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https://www.readbyqxmd.com/read/28920187/sub-ablative-er-cr-ysgg-laser-irradiation-under-all-ceramic-restorations-effects-on-demineralization-and-shear-bond-strength
#1
Serdar Bağlar
This study evaluated the caries resistant effects of sub-ablative Er,Cr:YSGG laser irradiation alone and combined with fluoride in comparison with fluoride application alone on enamel prepared for veneer restorations. And also, evaluated these treatments' effects on the shear bond strength of all-ceramic veneer restorations. One hundred and thirty-five human maxillary central teeth were assigned to groups of 1a-control, 1b-laser treated, 1c-fluoride treated, 1d-laser + fluoride treated for shear bond testing and to groups of 2a-positive control(non-demineralised), 2b-laser treated, 2c-fluoride treated, 2d-laser + fluoride treated, 2e-negative control (demineralised) for microhardness testing (n = 15, N = 135)...
September 17, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28914241/validation-of-different-diagnostic-aids-in-detection-of-occlusal-caries-in-primary-molars-an-in-vitro-study
#2
G Shwetha, Prakash Chandra, Latha Anandakrishna, G Dhananjaya, Ashmitha K Shetty, Punitha S Kamath
AIM AND OBJECTIVE: To estimate the accuracy and assess the sensitivity and specificity of direct visual examination (DVE), computerized radiograph (VISTA SCAN mini), and DIAGNOdent (DD) for caries diagnosis in primary molars as compared to histological examination of the teeth. MATERIALS AND METHODS: An in vitro comparative study was carried out on 40 freshly extracted primary molars with questionable pit and fissures that yielded 89 examination sites. These samples were mounted on plaster and were subjected to examination methods for caries detection on the occlusal surface by two trained and calibrated examiners...
October 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/28902250/effect-of-cpp-acp-paste-with-and-without-co2-laser-irradiation-on-demineralized-enamel-microhardness-and-bracket-shear-bond-strength
#3
Nasrin Farhadian, Loghman Rezaei-Soufi, Seyed Farzad Jamalian, Maryam Farhadian, Shahrzad Tamasoki, Milad Malekshoar, Bahareh Javanshir
Introduction: Many patients seeking orthodontic treatment already have incipient enamel lesions and should be placed under preventive treatments. The aim of this in vitro study was to evaluate the effect of CPP-ACP paste and CO2 laser irradiation on demineralized enamel microhardness and shear bond strength of orthodontic brackets. Methods: Eighty caries-free human premolars were subjected to a demineralization challenge using Streptococcus mutans. After demineralization, the samples were randomly divided into five equal experimental groups: Group 1 (control), the brackets were bonded without any surface treatment; Group 2, the enamel surfaces were treated with CPP-ACP paste for 4 minutes before bonding; Group 3, the teeth were irradiated with CO2 laser beams at a wavelength of 10...
July 2017: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/28898513/characterisation-of-a-sucrose-independent-in-vitro-biofilm-model-of-supragingival-plaque
#4
Kota Tsutsumi, Masato Maruyama, Akira Uchiyama, Ken-Ichiro Shibasaki
OBJECTIVES: Sugar consumption has been decreasing in Japan, suggesting higher rates of sucrose-independent supragingival plaque formation. For developing an in vitro biofilm model of sucrose-independent supragingival plaque, this study aimed to investigate the compositions and functions on contributing to cariogenicity in comparison with sucrose-dependent biofilm. MATERIALS AND METHODS: An in vitro multispecies biofilm containing Actinomyces naeslundii, Streptococcus gordonii, S...
September 12, 2017: Oral Diseases
https://www.readbyqxmd.com/read/28894348/laser-driven-calorimetry-of-single-component-liquid-hydrocarbons
#5
Cary Presser, Ashot Nazarian
A novel laser-heating technique, referred to as the laser-driven thermal reactor (LDTR), was used to determine sample thermal (exothermic/endothermic) behavior, specific heat release rate, and total specific heat release of three volatile single-component liquid hydrocarbons, i.e., n-decane, n-butylcyclohexane and n-butylbenzene. The objective was to demonstrate measurement repeatability and extend the LDTR model from earlier investigations. The experimental apparatus consists of a copper sphere-shaped reactor mounted within a vacuum chamber, with sample and substrate supported on a thermocouple near the center of the reactor...
July 2017: Energy & Fuels: An American Chemical Society Journal
https://www.readbyqxmd.com/read/28892645/self-assembling-peptide-p11-4-and-fluoride-for-regenerating-enamel
#6
M Alkilzy, A Tarabaih, R M Santamaria, C H Splieth
Regenerative medicine-based approaches for caries treatment focus on biomimetic remineralization of initial carious lesions as a minimal invasive therapy. In vitro, self-assembling peptide P11-4 enhances remineralization of early carious lesions. To investigate the safety and clinical efficacy of P11-4 for treatment of initial caries, a randomized controlled single-blind study was conducted on children aged >5 y with visible active early caries on erupting permanent molars. Subjects were randomized to either the test group (P11-4 + fluoride varnish) or control group (fluoride varnish alone)...
September 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28877284/caries-progression-in-non-cavitated-fissures-after-infiltrant-application-a-3-year-follow-up-of-a-randomized-controlled-clinical-trial
#7
Camillo Anauate-Netto, Laurindo Borelli, Ricardo Amore, Vinicius DI Hipólito, Paulo Henrique Perlatti D'Alpino
Objectives: To evaluate the efficacy of a conservative treatment to prevent the progression of caries using an infiltrant on non-cavitated pit and fissures. Material and Methods: This controlled clinical trial selected 23 volunteers with clinically and radiographically non-cavitated occlusal caries among patients presenting a "rather low" to "very high" caries risk. Eighty-six teeth were randomly divided into two experimental groups: teeth receiving a commercial pit-and-fissure sealant (Alpha Seal-DFL) and contralateral teeth receiving Icon infiltrant (DMG)...
July 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28839410/effect-of-desensitization-using-bioactive-glass-hydroxyapatite-and-diode-laser-on-the-shear-bond-strength-of-resin-composites-measured-at-different-time-intervals-an-in-vitro-study
#8
Timsi Gupta, Shruthi Nagaraja, Sylvia Mathew, Indiresha H Narayana, K S Madhu, K Dinesh
BACKGROUND: Dentin desensitizers may change the properties of smear layer and have adverse effects on the bonding performance of adhesive systems. AIM: The aim of this study was to compare the effect of bioactive glass (BG), hydroxyapatite, and diode laser desensitization on shear bond strength of resin composites to dentin at different time intervals. MATERIALS AND METHODS: Seventy-two caries-free maxillary premolars were selected. Buccal surfaces were flattened to expose dentin...
April 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/28812169/bond-strength-of-etch-and-rinse-and-self-etch-adhesive-systems-to-enamel-and-dentin-irradiated-with-a-novel-co2-9-3%C3%A2-%C3%AE-m-short-pulsed-laser-for-dental-restorative-procedures
#9
Peter Rechmann, N Bartolome, R Kinsel, R Vaderhobli, B M T Rechmann
The objective of this study was to evaluate the influence of CO2 9.3 μm short-pulsed laser irradiation on the shear bond strength of composite resin to enamel and dentin. Two hundred enamel and 210 dentin samples were irradiated with a 9.3 µm carbon dioxide laser (Solea, Convergent Dental, Inc., Natick, MA) with energies which either enhanced caries resistance or were effective for ablation. OptiBond Solo Plus [OptiBondTE] (Kerr Corporation, Orange, CA) and Peak Universal Bond light-cured adhesive [PeakTE] (Ultradent Products, South Jordan, UT) were used...
August 15, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28809925/salivary-peptidome-profiling-analysis-for-occurrence-of-new-carious-lesions-in-patients-with-severe-early-childhood-caries
#10
Chang Tian, Xiangyu Sun, Xiaochen Liu, Xin Huang, Feng Chen, Shuguo Zheng
This study aimed to identify differences of peptide profiles in stimulated whole saliva among children with and without occurrence of new carious lesions, and to provide a simple way for early diagnosis and prevention of the relapse of severe early childhood caries (s-ECC). Overall, 26 children aged 3-4 years were selected out from all the children in the kindergarten to be involved in the present study, among them 13 were diagnosed as s-ECC and underwent dental treatment, whilst the other 13 were matched by age and sex as control...
2017: PloS One
https://www.readbyqxmd.com/read/28808205/farnesol-inhibits-development-of-caries-by-augmenting-oxygen-sensitivity-and-suppressing-virulence-associated-gene-expression-instreptococcus-mutans
#11
Li Cao, Zhen-Zhen Zhang, Shuang-Bo Xu, Ming Ma, Xin Wei
Streptococcus mutans is a primary etiological agent of dental caries. Farnesol, as a potential antimicrobial agent, inhibits the development ofS. mutans biofilm. In this study, we hypothesized that farnesol inhibits caries development in vitro and interferes with biofilm formation by regulating virulence-associated gene expression. The inhibitory effects of farnesol to S. mutans biofilms on enamel surfaces were investigated by determining micro-hardness and calcium measurements. Additionally, the morphological changes ofS...
July 13, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/28783550/characterization-of-the-clustered-regularly-interspaced-short-palindromic-repeats-sites-in-streptococcus-mutans-isolated-from-early-childhood-caries-patients
#12
Jing Chen, Tiancheng Li, Xuedong Zhou, Lei Cheng, Yuanyuan Huo, Jing Zou, Yuqing Li
OBJECTIVE: The aim of this study was to analyze the characteristics of the clustered regularly interspaced short palindromic repeats (CRISPR) sites in 45 clinical Streptococcus mutans strains and their relationship to the clinical manifestations of early childhood caries (ECC). METHODS: Forty-five S. mutans strains were isolated from the plaque samples taken from sixty-three children. CRISPR sites were sequenced and BLAST was used to compare these sites to those in the CRISPRTarget database...
July 29, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28762194/selective-removal-of-carious-lesion-with-er-yag-laser-followed-by-dentin-biomodification-with-chitosan
#13
Fabiana A Curylofo-Zotti, Gabriela Solano Tanta, Miriane Lucindo Zucoloto, Aline E Souza-Gabriel, Silmara A M Corona
The aim of this study was to evaluate the effect of Er:YAG laser for selective removal of carious lesion, followed by biomodification with chitosan gel where the subsurface microhardness, chemical composition, and morphological changes of the residual caries-affected dentin were examined. Artificial dentinal lesions were created by pH-cycling method (14 days) in 104 bovine specimens (5 × 5 mm). Specimens were randomly divided according to the carious removal method: bur (low-speed handpiece) or Er:YAG laser (250 mJ/4 Hz)...
August 1, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28703572/development-of-epigallocatechin-3-gallate-encapsulated-nanohydroxyapatite-mesoporous-silica-for-therapeutic-management-of-dentin-surface
#14
Jian Yu, Hongye Yang, Kang Li, Hongyu Ren, Jinmei Lei, Cui Huang
In dental clinic, unsatisfactory management of the dentin surface after dentin exposure often leads to the occurrence of dentin hypersensitivity and caries. Current approaches can occlude the tubules on the dentin surface to relieve dentin hypersensitivity; however, the blocked tubules are generally weak in combating daily tooth erosion and abrasion. Moreover, cariogenic bacteria, such as Streptococcus mutans, produce biofilm on the dentin surface, causing caries and compromising the tubules' sealing efficacy...
August 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28690360/absorption-transmission-measurements-of-psap-particle-laden-filters-from-the-biomass-burning-observation-project-bbop-field-campaign
#15
Cary Presser, Ashot Nazarian, Joseph M Conny, Duli Chand, Arthur Sedlacek, John M Hubbe
Absorptivity measurements with a laser-heating approach, referred to as the laser-driven thermal reactor (LDTR), were carried out in the infrared and applied at ambient (laboratory) non-reacting conditions to particle-laden filters from a three-wavelength (visible) particle/soot absorption photometer (PSAP). The particles were obtained during the Biomass Burning Observation Project (BBOP) field campaign. The focus of this study was to determine the particle absorption coefficient from field-campaign filter samples using the LDTR approach, and compare results with other commercially available instrumentation (in this case with the PSAP, which has been compared with numerous other optical techniques)...
2017: Aerosol Science and Technology: the Journal of the American Association for Aerosol Research
https://www.readbyqxmd.com/read/28669068/evaluation-of-laser-fluorescence-in-monitoring-non-cavitated-caries-lesion-progression-on-smooth-surfaces-in-vitro
#16
J A Rodrigues, C S Sarti, C M Assunção, R A Arthur, A Lussi, M B Diniz
The aim of this study was to evaluate the performance of a pen-type laser fluorescence (LF) device (LFpen: DIAGNOdent pen) to detect and monitor the progression of caries-like lesions on smooth surfaces. Fifty-two bovine enamel blocks were submitted to three different demineralisation cycles for caries-like lesion induction using Streptococcus mutans, Lactobacillus casei and Actinomyces naeslundii. At baseline and after each cycle, the enamel blocks were analysed under Knoop surface micro-hardness (SMH) and an LFpen...
July 2, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28668766/effect-of-arginine-on-the-growth-and-biofilm-formation-of-oral-bacteria
#17
Xuelian Huang, Keke Zhang, Meng Deng, Robertus A M Exterkate, Chengcheng Liu, Xuedong Zhou, Lei Cheng, Jacob M Ten Cate
BACKGROUND: Alkali production via arginine deiminase system (ADS) of oral bacteria plays a significant role in oral ecology, pH homeostasis and inhibition of dental caries. ADS activity in dental plaque varies greatly between individuals, which may profoundly affect their susceptibility to caries. OBJECTIVE: To investigate the effect of arginine on the growth and biofilm formation of oral bacteria. METHODS AND RESULTS: Polymicrobial dental biofilms derived from saliva were formed in a high-throughput active attachment biofilm model and l-arginine (Arg) was shown to reduce the colony forming units (CFU) counts of such biofilms grown for various periods or biofilms derived from saliva of subjects with different caries status...
June 24, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28666212/time-kill-kinetic-analysis-of-antimicrobial-chemotherapy-based-on-hydrogen-peroxide-photolysis-against-streptococcus-mutans-biofilm
#18
Midori Shirato, Keisuke Nakamura, Taro Kanno, Peter Lingström, Yoshimi Niwano, Ulf Örtengren
A recently developed antimicrobial technique utilizing hydroxyl radicals generated by hydrogen peroxide (H2O2) photolysis represents a promising new therapy for preventing and treating dental caries. The present study compared the antimicrobial time-kill kinetics of H2O2 photolysis, conventional antiseptics, and antimicrobial photodynamic therapy (aPDT) against biofilm-forming Streptococcus mutans (cariogenic bacteria) grown on hydroxyapatite disks. H2O2 photolysis was performed by irradiating the biofilm immersed in 3% H2O2 with 365-nm light-emitting diode (LED) light at an irradiance of 1000mW/cm(2) for up to 1...
June 21, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28662857/glass-ceramic-coating-material-for-the-co2-laser-based-sintering-of-thin-films-as-caries-and-erosion-protection
#19
Marin Dean Bilandžić, Susanne Wollgarten, Jochen Stollenwerk, Reinhart Poprawe, Marcella Esteves-Oliveira, Horst Fischer
OBJECTIVES: The established method of fissure-sealing using polymeric coating materials exhibits limitations on the long-term. Here, we present a novel technique with the potential to protect susceptible teeth against caries and erosion. We hypothesized that a tailored glass-ceramic material could be sprayed onto enamel-like substrates to create superior adhesion properties after sintering by a CO2 laser beam. METHODS: A powdered dental glass-ceramic material from the system SiO2-Na2O-K2O-CaO-Al2O3-MgO was adjusted with individual properties suitable for a spray coating process...
June 26, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28656929/effect-of-erbium-yttrium-aluminum-garnet-laser-on-bond-strength-of-a-total-etch-adhesive-system-to-caries-affected-dentin-on-gingival-wall
#20
F Cebe, M Bulbul, I Simsek, M A Cebe, B Ozturk
PURPOSE: To assess the effect of the erbium:yttrium aluminum garnet (Er:YAG) laser on bond strength of a total-etch adhesive system to the caries-affected dentin on the gingival wall. MATERIALS AND METHODS: Ten human molars with proximal carious lesions were randomly divided into two groups. In the first group, the carious dentin was removed with a bur, whereas in the second group it was removed with the Er:YAG laser. Carious lesions were excavated with one of these two techniques until laser fluorescence values decreased to 15 in the center of the lesions...
June 2017: Nigerian Journal of Clinical Practice
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