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https://www.readbyqxmd.com/read/28634635/erratum-to-long-term-success-of-dental-implant-supported-dentures-in-postirradiated-patients-treated-for-neoplasms-of-the-maxillofacial-skeleton-a-retrospective-study
#1
Yiqun Wu, Wei Huang, Zhiyong Zhang, Zhiyuan Zhang, Duohong Zou
No abstract text is available yet for this article.
June 21, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28630958/a-questionnaire-on-the-use-of-digital-denture-impressions-in-a-preclinical-setting
#2
Kerstin Wegner, Karin Michel, Paul Henryk Seelbach, Bernd Wöstmann
Since February 2010, intraoral scanning (Lava COS system, 3M ESPE, Seefeld, Germany) has been integrated into the preclinical curriculum at the Department of Prosthodontics of the Justus Liebig University. All students were given a lecture and were trained using a guided scan exercise. After preparing three teeth (mandibular first premolars and mandibular first molar in the 4th quadrant) for cast crowns, the students were asked to scan the maxillary and mandibular teeth. Their acceptance of the new module, "Scanning," was analyzed with the use of a questionnaire (n = 108)...
2017: International Journal of Computerized Dentistry
https://www.readbyqxmd.com/read/28629318/the-effect-of-a-daily-application-of-a-0-05-chlorhexidine-oral-rinse-solution-on-the-incidence-of-aspiration-pneumonia-in-nursing-home-residents-a-multicenter-study
#3
Vanessa R Y Hollaar, Gert-Jan van der Putten, Claar D van der Maarel-Wierink, Ewald M Bronkhorst, Bert J M de Swart, Nico H J Creugers
BACKGROUND: Dysphagia and potential respiratory pathogens in the oral biofilm are risk factors for aspiration pneumonia in nursing home residents. The aim of the study was to examine if the daily application of 0.05% chlorhexidine oral rinse solution is effective in reducing the incidence of aspiration pneumonia in nursing home residents with dysphagia. Associations between background variables (age, gender, dysphagia severity, care dependency, medication use, number of medical diagnoses, teeth and dental implants, and wearing removable dentures) and the incidence of aspiration pneumonia were also examined...
June 19, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/28628390/influence-of-screw-surface-treatment-on-retention-of-implant-supported-fixed-partial-dentures
#4
Marcos Boaventura de Moura, Renata Borges Rodrigues, Leandro Moreira Pinto, Cleudmar Amaral de Araújo, Veridiana Resende Novais, Paulo César Simamoto Júnior
The aim of this study was to assess the effect of DLC (Diamond-like carbon) coating on the removal torque of prefabricated implant screws after cyclic loading. Four groups with two crowns supported by two implants (n=5) were obtained according to splinted and non-splinted prosthesis, using titanium or DLC screw (STi, SC, NSTi and NSC). The prosthetic screws were tightened at 32Ncm, retightened, and the specimens were submitted to 106 mechanical cycles (4Hz/98N). After cyclic loading, loosening torque was evaluated and the final measurements were performed...
June 19, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28628350/custom-cast-ball-attachments-used-on-outdated-implants-to-restore-a-maxillary-implant-supported-overdenture
#5
Andressa Rosa Perin Leite, Danny Omar Mendoza Marin, Gabriela Giro, Ana Carolina Pero, Ligia Antunes Pereira Pinelli, JoséMauriciodos Santos Reis
The lack of compatible prosthetic components can be a complication during oral rehabilitations using outdated implants. The aim of the present clinical report was to describe an alternative technique for the fabrication of a maxillary implant-supported overdenture in a patient with 20-year-old dental implants using castable spherical patterns and ball-attachments. The patient had been wearing a relined bar/clip overdenture in the mandible on four external-hexagon dental implants and a relined complete denture in the maxilla on four internal-hexagon implants due to abutment screw fracture inside of the implants, losing the attachment system...
June 19, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28625665/color-stability-of-glass-fiber-reinforced-polypropylene-for-non-metal-clasp-dentures
#6
Manamu Nagakura, Yasuhiro Tanimoto, Norihiro Nishiyama
PURPOSE: The purpose of this study was to investigate the color stability of a glass-fiber-reinforced thermoplastic (GFRTP), for use in non-metal clasp dentures (NMCDs). METHODS: GFRTPs composed of E-glass fibers and polypropylene with 2 mass% of pigments were fabricated using injection molding. According to our previous study on the optimum fiber content for GFRTPs, we prepared GFRTPs with fiber contents of 0, 10, and 20 mass% (GF0, GF10, and GF20). Commercially available NMCD and PMMA materials were used as controls...
June 15, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28625664/effects-of-different-numbers-of-mini-dental-implants-on-alveolar-ridge-strain-distribution-under-mandibular-implant-retained-overdentures
#7
Pongsakorn Warin, Pimduen Rungsiyakull, Chaiy Rungsiyakull, Pathawee Khongkhunthian
PURPOSE: To investigate the strains around mini-dental implants (MDIs) and retromolar edentulous areas when using different numbers of MDIs in order to retain mandibular overdentures. MATERIALS AND METHODS: Four different prosthetic situations were fabricated on an edentulous mandibular model including a complete denture (CD), and three overdentures, retained by four, three or two MDIs in the interforaminal region with retentive attachments. A static load of 200N was applied on the posterior teeth of the dentures under bilateral or unilateral loading conditions...
June 15, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28625663/development-of-complete-dentures-based-on-digital-intraoral-impressions-case-report
#8
Jing-Huan Fang, Xueyin An, Seung-Mi Jeong, Byung-Ho Choi
PATIENT: A 60-year-old man presented for refabrication of his maxillary complete denture. In this case, a digital process was chosen to replace the ill-fitted complete maxillary denture. A specialized scan retractor was used to retract the mobile tissues of the lips, cheeks and vestibule while taking a digital impression. The interocclusal record obtained in the patient's mouth was scanned in order to digitally register the occlusal vertical dimension. The denture base and teeth were designed on virtual models that were mounted at the occlusal vertical dimension, and were made using CAD/CAM technology...
June 15, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28622020/the-effect-of-direct-and-indirect-force-transmission-on-peri-implant-bone-stress-a-contact-finite-element-analysis
#9
Annike Rand, Meike Stiesch, Michael Eisenburger, Andreas Greuling
In almost all finite element (FE) studies in dentistry, virtual forces are applied directly to dentures. The purpose of this study was to develop a FE model with non-linear contact simulation using an antagonist as force transmitter and to compare this with a similar model that uses direct force transmission. Furthermore, five contact situations were created in order to examine their influence on the peri-implant bone stresses, which are relevant to the survival rate of implants. It was found that the peri-implant bone stresses were strongly influenced by the kind of force transmission and contact number...
August 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28621288/photodvnamic-therapy-in-endodontics
#10
Zahed Mohammadi, Hamid Jafarzadeh, Sousan Shalavi, Jun-Ichiro Kinoshita
Commonly used irrigants do not always eradicate the entire microbial flora in infected root canals. Therefore, several other strategies, such as photodynamic therapy (PDT) have been developed. Photoactivated disinfection is based on the interaction of a photosensitive antibacterial agent and a light source. It uses a nontoxic dye named photosensitizer (PS) and low-intensity visible light. In oxygen presentation, these combine to produce some cytotoxic species. The PS molecules attach to bacteria membrane. Irradiation with a specific wavelength of the light may lead to the production of singlet oxygen, resulting in rupture of the microbial cell wall...
June 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28621037/gingival-morphology-controlled-design-of-the-complete-denture-baseplate
#11
Ning Dai, Xiaoling Yu, Yuchun Sun
A removable complete denture is still the main selection for edentulous patients. Over the last five years, digital technologies for producing complete dentures have rapidly developed. Nevertheless, the design method for the baseplate has become the bottleneck of digital complete denture technology development. In this study, we report a novel method for the generation of aesthetic gingiva and polished surfaces of complete dentures that are driven by the feature curve, which can be conveniently modified using the gingival shape factor...
June 16, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28620638/evaluation-of-the-color-stability-of-methyl-methacrylate-and-nylon-base-polymer
#12
Fahimeh Hamedi Rad, Tahereh Ghaffari, Raana Tamgaji
STATEMENT OF THE PROBLEM: Evaluation of the color stability of materials used for the fabrication of the base of complete and partial removable dentures provides important information in relation to their clinical service. The color stability of nylon-based polymers as denture bases, compared to that of acrylic resins, has not been extensively evaluated since to date. PURPOSE: The aim of the present in vitro study was to evaluate the color stability of conventional polymethyl methacrylate and nylon-based polymer materials used for the fabrication of the base of complete and partial removable dentures...
June 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28613056/-a-preliminary-study-on-the-forming-quality-of-titanium-alloy-removable-partial-denture-frameworks-fabricated-by-selective-laser-melting
#13
Y F Liu, H Yu, W N Wang, B Gao
Objective: To evaluate the processing accuracy, internal quality and suitability of the titanium alloy frameworks of removable partial denture (RPD) fabricated by selective laser melting (SLM) technique, and to provide reference for clinical application. Methods: The plaster model of one clinical patient was used as the working model, and was scanned and reconstructed into a digital working model. A RPD framework was designed on it. Then, eight corresponding RPD frameworks were fabricated using SLM technique...
June 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28613055/-comparison-of-adaptation-and-microstructure-of-titanium-upper-complete-denture-base-fabricated-by-selecting-laser-melting-and-electron-beam-melting
#14
Y Ye, Y Y Xiong, J R Zhu, J Sun
Objective: To fabricate Ti alloy frameworks for a maxillary complete denture with three-dimensional printing (3DP) technique, such as selective laser melting (SLM) and electron beam melting (EBM), and to evaluate the microstructure of these frameworks and their adaptation to the die stone models. Methods: Thirty pairs of edentulous casts were divided into 3 groups randomly and equally. In each group, one of the three techniques (SLM, EBM, conventional technique) was used to fabricate Ti alloy frameworks. The base-cast sets were transversally sectioned into 3 sections at the distal of canines, mesial of first molars, and the posterior palatal zone...
June 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28613054/-quantitative-evaluation-of-printing-accuracy-and-tissue-surface-adaptation-of-mandibular-complete-denture-polylactic-acid-pattern-fabricated-by-fused-deposition-modeling-technology
#15
K H Deng, Y Wang, H Chen, Y J Zhao, Y S Zhou, Y C Sun
Objective: To quantitatively evaluate the adaptation of polylactic acid (PLA) pattern of mandibular complete denture fabricated by fused deposition modeling (FDM) technology. Methods: A mandibular complete denture digital model was designed through a complete denture design software based on a pair of standard maxillomandibular edentulous plaster model and their occlusion bases. Ten PLA mandibular complete dentures were printed with a FDM machine. The dentures were scanned with and without the plaster model using a three-dimensional (3D) scanner...
June 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28613053/-application-of-negative-molds-technology-based-on-three-dimensional-printing-in-digital-maxillofacial-prostheses
#16
X Y Gu, X B Chen, T Jiao, F Q Zhang, X Q Jiang
Objective: To explore a digital negative molds technique based on three-dimensional (3D) printing to assist in the manufacture of maxillofacial prostheses, and to improve the deficiency of the current clinical treatment. Methods: Seventeen patients with maxillofacial defects (including nasal defects, orbital defects, cheek defects, auricle defect) were scanned by means of facial optical scanning and computer tomography (CT). The 3D models were then reconstructed and global registration was made to merge the reconstructed models into a new digital model for 3D design...
June 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28606420/pressure-transmission-area-and-maximum-pressure-transmission-of-different-thermoplastic-resin-denture-base-materials-under-impact-load
#17
Hubban Nasution, Krid Kamonkhantikul, Mansuang Arksornnukit, Hidekazu Takahashi
PURPOSES: The purposes of the present study were to examine the pressure transmission area and maximum pressure transmission of thermoplastic resin denture base materials under an impact load, and to evaluate the modulus of elasticity and nanohardness of thermoplastic resin denture base. METHODS: Three injection-molded thermoplastic resin denture base materials [polycarbonate (Basis PC), ethylene propylene (Duraflex), and polyamide (Valplast)] and one conventional heat-polymerized acrylic resin (PMMA, SR Triplex Hot) denture base, all with a mandibular first molar acrylic resin denture tooth set in were evaluated (n=6)...
June 9, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28606025/esophageal-foreign-bodies-in-adults-with-different-durations-of-time-from-ingestion-to-effective-treatment
#18
Xiaowen Zhang, Yan Jiang, Tao Fu, Xiaoheng Zhang, Na Li, Chunmei Tu
Objective This study was performed to identify the differences in clinical characteristics, operative methods, complications, and postoperative hospitalization stays for adults with esophageal foreign bodies with different durations of time from ingestion to effective treatment. Methods We retrospectively reviewed the medical records of 221 patients with a diagnosis of a foreign body in the esophagus, confirmed by rigid esophagoscopy, flexible esophagoscopy, or surgery. The differences between the two groups (Group A, ≤24 hours from ingestion to effective treatment; Group B, >24 hours from ingestion to effective treatment) were analyzed...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28605598/dental-status-and-compression-of-life-expectancy-with-disability
#19
Y Matsuyama, J Aida, R G Watt, T Tsuboya, S Koyama, Y Sato, K Kondo, K Osaka
This study examined whether the number of teeth contributes to the compression of morbidity, measured as a shortening of life expectancy with disability, an extension of healthy life expectancy, and overall life expectancy. A prospective cohort study was conducted. A self-reported baseline survey was given to 126,438 community-dwelling older people aged ≥65 y in Japan in 2010, and 85,161 (67.4%) responded. The onset of functional disability and all-cause mortality were followed up for 1,374 d (follow-up rate = 96...
June 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28602850/repair-may-increase-survival-of-direct-posterior-restorations-a-practice-based-study
#20
Luciano Casagrande, Mark Laske, Ewald M Bronkhorst, Marie Charlotte D N J M Huysmans, Niek J M Opdam
OBJECTIVES: To investigate repairs of direct restorations by a group of Dutch general dental practitioners (GDPs) and its consequences on longevity of restorations. METHODS: Data set was based on dental records of patients attending 11 general dental practices (24 Dentists) in the Netherlands. Patients that received Class II Amalgam or Composite restorations were included in the study. The outcomes were considered in two levels: "Success" - When no intervention was necessary on the original restoration, it was considered clinically acceptable...
June 8, 2017: Journal of Dentistry
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