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https://www.readbyqxmd.com/read/28088226/use-of-an-intraoperative-navigation-system-for-retrieving-a-broken-dental-instrument-in-the-mandible-a-case-report
#1
Shintaro Sukegawa, Takahiro Kanno, Akane Shibata, Kenichi Matsumoto, Yuka Sukegawa-Takahashi, Kyosuke Sakaida, Yoshihiko Furuki
BACKGROUND: A fracture of root canal instruments, with a fractured piece protruding beyond the apex, is a troublesome incident during an endodontic treatment. Locating and retrieving them represents a challenge to maxillofacial surgeons because it is difficult to access due to the proximity between the foreign body and vital structures. Although safe and accurate for surgery, radiographs and electromagnetic devices do not provide a precise three-dimensional position. In contrast, computer-aided navigation provides a correlation between preoperatively collected data and intraoperatively encountered anatomy...
January 15, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28068269/chitosan-incorporated-in-a-total-etch-adhesive-system-antimicrobial-activity-against-streptococcus-mutans-and-lactobacillus-casei
#2
Marcelo Figueiredo Lobato, Cecilia Pedroso Turssi, Flávia Lucisano Botelho do Amaral, Fabiana Mantovani Gomes França, Roberta Tarkany Basting
The aim of this study was to investigate the antimicrobial effect of an experimental adhesive system containing chitosan (0.2% and 0.5%) against Streptococcus mutans and Lactobacillus casei. Twenty-four extracted human third molars were used, and 4 cavities were prepared in each tooth. The teeth were contaminated with either S mutans (n = 12 teeth, 48 cavities) or L casei (n = 12 teeth, 48 cavities) microorganisms. One cavity in each tooth received 1 of the following treatments: negative control (no treatment [NC]), positive control (Adper Single Bond 2 [SB]), an experimental adhesive containing chitosan 0...
January 2017: General Dentistry
https://www.readbyqxmd.com/read/28063316/salivary-bisphenol-a-levels-and-their-association-with-composite-resin-restoration
#3
Jung-Ha Lee, Seung-Kyoo Yi, Se-Yeon Kim, Ji-Soo Kim, Sung-Ae Son, Seung-Hwa Jeong, Jin-Bom Kim
Composite resin has been increasingly used in an effort to remove minimal amount of tooth structure and are used for restoring not just carious cavities but also cervical abrasion. To synthesize composite resin, bisphenol A (BPA) is used. The aim of the study was to measure the changes in salivary BPA level related with composite resin restoration. ELISA was used to examine the BPA levels in the saliva collected from 30 volunteers whose teeth were filled with composite resin. Salivary samples were collected immediately before filling and 5 min and 7 d after filling...
December 27, 2016: Chemosphere
https://www.readbyqxmd.com/read/28059315/impact-of-resonant-dispersion-on-the-sensitivity-of-intracavity-phase-interferometry-and-laser-gyros
#4
James Hendrie, Matthias Lenzner, Hanieh Afkhamiardakani, Jean Claude Diels, Ladan Arissian
Intracavity phase interferometry is a phase sensing technique using mode-locked lasers in which two intracavity pulses circulate. The beat frequency between the two output frequency combs is proportional to a phase shift to be measured. A laser gyro is a particular implementation of this device. The demonstrated sensitivity of 10<sup>-8</sup> of these devices could be manipulated by applying a giant dispersion to each tooth of the comb. It is shown that the resonant dispersion of a Fabry-Perot inserted in the cavity couples to the modes of the frequency comb, resulting in a large change in phase response...
December 26, 2016: Optics Express
https://www.readbyqxmd.com/read/28058601/the-first-finding-of-a-rhinoceros-of-the-genus-stephanorhinus-in-arctic-asia
#5
I V Kirillova, O F Chernova, V V Kukarskikh, F K Shidlovskiy, O G Zanina
The first skull of a rhinoceros of the genus Stephanorhinus has been found above the Arctic Circle on the middle Chondon River (Yakutia, Russia). This is the northernmost finding that extends significantly the genus range and provides additional information about the diet and environment of a genus representative. Plant remnants from the maxillary tooth cavities were identified as belonging to trees (Larix, Betula), shrubs (Ericaceae), mosses (Aulacomnium sp., Polytrichum sp.), herbs (Dicotyledones) and grasses (Poaceae), but not to sedges (Cyperaceae)...
November 2016: Doklady Biological Sciences: Proceedings of the Academy of Sciences of the USSR, Biological Sciences Sections
https://www.readbyqxmd.com/read/28057347/sandblasting-may-damage-the-surface-of-composite-cad-cam-blocks
#6
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/28043846/micro-filled-resin-infiltration-of-fissure-caries-lesions-in-vitro
#7
J Lausch, H Askar, S Paris, H Meyer-Lueckel
OBJECTIVES: The aim of this in vitro study was to evaluate three treatment modalities [infiltrant resin (IR), micro-filled infiltrant resin (MFIR), infiltrant-sealant-combination (ISC)] regarding both their abilities to penetrate lesions differing in ICDAS-codes and to fill fissures and cavities. MATERIALS AND METHODS: Extracted human molars (n=90) showing fissure caries lesions with and without cavitations were etched with 15% hydrochloric acid (HCl) that was mixed with abrasives and a 15% HCl-solution (1:1)...
December 30, 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/28042280/advancements-in-all-ceramics-for-dental-restorations-and-their-effect-on-the-wear-of-opposing-dentition
#8
REVIEW
Haroon Rashid, Zeeshan Sheikh, Syed Misbahuddin, Murtaza Raza Kazmi, Sameer Qureshi, Muhammad Zuhaib Uddin
Tooth wear is a process that is usually a result of tooth to tooth and/or tooth and restoration contact. The process of wear essentially becomes accelerated by the introduction of restorations inside the oral cavity, especially in case of opposing ceramic restorations. The newest materials have vastly contributed toward the interest in esthetic dental restorations and have been extensively studied in laboratories. However, despite the recent technological advancements, there has not been a valid in vivo method of evaluation involving clinical wear caused due to ceramics upon restored teeth and natural dentition...
October 2016: European Journal of Dentistry
https://www.readbyqxmd.com/read/28013437/exploration-of-bacterial-species-associated-with-the-salivary-microbiome-of-individuals-with-a-low-susceptibility-to-dental-caries
#9
Haruna Yasunaga, Toru Takeshita, Yukie Shibata, Michiko Furuta, Yoshihiro Shimazaki, Sumio Akifusa, Toshiharu Ninomiya, Yutaka Kiyohara, Ichiro Takahashi, Yoshihisa Yamashita
OBJECTIVE: Dental caries is caused by acidogenic plaque microbiota formed on saliva-bathed tooth surfaces, in which multiple organisms act collectively to initiate and expand a cavity. We explored bacterial species associated with the salivary microbiome of individuals with low susceptibility to dental caries. MATERIALS AND METHODS: The bacterial composition of saliva from 19 young adults was analyzed using barcoded pyrosequencing of the 16S rRNA gene; we compared 10 caries-experienced (CE) and nine caries-free (CF) individuals...
December 24, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28011975/dental-worm-disease
#10
Sergio Sabbatani, Sirio Fiorino
During human evolution, the period in which groups of humans stopped harvesting fruits and seeds growing wild and introduced the cultivation of cereals as well as the domestication of animals represents a very important event. This circumstance had a considerable impact on human pathocenosis, increasing the risk of infectious diseases of animal origin. The aim of this review was to summarise the archaeological and palaeo-pathological evidence in the literature concerning this topic. Starting from early prehistory (about 1...
1, 2016: Le Infezioni in Medicina
https://www.readbyqxmd.com/read/27981270/retrospective-evaluation-of-posterior-composite-%C3%A2-resin-sandwich-restorations-with-herculite-xrv-%C3%A2-18-year-findings
#11
Víctor Alonso, Iria L Darriba, Martín Caserío
OBJECTIVE: The aim of this retrospective study was to evaluate the long-term clinical outcomes of posterior composite resin sandwich restorations, and secondarily to assess the influence of potential factors on survival and causes of failure. METHOD AND MATERIALS: Two hundred and four posterior Herculite XRV restorations due to primary caries performed between 1991 and 1997 were included. The restorations were assessed after 18 years, by two calibrated examiners, according to USPHS criteria...
December 15, 2016: Quintessence International
https://www.readbyqxmd.com/read/27977843/occult-perforating-globe-injury-caused-by-intraocular-foreign-body
#12
Yoshihiro Yonekawa, Cynthia X Qian, Avni V Patel, Leo A Kim, Dean Eliott
Intraocular foreign bodies (IOFBs) may be associated with occult exit wounds. The authors present a case of a man who sustained a zipper-tooth IOFB through the cornea from a car tire explosion. CT showed an IOFB within the vitreous cavity, but the IOFB was not identified during vitrectomy. Extension of the peritomy revealed an exit wound with the foreign body lodged in the extraocular space. This case demonstrates that IOFBs can rest within the vitreous cavity after creating an exit wound, but may escape detection by being driven back out of the globe during vitrectomy due to the pressurized eye...
December 1, 2016: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/27965495/use-of-the-tooth-coronal-pulp-index-for-recognition-of-the-pubertal-growth-period
#13
Fehmieh R Nawaya, Ahmad S Burhan
AIM: The present study aimed to investigate the association between the tooth coronal index (TCI) and the pubertal growth stages (PGS) for children and adolescents. MATERIALS AND METHODS: A cross-sectional study was performed using retrospectively collected panoramic and hand-wrist radiographs of 262 individuals (125 males, 137 females). The coronal height (CH) and the coronal pulp cavity height (CPCH) of the left mandibular teeth were measured. Then the TCI for which was calculated according to Ikeda et al (1985)...
November 1, 2016: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/27942548/effect-of-self-etch-adhesives-on-self-sealing-ability-of-high-copper-amalgams
#14
Saied Mostafa Moazzami, Horieh Moosavi, Maryam Moddaber, Reza Parvizi, Mohamad Hadi Moayed, Nima Mokhber, Michael Meharry, Reza B Kazemi
STATEMENT OF THE PROBLEM: Similar to conventional amalgam, high-copper amalgam alloy may also undergo corrosion, but it takes longer time for the resulting products to reduce microleakage by sealing the micro-gap at the tooth/amalgam interface. PURPOSE: The aim of this study was to evaluate the effect of self-etch adhesives with different pH levels on the interfacial corrosion behavior of high-copper amalgam restoration and its induction potential for self-sealing ability of the micro-gap in the early hours after setting by means of Electro-Chemical Tests (ECTs)...
December 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/27939731/association-of-unfinished-root-canal-treatments-with-the-risk-of-pneumonia-hospitalization
#15
Po-Yen Lin, Yu-Chih Chiang, Yu-Ju Chou, Hong-Ji Chang, Lin-Yang Chi
INTRODUCTION: The objective of root canal treatments (RCTs) is to control pulpal diseases and salvage infected teeth by eradicating microorganisms within the root canal system. However, an unfinished RCT can leave a space for bacterial accumulation, which can leak into the oral cavity and then aspirate into the lower respiratory tract and the lungs, causing infection. This study investigated the association of unfinished RCTs with the possible risk of pneumonia hospitalization using a nationwide population-based database...
January 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/27930461/odontogenic-orofacial-infections
#16
Dario Bertossi, Antonio Barone, Antonio Iurlaro, Simone Marconcini, Daniele De Santis, Marco Finotti, Pasquale Procacci
Acute dental abscess is a frequent and sometimes underestimated disease of the oral cavity. The acute dental abscess usually occurs secondary to caries, trauma, or failed endodontic treatment. After the intact pulp chamber is opened, colonization of the root canals takes place with a variable set of anaerobic bacteria, which colonize the walls of the necrotic root canals forming a specialized mixed anaerobic biofilm. Asymptomatic necrosis is common. However, abscess formation occurs when these bacteria and their toxic products breach into the periapical tissues through the apical foramen and induce acute inflammation and pus formation...
December 7, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27925387/microcomputed-tomography-evaluation-of-volumetric-shrinkage-of-bulk-fill-composites-in-class-ii-cavities
#17
Hamad Algamaiah, Camila S Sampaio, Lindiane C Rigo, Malvin N Janal, Marcelo Giannini, Estevam A Bonfante, Paulo G Coelho, Andre F Reis, Ronaldo Hirata
PURPOSE: This study aimed to quantify polymerization shrinkage of one conventional and three bulk-fill composites, under bonded and unbonded conditions, in Class II preparations using 3D microcomputed tomography (μCT) and report its location. MATERIALS AND METHODS: Preparations (2.5 mm occlusal depth × 4 mm wide × 4 mm mesial box and 1 mm beyond the CEJ distal box depth) were made in 48 human extracted molars (n = 6). Four composites were tested, one regular (Vitalescence/VIT) and three bulk-fill: SureFil SDR Flow (SDR), Tetric EvoCeram Bulk Fill (TET), and Filtek flowable Bulk Fill (FIL)...
December 7, 2016: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/27924596/methods-to-study-antagonistic-activities-among-oral-bacteria
#18
Fengxia Qi, Jens Kreth
Most bacteria in nature exist in multispecies communities known as biofilms. In the natural habitat where resources (nutrient, space, etc.) are usually limited, individual species must compete or collaborate with other neighboring species in order to perpetuate in the multispecies community. The human oral cavity is colonized by >700 microbial species known as the indigenous microbiota. This indigenous flora normally maintains an ecological balance through antagonistic as well as mutualistic interspecies interactions...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27918745/simple-and-aneurysmal-bone-cyst-aspects-of-jaw-pseudocysts-based-on-an-experience-of-brazilian-pathology-service-during-53-years
#19
I-L Flores, M-E Hamilton, EdeF Zanchin-Baldissera, A-C Uchoa-Vasconcelos, S-B Chaves-Tarquinio, A-P Neutzling-Gomes
BACKGROUND: Jaw pseudocysts are benign osseous lesions of unclear etiology. Among these, the simple bone cyst (SBC) and aneurysmal bone cyst (ABC) are intriguing bone pathologies still rarely studied together. This retrospective study aimed to present the long-term case series of patients with jaw pseudocysts focusing on the clinical, radiographic, and transoperative aspects. MATERIAL AND METHODS: A retrospective case series of patients with SBC and ABC was performed...
January 1, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/27895878/evaluation-of-visibility-of-foreign-bodies-in-the-maxillofacial-region-comparison-of-computed-tomography-cone-beam-computed-tomography-ultrasound-and-magnetic-resonance-imaging
#20
Solmaz Valizadeh, Hamidreza Pouraliakbar, Leila Kiani, Yaser Safi, Leila Alibakhshi
BACKGROUND: Detection of foreign bodies (FBs) is challenging. Selection of a fast and affordable imaging modality to locate the FB with minimal patient radiation dose is imperative. OBJECTIVES: This study sought to compare four commonly used imaging modalities namely cone beam computed tomography (CBCT), magnetic resonance imaging (MRI), computed tomography (CT), and ultrasound (US) for detection of FBs in the head and neck region. MATERIALS AND METHODS: In this in vitro study, iron, glass, stone, wood, asphalt, and tooth samples measuring 0...
October 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
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