the mandible or maxilla. Peri-implant soft tissue parameters and intraoral radiographs were recorded at the delivery of definitive crowns (baseline) and 3 years later...
August 31, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30121945/microstructural-and-mechanical-characterization-of-cad-cam-materials-for-monolithic-dental-restorations
#5
Arthur Furtado de Mendonca, Mahdi Shahmoradi, Cresus Vinicius Depes de Gouvêa, Grace M De Souza, Ayman Ellakwa
PURPOSE: To determine and compare the microstructure, flexural strength, flexural modulus, fracture strength, and microhardness of four types of computer-aided design/computer-aided manufacturing (CAD/CAM) materials for monolithic dental restorations. MATERIALS AND METHODS: A lithium disilicate (LD; IPS e.max CAD), a zirconia-reinforced lithium silicate (ZLS; VITA Suprinity), a hybrid high-performance polymer (HPP) composite resin (GC Cerasmart), and a hybrid polymer-infiltrated ceramic network (PICN) material (VITA Enamic) were used to manufacture monolithic ceramic posterior crowns (n = 10) that were adhesively cemented on resin-based composite dies and loaded until fracture...
August 18, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30117222/subcrestal-implant-placement-and-recontouring-soft-tissue-using-the-erbium-yag-laser-to-manage-restorative-space-in-implant-overdentures
#6
Joseph Massad, Russell Wicks, Swati Ahuja, David R Cagna
Subcrestal implant placement helps gain vertical restorative space at the location of the implants; however, this leads to the development of a tall mucosal cuff, necessitating the use of tall abutments. This article describes the technique of gaining restorative space by decreasing the height of the mucosal cuff with an Erbium YAG laser.
August 16, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30091168/comparison-of-the-fit-of-lithium-disilicate-crowns-made-from-conventional-digital-or-conventional-digital-techniques
#7
Khaled Q Al Hamad, Bashar A Al Rashdan, Wael M Al Omari, Nadim Z Baba
PURPOSE: To evaluate the fit of single crowns fabricated using conventional, digital, or cast digitization methods. MATERIALS AND METHODS: One subject with a peg-shaped maxillary lateral incisor was selected in this study. Tooth preparation for an all-ceramic crown was performed and 10 conventional poly(vinyl siloxane) impressions, and 10 digital impressions using an intraoral scanner were made. Each working cast was scanned using a laboratory scanner and an intraoral scanner...
August 8, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30044033/premaxilla-stress-distribution-and-bone-resorption-induced-by-implant-overdenture-and-conventional-denture
#8
Mohamed Samih Alsrouji, Rohana Ahmad, Noor Hayati Abdul Razak, Solehuddin Shuib, Wahyu Kuntjoro, Nadim Z Baba
PURPOSE: To relate the principal stress, strain, and total deformation in the premaxilla region beneath a complete denture to the pattern of premaxilla bone resorption when opposed by a conventional complete denture (CD) or by a two-implant-retained overdenture (IOD) using finite element analysis (FEA). MATERIALS AND METHODS: Three-dimensional solid models of the maxilla, mucosa, and denture of a selected edentulous patient were created using Mimics and CATIA software...
July 25, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30043482/effect-of-aging-and-weathering-on-the-physical-properties-of-maxillofacial-silicone-elastomers-a-systematic-review-and-meta-analysis
#9
REVIEW
Ahmed Mushfiqur Rahman, Nafij Bin Jamayet, Md Minhaz Ul Islam Nizami, Yanti Johari, Adam Husein, Mohammad Khursheed Alam
PURPOSE: This systematic review aims to identify and interpret results of studies that evaluated the changes in the physical properties of maxillofacial prosthetic materials (1) without aging, (2) after natural or artificial accelerated aging, and (3) after outdoor weathering. METHODS: Relevant articles written in English only, before January 15, 2017, were identified using an electronic search in the PubMed, Scopus, and Google Scholar databases. Furthermore, a manual search of the related major journals was also conducted to identify more pertinent articles...
July 25, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30039899/managing-gag-reflex-during-removable-partial-denture-treatment-a-review-and-a-clinical-report
#10
Spyridon Stefos, Panagiotis Zoidis, Arthur Nimmo
A gag reflex is a common occurrence during dental procedures. A hypersensitive gag reflex is less frequently encountered and may prevent the dental provider from successfully completing critical clinical stages, resulting in poor treatment outcomes. Once patients suffer an unpleasant gag reflex experience in a dental office, they may become phobic, delaying or postponing their dental treatment. The purpose of this article is to review available treatment options and present a report of a partially edentulous patient with an exaggerated gag reflex, focusing on clinical management using a simple yet effective table salt technique and proper prosthesis design...
July 24, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30039898/does-the-translucency-of-novel-monolithic-cad-cam-materials-affect-resin-cement-polymerization-with-different-curing-modes
#11
Yagmur Ozer Caprak, Pinar Turkoglu, Gokhan Akgungor
PURPOSE: The translucency of CAD/CAM blocks influences the polymerization efficiency of resin cement used underneath. The aim of this study is to evaluate the influence of the translucency parameters (TPs) of current monolithic CAD/CAM blocks on the microhardness of light-cured or dual-cured resin cement. MATERIALS AND METHODS: 100 specimens were prepared from five types of CAD/CAM blocks (Mark II, Suprinity, Enamic, e.max, Ultimate), and their TP values were measured by spectrophotometry; 100 resin cement specimens (Duolink) were cured underneath five ceramic specimen groups by indirect LED light for 40 seconds with dual-cure (with catalyst) and light-cure (without catalyst) polymerization modes...
July 24, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30039897/a-randomized-clinical-trial-comparing-zirconia-and-metal-ceramic-three-unit-posterior-fixed-partial-dentures-a-5-year-follow-up
#12
Maria J Suarez, Cristina Perez, Jesus Pelaez, Carlos Lopez-Suarez, Esther Gonzalo
PURPOSE: To compare the survival, success rates, and biological/technical complications of posterior metal-ceramic (MC) and zirconia fixed partial dentures (FPDs). MATERIALS AND METHODS: A total of 40 patients requiring 40 posterior FPDs were randomly assigned to receive 20 zirconia and 20 MC restorations. The restorations were examined 1 week (baseline) and 1, 3, and 5 years after the end of treatment. Technical and biological outcomes were compared. Data were statistically analyzed using the Wilcoxon signed-rank and Mann-Whitney U tests...
July 24, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30039888/bond-strength-of-resilient-lining-materials-to-denture-base-resin-a-systematic-review-and-meta-analysis
#13
Hatice Özdemir, Alper Özdoğan
PURPOSE: Bond strength of resilient lining materials with denture base materials is continuously under development. The purpose of this systematic review is to perform a meta-analysis to find out which form of resilient lining bonds better to the denture base, what surface treatments have the highest efficacy to increase the bonding, and what is the most commonly preferred test method to measure bond strength. MATERIALS AND METHODS: Based on a search of PubMed, EMBASE, and Google Scholar, 57 articles were included in this study...
July 24, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30028063/effect-of-resin-cement-brand-on-the-color-of-zirconia-based-restorations
#14
Farhad Tabatabaian, Delaram Bakhshaei, Mahshid Namdari
PURPOSE: The purpose of this in vitro study was to evaluate the effect of resin cement brand on the color of zirconia-based restorations. MATERIALS AND METHODS: Ninety A2 shade veneered zirconia disc specimens (0.5 mm zirconia thickness, 1 mm veneer thickness, 10 mm diameter) and 90 A3.5 shade composite resin background specimens (10 mm height, 10 mm diameter) with a superficial cement space (0.1 mm depth, 8 mm diameter) were fabricated. The zirconia specimens were cemented to the background specimens using universal resin cements: RelyX Unicem 2 (RU), PANAVIA SA Cement Plus (PS), and NX3 Nexus (NN)...
July 20, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30028062/suitability-of-a-mobile-phone-colorimeter-application-for-use-as-an-objective-aid-when-matching-skin-color-during-the-fabrication-of-a-maxillofacial-prosthesis
#15
Daniel C Mulcare, Trevor J Coward
PURPOSE: Color matching a facial prosthesis to human skin is very challenging. Colorimeters aid this process by adding objectivity to what is an otherwise subjective procedure. Mobile phone colorimeter applications offer a less expensive and widely available alternative to dedicated colorimeter devices for color measurement. There is a lack of evidence in the literature regarding the suitability of mobile phone colorimeter applications for the development of silicone shades for facial prosthetics...
July 20, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30028061/the-influence-of-age-gender-mandibular-bone-height-previous-experience-with-prostheses-and-fabrication-methods-on-masticatory-performance-of-complete-denture-wearers
#16
Carla Pinto Alves, Maira Foresti Vieira Munhoz, Gabriela Mayara Oliveira Nascimento, Giovanni Antônio Nícoli, André Gustavo Paleari, Germana de Villa Camargos
PURPOSE: To evaluate the influence of age, gender, mandibular bone height, previous experience with prostheses, and methods for denture fabrication on masticatory performance of complete denture (CD) wearers. MATERIALS AND METHODS: For this study, 29 individuals treated with CDs fabricated by simplified or conventional methods had their masticatory performance assessed 4 weeks after the prostheses' adjustment and control, using the sieve method and almonds as a natural food test...
July 20, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30028055/implant-placement-under-existing-removable-dental-prostheses-and-the-effect-on-follow-up-and-prosthetic-maintenance
#17
Juliana Marotti, Bodo Gatzweiler, Mona Wolfart, Martin Sasse, Matthias Kern, Stefan Wolfart
PURPOSE: The aim of this prospective clinical study was to compare the maintenance interventions required for solely implant-retained overdentures (I-OD) with that of overdentures retained by a combination of telescopic crowns and implants (T/I-OD). MATERIALS AND METHODS: The participants in this study were 22 patients who initially presented either with a removable complete denture (n = 11) or with an overdenture retained by 1 to 2 telescopic crowns on natural teeth (n = 11)...
July 20, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30028052/effect-of-aging-time-and-thickness-on-low-temperature-degradation-of-dental-zirconia
#18
Yongxiang Zhuang, Ziyuan Zhu, Ting Jiao, Jian Sun
PURPOSE: To evaluate the influence of specimen thickness and low-temperature degradation (LTD) on yttrium-stabilized tetragonal zirconia polycrystals (Y-TZP). MATERIALS AND METHODS: Thin discs of Y-TZP from four manufacturers were sintered according to each manufacturer's recommendations, cut into 23 mm (length) × 4 mm (width) × 0.8 mm/1.5 mm (thickness) specimens, artificially aged under standard autoclave sterilization conditions (34°C at 0.2 MPa for 10 and 20 hours), and finally ground and polished...
July 20, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/30028051/the-impact-of-nicotine-and-cigarette-smoke-condensate-on-metabolic-activity-and-biofilm-formation-of-candida-albicans-on-acrylic-denture-material
#19
Yasmin Mohammed Alzayer, Grace F Gomez, George J Eckert, John A Levon, Richard L Gregory
PURPOSE: Smokers have increased denture stomatitis caused primarily by Candida albicans. The primary aim of this study was to demonstrate the impact of a wide range of nicotine and cigarette smoke condensate (CSC) concentrations on biofilm formation and metabolic activity of C. albicans on acrylic denture material. MATERIALS AND METHODS: C. albicans (ATCC strain 10231) was used. Standardized denture acrylic (PMMA) specimens (total of 135 specimens) were incubated with C...
July 20, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29999570/effect-of-aging-on-stained-monolithic-resin-ceramic-cad-cam-materials-quantitative-and-qualitative-analysis-of-surface-roughness
#20
Sven Mühlemann, Joëlle M Bernini, Beatrice Sener, Christoph Hf Hämmerle, Mutlu Özcan
PURPOSE: The aim of this in vitro study was to measure the effect of staining and artificial aging on the surface roughness of commercially available resin-ceramic computer-aided design and computer-aided manufacturing (CAD/CAM) materials both quantitatively and qualitatively and to compare it to feldspathic material. MATERIALS AND METHODS: Test specimens (n = 15 per material) were prepared of CAD/CAM ingots from a resin nanoceramic (Lava Ultimate, LVU), a polymer-infiltrated ceramic (Vita Enamic, ENA), and a resin nanoceramic (Cerasmart, CER)...
July 12, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
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