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

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https://read.qxmd.com/read/30997930/management-of-biotechnical-complications-associated-with-a-full-arch-implant-restoration-using-digital-and-conventional-workflows-a-clinical-report
#1
Niranjan Joshi, Jack Piermatti, Max Nahon, Thomas Balshi
Full-arch implant-supported restorations using a metal-acrylic resin design have had a high success rate but are also associated with frequent technical complications including framework misfit due to casting errors, debonding of denture teeth, and fracture of the acrylic from the metal framework. This clinical report describes a case of maxillary and mandibular full-arch implant-supported rehabilitation associated with technical and biological complications and use of digital technology for fabricating monolithic restorations...
April 18, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30994948/factors-that-influence-direction-deviation-in-freehand-implant-placement
#2
Tianhong Tang, Zhuoli Huang, Luman Liao, Xiaoyu Gu, Jiazheng Zhang, Xiuyin Zhang
PURPOSE: This retrospective study investigates the accuracy of freehand implant placement and whether the factors of presence of an adjacent tooth, implant quadrant, number of missing teeth, and location of the implant site influence direction and angulation deviations. MATERIALS AND METHODS: According to specific inclusion and exclusion criteria, a total of 112 implants from 75 partially edentulous patients were recruited for this retrospective study. The implants were inserted using a freehand approach by one experienced clinician (right-handed)...
April 17, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30945384/prosthetic-rehabilitation-of-an-edentulous-patient-with-microstomia-using-both-digital-and-conventional-techniques-a-clinical-report
#3
Sina Saygılı, Onur Geckili, Tonguc Sulun
This clinical report describes prosthetic rehabilitation applied to an edentulous patient with microstomia. Intraoral scanning was used for preliminary impressions, edentulous models were printed using a 3D printer, custom 2-piece impression trays for definitive impressions were made, and a 2-piece collapsible maxillary and a conventional mandibular denture were fabricated. Intraoral scanning is a useful alternative to conventional impression techniques and can be used safely in patients with microstomia for preliminary impressions...
April 3, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30942537/custom-nasal-septum-prosthesis-fabricated-from-a-3d-printed-working-model-a-clinical-report
#4
Tanya Somohano Marquez
This clinical report describes the treatment of a 47-year-old female patient with a nasal septum perforation. The treatment used a 2-piece magnetic custom prosthesis fabricated from a 3D-printed model. By using an existing medical CT scan to generate the printed working model, the number of clinical appointments was reduced. The workflow expanded the purpose of the radiologic images from simply diagnostic to include the prosthetic aspect of treatment. This article is protected by copyright. All rights reserved...
April 3, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30933395/polishing-methods-influence-on-color-stability-and-roughness-of-2-provisional-prosthodontic-materials
#5
Irenaldo André Soares, Priscilla Kelly Batista da Silva Leite, Ohana Rodrigues Farias, George Azevedo Lemos, André Ulisses Dantas Batista, Robinsom Viegas Montenegro
PURPOSE: To evaluate the roughness and color change of a conventional acrylic resin and a bis-acryl resin, submitted to different types of polishing and exposed to a staining solution. MATERIALS AND METHODS: One hundred specimens were manufactured from an autopolymerizing conventional acrylic resin (Duralay, shade 66) (n = 50) and a bis-acryl resin (Protemp 4, shade A3) (n = 50) according to the manufacturers' instructions. Specimens were subdivided into 10 groups (n = 10), according to the type of resin and polishing method, including no-polishing (control groups for acrylic resin [tungsten bur finishing] and bis-acryl resin [cotton and alcohol]), Enhance System, Edenta kit, Labordental kit, and sandpaper...
April 1, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30932267/combining-conventional-impressions-and-intraoral-scans-a-technique-for-the-treatment-of-complete-denture-patients-with-flabby-tissue
#6
Seoung-Jin Hong, Hyeonjong Lee, Janghyun Paek, Ahran Pae, Hyeong-Seob Kim, Kung-Rock Kwon, Kwantae Noh
The conventional method for impressions of flabby tissue uses modified trays and highly flowable materials, but mucostatic impressions are difficult to achieve due to the viscous and the elastic natures of impression materials. In this report, a technique in which conventional impression and intraoral scanning for a fully edentulous patient with flabby tissue are combined. The definitive impression was obtained by applying appropriate pressure to each tissue area, and the denture can be maintained passively and stable at rest and during function...
April 1, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30924568/patient-specific-risk-based-prevention-maintenance-and-supportive-care-a-need-for-action-and-innovation-in-education
#7
Fatemeh S Afshari, Stephen D Campbell, Donald A Curtis, Lily T Garcia, Kent L Knoernschild, Judy Chia-Chun Yuan
PURPOSE:  To develop a competency-based curriculum framework for prevention, supportive care, and maintenance for use in educational and patient care programs and to seek consensus on an overarching competency statement that embraces these critical learning and patient care concepts. MATERIALS AND METHODS:   A preliminary survey of current preventive and maintenance practices in U.S. dental and prosthodontic programs was completed and summarized with quantitative analysis...
March 29, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30912204/effect-of-bonding-agent-on-metal-ceramic-bond-strength-between-co-cr-fabricated-with-selective-laser-melting-and-dental-feldspathic-porcelain
#8
Konstantinos Dimitriadis, Triantafillos Papadopoulos, Simeon Agathopoulos
PURPOSE: To investigate he effect of bonding agent on the bonding strength between Co-Cr dental alloy, prepared by selective laser melting (SLM), and feldspathic porcelain. MATERIALS AND METHODS: The experiments were conducted according to ISO 9693 and the conventional protocols for the production of metal-ceramic dental restorations. After Al2 O3 air-particle abrasion, metal-substrates of Co-Cr dental alloy specimens were bonded, using bonding agent (25 specimens), with dental porcelain positioned in layers (opaque, dentin, enamel)...
March 26, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30887663/digital-workflow-of-auricular-rehabilitation-a-technical-report-using-an-intraoral-scanner
#9
Ahmed M Ballo, Caroline T Nguyen, Vincent S K Lee
Prosthodontic rehabilitation of a congenital or acquired defect of the ear is considered a challenging and skill-dependent procedure. This technical report describes a novel approach for direct digital scanning of the unaffected contralateral ear using an intraoral scanner and external markers. The obtained digital data of the ear was exported, digitally mirrored, and successfully positioned to a virtual model of a human head with a missing ear. This technique demonstrates the potential application of CAD/CAM in the design and fabrication of an auricular prosthesis for patients with a unilateral ear defect...
March 18, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30875139/blood-flow-alterations-in-the-anterior-maxillary-mucosa-as-induced-by-implant-retained-overdenture
#10
Mohamed Samih Alsrouji, Rohana Ahmad, Norliza Ibrahim, Wahyu Kuntjoro, Fahad A Al-Harbi, Nadim Z Baba
PURPOSE: Blood flow disturbance from functional pressure may lead to ischemia and accumulation of metabolites leading to residual ridge resorption (RRR) underneath complete dentures. The purposes of this study were to determine the effect of mandibular complete denture (CD) and implant-retained overdenture (IRO) on blood flow disturbance in the opposing denture bearing-mucosa of maxillary CD and to compare the blood flow disturbance to RRR of the anterior maxilla. MATERIALS AND METHODS: The test group included 9 participants rehabilitated by maxillary CD opposing mandibular IRO, while the control group consisted of 4 participants with CDs...
March 15, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30844109/clinical-evidence-for-clinical-practice
#11
LETTER
Kent L Knoernschild, Stephen D Campbell
No abstract text is available yet for this article.
March 7, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30838728/enhancing-student-learning-of-removable-prosthodontics-using-the-latest-advancements-in-virtual-3d-modeling
#12
Ahmed Mahrous, Galen B Schneider
When educating dental students or prosthodontic residents, a picture can be worth a thousand words. If that is so, then what could enhanced 3D modeling be worth relative to enhancing student learning? The answer is undoubtedly more than what a picture can provide. That is why the use of 3D models has become increasingly common with respect to patient care. The 3D modeling allows the patient to visualize more clearly the proposed treatments and outcomes; however, while 3D modeling has started to make an appearance in dental education, many of the current 3D modeling techniques do not offer the flexibility needed for dental education and enhanced student learning...
March 5, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30830701/dental-implant-therapy-in-a-patient-with-acromegaly-a-clinical-report
#13
Florian R Kernen, Avinash S Bidra
Acromegaly is an adult endocrine disorder that results from excessive growth hormone after closure of the growth plates and is associated with significant morbidity and increased mortality. The orofacial features of patients with acromegaly are thick lips with a tendency towards mandibular overgrowth with prognathism, jaw thickening, maxillary widening, drifting of teeth, malocclusion, and increased gonial angle, all of which can challenge the prosthodontist in dental rehabilitation. Additionally, excessive secretion of growth hormone and insulin-like growth factors have been shown to increase bone turnover, which in turn leads to weakening of bone microarchitecture and high risk of fragility fractures...
March 4, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30829443/a-genetic-association-study-of-a-specific-gene-and-severe-form-of-resorption-in-the-edentulous-mandible-in-the-egyptian-population
#14
Samar M Emam, Asmaa K Amin, Noha M Issa, Mohamed S El-Attar
PURPOSE: To investigate for the first time in Egypt and the Middle East the relationship between a specific gene and the presence of severely resorbed edentulous mandibular ridges in a sample of the Egyptian population. MATERIALS AND METHODS: The study was conducted on 50 subjects divided into case and control groups according to the residual ridge height. Saliva was used as a convenient source of DNA in the dental clinic. A certain genetic variation (1772C>T) in an important gene related to bone healing (hypoxia-inducible factor-1 alpha [HIF1-α] gene) was selected...
March 4, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30806990/double-full-arch-fixed-implant-supported-prostheses-outcomes-and-complications-after-a-mean-follow-up-of-5-years
#15
Panos Papaspyridakos, Thaisa Barizan Bordin, Zuhair S Natto, Yong-Jeong Kim, Khaled El-Rafie, Alexandra Tsigarida, Konstantinos Chochlidakis, Hans-Peter Weber
PURPOSE: To retrospectively assess complications and clinical and radiographic outcomes of edentulous patients treated with double full-arch implant-supported fixed complete dental prostheses (IFCDPs) after a mean observation period of 5.1 years. MATERIALS AND METHODS: The single-visit clinical and radiographic examination included medical and dental history review and clinical assessment of biologic and technical complications encountered with all implants and IFCDPs...
February 22, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30793816/volume-assessment-of-the-effect-of-obturators-on-facial-form-following-surgery-for-head-and-neck-cancer-using-stereophotogrammetry
#16
Trevor J Coward, Robin Richards, Michael R Fenlon, Brendan J Scott
PURPOSE: To determine if stereophotogrammetry could be used to determine the effects of obturators on facial contour in relation to the measurement of facial volumes. MATERIALS AND METHODS: Stereophotogrammetry images were recorded from 20 subjects with and without their obturators in place. These were converted into a stereolithographic format and overlaid. Registrations were made using the tissues on the normal areas of the face. Difference images were created, enabling surface areas and volumes to be calculated...
February 22, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30793425/multidisciplinary-implant-rehabilitation-of-a-patient-with-cleidocranial-dysostosis-a-journey-from-age-13-to-21
#17
Alberto J Ambard, Stephen Clemens, Daniel S Phillips
This clinical report describes the multidisciplinary oral rehabilitation of a teenage female patient with cleidocranial dysostosis, whose treatment was started in her teenage years. The unique challenges of delayed intervention are described in this report, highlighting the surgical, orthodontic, and prosthodontic care the patient received from age 13 to 21. Maintaining as many natural teeth as possible, orthodontically erupting impacted teeth using a mandibular provisional fixed implant prosthesis as anchor, crowning several natural teeth, and rehabilitating edentulous areas with fixed implant restorations provided the patient with esthetic and functional outcomes...
February 22, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30768738/susceptibility-to-oral-antiseptics-and-virulence-factors-ex-vivo-associated-with-candida-spp-isolated-from-dental-prostheses
#18
Amir Horiquini Barbosa, Jaqueline Lopes Damasceno, Luciana Assirati Casemiro, Carlos Henrique Gomes Martins, Regina Helena Pires, Regina Célia Candido
PURPOSE: To isolate Candida spp. from dental prosthesis users' saliva and to evaluate the isolates for the presence of several virulence factors. This research also aimed to investigate the antifungal activity of 3 commercial mouthwashes/oral antiseptic formulations containing 0.12% chlorhexidine, 0.07% cetylpyridinium, or 0.075% cetylpyridinium against planktonic and sessile (biofilm mode) yeast cells. MATERIALS AND METHODS: Forty-three Candida yeasts were isolated from 32 of 70 selected patients, and the virulence factors of C...
February 15, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30767324/displacement-of-simulated-flabby-tissue-by-different-tray-designs-and-impression-materials
#19
Jae-Ok Shin, Kyung-Ho Ko, Yoon-Hyuk Huh, Lee-Ra Cho, Chan-Jin Park
PURPOSE: To compare the effect of 3 tray designs and 3 commonly used impression materials on the displacement of flabby tissue during maxillary edentulous impression by superimposition of 3D digital models. MATERIALS AND METHODS: Fifteen maxillary edentulous casts with simulated flabby tissue were fabricated by modifying a standard maxillary edentulous acrylic resin cast. Three types of impression trays were fabricated: trays with conventional relief, trays with additional relief, and trays with an open window...
February 15, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://read.qxmd.com/read/30737975/accuracy-of-dynamic-virtual-articulation-trueness-and-precision
#20
Michael R Hsu, Carl F Driscoll, Elaine Romberg, Radi Masri
PURPOSE: To study the effects of altering condylar settings and pin openings on the trueness and precision of virtual articulators vs. mechanical articulators. MATERIALS AND METHODS: Maxillary and mandibular typodonts with fiducial markers were mounted on a mechanical Artex-CR articulator, and the mandibular teeth were prepared to allow guidance solely by the posterior determinants of the articulator and the incisal table. The relationship of the mounted typodonts was preserved digitally by scanning using manufacturer transfer plate adaptors...
February 9, 2019: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
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