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

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https://www.readbyqxmd.com/read/29785794/the-development-of-nonanatomic-denture-occlusion-part-iv
#1
Robert L Engelmeier
This fourth and final part of a four-part series concerned with the development of nonanatomic denture occlusion follows nonanatomic tooth design from the time of Victor Sears' first nonanatomic tooth patent through the end of the 20th century. Part IV concentrates on nonanatomic teeth developed during the last five decades of the 20th century. Many of the designs featured in this series exhibited genius, while others are pure nonsense. Sears claimed that a new nonanatomic tooth design appeared every 9 months on average during the first 30 years of nonanatomic tooth production...
May 21, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29756670/the-influence-of-post-system-design-and-material-on-the-biomechanical-behavior-of-teeth-with-little-remaining-coronal-structure
#2
Cristiano Lazzari Pinto, Claudia Lopes Brilhante Bhering, Gabriel Rodrigues de Oliveira, Angélica Maroli, Vagner Flávio Reginato, Ricardo Armini Caldas, Atais Bacchi
PURPOSE: To evaluate the influence of different post systems on the biomechanical behavior of teeth with a severe loss of remaining coronal structure. MATERIALS AND METHODS: Fifty standardized bovine teeth (n = 10 per group) were restored with: cast post-and-core (CPC), prefabricated metallic post (PFM), parallel glass-fiber post (P-FP), conical glass-fiber post (C-FP), or composite core (no post, CC). The survival rate during thermomechanical challenging (TC), the fracture strength (FS), and failure patterns (FP) were evaluated...
May 14, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29741238/effect-of-surface-modification-on-in-depth-transformations-and-flexural-strength-of-zirconia-ceramics
#3
Kan Wongkamhaeng, Deborah V Dawson, Julie A Holloway, Isabelle Denry
PURPOSE: Chairside surface adjustments of zirconia dental restorations enhance the toughening stress-induced tetragonal-to-monoclinic phase transformation and domain reorientation by ferro-elastic domain switching (FDS), but also trigger subsurface damage, which could compromise long-term clinical performance. The purpose of this study was to assess the depth of phase transformation, associated FDS, and flexural strength of dental zirconia (BruxZir HT 2.0), after chairside surface treatments...
May 9, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29741216/the-development-of-nonanatomic-denture-occlusion-part-ii
#4
Robert L Engelmeier
This second part of a four-part series concerned with the development of nonanatomic denture occlusion follows nonanatomic tooth design from the time of Victor Sears' first nonanatomic tooth patent through the mid-1930s. Many of the designs featured in this series exhibit genius, while others are pure nonsense. Sears claimed that a new nonanatomic tooth design appeared every 9 months on average during the first 30 years of nonanatomic tooth production. Many current nonanatomic tooth patents are further refinements of those earlier designs...
May 9, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29717518/evaluation-of-the-accuracy-of-conventional-and-digital-impression-techniques-for-implant-restorations
#5
Renata Vasconcellos Moura, Alberto Noriyuki Kojima, Cintia Helena Coury Saraceni, Lucas Bassolli, Ivan Balducci, Mutlu Özcan, Alfredo Mikail Melo Mesquita
PURPOSE: The increased use of CAD systems can generate doubt about the accuracy of digital impressions for angulated implants. The aim of this study was to evaluate the accuracy of different impression techniques, two conventional and one digital, for implants with and without angulation. MATERIALS AND METHODS: We used a polyurethane cast that simulates the human maxilla according to ASTM F1839, and 6 tapered implants were installed with external hexagonal connections to simulate tooth positions 17, 15, 12, 23, 25, and 27...
May 1, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29682833/fracture-resistance-of-pressed-and-milled-lithium-disilicate-anterior-complete-coverage-restorations-following-endodontic-access-preparation
#6
Petrina Gerogianni, Wen Lien, Despoina Bompolaki, Ronald Verrett, Stephan Haney, Patrick Mattie, Russell Johnson
PURPOSE: This in vitro study evaluated the fracture resistance and clinical prognosis of anterior lithium disilicate crowns (e.max Press and e.max CAD), following endodontic access and repair. The research design simulates intraoral loading conditions to produce clinically applicable results. MATERIALS AND METHODS: Monolithic anterior crowns, based on #8 anatomy, were fabricated from e.max Press ingots and e.max CAD blocks and adhesively bonded on identical dies milled out of a dentin analog material (NEMA G10)...
April 22, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29682823/additive-manufacturing-technologies-used-for-processing-polymers-current-status-and-potential-application-in-prosthetic-dentistry
#7
REVIEW
Marta Revilla-León, Mutlu Özcan
There are 7 categories of additive manufacturing (AM) technologies, and a wide variety of materials can be used to build a CAD 3D object. The present article reviews the main AM processes for polymers for dental applications: stereolithography (SLA), digital light processing (DLP), material jetting (MJ), and material extrusion (ME). The manufacturing process, accuracy, and precision of these methods will be reviewed, as well as their prosthodontic applications.
April 22, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29679427/a-randomized-clinical-trial-of-oral-health-related-quality-of-life-peri-implant-and-kinesiograph-parameters-in-wearers-of-one-or-two-implant-mandibular-overdentures
#8
Vivian Barnabé Policastro, André Gustavo Paleari, Andressa Rosa Perin Leite, Danny Omar Mendoza-Marin, Ana Flávia Balestrero Cassiano, Luciana Machion Shaddox, Marco Antonio Compagnoni, Ana Carolina Pero
PURPOSE: The present randomized clinical trial compared the oral health-related quality of life (OHRQoL), peri-implant parameters, mandible movements, and maxillary complete denture movement during chewing between wearers of single- (1-IOD) and wearers of two-implant overdentures (2-IODs) for a period of 12 months. MATERIALS AND METHODS: Twenty-one complete denture wearers were randomly allocated into two parallel groups: 1-IOD (n = 11) or 2-IODs (n = 10). The validated Brazilian version of the OHIP-EDENT was used to evaluate the OHRQoL...
April 20, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29679423/marginal-adaptation-of-cad-cam-all-ceramic-crowns-made-by-different-impression-methods-a-literature-review
#9
REVIEW
Yeganeh Memari, Maryam Mohajerfar, Anahid Armin, Fatemeh Kamalian, Vida Rezayani, Elaheh Beyabanaki
All-ceramic crowns for teeth are widely used for restoring teeth. Stone casts have been made from conventional impression methods; however, newer techniques have made this process easier and faster for both the patient and the practitioner. Laboratory CAD/CAM technology mainly involves scanning the die stone, while other systems permit impression or intraoral scanning; however, one major concern remaining is the marginal fit of the restorations made using different methods for recording the prepared teeth. This study aims to review studies evaluating the marginal fit of all-ceramic crowns manufactured by CAD/CAM systems using different extra- and intra-oral scanners compared to conventional impressions...
April 20, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29665177/prosthodontic-complications-of-metal-ceramic-and-all-ceramic-complete-arch-fixed-implant-prostheses-with-minimum-5-years-mean-follow-up-period-a-systematic-review-and-meta-analysis
#10
REVIEW
Chi Kin Kenneth Wong, Unnati Narvekar, Haralampos Petridis
PURPOSE: The purpose of this systematic review and meta-analysis was to review and analyze the prosthodontic complications, survival, and success of metal-ceramic (MC) and all-ceramic (AC) complete-arch fixed implant dental prostheses (CFIDPs) with a minimum mean follow-up period of 5 years. METHODS: A structured literature search was conducted using 3 electronic databases (MEDLINE, the Cochrane Library, Web of Science) for clinical studies reporting on prosthodontic complications of metal-ceramic and/or all-ceramic CFIDPs published between 2000 and 2016...
April 17, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29664193/a-validation-study-of-the-impression-replica-technique
#11
Sofia Segerström, Johanna Wiking-Lima de Faria, Michael Braian, Arman Ameri, Camilla Ahlgren
PURPOSE: To validate the well-known and often-used impression replica technique for measuring fit between a preparation and a crown in vitro. MATERIALS AND METHODS: The validation consisted of three steps. First, a measuring instrument was validated to elucidate its accuracy. Second, a specimen consisting of male and female counterparts was created and validated by the measuring instrument. Calculations were made for the exact values of three gaps between the male and female...
April 17, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29654646/an-in-vitro-evaluation-of-the-effect-of-various-adhesives-and-surface-treatments-on-bond-strength-of-resin-cement-to-polyetheretherketone
#12
Ipek Caglar, Sabit Melih Ates, Zeynep Yesil Duymus
PURPOSE: To investigate the effect of various surface pretreatments and adhesive systems on bond strength of resin cement to polyetheretherketone (PEEK). MATERIALS AND METHODS: 360 PEEK specimens were divided into 4 groups to receive the following pretreatments (n = 90): no pretreatment, sandblasting, silica coating and Er:YAG laser. Surface roughness (SR) and scanning electron microscopy (SEM) evaluations were conducted after mechanical pretreatments for topographical surface evaluations...
April 14, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29578300/coronal-microleakage-of-teeth-restored-with-cast-posts-and-cores-cemented-with-four-different-luting-agents-after-thermocycling
#13
Maryam Mohajerfar, Kaveh Nadizadeh, Tabasom Hooshmand, Elaheh Beyabanaki, Hamid Neshandar Asli, Siamak Sabour
PURPOSE: The apical seal provided by a root canal filling may be breached via coronal leakage. This study aimed to compare the teeth restored with custom-made cast metal posts and cores cemented with different luting agents in terms of coronal microleakage after thermocycling. MATERIALS AND METHODS: This in vitro study was conducted on 32 extracted single-canal teeth. Root canals were prepared by step-back technique and filled with gutta percha and sealer. The coronal 7 mm of gutta percha was removed, and post space was prepared using peeso reamers #2 and #3 consecutively...
March 26, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29578264/influence-of-different-implant-geometry-in-clinical-longevity-and-maintenance-of-marginal-bone-a-systematic-review
#14
REVIEW
Sabrina Telles Lovatto, Rafaela Bassani, Rafael Sarkis-Onofre, Mateus Bertolini Fernandes Dos Santos
PURPOSE: To assess, through a systematic review, the influence of different implant geometries on clinical longevity and maintenance of marginal bone tissue. METHODS: An electronic search was conducted in MEDLINE, Scopus, and Web of Science databases, limited to studies written in English from 1996 to 2017 using specific search strategies. Only randomized controlled trials (RCTs) that compared dental implants and their geometries were included. Two reviewers independently selected studies, extracted data, and assessed the risk of bias of included studies...
March 26, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29573505/effect-of-alkaline-peroxides-on-the-surface-of-cobalt-chrome-alloy-an-in-vitro-study
#15
Glenda Lara Lopes Vasconcelos, Patricia Almeida Curylofo, Priscilla Neves Raile, Ana Paula Macedo, Helena Freitas Oliveira Paranhos, Valeria Oliveira Pagnano
PURPOSE: Removable denture hygiene care is very important for the longevity of the rehabilitation treatment; however, it is necessary to analyze the effects that denture cleansers can cause on the surfaces of prostheses. Thus, this study evaluated the effect of alkaline peroxide-effervescent tablets on the surface of cobalt-chromium alloys (Co-Cr) used in removable partial dentures. MATERIALS AND METHODS: Circular metallic specimens (12 × 3 mm) were fabricated and were immersed (n = 16) in: control, Polident 3 Minute (P3M), Steradent (S), Efferdent (E), Polident for Partials (PFP), and Corega Tabs (CT)...
March 24, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29573048/rehabilitation-of-edentulism-and-mortality-a-systematic-review
#16
REVIEW
Avni Gupta, David A Felton, Torsten Jemt, Sreenivas Koka
PURPOSE: It has been shown that tooth loss is associated with an increased risk of early mortality, and that prosthetic rehabilitation of edentulism improves quality of life and reduces morbidity. This review examines association between prosthetic rehabilitation of the edentulous state with a complete denture and mortality. METHODS: A systematic search using combinations of related keywords for "complete denture" and "mortality" was performed on PubMed, Web of Science, and Google Scholar...
March 23, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29533499/fracture-resistance-of-cad-cam-fabricated-lithium-disilicate-mod-inlays-and-onlays-with-various-cavity-preparation-designs
#17
Hyung-In Yoon, Paul J Sohn, Sharon Jin, Hawazin Elani, Sang J Lee
PURPOSE: To examine the fracture resistance of premolars restored with CAD/CAM lithium disilicate mesio-occlusal-distal (MOD) inlays and onlays of different cavity designs. MATERIALS AND METHODS: Two widths of occlusal isthmus (75%, 100% of intercuspal distance) and three designs of cuspal coverage (none, palatal, complete) were used for the preparation of MOD inlays and onlays in the extracted maxillary premolars. Sixty lithium disilicate restorations were milled and bonded into the cavities...
March 13, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29533497/spectrophotometric-evaluation-of-anterior-maxillary-tooth-color-distribution-according-to-age-and-gender
#18
Tahir Karaman, Eyyup Altintas, Bekir Eser, Tuba Talo Yildirim, Faruk Oztekin, Alihan Bozoglan
PURPOSE: To determine the effects of age and gender on the color distribution of the right maxillary central, lateral incisors, and canine teeth. MATERIALS AND METHODS: The tooth color was measured using the VITA Easyshade V spectrophotometer with a total of 202 volunteers (89 men, 113 women). The age distribution in this study was between 15 and 70 years old (average: 31). A grey background color was used to prevent background reflection while performing the color measurements...
March 13, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29533495/dental-shade-matching-and-value-discernment-abilities-of-first-year-dental-students
#19
Terence A Imbery, Dan Tran, Mary A Baechle, Jennifer L Hankle, Charles Janus
PURPOSE: To determine if Farnsworth-Munsell 100 Hue Test, Perceptual Ability Test, gender, age, ethnicity, and time predict dental shade matching and value discernment in first-year dental students. MATERIALS AND METHODS: Farnsworth-Munsell 100 Hue Test was administered to 95 first-year-dental students beneath a Judge II booth (color temperature of 6500°K, and color rendering index of 90). Students also arranged 16 masked shade tabs from a Vita Classic shade guide by value (lightest to darkest) and matched together 16 pairs of masked shade tabs from two Vita Classic shade guides...
March 13, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29533493/multidisciplinary-approach-for-full-mouth-rehabilitation-of-an-adult-patient-with-collapsed-occlusal-plane-and-several-missing-teeth-a-clinical-report
#20
Jieun Cheong, Yu-Sun Hwang, Bock-Yung Jung
In the full-mouth rehabilitation of a patient with severely collapsed occlusion, a multidisciplinary approach including prosthodontics, orthodontics, endodontics, and surgery could provide better esthetic and functional results. Orthodontic treatment aiming for stable occlusion that meets the standard requirement of functional occlusion, enables the maintenance of occlusal function, and guarantees long-term stability on the basis of periodontal health was attempted. The essential element of this protocol is careful treatment planning based on the optimal sequence pursuing functional occlusion...
March 13, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
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