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Dental crowns

N Rostami, R C Shields, S A Yassin, A R Hawkins, L Bowen, T L Luo, A H Rickard, R Holliday, P M Preshaw, N S Jakubovics
Extracellular DNA (eDNA) has been identified in the matrix of many different monospecies biofilms in vitro, including some of those produced by oral bacteria. In many cases, eDNA stabilizes the structure of monospecies biofilms. Here, the authors aimed to determine whether eDNA is an important component of natural, mixed-species oral biofilms, such as plaque on natural teeth or dental implants. To visualize eDNA in oral biofilms, approaches for fluorescently stained eDNA with either anti-DNA antibodies or an ultrasensitive cell-impermeant dye, YOYO-1, were first developed using Enterococcus faecalis, an organism that has previously been shown to produce extensive eDNA structures within biofilms...
October 21, 2016: Journal of Dental Research
Takashi Nakamura, Yuta Chiba, Masahiro Naruse, Kan Saito, Hidemitsu Harada, Satoshi Fukumoto
Tooth crown morphogenesis is tightly regulated by the proliferation and differentiation of dental epithelial cells. Globoside (Gb4), a globo-series glycosphingolipid, is highly expressed during embryogenesis as well as organogenesis, including tooth development. We previously reported that Gb4 is dominantly expressed in the neutral lipid fraction of dental epithelial cells. However, because its functional role in tooth development remains unknown, we investigated the involvement of Gb4 in dental epithelial cell differentiation...
October 21, 2016: International Journal of Oral Science
Fernanda D Santa-Maria, Luiza Monteavaro Mariath, Cláudia S Poziomczyk, Marcia A P Maahs, Rafael F M Rosa, Paulo R G Zen, Lavínia Schüller-Faccini, Ana Elisa Kiszewski
OBJECTIVES: Current knowledge on dental anomalies in patients with incontinentia pigmenti (IP) has been obtained by examining case reports; however, an overall characterization of such alterations remains lacking. The objective of this study was to determine the frequency, type and location of dental alterations in IP using a case series. METHODS: Fourteen patients (9 children and 5 adults) with a clinical diagnosis of IP who presented dental anomalies were included in this study...
October 20, 2016: Clinical Oral Investigations
Veerasamy Yengopal, Soraya Yasin Harnekar, Naren Patel, Nandi Siegfried
BACKGROUND: Childhood caries (tooth decay) consists of a form of tooth decay that affects the milk teeth (also known as baby or primary teeth) of children. This may range from tooth decay in a single tooth to rampant caries affecting all the teeth in the mouth. Primary teeth in young children are vital to their development and every effort should be made to retain these teeth for as long as is possible. Dental fillings or restorations have been used as an intervention to repair these damaged teeth...
October 17, 2016: Cochrane Database of Systematic Reviews
Osman Sabuncuoglu, Mustafa Yasin Irmak
It has been more than 10 years since the proposal of attention deficit/hyperactivity disorder (ADHD) model as an explanatory construct for traumatic dental injuries (TDIs) in children. The aim of this review was to address developments in the study of the issue after 2005 to 2016. A systematic literature search covering the period from 2005 to 2016 was conducted on PubMed, the Cochrane library and Google Scholar using relevant keywords. Fourteen studies exploring the relationship between ADHD and TDIs from 2005 and onwards (including the proposal paper) were identified...
October 17, 2016: Dental Traumatology: Official Publication of International Association for Dental Traumatology
Daisuke Ueno, Jayanetti Asiri Jayawardena, Takashi Kurokawa
Soft tissue dehiscence around dental implant has frequently been observed and it may lead to poor oral hygiene, especially around crowns that exhibit contours with prominent convexity. The present case demonstrates a peri-implant mucosal dehiscence coverage with modified semilunar coronary positioned flap (CPF) in #15 and 16. A semilunar partial-thickness incision was performed 7-10 mm apical from the facial gingival margin. Then, intrasulcular partial-thickness incision was tunneled to the semilunar incision...
December 2015: Int J Implant Dent
Aradhana Nagarsekar, Ridhima Gaunkar, Meena Aras
OBJECTIVE: This survey was undertaken to assess dentist's opinion regarding the occurrence and pattern of food impaction in relation to fixed partial denture (FPD) prostheses, its commonly observed consequences, factors contributing to it, and its management. METHODS: A descriptive survey was conducted on a sample size of 150 dental practitioners. The pro forma consisted of informed consent, demographic information, and questionnaire. The results were tallied and quantitative analysis was performed to obtain the descriptive statistics for the data using SPSS version 20...
October 2016: Journal of Indian Prosthodontic Society
Gerardo Mendoza-Azpur, Miguel Lau, Erick Valdivia, Jorge Rojas, Henry Muñoz, Myron Nevins
In oral rehabilitation, crown-to-root ratio is accepted as an indicator of bone loss, and this concept was transferred to implants. Recent studies have indicated that there is no significant difference between short and standard implants. The aim of this study was to compare marginal bone-level alteration through radiographic evaluation and clinical parameters between short and standard implants supporting single crowns. This prospective clinical trial study included 82 systemically healthy, nonsmoking subjects...
November 2016: International Journal of Periodontics & Restorative Dentistry
Ken-Ichi Mizuno, Kazuya Takahashi, Kentaro Tominaga, Yuki Nishigaki, Hiroki Sato, Satoshi Ikarashi, Kazunao Hayashi, Takashi Yamamoto, Yutaka Honda, Satoru Hashimoto, Kenya Kamimura, Manabu Takeuchi, Junji Yokoyama, Yuichi Sato, Masaaki Kobayashi, Shuji Terai
Background. Dentures and dental instruments are frequently encountered ingested foreign bodies. The aim of the present study was to assess the safety and efficacy of endoscopically removing ingested dental objects. Methods. Twenty-nine consecutive patients with 29 dental objects who were treated at the Niigata University Medical and Dental Hospital from August 2009 to December 2015 were retrospectively reviewed. Characteristics of the patients and the ingested dental objects, the clinical features and findings of radiological imaging tests, and outcomes of endoscopic removal were analyzed...
2016: Gastroenterology Research and Practice
Bernardo Antonio Agostini, Lisara Tosatto Pinto, Mariangélica Koehler, Bruno Emmanuelli, Chaiana Piovesan, Thiago Machado Ardenghi
The aim of this study was to assess trends in traumatic crown injuries (TCIs), their prevalence, and association with socioeconomic and clinical factors in preschool children over a 5-year period. A series of cross-sectional surveys was conducted in Santa Maria, Brazil, on children attending a National Day of Children's Vaccination. The same protocol was used in all surveys conducted in 2008, 2010, and 2013. Clinical examinations were performed to evaluate types of traumatic crown injuries using the O'brien index...
October 10, 2016: Brazilian Oral Research
Guilherme Teixeira Theodoro, Lívia Fiorin, Izabela Cristina Maurício Moris, Renata Cristina Silveira Rodrigues, Ricardo Faria Ribeiro, Adriana Cláudia Lapria Faria
Dental ceramics have been widely used because of aesthetic, but wear is still questioned. There are relates that ceramic surface is prone to degradation by acidulated fluoride, that can increase wear rates. The aim of this study was to evaluate the effect of neutral and acidulated fluoride gel, used as preventive agents for professional use, at wear and compression strength of dental ceramics IPS e.max ZirPress (ZIR), IPS Empress Esthetic (EMP) e IPS Inline POM (POM). For this, 30 crowns and 30 disks were obtained by heat-pressing...
September 28, 2016: Journal of the Mechanical Behavior of Biomedical Materials
Edna Perez, Linda S Behar-Horenstein, Marcio Guelmann
Children with intellectual and physical disabilities including autism are susceptible to dental trauma as a sequela from falls due to poor muscular coordination. In addition, their altered muscle tonus often results in an open bite with labial flaring of the maxillary incisors and lip incompetence, predisposing these teeth to fractures. This case report describes an alternative approach of restoring a fractured maxillary permanent central incisor with a composite strip crown during surgical repositioning of the periodontium on an autistic patient...
September 1, 2016: Journal of Contemporary Dental Practice
Moreangels M Mbizah, Gerhard Steenkamp, Rosemary J Groom
African wild dogs (Lycaon pictus) are endangered and their population continues to decline throughout their range. Given their conservation status, more research focused on their population dynamics, population growth and age specific mortality is needed and this requires reliable estimates of age and age of mortality. Various age determination methods from teeth and skull measurements have been applied in numerous studies and it is fundamental to test the validity of these methods and their applicability to different species...
2016: PloS One
Mario Imburgia, Angelo Canale, Davide Cortellini, Marco Maneschi, Claudio Martucci, Marco Valenti
The esthetic treatment of anterior teeth has always presented a challenge in clinical practice. With the improvement of dental materials, many restorative options such as composite resins, all-ceramic crowns, and ceramic veneers have become available. The current challenge in reconstructive dentistry is to obtain excellent esthetic results while preserving the biological structures involved as much as possible. Thanks to the introduction of high-strength etchable dental ceramics, clinicians and technicians have materials and procedures at their disposal that allow them to restore esthetics and function through a minimally invasive approach...
2016: International Journal of Esthetic Dentistry
Irena Sailer, Nikolay Alexandrovich Makarov, Daniel Stefan Thoma, Marcel Zwahlen, Bjarni Elvar Pjetursson
No abstract text is available yet for this article.
October 7, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
Tim Hilgenfeld, Marcel Prager, Franz Sebastian Schwindling, Alexander Heil, Stefan Kuchenbecker, Peter Rammelsberg, Martin Bendszus, Sabine Heiland
PURPOSE: MRI allows radiation-free imaging of the head and neck area. However, implant-supported prostheses may severely impair image quality due to artefacts. Therefore, identification of preferable material compositions for implants and supported prostheses with little impact on MR image quality is mandatory. MATERIALS AND METHODS: Overall, one zirconia and four titanium dental implants were provided with different single crown materials: porcelain-fused-to-metal precious alloy (GP-T), porcelain-fused-to-metal non-precious alloy (CCT-T), porcelain-fused-to-zirconia (ZC-T) and monolithic zirconia (Z-T, Z-Z)...
2016: European Journal of Oral Implantology
Chi-Young Yun, Hwajung Choi, Young-Jae You, Jin-Young Yang, Jin-A Baek, Eui-Sic Cho
Dentin is the major part of tooth and formed by odontoblasts. Under the influence of the inner enamel epithelium, odontoblasts differentiate from ectomesenchymal cells of the dental papilla and secrete pre-dentin which then undergo mineralization into dentin. Transforming growth factor-beta (TGF-β)/bone morphogenetic protein (BMP) signaling is essential for dentinogenesis; however, the precise molecular mechanisms remain unclear. To understand the role of TGF-β/BMP signaling in odontoblast differentiation and dentin formation, we generated mice with conditional ablation of Smad4, a key intracellular mediator of TGF-β/BMP signaling, using Osr2 or OC-Cre mice...
September 2016: Anatomy & Cell Biology
Y Wang, Y Lin, B Chen, Y Zhang, P Di, C Yi
Objective: To assess and compare the radiographic outcomes of immediate implant placement with two different loading timing. Methods: The involved cases were collected from Department of Implantology, Peking University School and Hospital of Stomatology. Patients recieved immediate implant placement during 2010 Aug to 2012 Dec. The cases admitted delayed restoration program were assigned to Group Ⅰ(18 patients with 21 implants), the cases admitted immediate restoration program were assigned to Group Ⅱ (16 patients with 22 implants)...
October 9, 2016: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
Miguel A Roque, German O Gallucci, Sang J Lee
PURPOSE: To describe the occlusal pressure redistribution in dental arches following placement of single posterior implant-supported restorations in occlusion with natural dentitions. MATERIALS AND METHODS: Fifteen patients who presented for successfully osseointegrated single posterior implant restorations participated in the study. Cement-retained, all-ceramic implant crowns were fabricated and delivered after adjustment for interproximal contacts, fit, and uniform occlusal contacts...
October 5, 2016: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
S Barone, A Paoli, A V Razionale, R Savignano
Transparent and removable aligners represent an effective solution to correct various orthodontic malocclusions through minimally invasive procedures. An aligner-based treatment requires patients to sequentially wear dentition-mating shells obtained by thermoforming polymeric disks on reference dental models. An aligner is shaped introducing a geometrical mismatch with respect to the actual tooth positions to induce a loading system, which moves the target teeth toward the correct positions. The common practice is based on selecting the aligner features (material, thickness, and auxiliary elements) by only considering clinician's subjective assessments...
October 5, 2016: International Journal for Numerical Methods in Biomedical Engineering
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