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https://www.readbyqxmd.com/read/28486144/impacts-of-uvb-radiation-on-food-consumption-of-forest-specialist-tadpoles
#1
James Eduardo Lago Londero, Caroline Peripolli Dos Santos, Ana Lúcia Anversa Segatto, André Passaglia Schuch
Solar ultraviolet radiation B (UVB) is an important environmental stressor for amphibian populations due to its genotoxicity, especially in early developmental stages. Nonetheless, there is an absence of works focused on the UVB effects on tadpoles' food consumption efficiency. In this work, we investigated the effects of the exposure to a low environmental-simulated dose of UVB radiation on food consumption of tadpoles of the forest specialist Hypsiboas curupi [Hylidae, Anura] species. After UVB treatment tadpoles were divided and exposed to a visible light source or kept in the dark, in order to indirectly evaluate the efficiency of DNA repair performed by photolyases and nucleotide excision repair (NER), respectively...
May 6, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28484652/esthetic-rehabilitation-with-direct-composite-veneering-a-report-of-2-cases
#2
Kyatham Sowmya, K S Dwijendra, V Pranitha, Konda Karthik Roy
Esthetic or cosmetic dentistry is one of the main areas of dental practice. Increasing demand of patients for esthetics has resulted in the development of several techniques for restoring the anterior teeth. Composite resin restorations have become an integral part of contemporary restorative dentistry and can be called "star of minimal invasion" due to its conservative concepts. The direct composite veneering allows restoring the tooth in a natural way and preservation of sound tooth structure when compared to indirect restorations...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28475095/functional-and-esthetic-rehabilitation-of-a-child-with-amelogenesis-imperfecta-a-case-report
#3
Carmem Dolores Vilarinho Soares de Moura, Alessandra Silva Pontes, Teresinha Soares Pereira Lopes, Lúcia Fátima Almeida de Deus Moura, Marina Deus Moura de Lima
Amelogenesis imperfecta (AI) is a tooth disorder characterized by the abnormal development of the enamel in response to mutations in the genes involved in amelogenesis. The objective of this article is to present the clinical case of a child with AI in the primary dentition phase. A 4-year-old boy was presented to a clinic by his mother, who complained that her son's smile esthetics were compromised by "weak and yellow teeth." All the teeth showed yellowish discoloration as well as crumbling or missing enamel...
May 2017: General Dentistry
https://www.readbyqxmd.com/read/28474492/vertical-root-fractures-in-endodontically-treated-teeth-a%C3%A2-retrospective-analysis-of-possible-risk-factors
#4
Claudia García-Guerrero, Claudia Parra-Junco, Sara Quijano-Guauque, Nicolás Molano, Gerardo A Pineda, Dairo J Marín-Zuluaga
AIM: The prevalence of vertical root fractures (VRF) ranges from 2% to 20%, and is associated with endodontically-treated teeth (ETT). The aim of the present study was to analyze clinically and radiographically, at different intervals of time, some of the risk factors present in ETT that developed VRF. METHODS: A classification model according to time measured the follow-up period of three groups. A match was made for times of occurrence (cases) and follow up (controls)...
May 5, 2017: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/28459247/conservative-functional-and-esthetic-rehabilitation-of-severe-palatal-erosion-class-iv-using-modified-dahl-approach
#5
Aliasger Tunkiwala, Rajeev Chitguppi
This article demonstrates the clinical application of biomechanical and occlusal principles to conservatively provide optimal clinical outcomes in restoring an eroded anterior dentition. The authors manage a challenging case involving limited palatal clearance (ie, deep bite) coupled with palatal erosion and wear by combining the centric relation (CR) and Dahl principles to create anterior interocclusal space to reduce the need for more invasive palatal reduction. The combined use of adhesive restorations-resin composites on the palatal surface and indirect porcelain veneers on the facial/incisal surfaces-through enamel and dentin bonding helped optimize esthetic and functional/biomechanical aspects...
May 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/28459245/does-post-etching-cleaning-influence-bond-strength-of-lithium-disilicate-laminate-veneers
#6
Ana Paula Rodrigues Magalhães, Rafael Almeida Decurcio, Gerardo Patricio Durán Ojeda, Terence Romano Teixeira, Paula de Carvalho Cardoso
This paper aims to present a clinical case of laminate veneers in lithium disilicate (LD) reinforced ceramic, complemented with scanning electron microscopy and energy dispersive x-ray spectroscopy analysis of this ceramic's surfaces submitted to some of the different post-etching cleaning protocols proposed by literature. Many dentists are applying all-ceramic restorations, especially veneers, with the most applied material being LD, due to its good mechanical properties, esthetics, and ability to adhere to tooth substrate...
May 2017: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/28422359/clinical-evaluation-of-indirect-particle-filled-composite-resin-cad-cam-partial-crowns-after-24-months
#7
Moritz Zimmermann, Christina Koller, Marcel Reymus, Albert Mehl, Reinhard Hickel
PURPOSE: Resin-based CAD/CAM compound materials might be promising for single-tooth restorations. Insufficient clinical data are available for this new material class. The purpose of this study was to describe initial clinical in vivo results for indirect particle-filled composite resin CAD/CAM restorations after 24 months. MATERIALS AND METHODS: Indirect particle-filled composite resin restorations were fabricated with a CAD/CAM method (CEREC Bluecam intraoral scanner, CEREC MCXL milling unit) by calibrated dental students...
April 19, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28413061/mechanical-behavior-of-bulk-direct-composite-versus-block-composite-and-lithium-disilicate-indirect-class-ii-restorations-by-cad-fem-modeling
#8
Pietro Ausiello, Stefano Ciaramella, Andrea Fabianelli, Antonio Gloria, Massimo Martorelli, Antonio Lanzotti, David C Watts
OBJECTIVES: To study the influence of resin based and lithium disilicate materials on the stress and strain distributions in adhesive class II mesio-occlusal-distal (MOD) restorations using numerical finite element analysis (FEA). To investigate the materials combinations in the restored teeth during mastication and their ability to relieve stresses. METHODS: One 3D model of a sound lower molar and three 3D class II MOD cavity models with 95° cavity-margin-angle shapes were modelled...
April 13, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28385442/restoration-of-a-large-class-iv-fracture-using-direct-composite-resin-a-clinical-report
#9
Mario F Romero, Jamie Austin Grant, Megan Todd
Restoration of anterior tooth fractures is a common dental procedure. Both direct and indirect options are clinically acceptable to repair fractured teeth. For a large class IV fracture, treatment planning is time consuming, and the artistic skills necessary to achieve optimal results can be daunting. This clinical report describes a step-by-step protocol for achieving highly esthetic direct anterior restorations.
April 3, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28376960/periodontal-disease-its-impact-on-restorative-dentistry
#10
Shauna Culshaw
A healthy periodontium provides stable gingival margins and stable tooth position prior to tooth preparations for indirect restorations. Good periodontal health allows easier tissue handling during tooth preparation, impression taking and restoration fitting. Periodontal health is integral to successful restorative care. This report documents common clinical scenarios in which periodontal problems cause aesthetic concern.
February 28, 2017: Primary Dental Journal
https://www.readbyqxmd.com/read/28299855/a-systematic-review-and-meta-analysis-of-the-association-between-poor-oral-health-and-substance-abuse
#11
REVIEW
Hooman Baghaie, Steve Kisely, Malcolm Forbes, Emily Sawyer, Dan J Siskind
BACKGROUND AND AIMS: Substance use disorders are associated commonly with comorbid physical illness. There are fewer data on dental disease in these conditions, in spite of high rates of dry mouth (xerostomia), as well as the associated indirect or life-style effects such as poverty and lack of access to care. We compared the oral health of people with substance use disorders (SUDs) with non-using controls. METHOD: This was a systematic search for studies from the last 35 years of the oral health of people reporting SUDs...
March 16, 2017: Addiction
https://www.readbyqxmd.com/read/28288297/early-rehabilitation-of-incisors-with-dentinogenesis-imperfecta-type-ii-case-report
#12
Ana Paula Ca Beltrame, Maíra Mery Rosa, Ricardo At Noschang, Izabel Cs Almeida
Dentinogenesis imperfecta is an phenotypic alteration in the formation of the organic matrix. It causes the rapid and progressive wear of tooth structure, which may compromise tooth function and aesthetics. This is a case of a 1y, 8m-old child with dentinogenesis imperfecta. All teeth presented with an opalescent appearance and grayish color hue. Compromised structural integrity was noted as excessive wear and fracturing of the enamel from the dentin layer. With low doses of midazolam (oral) and chloral hydrate (rectal) administration, in a hospital environment, sedation was used to aid full mouth rehabilitation...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28252424/the-peculiarities-of-treatment-of-uncomplicated-and-complicated-dental-injuries-caused-by-trauma
#13
M Mamaladze, N Nizharadze, O Vadachkoria
Trauma related injuries of permanent teeth occur frequently and are the most pressing issue the dentists are facing today. In different age groups the same type of trauma affects the teeth with different frequencies. For instance, accident related dental trauma in children and adults affected permanent teeth in 30% and deciduous teeth in 20%, respectively. It should also be noted that front teeth are more susceptible to traumatic injuries compared to the incisors. Upper front teeth were injured in 72% of cases, while lower central, upper lateral incisors, canines and premolars only in 6-8%...
January 2017: Georgian Medical News
https://www.readbyqxmd.com/read/28216846/three-dimensional-finite-element-analysis-of-the-stress-distribution-pattern-in-a-mandibular-first-molar-tooth-restored-with-five-different-restorative-materials
#14
Kathleen Manuela D'souza, Meena Ajay Aras
INTRODUCTION: Badly broken or structurally compromised posterior teeth are frequently associated with crown/root fracture. Numerous restorative materials have been used to fabricate indirect full-coverage restorations for such teeth. This study aims to evaluate and compare the effect of restorative materials on the stress distribution pattern in a mandibular first molar tooth, under varying loading conditions and to compare the stress distribution pattern in five commonly used indirect restorative materials...
January 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/28089332/lithium-silicate-endocrown-fabricated-with-a-cad-cam-system-a-functional-and-esthetic-protocol
#15
Leonardo Fernandes da Cunha, Carla Castiglia Gonzaga, Janes Francio Pissaia, Gisele Maria Correr
An endocrown restoration is an alternative approach to complete crowns with intraradicular cores or dowels for the restoration of endodontically treated teeth. Endocrowns conserve tooth structure and require fewer dental visits. This approach has been widely used, and various materials and techniques have been reported. Computer-aided design and computer-aided manufacturing (CAD-CAM) systems can generate and store libraries of teeth with various anatomies in their database, and diagnostic tooth waxing may not be required...
January 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28057347/sandblasting-may-damage-the-surface-of-composite-cad-cam-blocks
#16
Kumiko Yoshihara, Noriyuki Nagaoka, Yukinori Maruo, Goro Nishigawa, Masao Irie, Yasuhiro Yoshida, Bart Van Meerbeek
OBJECTIVE: CAD-CAM blocks to fabricate semi-direct and indirect restorations are available in different sorts of ceramics as well as composite. In order to bond restorations prepared out of composite blocks into tooth cavities, it is recommended to gently sandblast the surface prior to the application of a primer/adhesive. Today, the effect of sandblasting composite block surfaces has not thoroughly been investigated. In this study, the ultra-structure of composite CAD-CAM blocks was investigated with special attention to the effect of sandblasting on the surface topography and of silanization on the bonding performance...
January 2, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27982233/fracture-strength-of-weakened-anterior-teeth-associated-to-different-reconstructive-techniques
#17
Mariana Carolina de Lara Ferro, Vivian Colucci, Artur Gaiotto Marques, Ricardo Faria Ribeiro, Yara T C Silva-Sousa, Erica Alves Gomes
This study evaluated the fracture strength of endodontically treated teeth submitted to reconstructive techniques through dynamic and static tests. Forty human anterior teeth were divided into 4 groups (n=10): GNW (non-weakened) - root restored with glass fiber post (GFP), GW - weakened root restored with GFP, GDA - weakened root restored with direct anatomic GFP, and GIA - weakened root restored with indirect anatomic GFP. The teeth were endodontically treated considering that experimental groups (GW, GDA and GIA) simulated weakened roots for restoration with GFP using different techniques...
September 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27892837/conservative-anterior-partial-coverage-cad-cam-restoration
#18
J T May
Computer-aided design and manufacturing technology enables practitioners to create, in a single appointment, indirect restorations that are esthetic and functionally unique to the patient's situation. The popular effort to perform minimally invasive dentistry using digital techniques with chairside milling can lead dentists to novel individualized restorative treatment. This article demonstrates a conservative anterior partial coverage restoration, utilizing both digital technology and chairside ceramic characterization to achieve an optimal esthetic outcome while preserving healthy tooth structure...
March 2017: Operative Dentistry
https://www.readbyqxmd.com/read/27890355/the-effects-of-cavity-margin-angles-and-bolus-stiffness-on-the-mechanical-behavior-of-indirect-resin-composite-class-ii-restorations
#19
Pietro Ausiello, Stefano Ciaramella, Franklin Garcia-Godoy, Antonio Gloria, Antonio Lanzotti, Saverio Maietta, Massimo Martorelli
OBJECTIVE: To study the influence of the different class II mesio-occlusal-distal (MOD) cavity shape on the stress and strain distributions in adhesive indirect restorations, using numerical finite element analysis (FEA). To investigate the relationship between restored teeth failure and stiffness of food, three values of Young's modulus were used for the food. METHODS: A 3D model of a sound lower molar and three class II MOD cavities with different shape were created...
November 24, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27875055/intraoral-repair-of-a-glass-ceramic-restoration-with-nanohybrid-ormocers-a-case-report
#20
Juergen Manhart, Iris Frasheri
The interest in repairing failed restorations has been growing; such a procedure may prolong the life span of defective direct and indirect dental restorations. The intraoral repair using resin-based composite materials has major benefits, as it preserves the main body of the restoration, avoids unnecessary removal of sound tooth structure, is an easy and fast treatment, avoids additional appointments, and is inexpensive. This case report demonstrates the use of nanohybrid Ormocer®, or organically modified ceramic, materials...
November 2016: Compendium of Continuing Education in Dentistry
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