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International Journal of Prosthodontics

Ufuk Adali, Sven Schober, Florian Beuer, Benedikt C Spies
In most cases, prosthetic rehabilitation of patients suffering from microstomia is inconvenient for the patient and challenging for both the dentist and dental technician. In such cases, conventional impression-taking requires an individualized tray design and modified impression techniques, amplifying the risk for impression and cast deformation and thereby compromising the final outcome. An intraoral scanner (IOS) might overcome these limitations due to its reduced size compared to an impression tray. In the present case history report, a microstomia patient was successfully restored with a telescopic prosthesis by digitizing both retaining teeth and the palate with an IOS...
September 6, 2018: International Journal of Prosthodontics
Karen R Bennie, Meriting G Thokoane, C Peter Owen
PURPOSE: To assess the illuminant metamerism of three different pigments used for maxillofacial prostheses under three different illumination sources and to standardize subjective shade-matching and observation protocols. MATERIALS AND METHODS: Nine silicone shade tabs were constructed for three volunteers who had light, medium, and dark skin tones using make-up, oil paint, or silicone pigments (three shade tabs per volunteer). A shade recipe was recorded during session one, and further tabs were constructed by following the recipe at two subsequent sessions...
September 6, 2018: International Journal of Prosthodontics
France Foucher, Amélie K Mainjot
Functional and esthetic oral rehabilitation of young patients affected by ectodermal dysplasia is traditionally performed with direct composite restorations, which encounter various limitations. However, recent advances in computer-aided design/computer-assisted manufacturing (CAD/CAM) composites have led to the introduction of high-performance materials. In the present case report, a 9-year-old patient was treated with 20 CAD/CAM partial and peripheral restorations in polymer-infiltrated-ceramic-network material to restore deciduous and permanent teeth...
September 6, 2018: International Journal of Prosthodontics
Patrícia Krieger Grossi, Caroline Hoffmann Bueno, Mariana Álvares de Abreu Silva, Eduardo Piza Pellizzer, Márcio Lima Grossi
PURPOSE: To compare the prevalence of physical and sexual abuse in women with temporomandibular disorders (TMD) vs women without TMD. METHODS: Forty women (age range 16-45 years) with idiopathic TMD were selected from the Occlusion Clinic at the Pontifical Catholic University of Rio Grande do Sul Faculty of Dentistry and were compared to 40 TMD-free women within the same age range. The Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) Axes I and II and the Sexual Abuse History Questionnaire (S/PAHQ) were used to collect data...
September 6, 2018: International Journal of Prosthodontics
Koichiro Kamei, Tomoya Gonda, Toshihito Takahashi, Yoshinobu Maeda
PURPOSE: The purpose of this study was to determine the optimal positioning of implants for maxillary implant-supported overdentures (MIODs) using finite element analysis (FEA). MATERIALS AND METHODS: Three-dimensional (3D) finite element models were built incorporating the maxilla, mucous membrane, removable denture, and artificial teeth using FEA software. Four models were prepared: one without an implant; one with two implants in the region of the lateral incisor; one with two implants in the first premolar region; and one with four implants in the lateral incisor and first premolar regions...
September 6, 2018: International Journal of Prosthodontics
Adrien Naveau, Christophe Bou, Arun Sharma
PURPOSE: To study the evolution of recent topics in maxillofacial prosthetics (MP) research. MATERIALS AND METHODS: Science mapping analyses were used to measure bibliometric similarities among articles extracted from the Web of Science from the last three decades. RESULTS AND CONCLUSION: Keyword co-occurrence highlighted the rise of computer-aided design/computer-assisted manufacturing, mandibular reconstruction, and extraoral prostheses during the last decade...
September 6, 2018: International Journal of Prosthodontics
Se-Mok Oh, Jin-Wook Kim, So-Young Choi, Du-Hyeong Lee
The fibular free flap (FFF) approach is the preferred option for reconstruction of segmental mandibular deficiencies. Fixed dental prostheses are recommended for patients who have undergone FFF jaw surgery to improve quality of life, but treatment of these patients with an implant-supported prosthesis is challenging because of the thin bone and thick soft tissue in the fibula. This case history reports the use of a bone-level implant guide fabricated with a computer-aided system and milled customized long abutments for implant placement and prosthodontic procedures...
September 6, 2018: International Journal of Prosthodontics
Dagmar Schnabl, Stefan Gerhard, Rainer Biedermann, Adriano Crismani, Michael Rasse, Konstantin Zauza, Matthias Schmuth, Ines Kapferer-Seebacher
The prosthetic restoration and dental long-term care of two oligodont male cousins suffering from X-linked hypohidrotic ectodermal dysplasia is described in two case histories. The first patient was three times supplied with removable dentures at an age from 5 to 12 years, and the second patient was restored twice by tooth- and implant-supported dentures within an observation period of 10 years. In both patients, implants were placed in the growing jaw (both arches) in order to enhance denture retention by single attachments and/or a palatinal bar...
September 6, 2018: International Journal of Prosthodontics
Mohammad Zakaria Nassani, Elizabeth Jane Kay, Shukran Ibraheem, Saleh Judaia Alanazi, Mahmoud Darwish
PURPOSE: This study aimed to assess dentists' views of the utility of an unrestored shortened dental arch (SDA) compared to the utility of various prosthetic treatment options. MATERIALS AND METHODS: A total of 142 dentists working at four sites in Riyadh, Saudi Arabia, were interviewed and presented with 18 scenarios for patients of different ages with SDAs that lost molar teeth. Participants were asked to indicate on a standardized visual analog scale (VAS) how they would value the health of the patient's mouth if the SDAs were left unrestored or restored with five prosthetic dental restorations...
September 2018: International Journal of Prosthodontics
Canan Bural, Melahat Çelik Güven, Büşra Kayacıoğlu, Gülsüm Ak, Gülsen Bayraktar, Hakan Bilhan
PURPOSE: To investigate the effects of over-the-counter products on the healing of denture-induced ulcerations and patients' self-reported pain. MATERIALS AND METHODS: A total of 140 patients with acute denture-induced ulcerations were randomized into seven treatment groups: denture grinding (control); topical application of corn oil gel (placebo); triester glycerol oxide gel; D-panthenol gel; D-panthenol mouthwash; L-arginine mouthwash; and hyaluronic acid gel...
September 2018: International Journal of Prosthodontics
Jeison B Carbajal Mejía, Kazumichi Wakabayashi, Takashi Nakamura, Hirofumi Yatani
PURPOSE: To evaluate the fracture resistance of computer-aided design/computer-assisted manufactured (CAD/CAM) glass-ceramic incisor crowns fabricated on reverse-tapered preparations. MATERIALS AND METHODS: Resin abutments with known total occlusal convergence angles (-8, 0, and 12 degrees; n = 20) were scanned with the TRIOS scanner, and glass-ceramic crowns were fabricated with KaVo Arctica, stored in water for either 1 or 30 days, and submitted to fracture test...
September 2018: International Journal of Prosthodontics
Safoura Ghodsi, Somayeh Zeighami, Mojdeh Meisami Azad
PURPOSE: This study was conducted to compare the fit and retention of implant-supported, metal-free copings fabricated from zirconia, polyetheretherketone (PEEK), or composite, as well as to evaluate the possible correlation between internal adaptation and retention. MATERIALS AND METHODS: A total of 36 copings were milled from zirconia, PEEK, or composite blanks (n = 12 in each group). Marginal and internal gap were evaluated by replica technique, and the pull-out test was used to evaluate retention...
September 2018: International Journal of Prosthodontics
Benedikt C Spies, Matthias Petsch, Ralf-Joachim Kohal, Florian Beuer
Several attachment systems for implant-supported removable dental prostheses (ISRDPs) are currently available. The bar attachment option includes cast or milled alloyed male and female parts. Replaceable slide attachments made from elastic materials can be inserted into the female part of the bar to counter loss of friction that develops due to wear. Another approach involves milling the female part from organic thermoplastic polymers. In the present case history report, an edentulous maxilla was restored with a digitally fabricated ISRDP with the female part of the bar milled from polyether ether ketone (PEEK) polymerized into a zirconia framework...
September 2018: International Journal of Prosthodontics
Karina Zierden, Luisa Kurzrock, Bernd Wöstmann, Peter Rehmann
PURPOSE: The purpose of this retrospective clinical study was to evaluate the clinical outcomes of nonprecious alloy (NPA) vs precious alloy (PA) telescopic crown-retained removable partial dentures (TRPDs), the factors influencing survival, and the type and number of maintenance procedures required during the observation period. MATERIALS AND METHODS: This retrospective clinical study is based on 462 patients with a total of 572 TRPDs on a total of 1,946 abutment teeth...
September 2018: International Journal of Prosthodontics
Hilit Bar-On, Ami Smidt, Asher Zabrovsky, Gilad Ben-Gal, Nurit Beyth
PURPOSE: Methods for removing temporary cement with an antibacterial effect might improve prosthetic treatment prognosis. MATERIALS AND METHODS: Three removal methods were assessed: (1) immersion of an acrylic provisional restoration in a temporary cement dissolver (Temp-off); (2) mechanical removal with a dental explorer; and (3) sandblasting. Two temporary cements, one with eugenol (Temp-Bond) and one without eugenol (Temp-Bond NE) and of two thicknesses (100 μm and 250 μm), were examined...
September 2018: International Journal of Prosthodontics
Maria Menini, Francesco Pera, Fabrizio Barberis, Gaia Rosenberg, Francesco Bagnascoa, Paolo Pesce
PURPOSE: To assess bond strength and failure patterns of carbon fiber-reinforced composite (CFRC) and veneering materials. MATERIALS AND METHODS: A total of 20 samples were prepared: 10 veneered with polymethylmethacrylate (group A) and 10 with composite resin (group B). Shear bond strength (SBS) was measured, and failed samples were microscopically observed. RESULTS: The mean ± standard deviation (SD) SBS of specimens in group A was slightly higher (7...
September 2018: International Journal of Prosthodontics
Nadine Freifrau von Maltzahn, Omar Ibrahim El Meniawy, Niko Breitenbuecher, Philipp Kohorst, Meike Stiesch, Michael Eisenburger
PURPOSE: To evaluate the load at fracture and influence of artificial aging of posterior teeth occlusal veneers ("table tops") made of two different ceramics. MATERIALS AND METHODS: A total of 80 table tops were produced from feldspathic ceramic (VM) and zirconia-reinforced lithium silicate ceramic (CD) using computer-aided design/computer-assisted manufacturing (CAD/CAM). Half of the specimens from each ceramic were aged prior to the load test. RESULTS: Mean ± standard deviation (SD) load at fracture was significantly higher for CD (1,571...
September 2018: International Journal of Prosthodontics
Stefanie Anke Rau, Michael Raedel, Aikaterini Mikeli, Martina Raedel, Michael H Walter
PURPOSE: To analyze the clinical fit of monolithic zirconia single crowns (MZSCs) in a prospective cohort study. MATERIALS AND METHODS: A total of 30 posterior teeth were restored with MZSCs. Silicone replicas were made to measure the clinical fit using a stereomicroscope. Measurements were conducted at 17 points per crown at the marginal and occlusal surfaces. RESULTS: The mean clinical fit was 0.104 mm at the crown margin and 0.101 mm at the occlusal surface...
September 2018: International Journal of Prosthodontics
Yasmin Osman Latib, C Peter Owen, Mrudula Patel
PURPOSE: To quantify the depth of penetration of Candida albicans (C albicans) into a denture base resin and to investigate its viability after disinfection. MATERIALS AND METHODS: Heat-polymerizing polymethyl methacrylate plates were contaminated with C albicans, then washed, dried, and prepared for scanning electron microscopy (SEM). Vertical surfaces were cut, and the depth of any penetration was measured. For viability after disinfection, plates were contaminated, subjected to one of two disinfection techniques, and subcultures were taken to determine viability...
September 2018: International Journal of Prosthodontics
Torsten Jemt
PURPOSE: To report retro-prospective data on the prevalence of overall implant failure in a large number of edentulous patients treated at one referral clinic over a 30-year period and to analyze possible associations between implant failure and basic clinical variables. MATERIALS AND METHODS: Altogether, 24,781 implants were consecutively placed in 4,585 edentulous arches between 1986 and 2015. All implant failures identified at the clinic during follow-up were consecutively recorded, and a multivariate logistic regression analysis was performed to identify possible associations between implant failure and different clinical factors...
September 2018: International Journal of Prosthodontics
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