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https://www.readbyqxmd.com/read/28526655/digital-morphometrics-a-new-upper-airway-phenotyping-paradigm-in-obstructive-sleep-apnea
#1
Richard J Schwab, Sarah E Leinwand, Cary B Bearn, Greg Maislin, Ramya Bhat Rao, Adithya Nagaraja, Stephen Wang, Brendan T Keenan
BACKGROUND: Obstructive sleep apnea (OSA) is associated with changes in pharyngeal anatomy. The goal of this study was to objectively and reproducibly quantify pharyngeal anatomy using digital morphometrics based on a laser ruler, and to assess differences between apneics and controls and associations with AHI (apnea-hypopnea index). This is the first study to use digital morphometrics to quantify intraoral risk factors for OSA. METHODS: Digital photographs were obtained using an intraoral laser ruler and digital camera in 311 controls (mean AHI=4...
May 16, 2017: Chest
https://www.readbyqxmd.com/read/28450757/selective-removal-of-natural-caries-lesions-from-dentin-and-tooth-occlusal-surfaces-using-a-diode-pumped-er-yag-laser
#2
Jamison Jew, Kenneth H Chan, Cynthia L Darling, Daniel Fried
Selective removal of caries lesions with high precision is best accomplished using lasers operating at high pulse repetition rates utilizing small spot sizes. Conventional flash-lamp pumped Er:YAG lasers are poorly suited for this purpose, but new diode-pumped solid-state (DPSS) Er:YAG lasers have become available operating at high pulse repetition rates. Microradiography was used to determine the mineral content of the demineralized dentin of 200-μm thick sections with natural caries lesions prior to laser ablation...
January 28, 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28438560/longitudinal-investigation-of-salivary-proteomic-profiles-in-the-development-of-early-childhood-caries
#3
Shuang Ao, Xiangyu Sun, Xiangru Shi, Xin Huang, Feng Chen, Shuguo Zheng
OBJECTIVES: To investigate differentially expressed salivary peptides in the development of early childhood caries (ECC) in 3-4 year-old children. MATERIALS AND METHODS: Eighty-two caries-free children at baseline were followed-up for 1year, during which period 15 of them had developed ECC (Group C), whilst another 15 cases out of the 31 individuals who remained healthy were marked as Group H. Stimulated whole saliva samples were collected at 0, 6 and 12 months, and analyzed using weak cation exchange magnetic beads combined with matrix assisted laser desorption/ionization time-of-flight mass spectrometry...
April 22, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28358306/effect-of-the-biofilm-age-and-starvation-on-acid-tolerance-of-biofilm-formed-by-streptococcus-mutans-isolated-from-caries-active-and-caries-free-adults
#4
Shan Jiang, Shuai Chen, Chengfei Zhang, Xingfu Zhao, Xiaojing Huang, Zhiyu Cai
Streptococcus mutans (S. mutans) is considered a leading cause of dental caries. The capability of S. mutans to tolerate low pH is essential for its cariogenicity. Aciduricity of S. mutans is linked to its adaptation to environmental stress in oral cavity. This study aimed to investigate the effect of biofilm age and starvation condition on acid tolerance of biofilm formed by S. mutans clinical isolates. S. mutans clinical strains isolated from caries-active (SM593) and caries-free (SM18) adults and a reference strain (ATCC25175) were used for biofilm formation...
March 30, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28339115/near-ir-and-cp-oct-imaging-of-suspected-occlusal-caries-lesions
#5
Jacob C Simon, Hobin Kang, Michal Staninec, Andrew T Jang, Kenneth H Chan, Cynthia L Darling, Robert C Lee, Daniel Fried
INTRODUCTION: Radiographic methods have poor sensitivity for occlusal lesions and by the time the lesions are radiolucent they have typically progressed deep into the dentin. New more sensitive imaging methods are needed to detect occlusal lesions. In this study, cross-polarization optical coherence tomography (CP-OCT) and near-IR imaging were used to image questionable occlusal lesions (QOC's) that were not visible on radiographs but had been scheduled for restoration on 30 test subjects...
March 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28326713/-observation-and-analysis-of-microstructure-of-dentin-caries-lesions-through-3d-laser-scanning-microscope
#6
Xu Lixia, Xu Hongmei, Zhu Xiaoying, Sun Limei
OBJECTIVE: Microstructural changes in dentin carious lesions were investigated using a 3D laser scanning microscope, which has a morphological theoretical foundation in the further study of clinical caries disease prevention and treatments. METHODS: Six fresh extracted caries molars were prepared into cross-section specimens. The sections were examined by 3D and laser measuring morphology. RESULTS: Zones were identified in the lesions on the basis of their optical appearance...
October 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28322360/the-effect-of-casein-phosphopeptide-amorphous-calcium-phosphate-on-molar-incisor-hypomineralisation-%C3%A2-a-pilot-study
#7
Meltem Bakkal, Zerrin Abbasoglu, Betul Kargul
PURPOSE: To evaluate the effect of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) and casein phosphopeptide-amorphous calcium fluoride phosphate (CPP-ACFP) application on noncarious MIH (molar-incisor hypomineralisation) lesions by using a DIAGNOdent device (KaVo), which measures laser fluorescence within the mineral structure of the tooth. MATERIALS AND METHODS: A total of 461 subjects age 7-12 (mean ± SD was 9.9 ± 1.6) years were examined. Fifty four children were diagnosed with MIH and divided into 2 groups...
March 20, 2017: Oral Health & Preventive Dentistry
https://www.readbyqxmd.com/read/28322359/clinical-evaluation-of-a-fissure-sealant-placed-by-acid-etching-or-er-yag-laser-combined-with-acid-etching
#8
Basak Durmus, Figen Giray, Sertac Peker, Betul Kargul
PURPOSE: To evaluate the efficacy of conventional acid etching alone (acid etching) and Er:YAG laser combined with acid etching (laser + acid etching) on fissure sealant (FS) retention of first permanent molars (FPMs) after 18 months. MATERIALS AND METHODS: Using a split-mouth design in 51 children, a total of 204 FPMs were sealed with acid etching alone or laser plus acid etching (laser+acid). The retention of sealants and occurrence of caries were evaluated at 3, 6, 12, and 18 months...
March 20, 2017: Oral Health & Preventive Dentistry
https://www.readbyqxmd.com/read/28300725/diagnosis-of-occlusal-caries-lesions-in-deciduous-molars-by-coherent-light-scattering-pattern-speckle
#9
Silvia Regina Garcia Olivan, Alessandro Melo Deana, Marcelo Mendes Pinto, Ravana Angelini Sfalcin, Kristianne Porta Santos Fernandes, Raquel Agnelli Mesquita-Ferrari, Renato Araujo Prates, Sandra Kalil Bussadori
BACKGROUND: In this study is presented the correlation between laser speckle images and detection of incipient caries lesions by changing the microstructure of the surface of tooth enamel. METHODS: We used 30 healthy deciduous molar teeth collected from the Biobank Human Teeth, Faculty of Dentistry, University of São Paulo who had carious lesions induced by the pH cycling method. The samples were evaluated for the diagnosis of caries by two METHODS: ICDAS and speckle pattern of coherent light scattering after 5, 10 and 15days and the results were statistically analyzed using α=0...
March 11, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28294198/external-and-internal-resin-infiltration-of-natural-proximal-subsurface-caries-lesions-a-valuable-enhancement-of-the-internal-tunnel-restoration
#10
Andrej M Kielbassa, Ina Ulrich, Vanessa D Werth, Christoph Schüller, Wilhelm Frank, Rita Schmidl
OBJECTIVE: The aim of this ex-vivo study was to evaluate both the external and the internal penetration ability of a resin infiltrant into natural proximal and macroscopically intact white spot lesions, and to merge this approach with the internal tunnel preparation concept. METHOD AND MATERIALS: 20 premolars and 20 molars with proximal subsurface lesions (ICDAS, code 2) and respective radiographic lesion depths extending into the middle third of dentin (D2 lesions) were selected and divided into two groups...
March 14, 2017: Quintessence International
https://www.readbyqxmd.com/read/28280743/nicotine-enhances-interspecies-relationship-between-streptococcus-mutans-and-candida-albicans
#11
Shiyu Liu, Wei Qiu, Keke Zhang, Xuedong Zhou, Biao Ren, Jinzhi He, Xin Xu, Lei Cheng, Mingyun Li
Streptococcus mutans and Candida albicans are common microorganisms in the human oral cavity. The synergistic relationship between these two species has been deeply explored in many studies. In the present study, the effect of alkaloid nicotine on the interspecies between S. mutans and C. albicans is explored. We developed a dual-species biofilm model and studied biofilm biomass, biofilm structure, synthesis of extracellular polysaccharides (EPS), and expression of glucosyltransferases (Gtfs). Biofilm formation and bacterial and fungal cell numbers in dual-species biofilms increased in the presence of nicotine...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28208995/a-comparative-analysis-of-caries-inhibitory-effect-of-remineralizing-agents-on-human-enamel-treated-with-er-yag-laser-an-in-vitro-atomic-emission-spectrometry-analysis
#12
Aswin Saseendran Nair, R Krishna Kumar, Sunil Thomas Philip, Syed Shaheed Ahameed, Sairaj Punnathara, Joby Peter
INTRODUCTION: The tug of war to maintain tooth integrity is dependent on a ratio between demineralization and remineralization. Hence, demineralization should be retarded and remineralization should be enhanced to maintain a natural equilibrium in the oral cavity. AIM: To compare in-vitro acid resistance of human enamel when using Casein Phosphopeptides Amorphous Calcium Phosphate (CPP-ACP) [GC Tooth mousse] cream, Casein Phosphopeptide Amorphous Calcium Fluoride Phosphate (CPP-ACFP) [GC Tooth mousse plus] cream, Er:YAG laser alone, combination of CPP-ACP with Er:YAG laser, CPP-ACFP with Er:YAG laser...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28194533/the-diagnostic-accuracy-of-a-laser-fluorescence-device-and-digital-radiography-in-detecting-approximal-caries-lesions-in-posterior-permanent-teeth-an-in-vivo-study
#13
R Menem, I Barngkgei, N Beiruti, I Al Haffar, Easter Joury
The aim of this in vivo study was to test the diagnostic accuracy of a pen-type laser fluorescence (LFpen) device in detecting approximal caries lesions, in posterior permanent teeth, at the cavitation and non-cavitation thresholds, and compare it with that of digital bitewing radiography. Thirty patients (aged 18-37), who attended the Faculty of Dentistry at Damascus University for a dental examination, were consecutively screened. Ninety approximal surfaces of posterior permanent teeth without frank cavitations, enamel hypoplasia or restorations were selected and examined using the LFpen (DIAGNOdent pen) and digital bitewing radiography...
April 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28183611/synergistic-effects-of-proanthocyanidin-tri-calcium-phosphate-and-fluoride-on-artificial-root-caries-and-dentine-collagen
#14
Don Jeevanie Epasinghe, Stephen Kwan, Dora Chu, May Mei Lei, Michael Frances Burrow, Cynthia Kar Yung Yiu
BACKGROUND: Proanthocyanidin has been shown to enhance dentine collagen stability and remineralization of artificial root caries. OBJECTIVES: To evaluate the effect of proanthocyanidin (PA) in combination with tri-calcium phosphate (TCP) and fluoride (F) on resistance to collagen degradation and remineralization of artificial caries lesions. METHODS: Demineralized root fragments (n=75) were randomly divided into five groups based on treatments: (i) 6...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28157423/effect-of-nd-yag-and-co2-laser-irradiation-on-prevention-of-enamel-demineralization-in-orthodontics-in-vitro-study
#15
Renato Siva Paulos, Priscila Yumi Seino, Karen Akemi Fukushima, Marcia Martins Marques, Fernanda Campos Sousa de Almeida, Karen Muller Ramalho, Patricia Moreira de Freitas, Aldo Brugnera, Maria Stella Moreira
OBJECTIVE: The aim of this study was to investigate Nd:YAG and CO2 laser effects in the prevention of demineralization in deeper layers of enamel via successive acid challenge cycles. BACKGROUND DATA: Lasers are promising in the prevention of enamel demineralization around the orthodontic brackets; however, there are very few studies that evaluate if the effects of treatment could be extended after successive acid challenge cycles due to permanent enamel structural alterations...
May 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28132137/influence-of-irradiation-by-a-novel-co2-9-3-%C3%AE-m-short-pulsed-laser-on-sealant-bond-strength
#16
P Rechmann, K Sherathiya, R Kinsel, R Vaderhobli, B M T Rechmann
The objective of this in vitro study was to evaluate whether irradiation of enamel with a novel CO2 9.3-μm short-pulsed laser using energies that enhance caries resistance influences the shear bond strength of composite resin sealants to the irradiated enamel. Seventy bovine and 240 human enamel samples were irradiated with a 9.3-μm carbon dioxide laser (Solea, Convergent Dental, Inc., Natick, MA) with four different laser energies known to enhance caries resistance or ablate enamel (pulse duration from 3 μs at 1...
April 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28111390/evaluation-of-resin-infiltration-on-demineralized-root-surface-an-in-vitro-study
#17
Yuan Zhou, Khairul Matin, Yasushi Shimada, Yasunori Sumi, Junji Tagami
The aim of this study was to evaluate the effect of resin infiltration on root caries induced by Streptococcus mutans biofilms. Human premolar specimens were divided to 5 groups: negative control (NC), Clearfil SE Bond (SEB), Icon-etch120s+Icon-infiltrant (HA120), Icon-etch10s+Icon-infiltrant (HA10) and K-etchant10s+Icon-infiltrant (PA10). The resin penetration was observed by fluorescent microscope. Biofilm-induced demineralization was conducted again and observed by swept-source optical coherence tomography and confocal laser scanning microscope...
March 31, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28101736/diagnostic-validity-of-icdas-and-diagnodent-combined-an-in-vitro-study-in-pre-cavitated-lesions
#18
José Enrique Iranzo-Cortés, Sofija Terzic, José María Montiel-Company, José Manuel Almerich-Silla
In a continuous process such as caries, it is important to possess criteria or instruments that allow the lesions to be diagnosed at early stages so that preventive or interceptive treatments can be applied before cavitation takes place. The present study seeks to assess the diagnostic efficacy of the International Caries Detection and Assessment System (ICDAS II) criteria and the DIAGNOdent laser fluorescence (LF) pen in occlusal caries lesions, using histological sections as the gold standard. Sixty-four permanent teeth were examined by two researchers who previously performed and calibrated both the ICDAS II criteria and the use of DIAGNOdent pen...
April 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28099873/antimicrobial-photodynamic-therapy-as-an-adjunct-for-treatment-of-deep-carious-lesions-a-systematic-review
#19
REVIEW
Fabian Cieplik, Wolfgang Buchalla, Elmar Hellwig, Ali Al-Ahmad, Karl-Anton Hiller, Tim Maisch, Lamprini Karygianni
For deep carious lesions, a more conservative treatment modality ("selective caries removal") has been proposed, where only the heavily contaminated dentine is removed. In this regard, effective adjuncts for cavity disinfection such as the antimicrobial photodynamic therapy (aPDT) can be valuable clinically prior to definitive restoration. Therefore, the aim of this study was to systematically assess clinical studies on the effectiveness of aPDT as a supplementary tool in the treatment of deep caries lesions...
January 15, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28076292/445-nm-diode-laser-assisted-debonding-of-self-ligating-ceramic-brackets
#20
Steffen Stein, Alexander Kleye, Michael Schauseil, Andreas Hellak, Heike Korbmacher-Steiner, Andreas Braun
OBJECTIVES: This study determined the influence of irradiation on aesthetic ceramic brackets with a novel 445-nm diode laser prior to debonding on the bracket failure mode. MATERIALS AND METHODS: Thirty ceramic brackets (In-Ovation® C, GAC) were standard-bonded to the oral and buccal planed and polished enamel surfaces of 15 caries-free human 3rd molars. Prior to study-blinded debonding, the brackets in the laser group were irradiated with the diode laser (SIROLaser Blue®, Sirona), while the irradiation was simulated within the conventional group...
January 11, 2017: Biomedizinische Technik. Biomedical Engineering
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